The technology of grating laser Doppler velocimeter for measuring transverse velocity of objects

Shu Zhang; Guangfeng Lu; Zhenfang Fan; Hui Luo

doi:10.1117/12.2072501

3 December 2014 The technology of grating laser Doppler velocimeter for measuring transverse velocity of objects

Shu Zhang, Guangfeng Lu, Zhenfang Fan, Hui Luo

Proceedings Volume 9297, International Symposium on Optoelectronic Technology and Application 2014: Laser and Optical Measurement Technology; and Fiber Optic Sensors; 92971A (2014) https://doi.org/10.1117/12.2072501
Event: International Symposium on Optoelectronic Technology and Application 2014, 2014, Beijing, China

Abstract

In order to lower production cost of Laser Doppler velocimeter (LDV) and simplify the system structure, a grating Doppler detection system has been designed. This LDV was carried out by differential measurement mode. Two beams of diffracted light from the grating are mixed, and the beat frequency will be detected by a detector when the grating is moving. Fundamentals also have been introduced and partial experiment results of this system are given out. The result indicates the experimental value is agreement with the theoretical value. Errors have been analyzed and the main factors affecting the accuracy were discussed. Upon inspection, the inexpensive and ease LDV is efficient to administer and feasible.

Citation Download Citation

Shu Zhang, Guangfeng Lu, Zhenfang Fan, and Hui Luo "The technology of grating laser Doppler velocimeter for measuring transverse velocity of objects", Proc. SPIE 9297, International Symposium on Optoelectronic Technology and Application 2014: Laser and Optical Measurement Technology; and Fiber Optic Sensors, 92971A (3 December 2014); https://doi.org/10.1117/12.2072501

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