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Uncertainty of the variation in length of gauge blocks by mechanical comparison: a worked example.
- Source :
- Measurement Science & Technology; Sep2012, Vol. 23 Issue 9, p1-6, 6p
- Publication Year :
- 2012
-
Abstract
- This paper is a study on the determination of the measurement uncertainty for a relatively simple and widespread calibration task. The measurement of a special form deviation of gauge blocks using the so-called five-point technique is discussed in detail. It is shown that the mainstream treatment of the measurement uncertainty (i.e. propagation of uncertainties) cannot be applied to this problem for principal reasons; the use of supplement 1 of the GUM (Monte Carlo method) is mandatory. The proposed model equation is probably the simplest 'real world' example where the use of supplement 1 of the GUM not only gives better results, but gives results at all. The model is simple enough to serve as a didactical example. Explicit analytical expressions for the probability density functions, expectation values, uncertainties and coverage intervals are given which is helpful for the validation of dedicated software products. Eventually a complete avoidance of the standardized form parameters in calibration certificates is proposed. The statement of 'corner-deviations' would be much more useful, especially for the evaluation of key comparisons. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09570233
- Volume :
- 23
- Issue :
- 9
- Database :
- Complementary Index
- Journal :
- Measurement Science & Technology
- Publication Type :
- Academic Journal
- Accession number :
- 78709455
- Full Text :
- https://doi.org/10.1088/0957-0233/23/9/094003