传感技术学报2017，Vol.30Issue(8)：1215-1219,5.DOI:10.3969/j.issn.1004-1699.2017.08.015
基于morlet小波与模态分析的突发型声发射源定位研究
Study on the Location of Sudden Acoustic Emission SourcesBased on Morlet Wavelet and Modal Analysis
摘要
Abstract
On the basis of establishing a system for detecting the generation and expansion of cracks based on the acoustic emission technique,this paper took a steel plate as the experimental object to study the dispersion and multi-mode characteristics of Lamb wave propagating in a thin plate and proposed a method that recognizes the different modes generated when the acoustic emission signal propagates in the thin plate combining with morlet wavelet time-frequency joint.The position of the crack is located by extracting the time of different modes wave to the same sensor and according to the wave velocity corresponding to different modes wave.The experimental results show that the method can identify accurately A0,S0 mode wave,but also realize the accurately locating of acoustic emission source.关键词
Lamb波/morlet小波/时频分析/模态声发射/源定位Key words
Lamb wave/morlet wavelet/time-frequency analysis/modal acoustic emission/source localization分类
能源科技引用本文复制引用
王少锋,刘朋真,王道瑞,王建国..基于morlet小波与模态分析的突发型声发射源定位研究[J].传感技术学报,2017,30(8):1215-1219,5.基金项目
国家自然科学基金项目(51565047) （51565047）
内蒙古自治区自然科学基金项目(2015BS0511) （2015BS0511）
内蒙古自治区高等学校科学研究项目(NJZY154) （NJZY154）
