DOI: 10.18503/1995-2732-2025-23-1-138-148
Abstract
Statement of the problem (relevance of the work). The issue of assessing the quality of electrical measuring instruments establishes the need to carry out a list of non-trivial operations aimed at assessing the greatest number of parameters characterizing measuring devices. One of the most common methods of analysis in science is the assessment of results in terms of statistics and probability, describing the possibility of a certain list of operating scenarios or states, as well as assessing the quantitative side of mass phenomena in numerical format. Based on the results obtained, it is possible to produce the most accurate qualitative assessment reflecting the correctness of the functioning, feature and degree of suitability of the device or process under study. Objectives. The purpose of the study is to derive a universal dependence of the key parameter of the accuracy of electrical measuring instruments on the quantitative assessment of the probability of correct verification. Methods Applied. The work uses various methods of scientific, practical and technical research with references to regulatory documentation in the fields of metrology and quality of products and processes. The study uses various mathematical models and methods that evaluate the compliance of the measurement results with the normal distribution law. Additionally, a software package and programming language are used to automate calculations and obtain the results of the constructed dependence. Originality. The paper presents a methodology for calculating the probability of correctness of verification of electrical control and measuring instruments based on the results of predicting the change in the standard deviation parameter depending on the accuracy of the measuring device, which allows obtaining probability results with a high degree of reliability. Result. The paper presents a methodology for constructing a universal operational characteristics of verification based on the conducted results of the study of the distribution law of electrical measurements as a random variable, as well as the results of assessing the predicting change in the accuracy and standard deviation of a sample of measurements. The obtained result shows the dynamics of the manifestation of statistical outliers with varying degrees of both probability and measurement value, falsifying further assessments of the state of devices or systems. Practical Relevance. The result of the conducted research is the definition and justification of an additional quality parameter for electrical control and measuring instruments, the use of which will increase the degree of reliability, accuracy and depth of the conducted qualitative assessments of measuring products or measurement results. Based on the presented research, it is possible to formulate a justification for the procedure for changing the potential accuracy of devices or changing the inter-verification interval based on the results of scheduled certification.
Keywords
electrical control and measuring instruments, quality, operational characteristics of verification, accuracy, probability, statistics, distribution law
For citation
Bobryshov A.P., Kuzmenko V.P., Solyony S.V., Kvas E.S. Universal Operational Characteristics of Quality Assessment of Electrical Control and Measuring Instruments. Vestnik Magnitogorskogo Gosudarstvennogo Tekhnicheskogo Universiteta im. G.I. Nosova [Vestnik of Nosov Magnitogorsk State Technical University]. 2025, vol. 23, no. 1, pp. 138-148. https://doi.org/10.18503/1995-2732-2025-23-1-138-148
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