Methods to Improve the Sensitivity and Stability of CFPI for Surface Ultrasonic Vibration Detection

DING Hongsheng; TONG Lige; YIN Hong; GONG Yuliang

doi:10.13374/j.issn1001-053x.2001.05.016

Volume 23 Issue 5

Aug. 2021

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Article Navigation > Chinese Journal of Engineering > 2001 > 23(5): 445-448

DING Hongsheng, TONG Lige, YIN Hong, GONG Yuliang. Methods to Improve the Sensitivity and Stability of CFPI for Surface Ultrasonic Vibration Detection[J]. Chinese Journal of Engineering, 2001, 23(5): 445-448. doi: 10.13374/j.issn1001-053x.2001.05.016

Citation:

DING Hongsheng, TONG Lige, YIN Hong, GONG Yuliang. Methods to Improve the Sensitivity and Stability of CFPI for Surface Ultrasonic Vibration Detection[J]. Chinese Journal of Engineering, 2001, 23(5): 445-448. doi: 10.13374/j.issn1001-053x.2001.05.016

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Methods to Improve the Sensitivity and Stability of CFPI for Surface Ultrasonic Vibration Detection

doi: 10.13374/j.issn1001-053x.2001.05.016

1. Cryogenic Center, Chinese Acadymy of Science, Beijing 100080;
2. Department of Physics, UST seijing, Beijing 100083;
3. Mechanical Engineering School, UST Beijing Beijing 100083

Received Date: 2001-01-12

Abstract

Abstract

Confocal Fabry-Perot Interferometer (CFPI) is the demdulation device for surfce ultrasonic vibration detection. Its sensitivity and stability play very driportant roles in whole system. In this paper, a new detection system is introduced. By using both conjugate rays, the system sensitivity is doubled. Moreover, a single chip microcomputer (MCS-51) feedback control loop is applied to stabilize the working point at optimum position. The system has performed in detecting piezoelectric ultrasonic on surface of an aluminum sample.
- Confocal Fabry-Perot Interferometer (CFPI),
- ultrasonic vibraion deection,
- sensitivity,
- stability