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Proceedings Paper

Study on remote measurement technique of displacement or velocity by laser Doppler effect
Author(s): Chengzhi Jiang; Fang Cheng; Mai Wu; Zhengming Feng; Lincai Chen
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Paper Abstract

The paper describes a remote measurement technique by using laser to illuminate the moving grating (scattering object) which produces the Doppler effect of diffracted light to measure the tangential displacement (velocity). The optical systems that can realize the measurement are presented and their characteristics are compared. The principle of measurement is analyzed, and the foundation of selecting the grating and laser is discussed also. The result of experiment proves that the method produces qualified signal, and it can be used to measure the remote tangential displacement precisely. At the distance of 3,000 mm, the maximum accumulative error in the measurement range of 5 mm is less than 3 micrometers .

Paper Details

Date Published: 8 September 1994
PDF: 8 pages
Proc. SPIE 2358, First International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, (8 September 1994); doi: 10.1117/12.185320
Show Author Affiliations
Chengzhi Jiang, Tianjin Univ. (China)
Fang Cheng, Tianjin Univ. (China)
Mai Wu, Tianjin Univ. (China)
Zhengming Feng, Tianjin Univ. (China)
Lincai Chen, Tianjin Univ. (China)


Published in SPIE Proceedings Vol. 2358:
First International Conference on Vibration Measurements by Laser Techniques: Advances and Applications

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