Damping measurement using laser self-mixing interference with spectrum analysis

被引：0
作者：
Wang, Rui [1 ]
Xiong, Yanbin [1 ]
Feng, Teng [1 ]
Yang, Huiru [1 ]
Chen, Hanqiao [1 ]
Huang, Wencai [1 ]
机构：
[1] Xiamen Univ, Dept Elect Engn, Xiamen 361005, Peoples R China
来源：
OPTICAL METROLOGY AND INSPECTION FOR INDUSTRIAL APPLICATIONS V | 2018年 / 10819卷
基金：
中国国家自然科学基金;
关键词：
damping; self-mixing; spectrum; Fourior transform; DIODE;
D O I：
10.1117/12.2502438
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
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.
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页数：7
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