Oleh Velychko

State Enterprise "Ukrmetrteststandard"

Prof. Oleh Velychko received a master’s degree in Radio Engineering and a Ph.D. in Metrology. Since 2005, he has been Director of the Institute of Electromagnetic Measurements of the State Enterprise ”Ukrmetrteststandard,” Kyiv, Ukraine. He has experience in creating and comparing national standards of electrical quantities. He is also a committee member for the International Measurement Confederation (IMEKO), the International Electrotechnical Commission (IEC), and the Euro-Asian Cooperation of National Metrological Institutions (COOMET). Prof. Velychko has published several book chapters.

1books edited

3chapters authored

Latest work with IntechOpen by Oleh Velychko

In the modern era of scientific and technological development, the role of measurements and metrology in scientific research is becoming more and more important due to the increase in the testing of various products. Moreover, requirements for the accuracy and reliability of measurement results are increasing significantly and their ranges are expanding. Improving measurement accuracy allows us to identify the shortcomings of certain technological processes and either eliminate them or reduce their influence. This leads to better-quality products and contributes to saving energy and other resources, as well as raw materials and materials. This book discusses relevant aspects of practical metrological activity to establish traceability of measurements while increasing their accuracy and reliability. It also presents procedures for the calibration and testing of measuring instruments.

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Applied Aspects of Modern Metrology

Edited by Oleh Velychko

Chapters authored

The Uncertainty Estimation and Use of Measurement Units in National Inventories of Anthropogenic Emission of Greenhouse Gas

By Oleh Velychko and Tetyana Gordiyenko

Part of the book: Greenhouse Gases

Metrological Traceability at Different Measurement Levels

By Oleh Velychko and Tetyana Gordiyenko

The international agreements are the basis for establishing the global metrological traceability at different measurement levels. The concepts and concept relations around metrological traceability are presented. An important element of providing the metrological traceability is the evaluation of measurement uncertainty. The procedure of linking of key and supplementary comparison results is described. Linking of key and supplementary comparison results of the Regional Metrology Organization for some quantities according to the described procedure was presented. Results for all participants of presented key and supplementary comparisons are satisfactory for chi-square test and En number. The procedure of linking of key or supplementary comparison and national inter-laboratory comparison results is described. This procedure can be used for practical evaluation of specific inter-laboratory comparison results on a national level in different countries by means of laboratory results of the National Metrology Institute and Designated Institute. This procedure can contribute the mutual recognition of measurement and testing results by different countries. Linking of key comparison and inter-laboratory comparison results for some quantities according to the described procedure was presented. Results for all participants of presented key comparison and inter-laboratory comparison are satisfactory for chi-square test, En number, z scores and ζ scores.

Part of the book: Standards, Methods and Solutions of Metrology

The Data Evaluation of Interlaboratory Comparisons for Calibration Laboratories

By Oleh Velychko and Tetyana Gordiyenko

National accreditation agencies in different countries have set quite strict requirements for accreditation of testing and calibration laboratories. Interlaboratory comparisons (ILCs) are a form of experimental verification of laboratory activities to determine technical competence in a particular activity. Successful results of conducting ILCs for the laboratory are a confirmation of competence in carrying out certain types of measurements by a specific specialist on specific equipment. To obtain reliable results of ILC accredited laboratories, it is necessary to improve the methods of processing these results. These methods are based on various data processing algorithms. Therefore, it is necessary to choose the most optimal method of processing the obtained data, which would allow to obtain reliable results. In addition, it is necessary to take into account the peculiarities of the calibration laboratories (CLs) when evaluating the results of ILС. Such features are related to the need to provide calibration of measuring instruments for testing laboratories. The evaluation results for ILCs for CLs are presented. The results for all participants of ILCs were evaluated using the En and z indexes. The obtained results showed that for the such ILCs it is also necessary to evaluate the data using the z index also.

Part of the book: Applied Aspects of Modern Metrology

Oleh Velychko

Latest work with IntechOpen by Oleh Velychko

Applied Aspects of Modern Metrology

Chapters authored

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