MEASUREMENT UNCERTAINTY COMBINED WITH THE MODEL OF PRODUCT AND MEASUREMENT REALIZATION IN 3D METROLOGY

C. R. Baldo, G. D. Donatelli

Abstract

Even though coordinate metrology has been proven to be priceless to industries and despite the existence of methods to estimate uncertainties, e.g. sensitivity analysis, computer simulation, experimental method; uncertainty has been barely assessed and stated by industrial metrologists. Part of that perception may be attributed to a restricted way of employing the measurement uncertainty concept, which is not compatible with the growing importance of metrology. The merging of the well-known product and measurement realization process with measurement uncertainty concept is outlined in this work. The main idea is to use in a rational sense different techniques of evaluating the uncertainty of a measurement result, where the estimated accuracy required to the uncertainty estimation defines the suitable technique. Within the proposed context, the drawing-up of classical uncertainty budgets for GPS characteristics are shown and discussed for different measurement scenarios.

Keywords

uncertainty evaluation and traceability, GPS characteristics, industrial coordinate metrology

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IMEKO-WC-2012-TC14-P7.pdf

DOI

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IMEKO TC

TC14 - Measurement of Geometrical Quantities

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