Damping measurement using laser self-mixing interference with spectrum analysis

Rui Wang; Yanbin Xiong; Teng Fen; Huiru Yang; Hanqiao Chen; Wencai Huang

doi:10.1117/12.2502438

7 November 2018 Damping measurement using laser self-mixing interference with spectrum analysis

Rui Wang, Yanbin Xiong, Teng Fen, Huiru Yang, Hanqiao Chen, Wencai Huang

Proceedings Volume 10819, Optical Metrology and Inspection for Industrial Applications V; 1081910 (2018) https://doi.org/10.1117/12.2502438
Event: SPIE/COS Photonics Asia, 2018, Beijing, China

Abstract

A method for measuring the damping coefficient of vibrating target based on Fourier transform of self-mixing interference signal is presented. Theoretical researches indicate, the dominant harmonic order of the laser self-mixing signal is proportional to the amplitude of vibration. Based on this theory, damping efficient can be extracted from the ratio between the amplitudes of the vibration target at different moments. The error of the damping coefficient is about 4%.This method characterized by simple structure, non-contact measurement and high accuracy, can be extensively applied in measurement of industrial harmonic damping vibration.

Citation Download Citation

Rui Wang, Yanbin Xiong, Teng Fen, Huiru Yang, Hanqiao Chen, and Wencai Huang "Damping measurement using laser self-mixing interference with spectrum analysis", Proc. SPIE 10819, Optical Metrology and Inspection for Industrial Applications V, 1081910 (7 November 2018); https://doi.org/10.1117/12.2502438

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