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Proceedings Paper

Error analysis and improvements for using parallel-shift method to test a galvanometer-based laser scanning system
Author(s): William Xinzuo Li; Larry D. Mitchell
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Paper Abstract

The Scanning Laser Doppler Vibrometry (SLDV) technique has brought modal testing into a new era. A galvanometer-based laser scanning system for SLDV provides the position accuracy, speed, and flexibility for data acquisition. Testing and calibrating such a scanning system to meet the precision requirements of modal testing has led to the development of the novel parallel-shift method for testing and calibration of the scanning system. This parallel-shift method can provide a cost-effect means for systematic laser scanning accuracy test. However, a number of measurement errors could be involved during the scanning accuracy test. These errors could severally affect the accuracy of the test itself. It is necessary to quantitatively determine the effects of the measurement errors to evaluate and to improve the accuracy of the test. This paper gives a detailed analysis for all the errors involved in the galvanometer-based laser scanning accuracy test using the parallel-shift method. Improvements of the test setup and test procedure are also proposed.

Paper Details

Date Published: 8 September 1994
PDF: 10 pages
Proc. SPIE 2358, First International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, (8 September 1994); doi: 10.1117/12.185301
Show Author Affiliations
William Xinzuo Li, Virginia Polytechnic Institute and State Univ. (United States)
Larry D. Mitchell, Virginia Polytechnic Institute and State Univ. (United States)


Published in SPIE Proceedings Vol. 2358:
First International Conference on Vibration Measurements by Laser Techniques: Advances and Applications
Enrico Primo Tomasini, Editor(s)

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