Pub Date : 2018-10-19DOI: 10.33955/2307-2180(5)2018.15-22
V. Balashov, A. Lashko, L. Liakhovetsky, Vasyl I. Oreshkov, V. Skurikhin
The work is devoted to the research of achievable data transmission rates by transmission systems using VDSL2 technology (VDSL2-systems) when working on multi-pair telephone cables of the PJSC «Ukrtelecom» network. The architecture of the modernized telecommunications network of the PJSC «Ukrtelecom» is considered. The results of the experimental research of the achievable transmission rate of the transmission systems using VDSL2 technology for multi-pair telephone cables after the access network of the PJSC «Ukrtelecom» modernization, taking into account the crosstalk that occurs during the parallel operation of the VDSL2-systems and the availability of the ADSL2+-systems working in the multi-pair cable, are provided. Analytical modeling of the VDSL2-systems operation taking into account the characteristics of the «Huawei» equipment and domestic telephone cables is performed. The method for calculating of the transmission rate of the VDSL2-systems has been corrected on the basis of the experiments and modeling results. Using the corrected method, the research of the VDSL2-systems transmission rate dependence on the length of the subscriber line, the load coefficient of the multi-pair cable by transmission systems and the external additive noises level is carried out. The recommendations on the implementation of the VDSL2 technology on the PJSC «Ukrtelecom» network based on the results of the research are given.
{"title":"Evaluation of the Efficiency of the VDSL2 Technology Implementation on the PJSC «Ukrtelecom» Network","authors":"V. Balashov, A. Lashko, L. Liakhovetsky, Vasyl I. Oreshkov, V. Skurikhin","doi":"10.33955/2307-2180(5)2018.15-22","DOIUrl":"https://doi.org/10.33955/2307-2180(5)2018.15-22","url":null,"abstract":"The work is devoted to the research of achievable data transmission rates by transmission systems using VDSL2 technology (VDSL2-systems) when working on multi-pair telephone cables of the PJSC «Ukrtelecom» network. The architecture of the modernized telecommunications network of the PJSC «Ukrtelecom» is considered. The results of the experimental research of the achievable transmission rate of the transmission systems using VDSL2 technology for multi-pair telephone cables after the access network of the PJSC «Ukrtelecom» modernization, taking into account the crosstalk that occurs during the parallel operation of the VDSL2-systems and the availability of the ADSL2+-systems working in the multi-pair cable, are provided. Analytical modeling of the VDSL2-systems operation taking into account the characteristics of the «Huawei» equipment and domestic telephone cables is performed. The method for calculating of the transmission rate of the VDSL2-systems has been corrected on the basis of the experiments and modeling results. Using the corrected method, the research of the VDSL2-systems transmission rate dependence on the length of the subscriber line, the load coefficient of the multi-pair cable by transmission systems and the external additive noises level is carried out. The recommendations on the implementation of the VDSL2 technology on the PJSC «Ukrtelecom» network based on the results of the research are given.","PeriodicalId":52864,"journal":{"name":"Metrologiia ta priladi","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44584574","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-10-19DOI: 10.33955/2307-2180(5)2018.31-35
Y. Serikov
Ensuring the reliability of buildings, structures, analysis of their structural elements during reconstruction or major repair includes the task of determining the physical and mechanical characteristics of materials — strength, homogeneity, evaluation of structural heterogeneity, the presence of microcracks, etc. In solving this problem, an ultrasonic pulse method of non-destructive quality control is used. The basis of the method is the dependence of the parameters of ultrasonic oscillations, on these characteristics when they pass through the material. As the main parameter of the information ultrasonic signal, the time of its passage from the radiating to the receiving ultrasonic transducers is used. The amplitude of the information ultrasonic signal to a large extent depends on the structure of the investigated material, its acoustic resistance. At significant violations of the structure of the material there is a significant decrease in the amplitude of the information signal, which causes an increase in the error of measuring the time of its passage, and hence the definition of characteristics, quality of the investigated material. The article describes the developed method of increasing the accuracy of measuring the time of passage of the ultrasonic signal from the radiating to the receiving ultrasonic transducers. The essence of the technique is to use the mathematical modeling of the shape of the ultrasound signal, in particular the form of its so-called «first introduction».
{"title":"Improvement of Accuracy of Control of Physical‑Mechanical Characteristics of Materials By Ultrasonic Pulse Method Due to Reduction of Measurement Error of Propagation Time of Elastic Waves","authors":"Y. Serikov","doi":"10.33955/2307-2180(5)2018.31-35","DOIUrl":"https://doi.org/10.33955/2307-2180(5)2018.31-35","url":null,"abstract":"Ensuring the reliability of buildings, structures, analysis of their structural elements during reconstruction or major repair includes the task of determining the physical and mechanical characteristics of materials — strength, homogeneity, evaluation of structural heterogeneity, the presence of microcracks, etc. In solving this problem, an ultrasonic pulse method of non-destructive quality control is used. The basis of the method is the dependence of the parameters of ultrasonic oscillations, on these characteristics when they pass through the material. As the main parameter of the information ultrasonic signal, the time of its passage from the radiating to the receiving ultrasonic transducers is used. The amplitude of the information ultrasonic signal to a large extent depends on the structure of the investigated material, its acoustic resistance. At significant violations of the structure of the material there is a significant decrease in the amplitude of the information signal, which causes an increase in the error of measuring the time of its passage, and hence the definition of characteristics, quality of the investigated material. \u0000The article describes the developed method of increasing the accuracy of measuring the time of passage of the ultrasonic signal from the radiating to the receiving ultrasonic transducers. The essence of the technique is to use the mathematical modeling of the shape of the ultrasound signal, in particular the form of its so-called «first introduction».","PeriodicalId":52864,"journal":{"name":"Metrologiia ta priladi","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44597141","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-10-19DOI: 10.33955/2307-2180(5)2018.47-49
V. Chalyy
The essence of the thought experiment and its use in metrology for evaluating and presenting measurement results are studied. An imaginary experiment has a hypothetical-deductive structure, carried out on the basis of the developed program, plan-scheme, is based on experience and is based on the real laws of the phenomena under study and does not go beyond the boundaries of empirical preconditions. The term «uncertainty» of measurement is considered in three aspects: quantitative knowledge of objects of the real world, the technical procedure for obtaining pragmatic measurement information, evaluation of the measured information for making informed decisions and risk management. An analyzed of the shortcomings of existing methods to assess the components of measurement uncertainty, based on the specific features of the GUM concept. In this concept, all components of measurement uncertainty are grouped abstractly into two categories - A and B without sufficient justification of the classification criteria. A method for classifying the components of uncertainty based on a real or mental experiment is proposed, and the results obtained are referred to as real (standard) uncertainty «and» imaginary (standard) uncertainty». The total uncertainty is considered as a complex value and is calculated on the basis of orthogonal vectors of the results of real and imaginary experiments. The proposed interpretation of the uncertainty of measurement gives a better understanding of the nature of uncertainty, simplifies entries and calculations.
{"title":"Mental Experiment in Metrology and Representation of Measurement Uncertainty in a Complex Form","authors":"V. Chalyy","doi":"10.33955/2307-2180(5)2018.47-49","DOIUrl":"https://doi.org/10.33955/2307-2180(5)2018.47-49","url":null,"abstract":"The essence of the thought experiment and its use in metrology for evaluating and presenting measurement results are studied. An imaginary experiment has a hypothetical-deductive structure, carried out on the basis of the developed program, plan-scheme, is based on experience and is based on the real laws of the phenomena under study and does not go beyond the boundaries of empirical preconditions. The term «uncertainty» of measurement is considered in three aspects: quantitative knowledge of objects of the real world, the technical procedure for obtaining pragmatic measurement information, evaluation of the measured information for making informed decisions and risk management. An analyzed of the shortcomings of existing methods to assess the components of measurement uncertainty, based on the specific features of the GUM concept. In this concept, all components of measurement uncertainty are grouped abstractly into two categories - A and B without sufficient justification of the classification criteria. A method for classifying the components of uncertainty based on a real or mental experiment is proposed, and the results obtained are referred to as real (standard) uncertainty «and» imaginary (standard) uncertainty». The total uncertainty is considered as a complex value and is calculated on the basis of orthogonal vectors of the results of real and imaginary experiments. The proposed interpretation of the uncertainty of measurement gives a better understanding of the nature of uncertainty, simplifies entries and calculations.","PeriodicalId":52864,"journal":{"name":"Metrologiia ta priladi","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41997729","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-10-19DOI: 10.33955/2307-2180(5)2018.61-66
М. Kalyniuk, R. Kozin
Literature review on methods of determination oxygen, hydrogen, nitrogen of content in germanium is given. Methods of determination oxygen, hydrogen, nitrogen of content in germanium: temperatures of degasation and analysis, mass of analytical samples, time of analysis, design of carbon crucibles ets, — are prepared.
{"title":"Analyze of Germanium on Content of the Oxygen, Hydrogen, Nitrogen Admixture","authors":"М. Kalyniuk, R. Kozin","doi":"10.33955/2307-2180(5)2018.61-66","DOIUrl":"https://doi.org/10.33955/2307-2180(5)2018.61-66","url":null,"abstract":"Literature review on methods of determination oxygen, hydrogen, nitrogen of content in germanium is given. \u0000Methods of determination oxygen, hydrogen, nitrogen of content in germanium: temperatures of degasation and analysis, mass of analytical samples, time of analysis, design of carbon crucibles ets, — are prepared.","PeriodicalId":52864,"journal":{"name":"Metrologiia ta priladi","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43265950","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-10-19DOI: 10.33955/2307-2180(5)2018.23-30
Y. Stentsel, K. Litvinov, T. Sotnikova, V. Lopatin
The article presents the research results of additional errors in measuring instruments caused by the change of normalized influential parameters. The analysis of modern methods of additional measurement errors determination is performed, and their disadvantages are shown. A new method for research and determination of additional errors is proposed, which is based on Euler’s optimality integral functional. Applicability of such measurement errors research by the integral functional method is substantiated, the essence of which is to determine the difference of planes with nominal and current static characteristics of the measuring instrument with further definition of the integral functional and measurement errors. The research results of additional measurement errors are presented for the case when the static characteristic of the measuring instrument is linear and fixed at the initial input signal. It is shown that for measuring instruments with the linear static characteristic the change of the influence parameter does not change the characteristic linearity, but only leads to nonlinearity of the additional measurement error with increase in deviation of the influence parameter from its normalized value. The mathematical models of additional measurement errors and their graphical distribution along the measurement range are presented.
{"title":"Research of Errors in Measuring Instruments with Fixed Ends of Measurement Range by Integral Functional Method","authors":"Y. Stentsel, K. Litvinov, T. Sotnikova, V. Lopatin","doi":"10.33955/2307-2180(5)2018.23-30","DOIUrl":"https://doi.org/10.33955/2307-2180(5)2018.23-30","url":null,"abstract":"The article presents the research results of additional errors in measuring instruments caused by the change of normalized influential parameters. The analysis of modern methods of additional measurement errors determination is performed, and their disadvantages are shown. A new method for research and determination of additional errors is proposed, which is based on Euler’s optimality integral functional. Applicability of such measurement errors research by the integral functional method is substantiated, the essence of which is to determine the difference of planes with nominal and current static characteristics of the measuring instrument with further definition of the integral functional and measurement errors. The research results of additional measurement errors are presented for the case when the static characteristic of the measuring instrument is linear and fixed at the initial input signal. It is shown that for measuring instruments with the linear static characteristic the change of the influence parameter does not change the characteristic linearity, but only leads to nonlinearity of the additional measurement error with increase in deviation of the influence parameter from its normalized value. The mathematical models of additional measurement errors and their graphical distribution along the measurement range are presented.","PeriodicalId":52864,"journal":{"name":"Metrologiia ta priladi","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48845259","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-10-19DOI: 10.33955/2307-2180(5)2018.36-39
V. Novikov, О. Nykytyuk
The comparative analysis of the requirements of the standards of DSTU ISO / IEC 17025: 2017 [1] and DSTU ISO / IEC 17025: 2005 [2] was carried out. According to the results of this analysis, the main regularities of the development of requirements for the laboratory management system are determined.
对DSTU ISO / IEC 17025: 2017[1]和DSTU ISO / IEC 17025: 2005[2]标准的要求进行了对比分析。根据分析结果，确定了实验室管理系统需求发展的主要规律。
{"title":"Analysis of the requirements of the new version of the standard DSTU ISO / IEC 17025: 2017","authors":"V. Novikov, О. Nykytyuk","doi":"10.33955/2307-2180(5)2018.36-39","DOIUrl":"https://doi.org/10.33955/2307-2180(5)2018.36-39","url":null,"abstract":"The comparative analysis of the requirements of the standards of DSTU ISO / IEC 17025: 2017 [1] and DSTU ISO / IEC 17025: 2005 [2] was carried out. According to the results of this analysis, the main regularities of the development of requirements for the laboratory management system are determined.","PeriodicalId":52864,"journal":{"name":"Metrologiia ta priladi","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43128049","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-10-19DOI: 10.33955/2307-2180(5)2018.11-14
P. Shchapov, R. Mygushchenko, O. Kropachek, I. Korzhov
In the article investigations of probabilistic models of parametrization of local changes of non-stationary random metering signals are carried out. The formalization of the probabilistic properties of non-stationary random signals was carried out, the choice of research models was carried out, the influence of the effects of spectral non-stationary on the correlation of the harmonic components of the measurement signals was analyzed, the time-frequency auto-coherence models were obtained and investigated; discrete continuous wavelet transforms were used to increase the efficiency of the control (diagnosis) of spectral changes measuring signal in mathematical expectations of mutual spectral correlation. The research is carried out to solve the scientific and practical problem of imperfection and limitations of theoretical substantiation in the creation of computerized information measuring devices for monitoring and diagnosing dynamic objects locally and globally unsteady in their spectral properties.
{"title":"Investigation of correlation models of spectral nonstationarity of random signals","authors":"P. Shchapov, R. Mygushchenko, O. Kropachek, I. Korzhov","doi":"10.33955/2307-2180(5)2018.11-14","DOIUrl":"https://doi.org/10.33955/2307-2180(5)2018.11-14","url":null,"abstract":"In the article investigations of probabilistic models of parametrization of local changes of non-stationary random metering signals are carried out. The formalization of the probabilistic properties of non-stationary random signals was carried out, the choice of research models was carried out, the influence of the effects of spectral non-stationary on the correlation of the harmonic components of the measurement signals was analyzed, the time-frequency auto-coherence models were obtained and investigated; discrete continuous wavelet transforms were used to increase the efficiency of the control (diagnosis) of spectral changes measuring signal in mathematical expectations of mutual spectral correlation. The research is carried out to solve the scientific and practical problem of imperfection and limitations of theoretical substantiation in the creation of computerized information measuring devices for monitoring and diagnosing dynamic objects locally and globally unsteady in their spectral properties.","PeriodicalId":52864,"journal":{"name":"Metrologiia ta priladi","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42130487","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-10-19DOI: 10.33955/2307-2180(5)2018.3-10
O. Velychko, T. Gordienko
The article presents the results of research of existing methods for conducting group expert assessment. The method of group expert assessment taking into account the competence of the experts involved on the basis of previously established criteria was used. A group expert evaluation of the state of metrological assurance for ten types of measurement was carried out. Results are processed used of specialized and universal software. A comparative analysis of the results obtained to assess the suitability of the methods was conducted. The primary issues are metrological assurance for measurements of electrical quantities and the measurement of time and frequency for further in-depth study.
{"title":"Generalized Comparison of the Results of the Group Expert Assessment for the State of Metrological Assurance of Measurements","authors":"O. Velychko, T. Gordienko","doi":"10.33955/2307-2180(5)2018.3-10","DOIUrl":"https://doi.org/10.33955/2307-2180(5)2018.3-10","url":null,"abstract":"The article presents the results of research of existing methods for conducting group expert assessment. The method of group expert assessment taking into account the competence of the experts involved on the basis of previously established criteria was used. A group expert evaluation of the state of metrological assurance for ten types of measurement was carried out. Results are processed used of specialized and universal software. A comparative analysis of the results obtained to assess the suitability of the methods was conducted. The primary issues are metrological assurance for measurements of electrical quantities and the measurement of time and frequency for further in-depth study.","PeriodicalId":52864,"journal":{"name":"Metrologiia ta priladi","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45485588","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-10-19DOI: 10.33955/2307-2180(5)2018.56-60
G. Kononenko
The article deals with the principles of the light and urbandesign, its main stages and regulatory action mechanisms. It is emphasized that with the help of the developed method of the light and urban designing it is possible to create comfortable urban spaces, which correspond to the person's scale and to be organically integrated into the macrostructure of the city.
{"title":"Role of the Light and Urban Design in Adjusting the Scale of Urban Spaces","authors":"G. Kononenko","doi":"10.33955/2307-2180(5)2018.56-60","DOIUrl":"https://doi.org/10.33955/2307-2180(5)2018.56-60","url":null,"abstract":"The article deals with the principles of the light and urbandesign, its main stages and regulatory action mechanisms. It is emphasized that with the help of the developed method of the light and urban designing it is possible to create comfortable urban spaces, which correspond to the person's scale and to be organically integrated into the macrostructure of the city.","PeriodicalId":52864,"journal":{"name":"Metrologiia ta priladi","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69565563","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-08-30DOI: 10.33955/2307-2180(4)2018.33-40
V. Yatsuk, R. Matviiv, Y. Yatsuk
It is shown that, it is expedient to use a DC voltage calibrator with automatic error correction by double switching inverting method and averaging the output voltage with a low frequency filter for operational monitoring and remote calibration of measuring channels was shown in this paper (Figre 1). A comparison of the dynamic and metrological characteristics of DC voltage calibrators with single- and two-period demodulation has been carried out and operator and time mathematical models have been proposed (Figure 2). Computer simulation of both structures of voltage calibrators in manual and automatic control modes was carried out. The results of experimental studies of a DC voltage calibrator model with single-phase demodulation and averaging by an active low frequency filter are described (Figure 3). Conclusions about the good convergence of experimental results with theoretical assumptions were made; the unadjusted value of the additive displacements in the manual control mode did not exceed ±1 μV. A certain frequency dependence of the additive displacements unadjusted value of the made model has been established and it is determined that its minimum value is at a frequency near 1.2 kHz. Conditions of practical realization of a DC voltage calibrator with automatic correction of additive displacements by the proposed method of switching inverting in the basis of programmable systems on a chip are discussed. Emphasized that in the future it will also adjust the multiplier and additional errors during the reproduction of DC voltage small values in working conditions. The scientific results, presented in this article, were obtained in the frame of research project number 0115U000446, 01.01.2015 - 31.12.2017, financially supported by the Ministry of Education and Science of Ukraine.
{"title":"Metrological Properties Analysis of Portable Dc Voltage Calibrator with Errors Correction","authors":"V. Yatsuk, R. Matviiv, Y. Yatsuk","doi":"10.33955/2307-2180(4)2018.33-40","DOIUrl":"https://doi.org/10.33955/2307-2180(4)2018.33-40","url":null,"abstract":"It is shown that, it is expedient to use a DC voltage calibrator with automatic error correction by double switching inverting method and averaging the output voltage with a low frequency filter for operational monitoring and remote calibration of measuring channels was shown in this paper (Figre 1). A comparison of the dynamic and metrological characteristics of DC voltage calibrators with single- and two-period demodulation has been carried out and operator and time mathematical models have been proposed (Figure 2). Computer simulation of both structures of voltage calibrators in manual and automatic control modes was carried out. The results of experimental studies of a DC voltage calibrator model with single-phase demodulation and averaging by an active low frequency filter are described (Figure 3). Conclusions about the good convergence of experimental results with theoretical assumptions were made; the unadjusted value of the additive displacements in the manual control mode did not exceed ±1 μV. A certain frequency dependence of the additive displacements unadjusted value of the made model has been established and it is determined that its minimum value is at a frequency near 1.2 kHz. Conditions of practical realization of a DC voltage calibrator with automatic correction of additive displacements by the proposed method of switching inverting in the basis of programmable systems on a chip are discussed. Emphasized that in the future it will also adjust the multiplier and additional errors during the reproduction of DC voltage small values in working conditions. \u0000The scientific results, presented in this article, were obtained in the frame of research project number 0115U000446, 01.01.2015 - 31.12.2017, financially supported by the Ministry of Education and Science of Ukraine.","PeriodicalId":52864,"journal":{"name":"Metrologiia ta priladi","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47447342","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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