摘要
针对供水管道泄漏信号检测与泄漏点定位问题,设计了一种基于压电加速度传感器的供水管道泄漏信号检测系统。检测系统由两个振动信号采集终端和基于MATLAB的上位机软件组成。从泄漏信号特点出发,对振动信号采集终端的前置信号转换电路、带通滤波电路和ADC数据采集电路进行了分析和设计。同时,对单片机程序和上位机软件的设计原理和功能进行了分析说明。采用VC-02振动校准仪和模拟供水管网,对系统的微弱振动信号采集功能和泄漏点定位功能进行了测试。测试结果表明,系统能准确采集加速度不低于0.01 g(1 g=9.80 m/s^(2))的微弱振动信号,对10 m长的UPVC管道进行泄漏点定位的最大相对误差为3.97%,平均相对误差为3.51%。
Aiming at the problem of water supply pipeline leakage signal detection and leakage point location,a leakage signal detection system for water supply pipeline is designed.The system is composed of two vibration signal acquisition terminals and upper computer software based on MATLAB.Based on the characteristics of leakage signal,the pre signal conversion circuit,band-pass filter circuit and ADC data acquisition circuit of vibration signal acquisition terminal are analyzed and designed.At the same time,the design principle and function of MCU program and upper computer software are analyzed and explained.VC-02 vibration calibrator and simulated water supply network are used to test the system functions of weak vibration signal acquisition and leakage point location.The test results show that the system can accurately collect the weak vibration signal with acceleration not less than 0.01 g(1 g=9.80 m/s^(2)).The maximum relative error of locating the leakage point of 10 m UPVC pipeline is 3.97%,and the average relative error is 3.51%.
作者
肖梓铭
赵文龙
娄嘉骏
Xiao Ziming;Zhao Wenlong;Lou Jiajun(College of Information Engineering,Nanchang Hangkong University,Nanchang 330063,China;Ningbo Water Meter(Group)Co.,Ltd.,Ningbo 315032,China)
出处
《电子测量技术》
北大核心
2021年第24期85-90,共6页
Electronic Measurement Technology
关键词
管道泄漏
振动信号采集
压电加速度传感器
单片机
泄漏点定位
pipeline leakage
vibration signal acquisition
piezoelectric acceleration sensor
single-chip microcomputer
leak point location
作者简介
肖梓铭,硕士研究生,主要研究方向为嵌入式技术及应用。E-mail:15970639236@163.com;赵文龙,工学硕士,教授,主要研究方向为嵌入式技术及应用、智能控制。E-mail:zhaowenlong@nchu.edu.cn;娄嘉骏,工学博士,主要研究方向为智能仪表、物联网技术及应用。E-mail:jjlou@163.com。
