These deviations have to be smaller than the extended

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Unformatted text preview: GUM. In addition, possible correlations between several factors have to be analyzed on measurements. The achieved results are structured and saved in a database, thus they are easily accessible for further automatic application in different measurement circumstances. However, the uncertainties ukal (from calibration of the reference workpiece), uprz (from the measurement process determined by repeated measurements) and uws (from the differences between master part and series workpiece) contribute to the feature specific measurement uncertainty. Monitoring Coordinate Measuring Machines 129 3.2. Calculation of the measurement uncertainty The standard uncertainty ukal can be derived from the extended standard uncertainty Ukal and the extension factor k, which are indicated in the calibration certificate: U kal (1) k The standard uncertainty of the measurement process on the CMM uprz determined by repeated measurements for each scenario, in each monitoring field (figure 3) and for the series of observations (p1, p2....pk) can be determined by u kal = u prz = s( p k ) n (2) 1 1 (3) ∑ ( p k − p...
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This note was uploaded on 08/03/2010 for the course DD 1234 taught by Professor Zczxc during the Spring '10 term at Magnolia Bible.

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