传感技术学报Issue(11)：1659-1663,5.DOI:10.3969/j.issn.1004-1699.2015.11.014
基于时间反转聚焦的声发射源定位算法
Location Algorithm for Source of Acoustic Emission Based on Time Reversal
摘要
Abstract
Because acoustic emission(AE)testing can judge the activity and severity of the damage,it has been widely used. But there is still no more accurate location method for damage source position. A method based on time reversal theory is proposed to accurately locate the acoustic emission source here. According to the characteristics of acoustic emission passive monitoring,the signal energy of acoustic emission could be overlapped and amplified by time reversal focusing method,and furthermore the signal to noise ratio(SNR)is improved,and then enhancing and focusing process are analyzed and deduced about signal from damage source processed by time reversal;The signal propagation wave image can be reconstructed by taking advantage of adaptive focusing of time reversal theory to the acoustic emission source,and the position of damage source is revealed through the signal focusing;And final⁃ly,the method has been verified through the numerical simulation,and simulation results show it can effectively im⁃prove signal energy of the damage source,and the position of the damage source can be shown accurately through signal reconstruction and location in the detection area,and the location accuracy is greatly improved by comparing with the conventional time-of-arrival location method.关键词
声发射检测/损伤定位/时间反转/聚焦增强Key words
AE testing/damage location/time reversal/focusing enhancement分类
通用工业技术引用本文复制引用
李秋锋,陈建娟,何才厚,张维,李帅辉,陈积乐..基于时间反转聚焦的声发射源定位算法[J].传感技术学报,2015,(11):1659-1663,5.基金项目
国家自然科学基金项目（11264032）；江西省自然科学基金项目（20122BAB201024）；国家质检总局科技计划项目（2013zjjz180）；航空科学基金项目（2014ZD56007）；上海航天科技创新基金项目（SAST201364）；江西省教育厅科技项目（GJJ14530）；无损检测技术教育部重点实验室开放基金项目 （）
