Acoustic emission source linear localization based on an ultra-short FBGs sensing system

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• 作者：Zhongwei Jin (1)
  Mingshun Jiang (1)
  Qingmei Sui (1)
  Faye Zhang (1)
  Lei Jia (1)
  
• 关键词：Acoustic emission (AE) linear location ; fiber Bragg gratings (FBGs) ; Gabor wavelet transform (WT) ; threshold analysis
• 刊名：Photonic Sensors
• 出版年：2014
• 出版时间：June 2014
• 年：2014
• 卷：4
• 期：2
• 页码：152-155
• 全文大小：310 KB
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• 作者单位：Zhongwei Jin (1)
  Mingshun Jiang (1)
  Qingmei Sui (1)
  Faye Zhang (1)
  Lei Jia (1)
  
  1. School of Control Science and Engineering, Shandong University, Jinan, 250061, China
  
• ISSN：2190-7439

文摘

An acoustic emission (AE) linear location system was proposed, which employed fiber Bragg gratings (FBGs) as AE sensors. It was demonstrated that the FBG wavelength could be modulated as the static case when the grating length was much shorter than the AE wavelength. In addition, an improved AE location method based on the Gabor wavelet transform (WT) and threshold analysis was represented. The method was testified through AE linear location experiments based on a tunable narrow-band laser interrogation system using ultra-short FBG sensors as AE sensors. Results of the experiments showed that 86% of the linear location errors were less than 10 mm.