Ring cavity all fiber F-P interferometer used in detection of acoustic emission

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Ring cavity all fiber F-P interferometer used in detection of acoustic emission

Article | 更新时间：2020-08-12

- Ring cavity all fiber F-P interferometer used in detection of acoustic emission
- Optics and Precision Engineering Vol. 17, Issue 8, Pages: 1825-1831(2009)
- 作者机构：
  
  哈尔滨工程大学2. 哈尔滨工程大学理学院
- 作者简介：
- 基金信息：
- DOI：
  CLC： TB523;TP212
- Received：10 September 2008，
  
  Revised：27 October 2008，
  
  Published Online：20 August 2009，
  
  Published：20 August 2009
- 稿件说明：
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梁艺军,刘俊锋,张巧萍,樊晨光,吴雷. 环形腔全光纤F-P干涉仪的声发射检测实验研究[J]. 光学精密工程, 2009,17(8):1825-1831

Ring cavity all fiber F-P interferometer used in detection of acoustic emission[J]. Optics and precision engineering, 2009, 17(8): 1825-1831.
梁艺军,刘俊锋,张巧萍,樊晨光,吴雷. 环形腔全光纤F-P干涉仪的声发射检测实验研究[J]. 光学精密工程, 2009,17(8):1825-1831 DOI：

Ring cavity all fiber F-P interferometer used in detection of acoustic emission[J]. Optics and precision engineering, 2009, 17(8): 1825-1831. DOI：

摘要

提出了一种新型结构的用于声发射检测的全光纤F-P干涉仪。选用2×2光纤耦合器，将耦合器的一个入射端与一个出射端焊接相连，以耦合器代替传统的反射腔面，构成光纤环形传输腔，腔体贴附或埋入待测固体中检测声发射信号。通过理论推导和计算机仿真，确定了此结构光纤传感器的检测特性。实验以大理石板作为待测介质，对利用信号发生器驱动PZT（压电陶瓷）作为已知超声源在大理石板中产生的连续型声发射信号，及冲击波作用下大理石板中产生的突发型声发射信号进行了检测，并利用Fourier变换，得到了声发射信号的特征频率。实验结果表明，此种结构传感器能够检测材料结构中促使光纤轴向伸缩长度的量级为10-8m的声发射信号并识别其特征频率，该结构光纤传感器无需光程的匹配，适用于大尺度构件的监测，为材料结构健康检测与监控提供了一种新的方法。

Abstract

Proposed the ring cavity all fiber F-P interferometer used in AE (acoustic emission) detection. By welding the incidence and the exit of the 2×2 optical fiber coupler directly

structure the optical fiber ring cavity

it can be attached or embed in the measured solid to detect the AE signals. Determined the detection property of the optical fiber sensor through the theoretical derivation and the simulation of computer. PZT (Piezoelectric Ceramic) is powered by signal generator as the continuous known ultrasonic source

and the blast wave that is adopted to simulate the burst AE signal in marble slab

they were used to be detected by the optical fiber sensor

and then the characteristic frequency of acoustic emission signal is obtained by Fourier technique. The experimental results indicate that the system can detect acoustic emission signals that cause the optical fiber stretching to 10-8m in axial direction and identify the characteristic frequency of it

this optical fiber sensor works without the match of optical path and apply to monitor the large scale component. It provides a new method for the health examination and the monitoring for material structure.

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中国科学院西安光学精密机械研究所2. 中国科学院国家空间科学中心

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