关键词: 声发射, 金属管道, 泄漏信号, 声波衰减, 漏点定位

Abstract: The leakage acoustic wave on the leak is used to locate the water metal pipe line leakage. Accord- ing to generation mechanism of the metal pipeline leakage acoustic wave and the signal attenuation characteristic of leakage acoustic, we use the piezoelectric ceramic sensor together with the amplifying circuit in the simulation of water supply pipe for pipeline leakage experiment, and apply Audition and Origin softwares for experiment to ana- lyze the leakage acoustic signal. The experimental results show that the measurement of metal pipeline leakage a- coustic wave amplitude attenuation of signals is practicable for the detection of metal pipe leak location.

Key words: acoustic emission, water metal pipeline, breakage signal, sound attenuation, leak location