engleski

EXAMPLE OF CALCULATING CORRECTIONS AND MEASUREMENT UNCERTAINTY IN THE PROCEDURE OF MEASURING SPHERES

Metrology practice confirms that very often by carrying out the corrections the result of measurement may contain greater error (deviation) than in the case of no corrections at all. Therefore, it is often assumed that the value of correction is zero, with assumed influences on the uncertainty of correction included in the uncertainty of the measuring results. In the field of length metrology the correction cannot be avoided in case of temperature influences or actions of the measuring force during the measurement procedure. Numerous experiences show that temperature correction is a questionable procedure due to a whole number of unknowns, and in case of more demanding measurements and the related more demanding uncertainties of measurement, one resorts to achieving of standard temperature conditions. However, the measurement results have to be corrected in case of the action of the measurement force, especially because the value of correction often exceeds the value of uncertainty of measurement. An example of measuring the sphere diameter, described in this work, fully supports the mentioned claim.

measurement sphere; uncertainty of measurement; Monte Carlo simulations

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