Virtual measuring instruments as means of uncertainty evaluation
Date
2005-02-24
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Видавництво Львівської політехніки
Lviv Politechnic Publishing House
Lviv Politechnic Publishing House
Abstract
Modern measuring instruments as highly technological, precise, multi-functional tools today are complex
systems, and estimation of their uncertainty turns into a non-trivial task of science. To provide information about the probability of
results, their convergence, and reproducibility, it is necessary to analyze the task-oriented measurement uncertainty. As an
approach to determining the uncertainty of complex systems, to avoid the need for professionally experienced personnel and
expensive “artifacts” used for evaluation, there is a method of a so-called virtual measuring instrument. In this method, the
measurement process is simulated, taking into account the influence of the main disturbance parameters and conducting statistical
analysis using the Monte Carlo approach. All characteristics of virtual modules repeat the properties of real devices but allow
quick and qualitative evaluation of environmental parameters' effect on the accuracy, as well as the uncertainty of measurement. It
allows us to evaluate the correctness of the result under the present conditions. The measurement uncertainty is usually caused by
several major sources. Uncertainty depends on the method of measurement, but there are still common factors, i.e. uncertainty
caused by measuring instruments, methods, operators, and environment. Among environmental influences, it is important to
highlight – the change of light and temperature, which can vary widely variate at the production process, and at the same time have
a crucial impact on the uncertainty of measurement. The paper presents a virtual measurement instrument method and its known implementations.
Description
Keywords
WVirtual measuring instrument, Uncertainty evaluation, Simulation and statistical analysis of measuring uncertainty, Monte Carlo method, Coordinate-measuring machine
Citation
Havryliv D. Virtual measuring instruments as means of uncertainty evaluation / Denys Havryliv, Roman Velgan // Measuring Equipment and Metrology. — Lviv : Lviv Politechnic Publishing House, 2020. — Vol 81. — No 3. — P. 3–8.