管道声发射检测配套技术实验研究

Study on Matching Technique of Acoustic Emission Testing on Pipeline

在实验室条件下,建立了一套超声―声发射检测实验系统。在不同缺陷情况下,对超声波传播特性进行实验研究。利用STFT和小波分析技术对检测到的信号进行了分析,结果表明,可以利用超声波技术来对管道声发射检测到的缺陷进行更精确的定位,并能获得更多的缺陷信息,为工程应用奠定了基础。

An experimental system is set up in a laboratory which is based on ultrasonic-acoustic emission inspection.Propagation characteristics of ultrasonic waves are studied under several defect conditions. The signals from the testing are analyzed with STFT and wavelet analysis methods. The result shows that the defects detected by AET can be located exactly with ultrasonic method,and that with UT we can get more defect information,which set up the basis for engineering application.