声发射信号的激光检测和分析

泄漏信号可以看成一种声发射源,通过传感器对它进行采集和分析可以获取泄漏的特点。提出采用激光传感器(激光测振仪)和信号采集系统,通过非接触方式采集用来模拟压力容器的易拉罐的泄漏信号,对采集到的信号进行短时傅立叶变换得到泄漏的特征。实验结果表明激光传感器对泄漏信号进行检测是可行的。

AE Signal Detection of Laser and Analysis

Leakage signal can be thought as one kind of Acoustic Emission(AE) signal.Leakage feature can be found by acquisition and analysis of this signal.This article proposed a non-contacting method,using laser sensor(also called laser vibration meter) and signal acquisition equipment,to acquire the signal of leakage of a zip-top to simulate the pressure vessel.Short Time Fourier Transform(STFT) of the acquired signal was then conducted to get the feature of the leakage signal.Experiment results show that it is feasible to detect leakage of pressure vessel using Laser sensor.