基于迭代递推的供水管道多泄漏点声定位方法

Acoustic diagnosis method for multiple leakages location in a water transmission pipeline based on iterative recursion

针对多泄漏点产生的声发射信号及环境噪声对供水管道泄漏定位的影响,进行供水管道多泄漏点声定位方法研究。发展了一种基于迭代递推的供水管道多泄漏点声定位方法,研究迭代递推中品质因数阈值、信噪比阈值、相位偏移量的寻优区间和泄漏相关时频点的判定阈值等参数选择对泄漏定位效果的影响,并优选出适合的参数值。在此基础上,进行供水管道多漏点检测实验;结果表明,该方法可以实现管道上多个泄漏检测和定位,且定位误差小于1 m。研究工作为实际供水管道多泄漏点检测及定位提供了可行的解决方案。

In view of the inaccuracy of the traditional leakage location method caused by the interaction between the leakage noises at leakage points, a multi-leakage point location algorithm based on iterative recursion was developed. The influences of the threshold signal to noise ratio and the iteration termination condition on the performance of the algorithm were analysed, and the input parameters were optimized. The experiments results prove that the algorithm can be used to estimate the number and position of leakage points in a pipeline, with an error less than 1 m. The study provides a feasible solution for the detection and location of multiple leakage points in practical engineering pipelines.