标题：Research on Spectrum Characteristics of Fiber Bragg Grating under Acoustic Emission Waves
作者：Pang, Dandan; Sui, Qingmei; Wang, Ming; Guo, Dongmei
作者机构：[Pang, Dandan; Wang, Ming] Shandong Jianzhu Univ, Sch Informat & Elect Engn, Jinan, Shandong, Peoples R China.; [Sui, Qingmei] Shandong Univ, Sch Co 更多
会议名称：Chinese Automation Congress (CAC)
会议日期：OCT 20-22, 2017
来源：2017 CHINESE AUTOMATION CONGRESS (CAC)
关键词：Fiber Bragg grating sensor; Spectrum analysis; Acoustic emission; detection technology; Damage identification
摘要：A fiber Bragg grating (FBG) acoustic emission (AE) sensing model is established and the cosine-Gauss function is used to simulate the dynamic strain field along the FBG generated by AE waves. The theoretical simulations show that there is a regular relation between the characteristics of FBG reflection spectrum and the parameters of AE wave. In order to verify the simulation results, a FBG AE sensing system is constructed with a narrow bandwidth laser and a novel FBG AE sensor is designed in this system. The data obtained from experiments fairly coincide with the simulation results. Therefore, a useful tool for damage identification and localization using AE waveform analysis is provided in this paper.