基于振幅衰减与相关检测相结合的地下管道漏点定位

Leak Location in Underground Pipelines Based on Amplitude Attenuation and Correlation Detection

为了快速、准确定位地下水管的漏水点,采用振幅衰减与相关检测相结合的方法进行研究.先利用高灵敏度的监听装置判断漏点大致位置,缩小漏点搜索范围;再用拾音探头采集漏水声波信号,根据声波振幅衰减与传播距离的关系快速定位.在振幅衰减法出现定位困难时,结合相关检测法准确定位.实验结果表明,该系统不仅适用不同的探测对象与环境,还能快速和准确地确定出漏点位置.

In order to rapidly and accurately locate the leakage point of underground water pipe, the method of amplitude attenuation and the correlation testing was adopted to study.First, the high sensitivity of listening device was used to minimize the search range and to determine the approximate location of leak.Then the sound of the leaking-out water was collected with pickup sensor.According to the relationship between amplitude attenuation and propagation distance, the leak was located rapidly.When the method of amplitude attenuation was unsuitable, it was combined with the correlation detection to locate the leak accurately.The experimental results showed that not only was the method suitable for different testing objects and environment,but also it was able to quickly and accurately judge the location of the leak.