埋地水管泄漏信号采集与预处理系统设计

发布时间：2018-05-14 03:36

本文选题：埋地水管 + 泄漏检测　；参考：《西安科技大学》2015年硕士论文

【摘要】：长期以来,由于受到地理位置,气候条件,人口基数以及耕地面积等多方面的影响,我国成为了世界上水资源相对匮乏的国家之一。埋地水管是供水管网的重要组成部分,然而由于管道老化、腐蚀和误损破坏等情况引发的泄漏问题一直是城市节水工作中的难点顽疾。随着科技的发展进步,将微控制器应用,计算机网络与短距离通信技术结合起来为解决埋地水管泄漏检测提供了一种新的技术方法。本文结合埋地水管泄漏检测的原理,针对音听法、传统相关检漏法等信号检测技术存在的检测效率低下,数据可靠度有限及维护运行成本高等问题,提出了埋地水管泄漏检测系统的实现方案,在此基础上设计并实现了系统的泄漏检测终端功能。该终端主要由加速度传感器,信号调理器,数据处理器和移动电源等四部分组成。以通用性、稳定性较强的压电式加速度传感器作为前端采集器,通过信号调理器将采集的管道泄漏水声信号进行放大和滤波,生成高信噪比的标准数据送入数据处理器。数据处理器对此模拟信号进行A/D转换,FFT时频域转换并在LCD屏幕上实时显示结果,分析判定后确定泄漏情况。通过电路模拟及实地测试,该终端具有可靠性高,信号失真小、功耗低、安全性高和电路结构简单等特点,满足了当前管道环境下检漏设备的需求。
[Abstract]:For a long time, due to the influence of geographical location, climate conditions, population base and cultivated land area, China has become one of the countries with relatively scarce water resources in the world. Buried water pipe is an important part of water supply network. However, leakage caused by pipeline aging, corrosion and damage is always a difficult point in urban water-saving work. With the development of science and technology, the application of microcontroller, the combination of computer network and short distance communication technology provides a new technical method to solve the leakage detection of buried water pipes. Based on the principle of leak detection of buried water pipes, this paper aims at the problems of low detection efficiency, limited data reliability and high maintenance operation cost in signal detection techniques such as sound listening method, traditional correlation leak detection method, and so on. The realization scheme of leakage detection system of buried water pipe is put forward, and the leakage detection terminal function of the system is designed and realized on this basis. The terminal consists of four parts: acceleration sensor, signal regulator, data processor and mobile power supply. The piezoelectric accelerometer, which is universal and stable, is used as the front-end collector. The acoustic signal of pipeline leakage is amplified and filtered by signal regulator, and the standard data with high SNR is generated into the data processor. The data processor converts the analog signal in time and frequency domain by A / D converter and displays the results on the LCD screen in real time. After analyzing and judging the leakage situation is determined. Through circuit simulation and field test, the terminal has the characteristics of high reliability, low signal distortion, low power consumption, high security and simple circuit structure, which meets the needs of leak detection equipment in the current pipeline environment.
【学位授予单位】：西安科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU991.36;TP274.2

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