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Proceedings Paper

Vibration measurement system of dual-path detection based on Michelson interferometer
Author(s): Jing Liang; Jun Zhu; Chao Jiang; Fei Ai; Miaomiao Shi; Bo Zhang; Benli Yu
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Paper Abstract

Based on the Michelson interferometer, we use the circulator to realize the dual-path detection of the vibration signal, which reduce the intensity noise caused by laser source. Reflectors are connected to the terminal of the signal arm and reference arm respectively. The phase generated carrier (PGC) technology should use piezoelectric ceramic (PZT) to generate carrier signal with high frequency in traditional demodulation techniques. Whereas the PZT is sensitive to the external environment changing, so accuracy of vibration measurement will fall down, in order to solve this problem the fiber waveguide modulator was used in the system instead of PZT. Then we use arctangent algorithm instead of PGC algorithm to demodulate the signals, which could greatly simplify the algorithm. The output of the signals are input into the computer through the data acquisition card and then demodulated by arctangent algorithm compiled by Labview. Theoretical analysis and experimental prove the phase orthogonality of the two output signals, the amplitude and frequency of the vibration signal can be detected at the same time. The Experiment results indicate that the system can demodulate the vibration signal accurately.

Paper Details

Date Published: 23 November 2009
PDF: 8 pages
Proc. SPIE 7508, 2009 International Conference on Optical Instruments and Technology: Advanced Sensor Technologies and Applications, 75081A (23 November 2009); doi: 10.1117/12.838119
Show Author Affiliations
Jing Liang, Anhui Univ. (China)
Jun Zhu, Anhui Univ. (China)
Chao Jiang, Anhui Univ. (China)
Fei Ai, Anhui Univ. (China)
Miaomiao Shi, Anhui Univ. (China)
Bo Zhang, Anhui Univ. (China)
Benli Yu, Anhui Univ. (China)

Published in SPIE Proceedings Vol. 7508:
2009 International Conference on Optical Instruments and Technology: Advanced Sensor Technologies and Applications
YanBiao Liao; Anbo Wang; Tingyun Wang; Yukihiro Ishii, Editor(s)

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