埋地水管泄漏信號(hào)采集與預(yù)處理系統(tǒng)設(shè)計(jì)
本文選題:埋地水管 + 泄漏檢測(cè); 參考:《西安科技大學(xué)》2015年碩士論文
【摘要】:長(zhǎng)期以來(lái),由于受到地理位置,氣候條件,人口基數(shù)以及耕地面積等多方面的影響,我國(guó)成為了世界上水資源相對(duì)匱乏的國(guó)家之一。埋地水管是供水管網(wǎng)的重要組成部分,然而由于管道老化、腐蝕和誤損破壞等情況引發(fā)的泄漏問(wèn)題一直是城市節(jié)水工作中的難點(diǎn)頑疾。隨著科技的發(fā)展進(jìn)步,將微控制器應(yīng)用,計(jì)算機(jī)網(wǎng)絡(luò)與短距離通信技術(shù)結(jié)合起來(lái)為解決埋地水管泄漏檢測(cè)提供了一種新的技術(shù)方法。本文結(jié)合埋地水管泄漏檢測(cè)的原理,針對(duì)音聽(tīng)法、傳統(tǒng)相關(guān)檢漏法等信號(hào)檢測(cè)技術(shù)存在的檢測(cè)效率低下,數(shù)據(jù)可靠度有限及維護(hù)運(yùn)行成本高等問(wèn)題,提出了埋地水管泄漏檢測(cè)系統(tǒng)的實(shí)現(xiàn)方案,在此基礎(chǔ)上設(shè)計(jì)并實(shí)現(xiàn)了系統(tǒng)的泄漏檢測(cè)終端功能。該終端主要由加速度傳感器,信號(hào)調(diào)理器,數(shù)據(jù)處理器和移動(dòng)電源等四部分組成。以通用性、穩(wěn)定性較強(qiáng)的壓電式加速度傳感器作為前端采集器,通過(guò)信號(hào)調(diào)理器將采集的管道泄漏水聲信號(hào)進(jìn)行放大和濾波,生成高信噪比的標(biāo)準(zhǔn)數(shù)據(jù)送入數(shù)據(jù)處理器。數(shù)據(jù)處理器對(duì)此模擬信號(hào)進(jìn)行A/D轉(zhuǎn)換,FFT時(shí)頻域轉(zhuǎn)換并在LCD屏幕上實(shí)時(shí)顯示結(jié)果,分析判定后確定泄漏情況。通過(guò)電路模擬及實(shí)地測(cè)試,該終端具有可靠性高,信號(hào)失真小、功耗低、安全性高和電路結(jié)構(gòu)簡(jiǎn)單等特點(diǎn),滿(mǎn)足了當(dāng)前管道環(huán)境下檢漏設(shè)備的需求。
[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.
【學(xué)位授予單位】:西安科技大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2015
【分類(lèi)號(hào)】:TU991.36;TP274.2
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