Abstract
In this paper, a novel measurement strategy, based on a 4D error-compensation model for the measurement of free-form surfaces in laser measurement systems, is presented. To improve the measurement accuracy, effects of the inclination angle and the azimuth angle (including the rotation angle and the deflection angle) on the measurement results are investigated experimentally. Considering the error compensation and the constructing iterative function, a calibration method for arbitrary positions and orientations of the laser-beam is presented, and a corresponding measurement strategy is presented. To verify the effectiveness and accuracy of the proposed measurement strategy, calibration schemes of a check bar geometry center are studied based on a 4-axis measuring platform. The obtained results demonstrate that the proposed strategy can greatly improve the measurement accuracy.
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