title: Development of an FBG Sensor Array for Multi-Impact Source Localization on CFRP Structures.
abstract: We proposed and studied an impact detection system based on a fiber Bragg grating (FBG) sensor array and multiple signal classification (MUSIC) algorithm to determine the location and the number of low velocity impacts on a carbon fiber-reinforced polymer (CFRP) plate. A FBG linear array, consisting of seven FBG sensors, was used for detecting the ultrasonic signals from impacts. The edge-filter method was employed for signal demodulation. Shannon wavelet transform was used to extract narrow band signals from the impacts. The Gerschgorin disc theorem was used for estimating the number of impacts. We used the MUSIC algorithm to obtain the coordinates of multi-impacts. The impact detection system was tested on a 500 mm × 500 mm × 1.5 mm CFRP plate. The results show that the maximum error and average error of the multi-impacts' localization are 9.2 mm and 7.4 mm, respectively.
authors: School of Control Science and Engineering, Shandong University, Jinan 250061, China. jiangmingshun@sdu.edu.cn.
authors: Mingshun
authors: M
authors: Jiang
authors: School of Control Science and Engineering, Shandong University, Jinan 250061, China. saiyaozhang@163.com.
authors: Yaozhang
authors: Y
authors: Sai
authors: School of Control Science and Engineering, Shandong University, Jinan 250061, China. sdugengxiangyi@163.com.
authors: Xiangyi
authors: X
authors: Geng
authors: School of Control Science and Engineering, Shandong University, Jinan 250061, China. qmsui@sdu.edu.cn.
authors: Qingmei
authors: Q
authors: Sui
authors: School of Control Science and Engineering, Shandong University, Jinan 250061, China. sduliuxiaohui@163.com.
authors: Xiaohui
authors: X
authors: Liu
authors: School of Control Science and Engineering, Shandong University, Jinan 250061, China. jialei@sdu.edu.cn.
authors: Lei
authors: L
authors: Jia
keywords: MUSIC algorithm; Shannon wavelet transform; fiber Bragg grating; multi-impact localization