Application of range imaging lidar for measurement of mechanical vibration and frequency mode distribution

Hua An Zhang; Yonghao Zhu; Yun He

doi:10.1117/12.144085

11 May 1993 Application of range imaging lidar for measurement of mechanical vibration and frequency mode distribution

Hua An Zhang, Yonghao Zhu, Yun He

Proceedings Volume 1979, 1992 International Conference on Lasers and Optoelectronics; (1993) https://doi.org/10.1117/12.144085
Event: 1992 International Conference on Lasers and Optoelectronics, 1992, Bejing, China

Abstract

This article reports the application of laser range imaging radar in the measurement of mechanical vibration frequency and the mode distribution, and the periodic motion of the mechanical parts such as a piston rod. The principle of the laser range imaging radar is based on the phase shift of the reflected amplitude modulated laser beam. The mechanical vibration frequency up to 20 KHZ and the minimal retrieved amplitude (or the motion displacement) of 0.5 mm have been achieved with the laser modulating frequency of 40 MHZ. With appropriate modulating frequency, this laser range system can measure the mechanical vibration amplitude, or the moving displacement, from 10^-1 mm up to 10² mm, or even higher to the order of meters, which will be useful to measure the vibration and the periodic motion of machines and their parts for field test.

Citation Download Citation

Hua An Zhang, Yonghao Zhu, and Yun He "Application of range imaging lidar for measurement of mechanical vibration and frequency mode distribution", Proc. SPIE 1979, 1992 International Conference on Lasers and Optoelectronics, (11 May 1993); https://doi.org/10.1117/12.144085

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