Issue 2015

Pages from: 15 to: 16

Language of the report: bulgarian

BULGARIAN INSTITUTE OF METROLOGY – ACHIEVEMENTS AND CHALLENGES IN THE FIELD OF SCIENTIFIC METROLOGY

1) Sasho Nedialkov 2) Antoaneta Yovcheva
1) Bulgarian Institute of Metrology, Sofia 1040, G. M. Dimitrov 52B Blvd., s.nedialkov@bim.government.bg, http://www.bim.government.bg 2) Bulgarian Institute of Metrology, Sofia 1040, G. M. Dimitrov 52B Blvd, a.yovcheva@bim.government.bg, http://www.bim.government.bg/

Abstract: This paper contains information about the achievements and challenges facing the Bulgarian Institute of Metrology (BIM) in the field of scientific metrology. Under review are the excellent results of BIM participation in international key comparisons to demonstrate international equivalence of standards in support of the calibration and measurement capabilities, and also the challenges - maintaining a high level of competence of employees, the participation in the work of the EURAMET bodies and in the projects under the European metrology program for research and innovation, EMPIR.

Key-words: scientific metrology, BIM, EURAMET, EMPIR, calibration and measurement capabilities (CMC).

Pages from: 17 to: 23

Language of the report: bulgarian

METROLOGICAL PROBLEMS IN THE ERA OF THE INTERNET OF THINGS

1) Kseniia Sapozhnikova 2) Roald Taymanov
1) D.I.Mendeleyev Institute for Metrology, 190005 St.Petersburg, 19 Moskovaky pr. k.v.s@vniim.ru 2) D.I.Mendeleyev Institute for Metrology, 190005 St.Petersburg, 19 Moskovaky pr. taymanov@vniim.ru

Abstract: The development of the microprocessor systems and the information technologies gives grounds for predicting fast growth of the number of products and objects interacting and being controlled through Internet, which is called a transfer to the era of the “Internet of Things”. All these products and objects include sensors, a number of various measuring channels in a system being equal to thousands or even hundreds thousands units. Traditional methods of metrological assurance cannot efficiently provide the measurement reliability in such situations. Metrological problems concerning the situation predicted and some approaches for their solving are considered in the paper

Key-words: Internet of Things, measuring system, multi-channel measuring system, cyberphysical system, intelligent measuring system, intelligent sensor, metrological self-check.

Pages from: 24 to: 30

Language of the report: russian

OPTIMIZATION OF PARAMETERS OF RELIABILITY OF MEANS OF MEASUREMENTS

1) Rannev G.G. 2) Surogina V.A. 3) Tarasenko A.P.
1) IIT, Str. Academician Korolev, 4, k.1, Apt. 458, Moscow, 129 515 Rusia; email: G.G.rannev@yandex.ru 2) MSEU (MAMI), Str. Pavel Korchagin, d. 22, Moscow, 107996 Rusia; email: syrogina@mail.ru 3) MSEU (MAMI), Str. Pavel Korchagin, d. 22, Moscow, 107996 Rusia; email: panteleevich@mail.ru

Abstract: Maximization of reliability in fixed term development and the ensurance of the accuracy required at a minimum cost of resources are the main tasks when creating the SR. This requires the development of clear requirements at all stages of the development of TK, TS, RD preproduction, production, test. Also very important stage is the operation, where uptime SI is guaranteed. The report is devoted to the requirements these stages of development.

Key-words: reliability, features, requirements, procedures, methods of monitoring, testing, checking, Identification, complex, sample, the number of observations

Pages from: 33 to: 40

Language of the report: russian

EXPERIMENTAL STATISTICAL METHODS FOR DETERMINING THE PARAMETERS OF QUALITY MEASUREMENT CHANNELS

1) Rannev G.G. 2) Surogina V.A. 3) Tarasenko A.P.
1) IIT, str. Academician Korolev 4, k.1, Apt. 458, Moscow 129515, Russia; email: G.G.rannev@yandex.ru 2) MSEU (MAMI), Str. Pavel Korchagin, d. 22, Moscow,107996, Russia; email: syrogina@mail.ru 3) MSEU (MAMI), Str. Pavel Korchagin, d. 22, Moscow,107996, Russia; email: panteleevich@mail.ru

Abstract: The task of determining the quality parameters of the generated SI directly depends on the quality characteristics of the error components of the measuring channel (IR), and the accuracy of the IR is determined by the precision of each instrument included in it. This paper discusses methods for determining the constituents and the resultant error of the IR.

Key-words: Measurement, error IR, random, systematic, major, minor, dynamic, the resulting error IR

Pages from: 41 to: 47

Language of the report: russian

Variance estimate of random signal at the output of the parameter sensor considering nonlinear distortion of transform function

1) Alexandr S. Semenov
1) South Ural State University, 454080, Chelyabinsk, pr. Lenina, 76, email: 560101@rambler.ru

Abstract: Considers the problem of estimating a random signal in additive noise taking into account possible nonlinear distortion in the receive path. Is used the method of decomposition of the distribution of the input signal and the nonlinear conversion on system of orthogonal functions. It is shown that the nonlinear component in the signal path leads to an additional valuation error, dependent of polynomial transformation autocorrelation function of the original signal. The obtained results can serve as a basis for the development of measurement systems with check error of measurement

Key-words: matched filtering, orthogonal functions, correlation function, transient characteristic, variance

Pages from: 48 to: 54

Language of the report: russian

STRUCTURAL AND ALGORITHMIC METHODS INCREASING RELIABILITY OF THE MEASUREMENT INSPECTION

1) Eugenij VOLODARSKY 2) Larysa KOSHEVA 3) Zygmunt WARSZA
1) NTU "KPI", Ukraine, Kiev.email: vet1@ukr.net 2) NAU, Kiev. l.kosh@ukr.net 3) IRIAM (PIAP), Warszawa Poland zlw@op.pl

Abstract: An auxiliary quantity, homogeneous with the measured one, is proposed to apply in testing of the object, which is measured through the measurement channel in order to reduce the impact of measurement error on the reliability of the control. The result of processing this quantity in measurement channel is used for additive and multiplicative adjustments of the settings limits. This allows reducing of the impact of the imperfect transfer characteristics in the measurement control. The effectiveness of the correction is evaluated. The influence of errors of forming the auxiliary quantity is also estimated.

Key-words: measurement channel, additive and multiplicative adjustments, settings limits, the measurement control, auxiliary quantity, equal intervals.

Pages from: 55 to: 60

Language of the report: english

SOME FEATURES OF ESTIMATES FOR MEASUREMENT ERROR AND MEASUREMENT UNCERTAINTY

1) Yuri Didik
1) UNIIM, 4 Krasnoarmeyskaya Str., Ekaterinburg, 620000 Russia email: lemma@uniim.ru

Abstract: The development of the concept of measurement uncertainty and the modern specification for “measurement result” definition as set of quantity values do not contradict the previously accepted concept for measurement error. These are different ways of border area estimation for said set. In this connection the classic definition for error of measurement, as “result of a measurement minus a true value of the measurand” needs to be saved in the normative documents. An example of joint use of “error” and “uncertainty” is showed.

Key-words: measurement result, error, uncertainty, true value, reference value

Pages from: 61 to: 63

Language of the report: russian

The estimated instrumental errors in the measurement of the specific conductivity of the thermoelectric semiconductor ingot

1) Nefedov S.V. 2) Rannev G.G.
1) MSUME (MAMI), 107023, Russia, Moscow, str. B.Semenovskaya, 38, email: nefedovs@yandex.ru 2) IIT, 107996, Russia, Moscow, Str. Pavla Korchagina, 22 email: G.G. rannev@yandex.ru

Abstract: The report describes a method for measuring of the specific conductivity of a thermoelectric semiconductor material used in the manufacture of thermoelectric cooling modules and the specifically designed for these purposes measuring information system. Special attention is paid to the question of assessing the accuracy of the measurement, the calculation of the instrumental error for the specific example of the thermoelectric ingot.

Key-words: Metrology, measurements, measuring systems, thermoelectricity, quality control, thermoelectric modules, specific conductance, semiconductor ingot.

Pages from: 64 to: 69

Language of the report: russian

INVESTIGATION OF SYSTEMATIC ERRORS OF THE STAND 6ГС40М FOR THE PURPOSE OF IMPROVING CALIBRATION THE STRAINGAGED BALANCES

1) Anastasia Bolshakova 2) Valeriy Volobuev 3) Vasiliy Petronevich
1) MIPT, 9 Dolgoprudnyi, Russia, email: anastasiabolaa@mail.ru 2) CAI, 1 Zukovski Str., Zukovski, 140180 Russia email: vs170439@gmail.com 3) MIPT, 9 Dolgoprudnyi, Russia, email: petronevich@tsagi.ru

Abstract: At the following article main sources of systematic errors of the calibration rig 6GS40M are considered. A design procedure for computation of forces and moments is presented in case of linear and angular deformations.Formulas of the calculation of transforming loads from stand coordinate system to geodetic coordinate system for random position of strain gaged balance are derived. An algorithm of loads calculation in balance’s coordinate system is also developed. The results of the investigation of the metrological performance of a six-component strain gaged balance on the calibration stand 6GS40M are given and the need for a special correction to the measuring loads explained.

Key-words: strain gaged balances, calibration rig, linear and angular deformations, matrix of rotation

Pages from: 70 to: 76

Language of the report: russian

METHODS OF VIRTUAL STANDARDS IMPLEMENTATION IN MEASURING AND TESTING TASK

1) A. Kuznetsov 2) O. Meshkova 3) V. Slepterev
1) OSTU, Russia, 644046, Omsk, pr. Marx, 35, email: kuznetsovaa@omgups.ru 2) OSTU, Russia, 644046, Omsk, pr. Marx, 35, email: olgameshk1@gmail.com 3) OSTU, Russia, 644046, Omsk, pr. Marx, 35, email: wedal@mail.ru

Abstract: This paper investigates the factors that influence to accuracy of recording spectra using virtual standards during atomicemission spectral analysis. A device and a data processing unit that increase the stability and reproducibility of the instrument calibration curve are suggested. The paper describes a mathematical model that compensates the influencing factors on the measurement results and the possibility of its application in the automated measuring systems software. The resultant calibration characteristics, built on the proposed model remain stable when ambient conditions change, or can be transferred to devices of the same type without loss of accuracy that is determined by individual calibration parameters.

Key-words: atomic emission spectral analysis, sensors, virtual standards, stable calibration curves, influencing factors.

Pages from: 77 to: 81

Language of the report: english

THE RUSSIAN STATE PRIMARY STANDARD SCALE TRANSFORMATIONS AC

1) Yuriy Sichev 2) Ekaterina Voronskaya
1) USRIM, ROSSTANDART, Ekaterinburg (UNIIM), 620000, Ekaterinburg, GSP824, 4 Krasnoarmeiskaia St, email: sichev@uniim.ru 2) USRIM, ROSSTANDART, Ekaterinburg (UNIIM), 620000, Ekaterinburg, GSP824, 4 Krasnoarmeiskaia St, email: ekaterina@uniim.ru

Abstract: A Russian State primary standard for scale AC transformations, its structure and operation are presented. Metrological characteristics and indicators of the accuracy of the playback unit ratio and angle scaling conversion are described. The results of international comparisons and new data on the measurement capabilities of the standard are presented. The comparative characteristics of measurement capabilities are shown.

Key-words: standard, current transformers, scale conversion of sinusoidal current.

Pages from: 82 to: 88

Language of the report: russian

THE NATIONAL PRIMARY STANDARD FOR THE UNIT OF PLANE ANGLE

1) T.P. Akimova 2) K.V. Chekirda
1) All-Russia D.I. Mendeleyev SRIM (VNIIM), Russia, St. Petersburg, 190005 Moskovsky pr., 19, e-mail: t.p.akimova@vniim.ru 2) All-Russia D.I. Mendeleyev SRIM (VNIIM), Russia, St. Petersburg, 190005 Moskovsky pr., 19, e-mail: k.v.chekirda@vniim.ru

Abstract: The systems included in the new national primary standard for the unit of plane angle and its metrological characteristics are discussed.

Key-words: plane angle, national primary standard, examinator, uncertainty.

Pages from: 89 to: 94

Language of the report: russian

Validation of a measurement standard of mass unit , length unit areas of center of gravity coordinates measurements and inertia moment unit for calibration of measuring instruments of mass and inertial characteristics of space-rocket branch products

1) O. Dovydenko 2) V. Petronevich 3) A. Samoylenko
1) CAI N.E. Zhukovsky, 1 Zhukovsky Street, TsAGI, Zhukovsky, Moscow Region, 140180, Russian Federation 2) CAI N.E. Zhukovsky, 1 Zhukovsky Street, TsAGI, Zhukovsky, Moscow Region, 140180, Russian Federation 3) CAI N.E. Zhukovsky, 1 Zhukovsky Street, TsAGI, Zhukovsky, Moscow Region, 140180, Russian Federation

Abstract: In the report questions of validation of the special standard intended for tests for the statement of type, verification and calibration of measuring instruments of weight, coordinates of the center of gravity and the moments of inertia of aircrafts are considered. Within the validation of this standard the local hierarchy scheme is developed for measuring instruments of mass and inertial characteristics of products, a measurement standard calibration procedure, passport, rules of the contents and application. The measurement procedure through which units of the variable are transmitted to the standard, is certified. Calibration and validation of a standard is carried out.

Key-words: Center of gravity coordinates, inertia moment, weight, measurement standard, testing, calibration, verification, validation.

Pages from: 95 to: 101

Language of the report: russian

National standard for sound pressure in air. Traceability. International comparisons

1) Marin Nenov Chushkov
1) NCM, 52-B, G.M. Dimitrov Blvd., 1797 Sofia, Bulgaria

Abstract: Short information about the National standard for sound pressure in air, created in 2005, accepted in 2009 and 10 years successful used in International comparisons is presented. Basic factors for uncertainty are discussed. Results of international comparisons with DPLA-Denmark, PTB-Germany and „EURAMET AUV A-K5”, NPL-UK are described.

Key-words: National standard, Sound pressure, Standard microphone, Reciprocity calibration.

Pages from: 102 to: 108

Language of the report: bulgarian

NEW MATRIX PRESENTATION OF THE INTERNATIONAL SYSTEM OF UNITS SI

1) Nikolay Alexandrov
1) BIM, GD NCM, Sofia, 2 “Prof. Peter Mutafchiev”str., e-mail: n.aleksandrov@bim.government.bg

Abstract: This report describes a new matrix presentation of The International System of Units - SI. The new matrix presentation of The International System of Units - NSI (New SI), was created in 2005 as result of an year author’s efforts and was investigated and developed during the last ten years. The report presents the structure, the properties and the capabilities of the new matrix system – fundamental structure of the physical quantities and units, geometrical presentation of the physical laws and the basic equations in the physics, implementation of new relations between the quantities and new terms in the physics.

Key-words: matrix presentation, quantities, units

Pages from: 109 to: 115

Language of the report: bulgarian

Bayesian approach to the measurement uncertainty evaluation in JCGM’s documents

1) I. Zakharov 2) O.A. Botsiura
1) Kharkiv National University of Radio Electronics, 14 Lenina ave., Kharkiv, Ukraine, newzip@ukr.net 2) Kharkiv National University of Radio Electronics, 14 Lenina ave., Kharkiv, Ukraine, newzip@ukr.net

Abstract: The report reviews the history and the prospects of the development of JCGM documents for evaluation of measurement uncertainty. It is shown that the application of the Bayesian approach in these documents is a strategic objective of WG 1 JCGM. Realization of the Bayesian approach in the current regulatory documents JCGM is reviewed. Contradictions between the GUM and these documents are shown.

Key-words: measurement uncertainty, probability density function, the law of propagation of distributions, the Bayesian approach, the Monte Carlo method.

Pages from: 116 to: 122

Language of the report: russian

IDENTIFICATION METHODS FUNCTIONS OF SEVERAL VARIABLES AS THE BASIS OF CONSTRUCTION CALIBRATION CHARACTERISTICS OF MEASURING INSTRUMENTS

1) M.V. Berzhinskaya 2) Yu.M Golubinskiy 3) A.A. Danilov
1) Penza state university; Russia, Penza, St. Krasnaya, 40; mberj@mail.ru 2) Penza state university; Russia, Penza, St. Krasnaya, 40; 3) Penza Center for Standardization, Metrology and Certificaion; Russia, Penza, St. Komsomolskaya, 20; aa-dan@mail.ru

Abstract: In this paper we propose a method for constructing the calibration characteristics of functions of several arguments with the help of the sensitivity coefficients. A comparison estimates sensitivity coefficients by multiple regression analysis and the method of least squares on the plane.

Key-words: calibration characteristic, sensitivity coefficients, rated operating conditions, measuring instruments.

Pages from: 125 to: 131

Language of the report: russian

ADEQUACY OF THE MATHEMATICALLY MODELLED TRANSFER CHARACTERISTIC OF A MEASURING DEVICE

1) Jordanov Rumen 2) Dukendjiev Georgi
1) Technical University - Sofia, 8, Kl. Ohridski St., BULGARIA, e-mail: rsi@tu-sofia.bg 2) Technical University - Sofia, 8, Kl. Ohridski St., BULGARIA, e-mail:duken@tu-sofia.bg

Abstract: The transfer characteristic of a measuring device is in essence a mathematical model, which describes the behavior of the conversion measurement chain, and in many cases, it is necessary to make justifications how well the model describes real processes in the device, i.e. the adequacy of this model. In the presented work, methods for checking the adequacy of the model are described, based on statistical criteria. An example is also discussed, illustrating the influence of the number of the experimental observations and the opportunities for a reliable assessment from a small amount of observations.

Key-words: measurement, modeling.

Pages from: 132 to: 136

Language of the report: bulgarian

STUDY THE INFLUENCE OF VIBRATORY INTERFERENCES ON THE ACCURACY OF MEASURING WITH PENDULAR SENSORS FOR VERTICAL

1) Dimitar Dichev 2) Hristofor Koev
1) Technical University-Gabrovo, 5300 Gabrovo, 4 H. Dimitar Str., dichevd@abv.bg 2) Technical University-Gabrovo, 5300 Gabrovo, 4 H. Dimitar Str., koevh@abv.bg

Abstract: The study presents mathematical models defining the behavior of bob sensitive elements in terms of vibrational interferences. The models are composed for conditions under which work similar measuring devices mounted on mobile objects. Through the displayed relations can be identified systematic deviations of sensitive elements of the local vertical. The vibrational offset from zero leads to emergence of "false" signal on the device for the presence of deviations of the basis from the vertical.

Key-words: vibratory interferences, sensors for a vertical, physical bob, mobile object, dynamic error, mathematical models

Pages from: 137 to: 144

Language of the report: bulgarian

Automation of data measuring processing by classification with training on the base wavelet transformation

1) Galina Shcherbakova 2) Victor Krylov 3) Svetlana Antoshchuk 4) Oksana Babilunga
1) ONPU-Odessa, Ukraine, Odessa, 1 Shevchenko av., e-mail: Galina_onpu@mail.ru 2) ONPU-Odessa, e-mail: Victor_Krylov@inbox.ru 3) ONPU-Odessa, e-mail: Svetlana_onpu@mail.ru 4) ONPU-Odessa, e-mail: babilunga@mail.ru

Abstract: The method classification with training on the basis of wavelet transformation for automation of data processing is designed. This method may be used for identification of the ranges of coefficients separating surfaces. This method may be used for choosing of classification parameters for given ranges of reliability in repairing of systems for processing of visual information. The result of investigation proved this method ability: the ranges of coefficients separating surfaces for test data are determined.

Key-words: automated classification, wavelet-transformation, automated systems, visual information processing, multi-start optimization, range of coefficient.

Pages from: 145 to: 150

Language of the report: russian

MODELING CHARACTERISTICS OF THE GAS DISCHARGE PATH OF THE GAS LASER

1) Golyan V.V 2) Golyan N.V
1) KhNUR, 61114, , Kharkov, Lenin Avenue,14, e-mail: veragolyan@yandex.ru 2) KhNUR, 61114, , Kharkov, Lenin Avenue,14, e-mail: nata2012.nn@gmail.com

Abstract: Investigation of the modelling, the optimization of the electronic device and the speeding of the tuning of proportional-integral-derivative (PID) controllers for controlling of the partial pressure of the components of a gaseous mixture in the gaseodynamic circuit of a gas laser. The developed software facilitates the automatic issue of the PID tuning and the process diary for the opreration of the device at each step of the optimization. .The software is developed for computer such as IBM PC/AO PENTIUM in the environment Borland C ++ Builder v.6.

Key-words: a discharge circuit, a communication device with abonenta, optimization coefficients, partialintegral- differential controllers

Pages from: 151 to: 156

Language of the report: russian

STUDY MODELS TO APPROXIMATE THE BASE OF VIRTUAL MECHANICAL STANDARD FOR STRAIGHTNESS

1) Rositsa Miteva 2) Georgi Dukendjiev
1) Technical University of Sofia, rosimiteva@tu-sofia.bg 2) Technical University of Sofia, duken@tu-sofia.bg

Abstract: Development and implementation of standards for form and location is the current metrological task. The integration of the measurement process with the information technologies enables the creation of a new type of virtual-mechanical standards with new capabilities and features. Study of mathematical models for interpolation and approximation of the elements of a Virtual mechanical standard for straightness are presented in the work A comparative analysis of the models used and the errors of interpolation of profiles of different types are discussed.

Key-words: standards of form, interpolation, approximation, virtual mechanical standard

Pages from: 157 to: 162

Language of the report: bulgarian

TECHNOLOGY OF CONSTANT PHYSICAL QUANTITY DYNAMIC MEASUREMENT

1) Alexey Lupachev 2) Igor Sapelkin 3) Nicholay Serov 4) Yuriy Bakhtin4 5) Alexander Shostak
1) National Research University "Moscow power Engineering Institute“, Institute of Automatics and Computer Engineering, Department of Information-Measuring Technique 14 Krasnokazarmennaya Str., Moscow, 111250 Russia, Web address: www.mpei.ru e-mail: LupachevAA@yandex.ru 2) National Research University "Moscow power Engineering Institute“, Institute of Automatics and Computer Engineering, Department of Information-Measuring Technique 14 Krasnokazarmennaya Str., Moscow, 111250 Russia, Web address: www.mpei.ru e-mail: civ9019@mail.ru 3) National Research University "Moscow power Engineering Institute“, Institute of Automatics and Computer Engineering, Department of Information-Measuring Technique 14 Krasnokazarmennaya Str., Moscow, 111250 Russia, Web address: www.mpei.ru e-mail: serna2004@list.ru 4) National Research University "Moscow power Engineering Institute“, Institute of Automatics and Computer Engineering, Department of Information-Measuring Technique 14 Krasnokazarmennaya Str., Moscow, 111250 Russia, Web address: www.mpei.ru e-mail: yuri.bekhtin@yandex.ru 5) National Research University "Moscow power Engineering Institute“, Institute of Automatics and Computer Engineering, Department of Information-Measuring Technique 14 Krasnokazarmennaya Str., Moscow, 111250 Russia, Web address: www.mpei.ru e-mail: shostak-93@mail.ru

Abstract: Discusses criteria for the end of the transition process in the measuring circuit, a model which can be represented by a dynamic element of the first order. It is shown that the most prevalent when building digital measuring devices, for example, a measure of the resistance winding of the power transformer DC, received a standardized criterion of interval type, characterized as empirical. The dependence, which determines the critical value of the maximum time constant of the measuring circuit.

Key-words: measurement circuit, the analysis of the transition process, the criteria for the end of the transition process, the duration of the observation interval, the critical time constant

Pages from: 163 to: 174

Language of the report: russian

Development of Equipment and Software for Inspection of Parameters of Gears and Gear Trains

1) Igor Vasilyevich Surkov
1) CJSC ChelyabNIIkontrol, 38 Sverdlovskiy trakt, Chelyabinsk, Russia, 454008, e-mail: suiv@toolmaker.ru

Abstract: This paper gives a brief description of the developed equipment, methodology and software for automated measurements of geometrical parameters of gears and gear trains. Issues on practical application of the method of comprehensive calibration of coordinate measuring machines (CMMs), instruments and systems with subsequent software compensation of detected systematic errors, as well as specific aspects of dimensional and accuracy analysis of coordinate measurement results, are described.

Key-words: coordinate measurement instruments, machines and systems, coordinate measurement software, inspection of geometrical parameters of gears and gear trains

Pages from: 177 to: 184

Language of the report: russian

AN INTELL IGENT RADIATION THERMOMETER FOR NONCONTACT TEMPERATURE MEASUREMENTS OF SMALL -SIZED OBJECTS

1) Nadezhda Chernysheva 2) Anton Ionov 3) Boris Ionov
1) Omsk STU, 644050 Russia, Omsk, Mira av., 11, e-mail: nadejda13.90@mail.ru 2) Omsk STU, 644050 Russia, Omsk, Mira av., 11, e-mail: antionov@mail.ru 3) Omsk STU, 644050 Russia, Omsk, Mira av., 11, e-mail: bion_rtu@mail.ru

Abstract: The article is devoted to the constructing of the experimental model of an intelligent radiation thermometer for the non-contact temperature measurements of small-sized objects. The key task of the research is to design an approach to neutralize the influence of the background radiation on the device’s readout. The radiation thermometer of a new type developed by the authors makes it possible to compensate the integral emissivity coefficient of the object and the impact of the stray background’s radiation, when the object-background areas ratio is not known beforehand. In the paper the results of the experimental study of a thermometer with temperature range 200...500 °С is shown.

Key-words: temperature, thermal control, non-contact temperature measurements, intelligent measurement devices, multi-channel radiation thermometer, information redundancy.

Pages from: 185 to: 191

Language of the report: russian

Pages from: 192 to: 194

Language of the report: russian

Features of the construction of portable eddy current flaw detector

1) Grigory Suchkov 2) Yurii Khomiak 3) Anton Slobodchuk 4) Svitlana Hloba
1) NTU "KhPI", Frunze str., 21, Kharkiv, Ukraine, 61002, e-mail: suchkov_gm@mail.ru 2) NTU "KhPI", Frunze str., 21, Kharkiv, Ukraine, 61002, e-mail: homyak-yv@mail.ru 3) NTU "KhPI", Frunze str., 21, Kharkiv, Ukraine, 61002, e-mail: slobodchuk_ay@mail.ru 4) NTU "KhPI" – NTU "KhPI", Frunze str., 21, Kharkiv, Ukraine, 61002, e-mail: sngloba@kpi.kharkov.ua, sngloba@mail.ru

Abstract: A block diagram of an eddy current flaw detector, which is controlled by a microcontroller is described. The microcontroller ATmega32 of Atmel Corporation is used as the controlling microcontroller. An eddy current flaw detector is designed and manufactured. Tests have shown that surface defects such as cracks are detected with minimal sensitivity to roughness on the surface of the control object and are identified in depth.

Key-words: eddy current transducer exciting winding, measuring winding, surface defect, crack, microcontroller, eddy current flaw detector.

Pages from: 195 to: 199

Language of the report: russian

SENSOR MODULE FOR THERMISTORS’ CONNECTION

1) Zvezditza Nenova 2) Nedyu Nedev 3) Stefan Ivanov
1) TU-Gabrovo, H.Dimitar 4 Str., Gabrovo, z_nenova@yahoo.com 2) TU-Gabrovo, H.Dimitar 4 Str., Gabrovo, nedyu.nedev@gmail.com 3) TU-Gabrovo, H.Dimitar 4 Str., Gabrovo, st_ivanov@abv.bg

Abstract: The temperature measurement is an important task in industry, agriculture, medicine, control of environmental parameters, lifestyle, etc. The present work proposes a sensor module for thermistors’ connection based on 555 timer and Pic16F1825 microcontroller. The sensor module has frequency output for direct connection to measuring systems using USB-module for data acquisition and control and two outputs to it from the microcontroller, where a preprocessing of the frequency signal can be carried out. Nonlinearity correction by selection of timer circuit parameters is made. Structure of a computer-based system for temperature measurement based on the developed sensor module and virtual instrument for its control are presented.

Key-words: thermistor, temperature sensor, sensor module, correction of nonlinearity

Pages from: 200 to: 204

Language of the report: bulgarian

OPTIMIZATION OF MODES OF MAGNETIZATION OF MAGNETIC PARTICLE INSPECTION

1) Ilya Novikov 2) Alex Pokrovskiy
1) NRU "MPEI", 111250 Moscow, Russia, Krasnokazarmennaya Street. 14 2) NRU "MPEI", 111250 Moscow, Russia, Krasnokazarmennaya Street. 14, e-mail: pokrovskiy@mail.com

Abstract: A method for the analysis of the magnetic field using magnetic particle inspection in technical diagnostics is presented. This paper focuses on the topography of the magnetic field in magnetization of the control object using electromagnet or permanent magnets. The conditions for detection of cracks of various configurations are derived. The results of investigations of the topography and distribution of the normal and tangential components of the magnetic field are described. The ways of applying the results are intended for metrological certification of technical diagnostics and the creation of test samples for testing metrological parameters of the devices in use.

Key-words: electromagnet, the topography of the magnetic field components of the magnetic field strength, metrological certification, technical diagnostics.

Pages from: 207 to: 210

Language of the report: russian

Magnetic Measurements of Ferrite Toroidal Samples

1) Miglenna Todorova 2) Valentin Mateev 3) Iliana Marinova
1) Technical University of Sofia, Sofia 1756, 8 Kliment Ohridski blvd., e-mail: miglenna_todorova@abv.bg 2) Technical University of Sofia, Sofia 1756, 8 Kliment Ohridski blvd., e-mail: vmateev@tu-sofia.bg 3) Technical University of Sofia, Sofia 1756, 8 Kliment Ohridski blvd., e-mail: iliana@tu-sofia.bg

Abstract: In this work ferrite material shaped as toroidal samples with different sizes and characteristics are experimentally investigated. Experiments were conducted in a wide frequency range using a specially developed precision measuring system. A system allows measurements in the frequency range from 25 Hz to 2 MHz. Results are obtained for the complex magnetic permeability of the magnetic materials at different frequencies and field intensities. An evaluation of the field homogeneity in the samples is made by a quasi-static computational model. The model is implemented with the program Maxwell 16.0.

Key-words: magnetic materials, ferrites, magnetic characteristics measuring system, high frequency, complex magnetic permeability

Pages from: 211 to: 216

Language of the report: bulgarian

VISUAL MEANS FOR ROTOR HEAT IMBALANCE IDENTIFICATION

1) Ivanka Kalimanova 2) Sergii Bogucharskiy 3) Yurii Megel 4) Olena Mikhnova
1) TU-Sofia, Blvd.Cl.Ohridski 8, Sofia 1000, Bulgaria, ikaliman@tu-sofia.bg 2) Kharkiv NURE, 61166, Ukraine, Kharkiv, Lenina av., 14, sbogucharskiy@rambler.ru 3) Kharkiv Petro Vasylenko NTUA61002, Ukraine, Kharkiv, Artema str., 44, megel_ye@mail.ru 4) Kharkiv Petro Vasylenko NTUA61002, Ukraine, Kharkiv, Artema str., 44, elena_mikhnova@ukr.net

Abstract: Rotor heat imbalance measurement and identification is one of the main issues faced by experts during electrical machine testing. This procedure usually takes a lot of time and human resources. Proposed techniques of video processing, namely key frame extraction, ensure quick detection of problematic segments in video acquired from the object, which helps experts in making right decisions concerning the required maintenance or repair in shorter terms. Salient information in frames is analyzed using visual features of color, texture and shape of segmented areas. An overview of the proposed means for efficient elimination of redundant video information is provided. The resultant key frames presented by separate images can be appended to bench test reports.

Key-words: hydrogen rotor ventilation, heat imbalance, video processing, visual features, key frame extraction, artificial intelligence.

Pages from: 217 to: 220

Language of the report: english

MEASUREMENT OF LARGE SHAFT DIAMETERS

1) Hristo Radev 2) Vasil Bogev 3) Velizar Vassilev 4) Nikola Panchev 5) Milko Djambazov 6) Aleksey Voloshin 7) Igor Naduev 8) Vadim Samoylov 9) Elena Ignatova
1) TU of Sofia, e-mail: hradev@tu-sofia.bg 2) TU of Sofia, e-mail: bogev@tu-sofia.bg 3) TU of Sofia, e-mail: vassilev_v@tu-sofia.bg 4) „NIK 47“ Ltd., e-mail: office@nik47.com 5) TU of Sofia, e-mail: milkodjambazov@gmail.com 6) NMZ, e-mail: voloshin@nkmz.donetsk.ua 7) NMZ, e-mail: voloshin@nkmz.donetsk.ua 8) NMZ, e-mail: voloshin@nkmz.donetsk.ua 9) Intertek Ukraine, e-mail: ien@intertek.com.ua

Abstract: This article discusses a method for the measurement of the root-mean-square circles of the important cylindrical surfaces of large-scale shafts. The method allows the realization of the measurement directly on the machine by the use of the results of measuring the radial runout of the relevant cross-sections of the shaft and of one attached to the shaft forehead etalon ring which has pre-calibrated both the diameter and as well as its roundness deviation. The main sources of uncertainty have been analyzed.

Key-words: large shafts, measurement of diameters, uncertainty

Pages from: 221 to: 225

Language of the report: bulgarian

DETERMINATION OF ERRANT RUN-OUT OF THE AXIS OF ROTATION OF OBJECTS, PERFORMING ACCURATE ROTATIONAL MOVEMENTS

1) Hristo Radev 2) Vasil Bogev 3) Velizar Vassilev
1) TU of Sofia, e-mail: hradev@tu-sofia.bg 2) TU of Sofia, e-mail: bogev@tu-sofia.bg 3) TU of Sofia, e-mail: vassilev_v@tu-sofia.bg

Abstract: This article discusses problems of the accuracy of the axes position of objects accomplishing rotary motion. Different schemes to estimate the errant run-out of the axes and faces of object tables are proposed, as well as their capabilities are estimated.

Key-words: Rotary motion, radial and axial run-out, errant radial and axial run-out.

Pages from: 226 to: 234

Language of the report: bulgarian

MEASUREMENT OF GEOMETRICAL PARAMETERS OF ROTATION PARTS RING TYPE

1) Hristo Radev 2) Ivailo Blagov 3) Vasil Bogev
1) TU of Sofia, e-mail: hradev@tu-sofia.bg 2) TU of Sofia, e-mail: blagov@tu-sofia.bg 3) TU of Sofia, e-mail: bogev@tu-sofia.bg

Abstract: This article discusses the measurement of the geometrical parameters (diameters and form and position deviations) of important large-scale shafts of type "ring". The measuring system is based on a carousel lathe, universal measurement tools for linear sizes, specialized measurement equipment and appropriate software and allows the measurement of geometric parameters details directly on the machine. The proposed measurement methodologies are based on the assessment of the deviations of form and position by the use of the results of the measurement of both the radial and axial run-out, with and without the exclusion of the errant run-out. In the first case, these results are brought to a virtual initial datum (axis) through the introduction of relevant corrections.

Key-words: measurement, large rotation parts, geometrical parameters.

Pages from: 235 to: 240

Language of the report: bulgarian

RESEARCH OF OPTICAL PROPERTIES OF Al AND Au THIN FILMS

1) Nikolay Alexandrov
1) BIM, GD NCM, Sofia, 2 “Prof. Peter Mutafchiev”str. e-mail: n.aleksandrov@bim.government.bg

Abstract: This report describes the measurement results from research of optical properties of Al and Au thin films. The research was held by UV/Vis/NIR spectrophotometer CARY 5000 in the spectral range for wavelengths from 350 to 3300 nm. The temperature dependence of spectral transmittance was researched. The influence of electric direct current magnitude on thin films was also researched. There were conducted researches by AC voltage with different frequency. Investigations are carried out for different angle of thin films probes in relation to incident beam and also influence of the beam polarization over them.

Key-words: thin films, spectrophotometer, spectral range.

Pages from: 241 to: 246

Language of the report: bulgarian

News in the domain of noise and vibration - from SPECTRI Ltd .

1) Boris Mihaylov 2) Tatiana Georgieva
1) SPECTRI Ltd., 30, “St. T. Turnovski” Str., Sofia 1421, e-mail: spectri@spectri.net 2) SPECTRI Ltd., 30, “St. T. Turnovski” Str., Sofia 1421, e-mail: office@spectri.net

Abstract: In the present paper a general overview of the SPECTRI Ltd. activity and related news in first half of 2015 is presented. The new areas of SPECTRI Ltd. development are briefly described as activity, market presence, new produced and distributed products and solutions, and as well as the systematic maintanence of the company’s expert capacity. Realized projects are included. SPECTRI Ltd. continues in an organized and systematic way its development as national center of competence in the field of noise and vibration.

Key-words: Noise, vibration, PM10, PM2.5, seismics. SPECTRI Ltd., WEBNOISE, Brüel & Kjær, PCH Engineering, Adash.

Pages from: 249 to: 253

Language of the report: bulgarian

Overview and comparison of calibration systems and the applicability of international standards

1) Boris Mihaylov 2) Milcho Georgiev
1) SPECTRI Ltd., Sofia, 30, T. Turnovski str, e-mail: spectri@spectri.net 2) TU-Sofia, 8, Kl. Ohridski str., e-mail: mtge@tu-sofia.bg

Abstract: This paper presents and analyzes systems for primary and secondary calibration based on a Type 3630 Brüel & Kjær and applicability of international standards for calibration of sound level meters, octave filters, microphones and acoustic analyzers according to IEC 60651, IEC60804, IEC 61094, IEC 61672.

Key-words: Calibration, systems for calibration of sound level meters, microphones

Pages from: 254 to: 259

Language of the report: bulgarian

Configuration , implementation and practical conclusions in building a system for continuous vibration monitoring of industrial machinery and facilities

1) Milcho Georgiev 2) Boris Mihaylov
1) TU-Sofia, 8, Kl. Ohridski str., e-mail: mtge@tu-sofia.bg 2) SPECTRI Ltd, Sofia, 30, T. Tarnovski str., e-mail: spectri@spectri.net

Abstract: This paper presents the configuration of a system for continuous vibration monitoring of industrial systems and facilities, and a practical system implementation based on the new product range Vibration control PCH1420 and PCH1120 in cooperation with partner for Spectri Ltd - Vibration monitoring PCH Engineering A/S. A concept is defined in configuration PCH1420 based system, selection and location of measuring points and configuration parameters. Working assessment of the accuracy of measurement in all control points is performed with the system PULSE Reflex 3560-B of Brüel & Kjær.

Key-words: Vibration, Noise, Vibration and Noise measurement, Monitoring, Vibration Control

Pages from: 260 to: 266

Language of the report: bulgarian

REALIZATION OF A COMPLEX PROJECT FOR DETERMINATION OF ACOUSTICS CHARACTERISITCS OF TRANSFORMERS. RESULTIVE SOUND POWER VALUE. MEASUREMENTS IN SOUND INSULATED CHAMBER.

1) Boris Mihaylov
1) SPECTRI Ltd., 30, “St. T. Turnovski” Str., Sofia 1421, e-mail: spectri@spectri.net

Abstract: In the present paper the concept, realisation, and results from SPECTRI executed project for determination of acoustics characteristics and sound power value of transformers are presented. A realisation of automated measurements in sound insulated chamber is described.

Key-words: Acoustics indexes, noise, sound power, multy-channel sound measurements, transformers

Pages from: 267 to: 270

Language of the report: bulgarian

PRESENTING THE CONCEPT AND REALISATION OF COMPLEX PROJECT FOR DELIVERY OF GOODS, SERVICES, KNOW-HOW, AND EXPERTISE FOR REALISATION OF ON-LINE MONITORING AND ENVIROMENTAL NOISE MANAGEMENT BY SOFIA AIRPORT

1) Boris Mihaylov 2) Milcho Georgiev
1) SPECTRI Ltd., 30, “St. T. Turnovski” Str., Sofia 1421, e-mail: spectri@spectri.net 2) TU-Sofia, 8, “Kl. Ohridski” blv., Sofia 1700, e-mail: mtge@tu-sofia.bg

Abstract: In the paper the overall information the started in year 2015 project for entire renewal of Sofia Airport system for aircraft noise monitoring is presented. The overall concept and activities for realization of complex project are clarified.

Key-words: noise, noise impact, airport, aircraft noise, noise management, cloud service, acoustics expertise, Noise Desk, Brūel & Kjær, SPECTRI.

Pages from: 271 to: 277

Language of the report: bulgarian

PRESENTATION OF SPECTRI OWN SOLUTION FOR MEASUREMENT, MONITORING, AND REAL TIME DISPLAY OF ENVIRONMENTAL PARAMETERS (NOISE, VIBRATIONS, DUST, METEO DATA, ETC.) – WEBNOISE.EU APPLICATIONS IN BURGAS, PLOVDIV, OTHERS

1) Boris Mihaylov
1) SPECTRI Ltd., 30, “St. T. Turnovski” Str., Sofia 1421, e-mail: spectri@spectri.net

Abstract: In the paper the overall information and intermittent results of the started in 2012 research and development SPECTRI integrated portal approach for on-line monitoring and internet access to measurement data for environmental parameters are presented. The R&D SPECTRI activity, and the system integrated approach for cloud on line monitoring of environmental and industrial parameters are described. Latest new for product WEBNOISE.eu – 2014-2015 are included.

Key-words: Environmental parameters, noise, vibrations, dust, meteo data, pH, monitoring, cloud service, WEBNOISE, ESMU.

Pages from: 278 to: 284

Language of the report: bulgarian

METROLOGICAL ASSURANCE OF MEASURING CURRENT TRANSFORMERS IN THE RUSSIAN FEDERATION

1) Andrey Akhmeyev 2) Alexander Shaburov
1) UMRI, 4 Krasnoarmeyskaya str., Ekaterinburg, Russia 620000 e-mail: lab262@bk.ru 2) UMRI, 4 Krasnoarmeyskaya str., Ekaterinburg, Russia 620000 e-mail: shaburov79@yandex.ru

Abstract: The report indicates regulatory documents which provide necessary guidance for metrological assurance of measuring current transformers. Transfer of measurements from national primary standards in accordance with measurement chain to working measuring instruments is considered. Availability of reference standard equipment in the Russian Federation is shown.

Key-words: verification, standard, measuring current transformers, scaling of sinusoidal current, error.

Pages from: 287 to: 291

Language of the report: russian

FREQUENCY RESPONSE CORRECTION OF THE POWER QUALITY MEASURING INSTRUMENT CHANNEL CONTAINING DELTA SIGMA ADC

1) Sasho Nedialkov1 2) Antoaneta Yovcheva 3) Serov A. N. 4) Shatokhin A. A.
1) Bulgarian Institute of Metrology, Sofia 1040, G. M. Dimitrov 52B Blvd., s.nedialkov@bim.government.bg, http://www.bim.government.bg/ 2) Bulgarian Institute of Metrology, Sofia 1040, G. M. Dimitrov 52B Blvd, a.yovcheva@bim.government.bg, http://www.bim.government.bg/ 2) Bulgarian Institute of Metrology, Sofia 1040, G. M. Dimitrov 52B Blvd, a.yovcheva@bim.government.bg, http://www.bim.government.bg/ 3) NRU «MPEI», 111250, Moscow, Krasnokazarmennaya st. 14, e-mail serov.an.iit@yandex.ru 4) NRU «MPEI», 111250, Moscow, Krasnokazarmennaya st. 14, e-mail sh1@yandex.ru

Abstract: Now the manufacturers of integrated chips let out delta sigma ADC, focused on application in the measuring channel of power quality measuring instruments (PQ MI). The frequency characteristic of such ADC is determined by the built-in digital filter, as a rule, with structure "cascaded integrator comb". However, the quality of this filter as a lower frequency filter is mediocre: the filter has recession of the frequency response (FR) in a pass-band and rather big width of a transitional band. In the report, two options of a FR correction method of delta-sigma ADC contained in the PQ MI channel are considered. The first option assumes use of one correcting digital filter compensating recession of delta-sigma ADC FR in a pass-band and reducing width of a transitional band. The second option assumes use of two correcting filters - one to compensate recession of ADC in a pass-band, and a second to reduce the width of a transitional band.

Key-words: power quality measuring instruments, delta-sigma ADC, correction of the frequency response.

Pages from: 292 to: 297

Language of the report: russian

DETERMINATION OF THE NECESSARY LEVELS OF SUSTAINABILITY OF THE AUTOMATED CONTROL SYSTEMS TO ELECTROMAGNETIC INTERFERENCE FROM LIGHTNING DISCHARGE

1) Volodymyr Kniaziev
1) NTU “KPI”, RDI “Molniya”, Shevchenko str. 47, Kharkiv, 61013, UA, e-mail: knyaz2@i.ua

Abstract: This paper presents some of the practical aspects of the analysis of the functional safety equipment in conditions of electromagnetic interference. The methodology of harmonization of the level of stability of the automated control systems of a strategic object to possible electromagnetic interference accompanying the lightning discharge is presented. The statistical method for calculating the probability density of the lightning strikes in parts of the subject and the method of experimental determination of the lightning channel current spreading are explained in detail. The methods have been tested on a power plant in Ukraine.

Key-words: functional safety, the probability of a lightning strike, the lightning current, the level of sustainability

Pages from: 298 to: 304

Language of the report: russian

Measurement of the voltages and current in electric circuit of the semiconductor converters to electric powers with fifteen zoned regu-lations of the output voltage

1) V.V. Mihaylenko 2) D. K. Makov 3) T.V. Chunikhina
1) National technical university of Ukraine ”Kiev polytechnic institute”, Pobedy, 37, Kiev-56, 03056, Ukraine, e-mail: VladislavMihailenko@i.net 2) National technical university of Ukraine ”Kiev polytechnic institute”, Pobedy, 37, Kiev-56, 03056, Ukraine, e-mail: VladislavMihailenko@i.net 3) NTU “KhPI”, “Informational-measuring technologies and systems”, Frunze str., 21, Kharkiv, Ukraine, tetianactv@ukr.net

Abstract: This article deals with analysis of the transient processes in electric circuits with semiconductor commutators. Mathematical model is developed for analysis of the transient processes in semiconductor converters of electric power.

Key-words: connecting processes, semiconductor converters

Pages from: 305 to: 308

Language of the report: russian

VALIDATION OF TEST SITE FOR RADIATED POWER MEASUREMENTS WITH ABSORBING CLAMP (ACTS)

1) Nikolai Panteleev 2) Kalin Marinov 3) Ivo Dochev 4) Borislava Medzhidieva
1) ICCT BAS, e-mail: emclab@abv.bg 2) Bulgarian Institute of Metrology, e-mail: emclab@abv.bg 3) TU – Sofia, 8 Kliment Ohridski Blvd, e-mail:idochev@tu-sofia.bg 4) Bulgarian Institute of Metrology, e-mail: emclab@abv.bg

Abstract: The measuring of the radiated power of installations on power cords with absorbing clamp is performed in test sites. The procedure, the experimental tests and the results from the validation of the test sites for measuring of the radiated power from the power cords with absorbing clamp of Testing Laboratory for EMC at Bulgarian Institute of Metrology, according to BDS EN 55016-1-3 is described in the report. Comparisons of data received from different experimental tests have been done.

Key-words: radiated power, validation, electromagnetic compatibility, test site

Pages from: 309 to: 314

Language of the report: bulgarian

Automated workstation for metrological verification of measurement transducers TRIAD s232

1) Bosilkov 2) K. K. 3) Banev
1) The Kozloduy NPP Plc, e-mail: kkbosilkov@npp.bg 2) The Kozloduy NPP Plc, e-mail: kbanev@npp.bg 3) The Kozloduy NPP Plc, e-mail: biborisov@npp.bg

Abstract: The report presents a developed automated workplace (AWP)(ARM) for metrological verification of measuring transducers in the nuclear power plant in the town of Kozloduy. A brief description of the programming language LabView is given. The structure of the AWP, the hardware components, the modes of operation of the program and the working screens are discussed

Key-words: National Instruments, LabView, metrology verification, measuring transducers

Pages from: 315 to: 318

Language of the report: bulgarian

CONDUCTOMETRIC APPARATUS FOR MEASUREMENT OF CONDUCTIVITY OF LIVING SINGLE CELLS

1) Y. E. Megel 2) V. A Shigimaga 3) S. N. Kovalenko 4) I. I. Kalimanova 5) A. I. Rubalka
1) Kharkiv Vasilenko NTUA, St. Artema 44, city Kharkiv, Ukraine, 61002; e-mail: megel_ye@mail.ru 2) Institute of Animal HAAH, Kharkov district, village Kharkov district, village. Kulinichi Street. 7th Guards Army, 3, 62404; e-mail: vash105@gmail.com 3) Kharkiv Vasilenko NTUA, St. Artema 44, city Kharkiv, Ukraine, 61002; e-mail: kovalsvt@rambler.ru 4) TY-Sofiа, Blvd. Cl. Ohridski 8, Sofia 1000; e-mail: ikaliman@tu-sofia.bg 5) KHNURE, Lenin Av. 14, city Kharkiv, Ukraine, 61002; e-mail: airybalka@mail.ru

Abstract: In the work on the basis of the examination of the conductometric methods and apparatus it has been shown that these methods cannot be applied directly for the conductivity measurement of single living cells. It is therefore necessary to design technical means based on a new principle of the impact of a pulsed electromagnetic field (PEF) with increasing intensity on these bio-objects and, respectively, to develop Squarewave Generator (SWG) with specified parameters. Furthermore, the pulse action solves the problems of the microelectrodes polarization and electrolysis in a liquid medium.

Key-words: electroporation, the conductivity of cell membranes, pulsed electromagnetic field, generator of rectangular pulses, optimization of the parameters of the generator

Pages from: 321 to: 327

Language of the report: russian

ASSESSMENT OF UNCERTAINTY IN CALCULATING HYDRODYNAMIC RESISTANCE COEFFICIENT OF A NASAL CAVITY

1) Andriy Yerokhin 2) Alina Nechyporenko 3) Vitaliy Chmovzh 4) Oleg Garyuk
1) KhNURE, 14 Lenina, Ave., Kharkiv, 61160 Ukraine 2) KhNURE, 14 Lenina, Ave., Kharkiv, 61160 Ukraine e-mail: alinanechiporenko@gmail.com 3) NAU, 17 Chkalova, str., Kharkiv, 61070, Ukraine, e-mail: v.chmovzh@khai.edu 4) KhMAPE, 58 Korchagintsev St., Kharkiv, 61176, Ukraine, e-mail: o.garyuk@gmail.com

Abstract: The improved method of receiving hydrodynamic resistance coefficient of a nasal cavity is described. This coefficient takes into account the regimes of flow in the course of breathing and also the specific anatomicophysiological features of a person’s nasal cavity. The assessment of total standard uncertainty of calculation of the hydrodynamic resistance coefficient is conducted.

Key-words: Rhinomanometry, airflow, hydrodynamic resistance coefficient, Reynold’s number, standard uncertainty

Pages from: 328 to: 333

Language of the report: russian

Tissue Based Biosensor for Phenol Measurement Using the Principle of Inhibition

1) Antonia Pandelova
1) TU-Sofia, Kl. Ohridsky Blv. 8, e-mail: apandelova@tu-sofia.bg

Abstract: Tissue biosensors for measuring concentration of phenol using the principle of inhibition are developed. Zucchini tissue Cucurbita pepo is used as source of the enzyme ascorbate oxidase. The influence of the storage temperature of the tissue material on the output signal is investigated. Biosensors show good linearity and high sensitivity to the measured inhibitor. In tabular form are shown the basic characteristics such as pH of the analysed medium, the linear measurement range, the correlation coefficient R2, reaction time. It proves the possibility tissue biosensor to measure inhibitors of the enzyme ascorbate oxidase.

Key-words: tissue biosensor, Cucurbita pepo, phenol, inhibition

Pages from: 334 to: 337

Language of the report: bulgarian

IMPROVING THE METHOD OF EXCESS AIR RATIO DETERMINATION DUE TO CLIMATE VARIATION

1) Arthur Zaporozhets
1) IET NAS of Ukraine, 03057, Kiev, 2a Zhelyabova Str., e-mail: art.morco@gmail.com

Abstract: The methods for excess air ratio determination based on the measurement of the combustion gases concentration in the thermal units are considered. It is shown that the value of oxygen volume concentration in the environment, which is used in excess air ration measuring, is not constant (21% in volume), and depends on the climatic factors – temperature, absolute pressure and relative humidity. The method proposed for excess air ratio measuring is based on the oxygen current concentration in the air.

Key-words: excess air ratio, combustion, optimization, measurement, oxygen sensors, exhaust gas, power system

Pages from: 338 to: 342

Language of the report: russian

RECOGNITION OF INDOOR GASEOUS AIR POLLUTANTS

1) Georgi Georgiev
1) TU-Gabrovo, Gabrovo, 4 “H. Dimitar”, givanow@abv.bg

Abstract: In this paper are presented the results from recognition of volatile organic compounds (VOCs) by backpropagation neural networks and methods of k - nearest neighbors and decision tree. The three-layer architecture of an artificial neural network with thirteen hidden neurons, a classifier with defined city block metric distance between five k – nearest neighbors and classification model at third pruning level of tree are selected.

Key-words: volatile organic compounds, artificial neural network, k – nearest neighbors, decision tree.

Pages from: 343 to: 348

Language of the report: bulgarian

MEASURING AND REPORTING OF WATER VOLUMES IN INDUSTRIAL ENTERPRISES

1) Veselin Grigorov 2) Sava Savov 3) Atanas Atanasov
1) University of Ruse ‘Angel Kanchev’, 8 Studentska Street, vgrigorov@uni-ruse.bg 2) W and S-Русе, ул. “Добруджа” 6, sava_savov@abv.bg 3) University of Ruse ‘Angel Kanchev’, 8 Studentska Street, asatanasov@uni-ruse.bg

Abstract: The implementation of effective control of water consumption in production processes combined with the economical mechanisms for paying incoming and waste water is a stimulus and motivation for undertaking activities aimed at mindful use of water and preservation of natural resources.

Key-words: effective control, waste water, natural resources.

Pages from: 349 to: 352

Language of the report: bulgarian

POSSIBILITY FOR RATIONAL SAMPLING WHEN READING WATER CONSUMPTION DATA USING THE VOLUME METHOD

1) Veselin Grigorov 2) Sava Savov 3) Atanas Atanasov
1) University of Ruse ‘Angel Kanchev’, 8 Studentska Street, vgrigorov@uni-ruse.bg 2) W and S-Русе, ул. “Добруджа” 6, sava_savov@abv.bg 3) University of Ruse ‘Angel Kanchev’, 8 Studentska Street, asatanasov@uni-ruse.bg

Abstract: When continuously measuring the flow rate of waste water, the continuity of measurement is combined with discrete acts of collecting samples. This causes problems related to determining the integral assessments of the quantity and quality of waste waters and problems of proportionality between the moment flow rate and the sample size

Key-words: waste water, quantity, quality, moment debit

Pages from: 353 to: 356

Language of the report: bulgarian

Monitoring of the soil by measuring the electrical impedance and applying the EIS method

1) Svetlana Georgieva Gerganova-Savova 2) Daniela Simeonova Toneva - Zheynova
1) TU - Varna, Bulgaria, Varna, Studentska str.1; e-mail: gerganova-savova@mailcity.com 2) TU - Varna, Bulgaria, Varna, Studentska str.1; e-mail: d_toneva@abv.com

Abstract: The system for sustainable development works by following the founding PDCA cycle, where in phase "C" is set check, monitoring. The method of Electrochemical Impedance Spectroscopy (EIS) is widely accepted in many areas. In this article its advantages are complemented by a portable device for measuring the impedance of the soil - Z-Meter III. The analysis of the characteristics of different soils shows certain connections between the depths, temperature, humidity, salts, resistance.

Key-words: Monitoring, method of Electrochemical Impedance Spectroscopy (EIS), Z-Meter III, the PDCA cycle.

Pages from: 357 to: 360

Language of the report: bulgarian

Humanitarian measurements and problems of normative ethics (What would be important for scientists, and the entire socium)

1) Vladimir Petrov
1) State Institute for Art Studies, Moscow, e-mail: vladmpetrov@yandex.ru

Abstract: : In the framework of the systematic-informational approach, links are analyzed between normative ethics and humanitarian measurements. The necessity of hierarchical approach is shown for the phenomena crossing the borderlines of individual activity. Ethical estimations become more valid when their criteria are based on the entropial concept of vertical axis, co-ordinates of which respond to high – and low, noble – and base, and so forth. The results of measurements can be used in various fields of social practice, including cultural politics

Key-words: hierarchy, socium, scaling, entropy, consciousness, morality

Pages from: 363 to: 372

Language of the report: russian

Measurement of happiness – seasonal determination

1) Vladimir Petrov 2) Lidia Mazhul 3) Giuliano Lombardo
1) State Institute for Art Studies, Moscow, Russia, e-mail: vladmpetrov@yandex.ru 2) State Institute for Art Studies, Moscow, Russia 3) Academy of Fine Arts, Sassari, Italy, e-mail: giuliano@keybit.net

Abstract: Abstract. More than 30 years ago, a method of measurement was derived in the framework of the systematic-informational approach, permitting to estimate quantitatively the degree of subject’s happiness on the basis of a specific visual illusioin. Recently an idea appeared to connect this method with the concept of the seasonal determination of subject’s activity To prove this idea empirically, a series of psychological experiments were organized: months of birth of 74 students and post-graduates of the University of Cassino and the Academy of Fine Arts in Sassari, occurred to be influencing upon the degree of the subjects’ happiness, this impact being different for males and females. The explanation of such phenomena deals with the intensity of solar radiation while the most important prenatal phases determining the child’s hemispheric features. Despite the preliminary character of the obtained results, they do supply evidence of the practical significance of such measurements.

Key-words: perception illusion, information theory, measurements, happiness, pregnancy, hemisphericity, cross-cultural investigations

Pages from: 373 to: 377

Language of the report: english

Measurements of Sound Properties in Russian Musical Science

1) Alexander Kharuto
1) Moscow P. I. Thaikovsky Conservatory, Bolshaya Nikitskaya str., 13, Moscow, Russian Federation, e-mail: akharuto@yahoo.com

Abstract: Objective measurements of the sound may be useful in musicology, but technical possibilities limited the progress of these investigations. First attempts of musical sound measurements in Russia were made in 1920th by Russian physicists V. Kazansky and S. Rzhevkin and then by musicians N. Garbuzov and A. Rabinovich. Now, measurements of physical parameters of musical sound will be fulfilled on computer. An universal program (SPAX) for this aims is developed by the author. With the help of SPAX, investigations are carried out in the field of the traditional and academic music, including vocal and instrumental music.

Key-words: music, sound, computer, program, measurement, musicology, Russia, traditional musical culture

Pages from: 378 to: 384

Language of the report: english

METROLOGICAL ANASYSIS AS THE BASIS FOR SYSTEMIC NEUROPHYSIOLOGICAL INVESTIGATION

1) Roald Taymanov 2) Kseniia Sapozhnikova 3) Yulia Baksheeva
1) D.I.Mendeleyev Institute for Metrology, 190005 St.Petersburg, 19 Moskovsky pr. e-mail: taymanov@vniim.ru 2) D.I.Mendeleyev Institute for Metrology, 190005 St.Petersburg, 19 Moskovsky pr. e-mail:k.v.s@vniim.ru 3) Saint Petersburg State University of Aerospace Instrumentation, 190005 St.Petersburg, ul. Bol'shaja Morskaja, baksheyeva@rambler.ru

Abstract: At present, development of the concept related to the algorithms of solutions which are made in the human or animal brain and concern physiological function regulation and behavior motivation, is actual. It is shown that the strict (in the context of metrology) definition of a multidimensional measurand, development of a measurement model and measurement procedure, as well as analysis of measurement results enable determination of the algorithms required. It is also possible to evaluate dynamic characteristics of their realization. Examples are given.

Key-words: multidimensional quantity, measurement model, measurement of emotions

Pages from: 385 to: 390

Language of the report: russian

DESIGNING OF EFFICIENT INTERACTION MODEL: INTELLIGENT MEASURING DEVICE – OPERATOR

1) Anton Ionov 2) Nadezhda Chernysheva
1) Omsk STU, 644050 Russia, Omsk, Mira av., 11, e-mail: antionov@mail.ru, 2) Omsk STU, 644050 Russia, Omsk, Mira av., 11, e-mail: nadejda13.90@mail.ru

Abstract: The research described in the paper explains the key points of the new concept of the information interchange between a measuring device and service staff (an operator). This approach’s aim is to improve the results’ quality by the use of supplementary (a priory) information received from the operator. At the same time the possibility of deliberate or undeliberate staff’s inadequate interference into the measuring process should be absent. As an example, the designed model of the interaction of the operator and intelligent radiation thermometry monitoring system for industrial application is described.

Key-words: intelligent measuring device, human factor, a priori data, reliability of information, measurement model, adaptation, radiation thermometry.

Pages from: 393 to: 399

Language of the report: russian

METHODS FOR CONTROL AND IDENTIFICATION OF COMPUTER SYSTEMS STATE BASED ON BDS-TESTING

1) Sergey Semenov 2) Svetlana Gavrilenko
1) NTU "KhPI", Frunze street, 21, Kharkov, 61002, Ukraine, e-mail: s_semenov@ukr.net. 2) NTU "KhPI", Frunze street, 21, Kharkov, 61002, Ukraine, e-mail: gavrilenko@mail.ua.

Abstract: In this paper we propose to use the mathematical apparatus of statistical analysis based on the BDS tests to identify the state of the computer system under the effect of computer viruses.

Key-words: BDS-statistics, computer security, computer virus, the CPU load indicator, mathematical model.

Pages from: 400 to: 405

Language of the report: russian

INFORMATION CHECKING METHODS IN DIGITAL COMPONENTS OF COMPUTER SYSTEMS

1) Julia Drozd 2) Alex Drozd 3) Mohammed Al–dhabi
1) ONPU, 65 044 Украина, г. Одесса, пр. Шевченко, 1 e-mail: dea_lucis@ukr.net, 2) ONPU, 65 044 Украина, г. Одесса, пр. Шевченко, 1 e-mail: drozd@ukr.net, 3) ONPU, 65 044 Украина, г. Одесса, пр. Шевченко, 1 e-mail: aldhabi@mail.ru

Abstract: Information checking methods as a part of the digital components of computer systems are considered. Their feature is processing of results of the measurements which are approximate data and their representation by exact binary codes. It defines the complex way of development of the checking methods of information and the ideas in them. The development of the data model shows a low reliability of methods with traditionally high probability of error detection. The ways for increasing of the methods reliability based on distinction of essential and inessential errors are shown. A development of the scan checking for multithreaded systems of digit-by-digit pipelines is offered

Key-words: information checking methods, computer system, digital component, on-line testing, model of exact and approximate data, reliability of methods, scan checking.

Pages from: 406 to: 411

Language of the report: russian

Improved method for estimating of the parameters of the signals radiated by passive components of local area networks

1) Mikhail Prokofiev
1) NTU Ukraine "KPI", SIC "TESIS", 03056 Ukraine, Kyiv, Pobedy av., 37, e-mail: pmi@tesis.kiev.ua

Abstract: Estimation of the parameters of signals emitted by the passive components (cable channels) of local area networks takes special position in solving problems of electromagnetic compatibility tasks and certification. The improved method presented here provides the use of harmonic signal as a test one which oscillation frequency is determined by the results of spectral analysis of the signal data to the LAN and in the frequency band the network will operates. The starting oscillation frequency of the test signal (1 MHz) is the same for all cable channels and its limit frequency depends on the class of the cable channel. This method allows evaluating the results from the tests independently of the coding methods and comparing the test results of the products from different manufacturers.

Key-words: electromagnetic compatibility, test signal, cable channel, signals parameters estimation

Pages from: 412 to: 415

Language of the report: russian

MICROPROCESSOR BASED SYSTEM FOR CONTROL AND MONITORING OF TECHNOLOGICAL OBJECTS BASED ON A SINGLE-CHIP MICROCOMPUTER

1) Totyo Iliev
1) TU-Gabrovo, Gabrovo, 4 Hadzhi Dimitar Str. totyo_iliev@abv.bg

Abstract: Diagnostics of electrical machines is an important stage in the process of their exploitation. The determination of any malfunction entails certain difficulties. The use of modern tools based on single-chip computers allows a fast and accurate identification of the malfunction, thus avoiding the wrong operation of the machine. Diagnostics specifies the problem and preserves the machine in good condition. Longtime observations show that electrical failures represent the largest part of all malfunctions. Therefore, their diagnostics is a particularly important task

Key-words: measurement, diagnostics, electric machines

Pages from: 416 to: 419

Language of the report: bulgarian

IDENTIFICATION OF PULSED SIGNALS BASED ON NEURAL NETWORK TECHNOLOGY

1) Sergey Babak 2) Vladimir Eremenko
1) UET, 28 Engineering lane., Kyiv, 03068 Ukraine,e-mail: sergii.babak@gmail.com, 2) NAU, 1 Komarova Ave., Kyiv, 03068 Ukraine, e-mail: nau_307@ukr.net

Abstract: Methods used to identify monopulse signals and signals with a locally concentrated parameters are analyzed. One way of solving this problem of identification of these types of signals is the use of specialized information-measuring systems with neural network classifiers. We describe the algorithm of work and the structure of the developed modified neural network ART-2. The advantages of the modified network are shown for solving problems of identification of pulsed signals.

Key-words: monopulse signals, the signals with locally concentrated signs, informative signs, neural network, clusters, fragmentation of signal.

Pages from: 420 to: 425

Language of the report: russian

STUDY OF PROBLEMS OF MOBILE COMMUNICATIONS IN GSM AND UMTS IN MOVING VEHICLES AT HIGH SPEED

1) Kyrylo Halchenko 2) Valeriy Bezruk 3) Alexander Bybka
1) KhNUR, 61166 Ukraine, Kharkov, Lenin Ave., 14 e-mail: galchenkokirill@gmail.com, 2) KhNUR, 61166 Ukraine, Kharkov, Lenin Ave., 14 e-mail: bbk321@gmail.com 3) KhNUR, 61166 Ukraine, Kharkov, Lenin Ave., 14 e-mail: valeriy_bezruk@ukr.net

Abstract: The paper deals with methods of overcoming technical limitations restricting the speed of the connection object. Various versions of building of technical means in using geoinformation services and active communication in the railway transport are dscribed. The latter strategy allows to provide a guaranteed and fast switching between cells of the mobile network, including underground areas.

Key-words: mobile communication, GSM, UMTS, A-GPS, handover, network monitoring

Pages from: 426 to: 429

Language of the report: russian

METHOD OF PROCESSING VECTOR IMAGES WITH PROVIDING A COPYRIGHT PROTECTION

1) Vasyl Karpinets 2) Yuriy Yaremchuk
1) Vinnytsia NTU, 95 Khmelnytske shose, Vinnytsia, Ukraine, 21021, e-mail: karpinets@gmail.com, 2) Vinnytsia NTU, 95 Khmelnytske shose, Vinnytsia, Ukraine, 21021, e-mail: yurevyar@vntu.net

Abstract: This paper presents a method of processing vector images that protects their copyright with digital watermarks that reduces the effect of their integration on the image quality. A feature of this method is that the use in it of a two-dimensional discrete cosine transform and an embedded watermark bit by minor alterations in its high-frequency coefficients allows a decrease in the level of distortion of the image due to the inserted watermark compared to known methods.

Key-words: steganography, digital watermark, copyright protection, vector image, image processing.

Pages from: 430 to: 435

Language of the report: russian

AUGMENTED REALITY FOR VISUALIZATION IN PHYSICAL FIELD MEASUREMENTS

1) Valentin Mateev
1) Technical University of Sofia, Sofia 1756, 8 Kliment Ohridski blvd., e-mail: vmateev@tu-sofia.bg

Abstract: In this work a computer aided system for augmented reality generation is presented. The system is applicable for advanced field data visualization activities such as non-destructive testing and examination; industrial testing and inspection; biomagnetics; education, etc. This system makes possible combination of different data sources in one virtual reality world that can be used for simultaneous dynamic visualization. This type of integrated visualization systems allows engineering problems to be visualized and analyzed more effectively and to acquire closer interaction in the process with the observer.

Key-words: augmented reality, visualization, field measurements

Pages from: 436 to: 439

Language of the report: english

Design of Discrete Stereo TV System on FPGA for Determining Dynamic Objects Parameters in Real Time

1) Spirov Rosen 2) Grancharova Neli 3) Angelov Georgi
1) TU-Varna, 9010, Studentska str1, e-mail, rspirov@tu-varna.bg 2) TU-Varna, 9010, Studentska str1, e-mail nelly2000@abv.bg 3) TU-Varna, 9010, Studentska str1, e-mail valeddy00@abv.bg

Abstract: The article presents the design of a stereo TV measuring system for tracking of dynamic objects with accurate positioning and real-time based on FPGA. The article emphasized on the characteristics of the visual system of man and the possibility of building a stereo system, processing , identification and tracking of dynamic objects.

Key-words: FPGA, EVS, Image Processing,Stereovision, TV, Robots

Pages from: 440 to: 445

Language of the report: bulgarian

DIGITAL TV STEREO SYSTEM MONITORING OPENING TIME PROJECTS

1) Spirov Rosen 2) Grancharova Neli 3) Angelov Georgi
1) TU-Varna, 9010, Studentska str1, e-mail, rspirov@tu-varna.bg 2) TU-Varna, 9010, Studentska str1, e-mail nelly2000@abv.bg 3) TU-Varna, 9010, Studentska str1, e-mail valeddy00@abv.bg

Abstract: The paper presents the implementation of the TV system for measurement. TV tracking system can determine the parameters of the relative motion of various objects. Introducing the feedback it can easily become automatic control and driving system

Key-words: FPGA, EVS, Image Processing,Stereovision, TV, Robots

Pages from: 446 to: 452

Language of the report: bulgarian

ANALYTICAL INFORMATION SYSTEM FOR RECORDING OF ENERGY RESOURCE CONSUMPTION AND MANAGEMENT OF ENERGY SAVINGS IN BUDGETARY ECONOMIC SECTORS: DESIGN STRATEGIES AND OPERATION EXPERIENCE

1) Alexander Klimenko 2) Alexander Bobryakov 3) Elena Tikhonova 4) Alexey Stefantsov 5) Margarita Pokrovskaya
1) NRU "MPEI", 14 Krasnokazarmennaya Str., Moscow, 111250 Russia 2) NRU "MPEI", 14 Krasnokazarmennaya Str., Moscow, 111250 Russia 3) NRU "MPEI", 14 Krasnokazarmennaya Str., Moscow, 111250 Russia 4) NRU "MPEI", 14 Krasnokazarmennaya Str., Moscow, 111250 Russia 5) NRU "MPEI", 14 Krasnokazarmennaya Str., Moscow, 111250 Russia

Abstract: Methodological and informational support of recording of processes for energy resource consumption by the network of subordinate authorities and management of energy savings based on the example of the Ministry of Education and Science of the Russian Federation is described. The architecture of a distributed, specialized analytical information system which collects, processes, and analyzes information, as well as supports decisions to take energy-saving measures is considered. The software and hardware tools for the functional subsystem at the level of subordinate authorities are described. These tools easily enable the system to be adapted to solve various information-collecting operational tasks from the measuring units and facility energy management.

Key-words: Analytical information system, software and hardware tools, parameters of energy consumption, collecting and processing of measuring results, energy-saving measures, decision-making support system

Pages from: 453 to: 459

Language of the report: russian

ASSESSMENT OF THE STATE OF HYDRO- AERODYNAMICS PROCESSES DURING THE REENGINEERING OF ELEMENTS OF POWER MACHINES

1) Elena Arsiriy 2) Vasyl Arsiry 3) Marina Yadrova 4) Svetlana Antoshchuk
1) ONPU, 1, Shevchenko avenue, Odessa, Ukraine, 65044, e-mail: e.arsiriy@gmail.com 2) OSACE, 4 Didrihsona st., Odessa, 65029, Ukraine, e-mail: arsiry@te.net.ua 3) ONPU, 1, Shevchenko avenue, Odessa, Ukraine, 65044, e-mail: marinaonpu@yandex.ua 4) ONPU, 1, Shevchenko avenue, Odessa, Ukraine, 65044, e-mail: svetlana_onpu@mail.ru,

Abstract: Assessment of the hydro- aerodynamics processes in elements of power units for the purpose of reengineering is proposed to carry out with the help of complex simulations. Formalized scenario of complex modeling of the hydro- aerodynamics processes allows synthesize a modified prototype of an auxiliary power unit element via reduction of the hydroaerodynamics resistance.

Key-words: Simulation of power equipment parameters, assessment of the hydro- aerodynamics processes, reengineering of power equipment.

Pages from: 460 to: 465

Language of the report: russian

EXPERIMENTAL STUDY ON USE OF MEDICAL INFORMATION SYSTEMS IN BULGARIAN MEDICAL PRACTICE

1) Polina Mihova 2) Any Iolova
1) NBU, 1618, Sofia, Montevideo str 21, pmihova@nbu.bg 2) Resbiomed Ltd, Sofia, Pozitano 136A, anichirina@abv.bg

Abstract: Medical information systems become more and more popular in Bulgarian medical practice today. Nevertheless, one of the underappreciated but critical factors for slow and difficult adoption in medical sphere are the improper user interfaces which are confusing to navigate and disruptive to the physician’s standard workflow. The interface must permit a physician to record the minutiae of a patient’s condition while at the same time preserving the physician’s overview of a patient’s record so that any aspect of the patient’s health can be effortlessly queried and inspected. This paper aims to present deep analysis of HER in Bulgaria, based on е-finding inquiry, developed with Google tools from 15 medical centers and hospitals in Bulgaria, namely: Eye Clinic RESBIOMED, PLEVEN Military Medical Academy Neurology, PLOVDIV MHAT St.Geogri Clinic of Neurology end etc..

Key-words: user interface design, data visualization, usability, medical chart.

Pages from: 466 to: 470

Language of the report: bulgarian

Development and introduction of the automated system of planning and registering of verification and calibration activity

1) O. Dovydenko. 2) Yu. Kartashev 3) A. Samoylenko
1) CAI N.E. Zhukovsky, 1 Zhukovsky Street, TsAGI, Zhukovsky, Moscow Region, 140180, Russian Federation 2) CAI N.E. Zhukovsky, 1 Zhukovsky Street, TsAGI, Zhukovsky, Moscow Region, 140180, Russian Federation 3) CAI N.E. Zhukovsky, 1 Zhukovsky Street, TsAGI, Zhukovsky, Moscow Region, 140180, Russian Federation

Abstract: In the report questions of development and introduction of an automated system of planning and registering of verification and calibration activity are considered. The main advantages of the modifed version, the results of testing by its potential users, the actions for equipment of the workplaces for calibration and registering, the supervision groups and the results from its introduction are outlined.

Key-words: Quality management, planning, calibration, verification

Pages from: 473 to: 477

Language of the report: russian

Development of Methodology of Coordinate Measurements of Taper Screw Thread Gages

1) Igor Vasilyevich Surkov 2) Elena Aleksandrovna Surkova 3) Anastasiya Igorevna Burtovaya 4) Irina Sergeyevna Mastrikova
1) CJSC ChelyabNIIkontrol, 38 Sverdlovskiy trakt, Chelyabinsk, Russia, 454008, e-mail: suiv@toolmaker.ru, Web: www.toolmaker.ru 2) Chelyabinsk Screw Gauge Plant LLC, 28a Sverdlovskiy trakt, Chelyabinsk, Russia, 454008, e-mail: nii@toolmaker.ru, Web: www.toolmaker.ru 3) CJSC ChelyabNIIkontrol, 38 Sverdlovskiy trakt, Chelyabinsk, Russia, 454008, e-mail: nii@toolmaker.ru, Web: www.toolmaker.ru 4) CJSC ChelyabNIIkontrol, 38 Sverdlovskiy trakt, Chelyabinsk, Russia, 454008, e-mail: nii@toolmaker.ru, Web: www.toolmaker.ru

Abstract: This paper gives a description of the developed methodology and software for coordinate measurement of geometrical parameters of taper screw thread gauges. Typical strategies of measurements on universal and purpose-designed coordinate measuring instruments, machines and systems as well as special aspects of dimensional and accuracy analysis of coordinate measurement results, are described.

Key-words: coordinate measurement instruments, machines and systems, coordinate measurement software, inspection of geometrical parameters of taper screw thread gages

Pages from: 478 to: 486

Language of the report: russian

High-accurate measurements of parallel end gauges using linear laser interferometer

1) Z.V. Fomkina
1) VNIIM, Russia, 190005, St.-Petersburg, Moskovsky pr., 19, е-mail: z.v.fomkina@vniim.ru

Abstract: The short overview of interferometric methods of measurements of parallel end gauges with their limitations is given. The way to avoid these limitations by using the special set for measurements of parallel end gauges developed in VNIIM is described. The set description, structure, and the general results of the research using the State Primary Standard of the unit of length – meter GET 2-2010 are represented.

Key-words: interferometric method of measurements, parallel end gauges, glass plates, wringing layer, wringing layer thickness, gauge block, set for measurements of parallel end gauges, State Primary Standard of the unit of length – meter.

Pages from: 487 to: 490

Language of the report: russian

RESEARCH ON THE TEMPERATURE INFLUENCE ON LENGTH GAUGE BLOCKS MEASUREMENT

1) Nevena Radoeva
1) „Professor Cvetan Lazarov” DI, 2 “Professor Cvetan Lazarov” Blvd., 1592 Sofia, Bulgaria e-mail: n.radoeva@di.mod.bg

Abstract: A measuring experiment is carried out – calibration of length gauge blocks (PPKMD) with a nominal size of 50 mm. Series of tests are conducted where substantial changes have been made related to the temperature during measurements. An analysis of the results obtained by applying the methods of statistics is performed. The experiment is a part of a study that aims to analyze the input factors influencing the measuring process.

Key-words: gauge blocks length measures, uncertainty, uncertainty budget

Pages from: 491 to: 496

Language of the report: bulgarian

A METHOD FOR DETERMINING THE DEVIATION FROM THE STRAIGHT RADIAL MOVEMENT OF THE SLIDE OF A VERTICAL LATHE AND THE PERPENDICULARITY OF THIS MOVEMENT TO THE AXIS OF ROTATION OF THE FACE PLATE

1) Hristo Radev 2) Ivailo Blagov 3) Milko Djambazov
1) TU of Sofia, e-mail: hradev@tu-sofia.bg 2) TU of Sofia, e-mail: blagov@tu-sofia.bg 3) TU of Sofia, e-mail: milkodjambazov@gmail.com

Abstract: This article discusses some methods for determining the deviation from the straight radial movement of the slide of a vertical lathe, as well as the deviation from the perpendicularity of this movement to the axis of rotation of the face plate. Methodologies are approved in a real factory, having confirmed their functional and metrological capabilities.

Key-words: straightness, perpendicularity, vertical turret lathe

Pages from: 497 to: 502

Language of the report: bulgarian

A METHODOLOGY FOR THE ROUNDNESS CALIBRATION OF THE JOURNAL OF LARGE SHAFTS

1) Hristo Radev 2) Velizar Vassilev
1) Technical University of Sofia, e-mail: hradev@tu-sofia.bg 2) Technical University of Sofia, e-mail: vassilev_v@tu-sofia.bg

Abstract: This paper discusses a method for the roundness calibration of the journal of large shafts. The calibration is performed directly on the processing machine by the simultaneous measurement of the deviation from roundness of the journal as well as of a standard ring, which has a pre-calibrated roundness deviation and which is attached to the closest face of the shaft's journal.

Key-words: roundness deviation, large-size shafts, calibration

Pages from: 503 to: 507

Language of the report: bulgarian

CALIBRATION OF MEASUREMNT INSTRUMENTS USED IN CHEMISTRY- PROBLEMS AND A GOOD LABORATORY PRACTICE

1) Vessela Konstantinova 2) Anjela Kunova 3) Diana Priboiska 4) Galya Stoyanova 5) Dimka Ivanova
1) UMB, Sofia 1000, 108 G.S. Rakovski, str. e-mail: vrkonstantinova@hotmail.com 2) BIM, GD NCM, Sofia, 1040, D-r G. Dimitrov, 52-B, bul., e-mail: a.kunova@bim.government.bg, www.bim.government.bg 3) LETT “Aquaterratest”, Sofia 1574,23, Slatinska,str., e-mail: aquaterratest @abv.bg 4) LETT “Aquaterratest”, Sofia 1574,23, Slatinska,str., e-mail: aquaterratest @abv.bg 5) UMB, Sofia 1000, 108 G.S. Rakovski, str. e-mail: dimka_st_ivanova@yahoo.com

Abstract: This paper presents a classification of the measurement methods used in analytical chemistry according to some international guidelines and it discusses the relationship between content of the concept “measurement” and “calibration”. It considers a few spectrophotometer calibration practices on the basis of the CRM by relative calibration method and the effects of some influence factors on the calibration curve. The conclusions are made on the basis of the obtained experimental results.

Key-words: calibration, measuring system, relative calibration method, calibration curve, reference material, spectrophotometer, absorbance, internal spectral transmittance, optical filter

Pages from: 508 to: 516

Language of the report: bulgarian

Methods and possibilities to ensure the quality of results in the field of chemical measurements

1) Dimka Ivanova 2) Vessela Konstantinova
1) UMB, Sofia 100, 108 G.S. Rakovski, str, e-mail: dimka_st_ivanova@yahoo.com 2) UMB, Sofia 100, 108 G.S. Rakovski, str, e-mail: vrkonstantinova@hotmail.com,

Abstract: The ensuring of the quality of measurement results in the field of chemical analysis is based on a set of actions that the laboratories should apply. The report considers the possibilities and the ways to ensure the quality of the results of measurements obtained in chemical analysis. These methods are in connection to the requirements of BDS EN ISO/IEC 17025 and with good metrological practices recommended by competent organizations such as EURACHEM * and Technical Committee EURAMET ** - Metrology in Chemistry.

Key-words: measurement results, metrology in chemistry, quality control, interlaboratory comparisons, fitness testing

Pages from: 517 to: 523

Language of the report: bulgarian

CERTIFIED REFERENCE MATERIALS FOR pH – A MEANS FOR ENSURING OF INTERNATIONALLY RECOGNIZED METROLOGICAL TRACEABILITY OF MEASUREMENT IN CHEMICAL LABORATORIES

1) Dimka Ivanova 2) Ludmila Dimitrova
1) UMB, Sofia 1000, 108 G.S. Rakovski, str. e-mail: dimka_st_ivanova@yahoo.com 2) BIM, Sofia 1040, Bulv. „G.M.Dimitrov” 52Б, e-mail:l.dimitrova@bim.government.bg

Abstract: The measurement of pH is one of the most frequently measured parameters in chemical analytical laboratories. It determines the proper conduct of chemical analyzes and accordingly reliability of the results obtained. To ensure accurate and correct measurement of pH the necessary measuring devices, pH –metеrs, has to be calibrated regularly by using Certified Reference Materials (CRMs) for pH.

Key-words: Certified reference material, metrological traceability, characterization and certification of CRM, National standard for pH

Pages from: 524 to: 531

Language of the report: bulgarian

Procedure for metrological verification of spectrum analyzer ANRITSU

1) Marieta Marinova 2) Kiril Banev 3) Ognjan Dimitrov
1) NPP Kozloduy”, e-mail: mgmarinova@npp.bg 2) NPP Kozloduy”, e-mail: kbanev@npp.bg 3) ATSA”, Laboratory for Calibration, e-mail ognjan.dimitrov@bulatsa.com

Abstract: The report presents a methodology for metrological verification of spectrum analyzers and determining the spectral components of the signal. A brief description of verification operations and measuring devices is suggested. The processing the results of verification is explained.

Key-words: Methodology for metrological verification, spectrum analyzer, Anritsu, frequency range

Pages from: 532 to: 536

Language of the report: bulgarian

Metrological assurance in the radiation control in Radiation controlled Area of Kozloduy NPP Plc

1) S. Abrasheva
1) Kozloduy NPP Plc., e-mail: SDAbrasheva@npp.bg

Abstract: The radiation control in the Radiation Controlled Area of Kozloduy NPP is implemented by the Centralized Radiation Monitoring System – CRMS-01. The metrological assurance in the radiation protection area for measuring ionizing radiation is provided by the Ionizing Radiation Measuring Laboratory, at the Metrological Support Department of Kozloduy NPP. The report is based on the experience accumulated by the Ionizing Radiation Measuring Laboratory.

Key-words: metrological supervision, metrological inspection, radiation control, radiation controlled area

Pages from: 537 to: 541

Language of the report: bulgarian

Metrology Assurance of determining Gross Alpha and Beta Activity in Kozloduy NPP Plc .

1) N. Ivanova
1) Kozloduy NPP, e-mail: nsivanova2@npp.bg

Abstract: The main goals of metrological assurance in determining gross alpha and beta activity in Kozloduy NPP Plc. have been presented. The relevant activities, performed to achieve expected high quality of measurements in this area and their compliance with national and international regulations have been described. This report is based on the long experience of “Ionizing Radiation Measurements” Laboratory at the Department of Metrology.

Key-words: metrology assurance, metrology, calibration, verification.

Pages from: 542 to: 548

Language of the report: bulgarian

CALIBRATION OF GAMMA-RAY BEAMS (DOSIMETRIC TEST RIGS) - PART II

1) Nikolay Nikolov
1) KOZLODUY NPP PLC, 3320 Kozloduy, E-mail: npnikolov@npp.bg

Abstract: A designed software programme based on the calibration methodology of gamma-ray lines is presented. It is used for lines operation automation.

Key-words: calibration methodology, standard, working standard, gamma-ray beam, measuring means, software

Pages from: 549 to: 553

Language of the report: bulgarian

MEASUREMENT AND ANALYSIS OF RESULTS OF ELECTROMAGNETIC FIELDS ON THE TERRITORY OF NBU

1) Anushka Stancheva 2) Plamen Tzvetkov 3) Nikola Petkov
1) NBU, Sofia, 21 Montevideo blvd., 2) TU-Sofia, Sofia, 8 Kl. Ohridski blvd. 3) NBU, Sofia, 21 Montevideo blvd.,

Abstract: This work describes the elements of the process of measuring electromagnetic fields and results from evaluation of the cumulative level of electromagnetic fields under national norms, conducted within the New Bulgarian University (NBU). The device SRM-3006 of company NARDA is used, equipped with a set of isotropic broadband antennas. The data obtained show that the measured levels of electromagnetic fields are safe, according to national legislation.

Key-words: electromagnetic field, a specific power density, intensity of the electric field, intensity of the magnetic field

Pages from: 554 to: 560

Language of the report: bulgarian

ANALYSIS OF THE NEW NATIONAL ANNEX BDS EN 206/NA:2015 AND THE CHANGED REQUIREMENTS FOR CLASSIFICATION, COMPOSITION, CONTROL AND USAGE OF CONCRETE IN BULGARIA

1) Valeriy Naidenov 2) Ivan Rostovsky
1) Institute of mechanics - BAS, Sofia, Georgi Bonchev str, block 1, valna53@mail.bg, www.imbm.bas.bg 2) UACEG, Sofia, 1Hristo Smirnenski blv., i_rostovsky@abv.bg, www.uasg.bg

Abstract: The new national annex BDS EN 206/NA:2015, valid since April 2015, is the basic document for production, classification, composition, control and verification of the properties and usage of concrete in the construction practice in Bulgaria. The significant changes in the new document are analyzed in the report. They are related to the field of application of the concrete, additional classification and requirements for ingredients and composition of the concrete. It is emphasized on the new aspects in terms of control and compliance with criteria of concrete in terms of the basic technical characteristics. The new moments related to sampling, production control, delivery and others are of great importance for the construction process. The conclusions are formulated for the advantage of the implementation of the new document and its disciplining effect on the concrete production in Bulgaria.

Key-words: concrete, classification of concrete, ingredients, fresh concrete, hardened concrete, limiting values for the composition and the properties, conformity criteria, production control

Pages from: 561 to: 566

Language of the report: bulgarian

Lean manufacturing applying for increasing the efficiency of discrete electronic production in the condition of Total Quality Managing

1) Dipl. Eng. Valentin Petrov Tsenev
1) “UniPOS” Ltd, Pleven, “San Stefano Street” 47, e-mail: valio@unipos-bg.net

Abstract: The report presents a certain example of using lean manufacturing for increasing the efficiency of production in TQM. The approach, the application and the final results of TQM lean manufacturing are shown.

Key-words: lean manufacturing, production cyclical time, conveyor, quality.

Pages from: 567 to: 570

Language of the report: bulgarian

Engineering technologies in sports – a new specialization for students in master ‘s degree of education at National Sports Academy „Vasil Levski “

1) Vihren Bachev 2) Orlin Groshev 3) Pavel Yordanov 4) Boyan Zlatev
1) NСA „Vasil Levski”, Students town, Sofia 1700 e-mail, batchevv@yahoo.com 2) NСA „Vasil Levski”, Students town, Sofia 1700 e-mail, orlin_groshev@mail.bg; 3) NСA „Vasil Levski”, Students town, Sofia 1700 e-mail, yordanov77@gmail.com 4) NСA „Vasil Levski”, Students town, Sofia 1700 e-mail, boyanzlatev@abv.bg

Abstract: The aim of the study is to present the idea, structure and content of the new specialization, included in the educational plan for 2015 of master‘s students at National Sports Academy „Vasil Levski“ - „Sports for High Achievements“ (SHA). The contemporary management and realization of competition and coaching activities in sports is more and more connected to and requiring the application of the latest engineering technologies. The development of modern sport depends mainly on application of engineering technologies. In the educational plan special modules, related to metrology and standardization are included. Some of these are: „Metrological basis, standards and patents for implementing IT in the specialization SHA“; “IT for registration and analyses of physical values in the specialization SHA“; „IT for registration and analyses of sports achievements, events and activities in SHA“; „ IT and standards for sports equipment and sport facilities“ and other. Thus we make an attempt to show the necessity (importance) of the new specialization „Engineering technologies in sports“ for students in master‘s degree of education at National Sports Academy

Key-words: Engineering technology in sport, metrology, master‘s degree of education

Pages from: 571 to: 576

Language of the report: bulgarian

Metrology in the educational and research process of students in bachelor 's degree of education in the National Sports Academy "Vasil Levski "

1) Vihren Bachev 2) Orlin Groshev 3) Pavel Yordanov 4) Boyan Zlatev
1) NSA "Vasil Levski”, Students town, Sofia 1700 e-mail: : batchevv@yahoo.com 2) NSA "Vasil Levski”, Students town, Sofia 1700 e-mail: orlin_groshev@mail.bg 3) NSA "Vasil Levski”, Students town, Sofia 1700 e-mail: yordanov77@gmail.com 4) NSA "Vasil Levski”, Students town, Sofia 1700 e-mail: boyanzlatev@abv.bg

Abstract: The aim of the theoretical study is to characterize the contemporary state of education of students in bachelor's degree of education in the National Sports Academy "Vasil Levski" in the field of metrology and metrology ensurance. An updated analysis of the methods and theory knowledge, taught in the course of lectures, contents of the books, the educational materials and the exam requirements is carried out. The processes of practical exercises as well as research activity and other significant activities in the field of comprehension of knowledge from the field of metrology are characterized. The necessity of competences, related to measurement and control in sports, physical education and kinesytherapy is proven as getting more and more important in the contemporary society.

Key-words: education, metrology, measurement, educational process

Pages from: 577 to: 584

Language of the report: bulgarian

DETERMINATION OF CHAINS OF IMPACT IN SELECTION OF NEW SERVICE IN THE AREA OF TECHNICAL MAINTENANCE OF MEDICAL DEVICES

1) Mladen Stefanov Velev 2) Elitsa Lyudmilova Tomova-Damyanova
1) TU-Sofia, 8 Sv. Kl. Ohridski Blv, 1000 Sofia, Bulgaria, e-mail: mvelev@tu-sofia.bg 2) TU-Sofia, 8 Sv. Kl. Ohridski Blv, 1000 Sofia, Bulgaria, e-mail: elitsa_tomova@tu-sofia.bg

Abstract: The paper presents a methodological approach, which aims in the context of the topic of quality management to develop successive steps for evaluation and choice of new services which being offered to the market lead service organizations to maximum business results. A particular emphasis is placed on the specifics of the services in the field of medical equipment and technical maintenance as a unifying factor of two seemingly contradictory in nature ideas: standardization of processes and personalized services. This role is created by the need to maintain a certain balance between the profit increase of service business and the social responsibility of organizations in the healthcare sector not only to develop a successful business, but to be in favor of humans and society.

Key-words: new services, strategies, medical equipment, technical maintenance, chains of impact, economic results

Pages from: 587 to: 592

Language of the report: bulgarian

PROCESSING AND ANALYSIS OF BIOMETRIC SIGNALS WITH PULSE AND BLOOD OXYGEN SATURATION MEASUREMENT SYSTEM

1) Georgi Shterev 2) Vasil Krystev
1) TU – Sofia, Branch Plovdiv, e-mail: g_shterev@tu-plovdiv.bg 2) ABB EAD, e-mail: vasil920326@gmail.com

Abstract: In the present article a developed software and hardware system for measurement of pulse and blood oxygen saturation based on an universal microcontroller is described. The system includes a measurement fingertip probe, analog amplifier, microcontroller (with control algorithm) and a personal computer to visualize the signals. An example software procedure in Matlab and experimental results from controller’s operation with a software written in C++ are provided.

Key-words: pulse measurement, blood oxygen saturation, data processing algorithm for microcontroller, graphical visualization on a personal computer, virtual instrument in LabVIEW environment

Pages from: 593 to: 598

Language of the report: bulgarian

RESEARCH ON STRAINS AND MECHANICAL STRESSES IN REINFORCED CONCRETE ELEMENTS SUBJECTED TO BENDING

1) Ivan Ivanchev 2) Veselin Slavchev 3) Veselka Ivancheva
1) University of Structural Engineering & Architecture(VSU) „Lyuben Karavelov“ - Sofia, iivanchev@mail.bg, www.vsu.bg 2) University of Structural Engineering & Architecture(VSU) „Lyuben Karavelov“ - Sofia, slavchev@vsu.bg, www.vsu.bg 3) Technical University of Sofia, Faculty of Automatics, vivancheva@tu-sofia.bg, www.tu-sofia.bg

Abstract: In this paper the experimental research studies performed to determine the strains and mechanical stresses in the concrete elements subjected to bending are described. The measurement uses strain gages. The results obtained are processed with Matlab.

Key-words: strains, mechanical stresses, reinforced concrete elements, strain gauges..

Pages from: 599 to: 603

Language of the report: bulgarian

Virtual laboratory exercise “Basic electricity laws”

1) Nikolay Gurov 2) Vladislav Slavov
1) Technical University - Sofia, 8 Kliment Ohridksi blvd, Sofia, Bulgaria e-mail: nrg@tu-sofia.bg 2) Technical University - Sofia, 8 Kliment Ohridksi blvd, Sofia, Bulgaria e-mail: vladi_s@abv.bg

Abstract: The article describes the virtual laboratory exercise „Basic electricity laws“ designed for first year students in the English Language faculty of Engineering, Technical University - Sofia, subject „Electrical engineerimg I“ from the curriculum. Virtual laboratory exercise was conducted in the envoirenment of LabVIEW and integrated in e-learning platform Moodle, which is conventionally used at the Technical University - Sofia. Performing the exercise, students get acquainted with the basic laws of electrical engineering practice. They can set different values of voltage and resistors in the selected scheme to verify whether and how to perform basic laws of electrical engineering with the resulting currents and voltages for all nodes and edges of the scheme. All this can be done at any time included the exercise of any place where there are available computer and internet connection.

Key-words: Distance learning, e-learning, LabVIEW, Moodle, virtual laboratory exercises, electrical engineering, basic laws

Pages from: 604 to: 609

Language of the report: bulgarian

Calibration of Energy Analyzer on Voltage and Current

1) Krasimir Galabov
1) Technical University - Sofia, Bul. „Kl. Ohridski „8, 1000 - Sofia, e-mail: k_galabov@tu-sofia.bg

Abstract: : This paper presents an approach, a sequence of operations and processing of results in calibration of energy analyzers. A mathematical model and calculation of the uncertainty of measurement results in the calibration are described. The material can be used as a basis for developing a procedure for calibration of energy analyzers. The principle possibility of developing a virtual automated system based on software product LabVIEW is discussed.

Key-words: energy analyzers, calibration a sequence of operations, uncertainty of result, processing of results, virtual automated system, LabVIEW.

Pages from: 610 to: 614

Language of the report: bulgarian

Research and analysis of network interface for connection to LONWORKS® platform

1) Ekaterina Gospodinova
1) TU of Sofia, 8 Kliment Ohridski, 1000 Sofia, Bulgaria, e-mail: ekaterina_bahneva@abv.bg

Abstract: The article examines and analyzes the work of the network interface SLTA. Automatic leveling systems are electronic measuring devices which enable accurate and remote reading and control of fuel. The information system can perform very high precision and continuous measurement of level and temperature and transmit data. IFSF is an international standard for automation based on Local Operating Network technology for the oil industry. LonWorks is a network platform, with special focus on management applications. SLTA allows any host processor with a serial interface EIA-232 to connect to the LonWorks network and its virtual version. The main opportunities and requirements to hardware and software and the modes of serial LonTalk adapter have been analyzed.

Key-words: protocol, host interface adapter, network, IP, TCP, SLTA, ETHLON

Pages from: 615 to: 619

Language of the report: bulgarian

Method for Assessment of the Consumption of Electrobus Using Load Profile of the Charging Stations

1) George Milushev 2) Kameliya Kirilova 3) Kaloyan Stanev
1) TU-Sofia, Faculyty of Automation, Department Electrical Measurement, Sofia, 8 Kliment Ohridski blvd, e-mail: gm@tu-sofia.bg 2) TU-Sofia, Faculyty of Automation, Department Electrical Measurement, Sofia, 8 Kliment Ohridski blvd, e-mail:kame_to@abv.bg 3) TU-Sofia, Faculyty of Automation, Department Electrical Measurement, Sofia, 8 Kliment Ohridski blvd, e-mail: kaloqn.stanev@yahoo.com

Abstract: A method for assessment and control of the electrical energy consumption of electrobus from the final charging stations of fixed route is presented. The method covers measurement of the electrical consumption, recording of voltages, currents and powers and load profiles. The results from the measurements are presented in a table for comparison with the declared by the producer specifications.

Key-words: analysis, energy, measurement, control

Pages from: 620 to: 625

Language of the report: bulgarian

REDUCTION OF MAGNETIC CORES USED FOR PRODUCTION OF “OPEN LOOP” CURRENT TRANSDUCERS

1) Kiril Evlogiev 2) George Milushev
1) TU - Sofia, str. St. Kliment Ohridski № 8, e-mail: kiril.evlogiev@yahoo.com 2) TU - Sofia, str. St. Kliment Ohridski № 8, e-mail: gm@tu-sofia.bg

Abstract: The purpose of the current experiment is investigation of the influence of different core gaps in open loop of Hall current transducers on the gain accuracy and linearity. These are the main properties of the current transducers and they had been measured.

Key-words: Transducer, current, Hall effect, holotron, metrological reliability, quality control.

Pages from: 626 to: 629

Language of the report: bulgarian