Analysis of CMM measurements of hole plates in interlaboratory comparisons (English)

How to get this document?

Local TIB services
TIB document delivery Purchase

Interlaboratory comparisons are a key activity in monitoring and improving the state of art in all measurement disciplines, and they have assumed increased importance in the metrological community now that the Mutual Recognition Arrangement provides a framework for users of metrological services to assess the competence of laboratories. While the evaluation of an ensemble of measured values derived from an artefact that provides a single reference quantity, such as a kilogram mass or a gauge block length standard, still poses problems, the analysis of measured values for an artefact, such as a hole or ball plate, that provides multiple references represents a new set of challenges. Even a 5 x 5 hole plate presents 47 independent reference quantities (three degrees of freedom are removed by fixing a frame of reference). The measurement of such a hole plate will normally reflect correlated effects and a full account of these correlations requires up to 1128 ((47 x 48)/2) variances and covariances, the elements of a 47 x 47 uncertainty matrix. In fact, if all the participants were able to provide an uncertainty matrix, we show that an evaluation approach can be developed, taking into account frames of reference, within the general framework provided by multivariate statistics. However, uncertainties in coordinate metrology are usually expressed in terms of an A + L/B statement where L/B represents the dependence on the length L of the artefact. Such uncertainty statements provide only a partial description of the uncertainty information and limit the analysis that can be performed. While an aim of the paper is to help those involved in interlaboratory comparisons, the same issues arise whenever an artefact is measured by two CMMs, e.g., by a component supplier and a manufacturer, and an assessment is required concerning whether or not the two sets of measured values are consistent with each other.

Table of contents conference proceedings

The tables of contents are generated automatically and are based on the data records of the individual contributions available in the index of the TIB portal. The display of the Tables of Contents may therefore be incomplete.

Characterisation of dynamic errors of an ultra precision machine tool
Morantz, P. / Luo, X. / Shore, P. | 2007
Test piece for testing simultaneous 5-axis machining
Bossoni, S. / Cupic, J. | 2007
Theoretical and experimental approach for the evaluation of structural dynamics of CNC machine tools
Pislaru, C. / Ford, D.G. / Widiyarto, M.H.N. / Myers, A. | 2007
Rule based feed rate optimisation for machine tools
Hadorn, M. / Jäger, C. / Steinlin, M. | 2007
Micro structuring by ultra short pulsed laser ablation
Fleischer, Juergen / Haupt, Sebastian | 2007
Machine tool calibration: Geometric test uncertainty depends on machine tool performance
Bringmann, B. / Knapp, W. | 2007
Calibration of hybrid kinematics with a 1-DOF gauge
Denkena, Berend / Möhring, Hans-Christian | 2007
Diamond machining of diffractive optical patterns by using a nanometer-stroke Fast Tool Servo
Brinksmeier, E. / Gläbe, R. / Lünemann, B. | 2007
A new model for surface roughness evolution in the Chemical Mechanical Polishing (CMP) process
Savio, G. / Meneghello, R. / Concheri, G. | 2007
Precision balancing in ultraprecision diamond machining
Brinksmeier, E. / Gläbe, R. / Krause, A. | 2007
A compact 6 D.O.F. geometric error measurement system with PSDs for long travel range in mMT
Kwon, Seol-Ryung / Lee, Jae-Ha / Yang, Seung-Han | 2007
Calibration of a 3D- ball plate
Liebrich, T. / Bringmann, B. / Knapp, W. | 2007
Analysis of CMM measurements of hole plates in interlaboratory comparisons
Forbes, A.B. | 2007
Petri net-based approach for web service automation resource coordination
Mendes, J.Marco / Leitao, Paulo / Colombo, Armando W. / Restivo, Francisco | 2007