摘要
声发射检测的目的是获得声发射源的有关信息 (如声发射源的特征和位置等 )。管道泄漏声发射信号既携带结构的某些特征信息 (泄漏孔大小和位置等 ) ,同时又有很大的随机性和不确定性 ,属于一种非平稳随机信号。在分析管道泄漏声发射信号特点基础上 ,着重对管道声发射泄漏检测技术及信号处理方法的最新研究进展进行了回顾。模态声发射能够解决常规声发射技术发展中的问题 。
The aim of AE (acoustic emission) testing is to obtain the information of AE source (source character and location etc). The AE signals of pipeline leak carry the information of structure integrity (the dimension and location of leak), which are random and uncertain, and belong to non stationary signals. The state of the art of acoustic emission techniques for pipeline leak detection and signal processing has been reviewed based on the AE signal character of pipeline leak. Modal acoustic emission may be used to solve the problems in the development of conventional AE technique, and is a potential technique for the realization of quantitative pipeline leak detection.
出处
《无损检测》
2003年第10期519-523,共5页
Nondestructive Testing
基金
国家自然科学基金资助项目 ( 19972 0 0 3 )
北京市重点基金资助项目 ( 3 0 110 0 1)
关键词
声发射检测
管道
泄漏
信号处理
综述
Acoustic emission testing
Pipeline
Leak
Signal processing
Survey
