FBG-based ultrasonic wave detection and acoustic emission linear location system

Ming-shun Jiang; Qing-mei Sui; Lei Jia; Peng Peng; Yuqiang Cao

doi:10.1007/s11801-012-1190-4

Optoelectronics Letters ›› 2012, Vol. 8 ›› Issue (3) : 220-223. DOI: 10.1007/s11801-012-1190-4

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FBG-based ultrasonic wave detection and acoustic emission linear location system

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Abstract

The ultrasonic (US) wave detection and an acoustic emission (AE) linear location system are proposed, which employ fiber Bragg gratings (FBGs) as US wave sensors. In the theoretical analysis, the FBG sensor response to longitudinal US wave is investigated. The result indicates that the FBG wavelength can be modulated as static case when the grating length is much shorter than US wavelength. The experimental results of standard sinusoidal and spindle wave test agree well with the generated signal. Further research using two FBGs for realizing linear location is also achieved. The maximum linear location error is obtained as less than 5 mm. FBG-based US wave sensor and AE linear location provide useful tools for specific requirements.

Keywords

Acoustic Emis / Fiber Bragg Grating / Wave Detection / Fiber Bragg Grating Sensor / Linear Location

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Ming-shun Jiang, Qing-mei Sui, Lei Jia, Peng Peng, Yuqiang Cao. FBG-based ultrasonic wave detection and acoustic emission linear location system. Optoelectronics Letters, 2012, 8(3): 220‒223 https://doi.org/10.1007/s11801-012-1190-4

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This work has been supported by the National Natural Science Foundation of China (No. 61074163), the Natural Science Foundation of Shandong Province (No.ZR2011FQ025), and the Independent Innovation Fund of Shandong University (No.2010GN066).