基于功率谱密度的地下水管道漏水点智能检测  

Intelligent Detection of Groundwater Pipeline Leakage Points Based on Power Spectral Density

作　　者：章以建[1] 徐晓琼 ZHANG Yi-jian;XU Xiao-qiong(Zhejiang University,Hangzhou Zhejiang 310027,China)

机构地区：[1]浙江大学,浙江杭州310027

出　　处：《计算机仿真》2024年第1期532-536,共5页Computer Simulation

摘　　要：为及时发现管道漏水问题,提高检测准确率,提出一种基于水声信号的地下水管道多漏水点检测方法。在地下水管道安装两个电压式加速度传感器,采集漏水信号,根据冲激响应函数、差分方程分析FIR滤波装置去噪原理,结合等波纹逼近、雷米兹算法设计其内部运算,完成漏水信号的去噪处理;使用功率谱密度描述信号频带分布情况,判断水管道是否漏水,若漏水,根据信号时延差及其在管道中的传播速度,确定漏水点位置。仿真结果表明,所提方法去噪效果好,能有效检测出水管道漏水点位置,且检测精度高,用时短,可广泛使用。In order to find the problem of pipeline leakage in time and improve the detection accuracy,a method of detecting multiple leakage points of underground water pipeline based on underwater acoustic signal is proposed.Two voltage-type acceleration sensors are installed in the underground water pipeline,to collect the water leakage signal,and the noise removal principle of FIR filter device is analyzed according to the impulse response function and difference equation,and its internal operation is designed in combination with the equal-wave approximation and Remez algorithm to complete the noise removal process of the water leakage signal;The power spectral density is used to describe the distribution of signal frequency band and judge whether the water pipeline is leaking.If there is leakage,the location of the leakage point is determined according to the signal delay difference and its propagation speed in the pipeline.The simulation results show that the proposed method has god noise removal effect,can effectively detect the location of water leakage point in the outlet pipe,and has high detection accuracy,short time,and can be widely used.

关 键 词：漏水信号采集 地下水管道 电压式加速度传感器 信号功率谱 漏水点定位 信号频带 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]