Acoustic Emission Localization Based on FBG Sensing Network and SVR Algorithm

• 作者: Dianli HOU Mingshun JIANG Xiuxia ZHAO Yaozhang SAI
• 来源期刊: 光子传感器:英文版
• 学科: 工学
• 关键词: 声发射信号 光纤光栅 定位算法 传感网络 SVR 定位基 复合材料结构 光纤布拉格光栅
• 年，卷（期）: 2017,（1）
• 页码范围: 48-54
• 页数: 7页
• 分类号: TP212.14
• 语种: 中文

摘要

In practical application, carbon fiber reinforced plastics (CFRP) structures are easy to appear all sorts of invisible damages. So the damages should be timely located and detected for the safety of CFPR structures. In this paper, an acoustic emission (AE) localization system based on fiber Bragg grating (FBG) sensing network and support vector regression (SVR) is proposed for damage localization. AE signals, which are caused by damage, are acquired by high speed FBG interrogation. According to the Shannon wavelet transform, time differences between AE signals are extracted for localization algorithm based on SVR. According to the SVR model, the coordinate of AE source can be accurately predicted without wave velocity. The FBG system and localization algorithm are verified on a 500mm*SOOmm*2mm CFRP plate. The experimental results show that the average error of localization system is 2.8 mm and the training time is 0.07 s.