An optical fiber F-P acoustic emission sensor system for the detection of steel crack initiation

Xinglin Tong; Tao Ji; Wanting Wei; Changshan Wen; Xiaolong Zhu; Zhuoyan Leng

doi:10.1117/12.968199

7 November 2012 An optical fiber F-P acoustic emission sensor system for the detection of steel crack initiation

Xinglin Tong, Tao Ji, Wanting Wei, Changshan Wen, Xiaolong Zhu, Zhuoyan Leng

Proceedings Volume 8421, OFS2012 22nd International Conference on Optical Fiber Sensors; 8421AG (2012) https://doi.org/10.1117/12.968199
Event: OFS2012 22nd International Conference on Optical Fiber Sensor, 2012, Beijing, China

Abstract

In this paper, an optical fiber Fabry-Perot(F-P) acoustic emission(AE) sensor system for the detection of steel crack initiation has been investigated. The F-P sensors were fabricated by using quartz diaphragm, glass tube and fiber optic. And the signal processing circuit was designed by using an intensity demodulation method. The test of steel crack initiation was simulated by using a pencil lead break experiment. The results indicate that the F-P sensing system can detect weak AE signals at the frequency between 20 kHz and 1MHz, which could be used to on-line monitor of the steel structure health.

Citation Download Citation

Xinglin Tong, Tao Ji, Wanting Wei, Changshan Wen, Xiaolong Zhu, and Zhuoyan Leng "An optical fiber F-P acoustic emission sensor system for the detection of steel crack initiation", Proc. SPIE 8421, OFS2012 22nd International Conference on Optical Fiber Sensors, 8421AG (7 November 2012); https://doi.org/10.1117/12.968199

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