关键词: 光纤光栅/
声发射传感/
冲击定位/
支持向量机
English Abstract
Acoustic emission localization technique based on fiber Bragg grating sensing network and signal feature reconstruction
Zhang Fa-Ye,Jiang Ming-Shun,
Sui Qing-Mei,
Lü Shan-Shan,
Shan Jia
1.School of Control Science and Engineering, Shandong University, Jinan 250061, China
Fund Project:Project supported by the National Natural Science Foundation of China (Grant No. 41472260), the Natural Science Foundation of Shandong Province, China (Grant No. ZR2014FM025), the Fundamental Research Funds of Shandong University, China (Grant No. 2016JC012), and the Young Scholars Program of Shandong University, China (Grant No. 2016WLJH30).Received Date:09 October 2016
Accepted Date:27 March 2017
Published Online:05 April 2017
Abstract:Based on the analysis of the propagation mechanism of acoustic emission stress waves caused by impact excitation on aluminum alloy plates, The geometrical model of steel ball impacted aluminum alloy plate was built by ABAQUS software, and the stress wave propagation process is simulated and analyzed. The stress wave propagation process is simulated and analyzed and an acoustic emission sensing system based on the principle of edge filtering is constructed. The acoustic emission stress waves were collected to establish the acoustic emission region localization model. The localization method of acoustic emission region based on diffusion mapping and support vector machine is proposed and verified experimentally. Multiple acoustic emission localization experiments were performed on an aluminum alloy plate of 300 mm300 mm2 mm, which was divided into 36 test area. The results show that the localization accuracy is 30 mm30 mm and the positioning accuracy was 97.5%, while consuming 0.781 s. The study provides an effective method for acoustic emission localization.
Keywords: fiber Bragg grating/
acoustic emission sensing/
impact location/
support vector machine
