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Proceedings Paper

Simulation-based determination of local optical probing uncertainty for fringe projection measurements
Author(s): Johannes Weickmann
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Paper Abstract

Fringe projection sensors gain in importance in manufacturing quality control due to their multiple advantages. In order to adapt the measurement strategy to a specific inspection task, both a suitable sensor and the necessary measurements have to be chosen, so that the complete workpiece shape is recorded with a tolerance-compatible measurement uncertainty. Thus a reliable forecast of the measurement uncertainty is crucial for an effective inspection-planning procedure. There are multiple influences, whose impacts on the measurement result vary dependent on the position of each measured point. So the local measurement uncertainty at each measured point - here called 'local optical probing uncertainty' - is individual. Today, this local probing uncertainty cannot be predicted. This paper shows a simulationbased approach to eliminate this shortfall. Firstly, a definition for local optical probing uncertainty is given. Then the model for the simulation of fringe projection measurements - including a GUM-compliant forecast for the local probing uncertainty - is described. This simulation is then implemented into an assistance system that supports the inspection planner when setting up the measurement strategy. Finally a method for the experimental verification of the local optical probing uncertainty is introduced and the simulation results are verified.

Paper Details

Date Published: 27 January 2011
PDF: 12 pages
Proc. SPIE 7864, Three-Dimensional Imaging, Interaction, and Measurement, 78640C (27 January 2011); doi: 10.1117/12.871983
Show Author Affiliations
Johannes Weickmann, Friedrich-Alexander-Univ. Erlangen-Nürnberg (Germany)

Published in SPIE Proceedings Vol. 7864:
Three-Dimensional Imaging, Interaction, and Measurement
J. Angelo Beraldin; Ian E. McDowall; Atilla M. Baskurt; Margaret Dolinsky; Geraldine S. Cheok; Michael B. McCarthy; Ulrich Neuschaefer-Rube, Editor(s)

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