压力管道泄漏点的新型声发射定位研究

压力管道在泄漏时会产生声发射信号,根据此信号传播时声压遵从指数衰减规律,提出了一种利用声信号衰减特性和能量累计对管道泄漏点进行精确定位的新方法,并用多通道声发射仪以塑料管道和金属管道为介质、以压电换能器产生的信号为模拟泄漏信号进行了精确定位的试验验证,表明该方法可行并具有较好的定位精度。

Research on the New Acoustic Emission Location of the Leak Points of Pressure Pipelines

An acoustic emission signal could occur when pressure pipelines were leaking. A new method of using the attenuation characteristics and energy accumulation of the acoustic emission signal to locate precisely the leak points of pressure pipelines was proposed based on the law of acoustic pressure abiding by the index attenuation when the signal was transmitting, an accurately locating experiment was made by using multi-channel acoustic emission instrument with plastic pipelines as medium and the signals induced with a piezoelectric sender as analog leakage signals, the result shows that the method was feasible and precise.