供水管道泄漏声信号特性

Acoustic signal characteristic for water supply pipeline leakage

为了对供水管道泄漏声波信号进行检测,分析了管道泄漏声波的产生机理、检测原理和管道泄漏声波信号的频率特性及衰减特性.采用CS-3型水听器在模拟供水管道的环境中进行管道泄漏实验,采用MATLAB软件对实验采集到的泄漏声波信号进行分析.结果表明,管道泄漏的声波是6070 Hz的低频信号,其中稳定泄漏和末端泄漏的衰减特性不同,实验结果证明了管内听音技术用于检测供水管道泄漏信号的准确性和该检测技术的可行性.

In order to detect the acoustic signal of water supply pipeline leakage,the generating mechanism and detecting principle of pipeline leakage sound wave as well as the frequency and attenuation characteristics of pipeline leakage acoustic signal were analyzed.The pipeline leakage experiments were implemented in the simulated water supply pipeline using the CS-3 type hydrophone,and the leakage acoustic signals collected in the experiment were analyzed by MATLAB software.The results show that the sound wave of pipeline leakage is the low frequency signal of 60 to 70 Hz,where the attenuation characteristics of stable leakage and end leakage are different.The experimental results prove that the listening technology inside pipe is accurate for detecting the leakage signal of water supply pipeline and the detecting technology is feasible.