ONLINE VALIDATION OF NUMERICAL ALGORITHMS IN THE FIELD OF METROLOGY

F. Härtig, B. Müller, K. Wendt, M. Gahrens, M. Franke, H. Delpy, A. Forbes, I. Smith

Abstract

Numerical algorithms used in metrology can be online validated based on testdata and corresponding reference results in order to improve the reliability of measurement results. An established realization of the online validation is named Traceability for Computationally-Intensive Metrology (TraCIM). It allows service user to validate their software at the point of use. The service is operated by European national metrology institutes (NMIs). <BR />TraCIM is based on three pillars, the technical implementation, the legal aspects, and the commercial requirements. The technical implementation provides a client-server concept. It allows a direct link between the NMIs and the service users. It is a fundamental principle that the TraCIM service is provided and hosted only by a NMI or an authorized organization. These institutions assume del credere liability and finally guarantee for the correctness of the results. <BR />Meanwhile, TraCIM is registered as a wordmark. It is operated as a legal non-profit association under German law and allows only NMIs and designated institutes (DIs) to become members. The TraCIM association has been established with its main mission to provide quality rules for the TraCIM service. The business concept and the income of the TraCIM service are strictly uncoupled from the TraCIM association. <BR />An example allowing to validate a least square fit for regular geometries such as cylinders, cones, planes and spheres is used to explain an application. This example is developed at the Physikalisch-Technische Bundesanstalt (PTB). A detailed focus is given on the TraCIM organization and the client server application.

Keywords

software test, validation of algorithms, Gaussian test, TraCIM

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DOI

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IMEKO TC

TC14 - Measurement of Geometrical Quantities

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