Gabor小波时频分析在声发射信号处理中的应用  

Application of gabor wavelet time-frequency analysis in signal processing of acoustic emission

作　　者：龚仁荣[1] 顾建祖[1] 骆英[1] 柳祖亭[1] 

机构地区：[1]江苏大学理学院,江苏镇江212013

出　　处：《中国测试技术》2006年第1期76-79,共4页CHINA MEASUREMENT & TESTING TECHNOLOGY

基　　金：国家自然科学基金项目资助(50375069);江苏省教育厅"青蓝工程"

摘　　要：介绍Gabor小波时频分析的基本理论,用数值仿真举例验证Gabor小波时频分析可同时在时域和频域上来表征信号分布的特点。利用该方法可得到声发射源定位中传感器接收到的声发射信号在时域和频域上的分布,并用于区分声发射信号的传播模式和不同的信号组成,得到声发射波群的准确到达时间,从而提高时差定位的精度。This paper introduced the theory of Gabor wavelet time-frequency analysis and characteristics of expressing the signal of acoustic emission in time and frequency domain. An example of numerical simulation was given to demonstrate the characteristics of Gabor wavelet.The time-frequency distribution of acoustic emission signal received by a sensor can be got by this method.So different modes or different components of acoustic emission signal can be distinguished and accurate arrival time of wave group decided by the peak of Gabor wavelet transform can enhance the accuracy of acoustic emission source localization.

关 键 词：GABOR小波 时频分析 声发射 信号处理 

分 类 号：TG115.28[金属学及工艺—物理冶金]