6533b820fe1ef96bd127a401

RESEARCH PRODUCT

Approaches to evaluate the virtual instrumentation measurement uncertainties

Ciro SpataroSalvatore Nuccio

subject

Propagation of uncertaintyComputer simulationVirtual instrumentationEstimation theoryComputer scienceNumerical analysisProcess (computing)Control engineeringMetrologyMeasurement uncertaintySensitivity analysisElectrical and Electronic EngineeringInstrumentationUncertainty analysis

description

This paper deals with the metrological characterization of virtual instruments. After a brief description of the features, the components and the working principle of the virtual instruments and the various uncertainty sources are analyzed. Then, two methods to evaluate the uncertainty of the measurement results are presented: a numerical method simulating the physical process of the A/D conversion, and an approximated theoretical method applying the "uncertainty propagation law" of the "guide to the expression of uncertainty in measurement." With both methods, the combined standard uncertainty of the measurement result is obtained, starting from the standard uncertainty generated by each single source. The results obtained by means of the theoretical analysis are compared with the ones obtained from numerical simulation and with the ones obtained by means of experimental tests.

yearjournalcountryeditionlanguage
2002-12-01IMTC 2001. Proceedings of the 18th IEEE Instrumentation and Measurement Technology Conference. Rediscovering Measurement in the Age of Informatics (Cat. No.01CH 37188)
https://doi.org/10.1109/imtc.2001.928792