【摘要】：給水管網(wǎng)的泄漏浪費(fèi)了大量的水資源，這不僅造成資源浪費(fèi)和經(jīng)濟(jì)損失，而且也帶來了一些次生災(zāi)害。因此，有必要加強(qiáng)管網(wǎng)漏水檢測，通過采用新技術(shù)和新設(shè)備來對漏點(diǎn)進(jìn)行及時(shí)準(zhǔn)確定位以降低系統(tǒng)管網(wǎng)漏損率。對漏水聲音信號的采集分析是漏水探測比較有效的方法，本課題研究了漏水聲音信號的采集放大以及數(shù)字濾波的實(shí)現(xiàn)方法，著重闡述了如何使用DSP技術(shù)對漏水聲音信號進(jìn)行數(shù)字化處理，，進(jìn)而實(shí)現(xiàn)一種基于DSP的數(shù)字式漏水探測系統(tǒng)。 本文首先闡述了漏水聲音信號的成因，并對它的特點(diǎn)進(jìn)行深入分析，進(jìn)而提出以DSP為系統(tǒng)核心來設(shè)計(jì)漏水探測系統(tǒng)，并論述它的工作原理和實(shí)現(xiàn)方法。進(jìn)一步描述了系統(tǒng)各個(gè)硬件模塊的設(shè)計(jì)，在硬件平臺上選用DSP和MCU雙引擎的dsPIC30F6014作為處理芯片進(jìn)行硬件電路設(shè)計(jì)，根據(jù)系統(tǒng)的需求任務(wù)來設(shè)計(jì)外圍電路，主要包括電源電路、時(shí)鐘電路、A/D音頻數(shù)據(jù)采集電路、LCD顯示輸出電路和音頻編解碼模塊電路等。最后完成DSP的數(shù)字式漏水探測系統(tǒng)硬件電路設(shè)計(jì)。 在軟件編程方面，文中詳細(xì)的闡述快速傅立葉變換（FFT）的算法和數(shù)字濾波器的設(shè)計(jì)，同時(shí)將其嵌入到DSP芯片中對漏水聲音信號進(jìn)行數(shù)字化處理。DSP的數(shù)字式漏水探測系統(tǒng)的主體程序采用基于圖形的SIMULNIK環(huán)境設(shè)計(jì)建立處理模型，利用SIMULNIK來開發(fā)產(chǎn)品比直接在MPLABIDE中編程方便快捷了很多，能夠提高效率，縮短開發(fā)周期。先通過SIMULNIK平臺進(jìn)行仿真驗(yàn)證，之后再使用DSP工具箱來將設(shè)計(jì)模型轉(zhuǎn)換生成C30源文件，在MPLABIDE中編譯、調(diào)試后生成目標(biāo)文件下載到目標(biāo)板中完成系統(tǒng)設(shè)計(jì)。 最后，該數(shù)字式漏水探測系統(tǒng)經(jīng)過軟硬件的設(shè)計(jì)與實(shí)現(xiàn)，滿足對漏水管道的準(zhǔn)確定位的設(shè)計(jì)要求，實(shí)現(xiàn)了設(shè)計(jì)的目標(biāo)。本課題在現(xiàn)有的技術(shù)和理論的前提下，將主要精力集中于具體應(yīng)用的研究與開發(fā)，并取得了一定的成果。該課題的完成，為測漏檢測領(lǐng)域提供了理論技術(shù)基礎(chǔ)，具有廣泛的實(shí)際應(yīng)用價(jià)值。
文內(nèi)圖片：
圖片說明：004~2008年我國管網(wǎng)漏損情況
[Abstract]:The leakage of water supply network wastes a lot of water resources, which not only results in waste of resources and economic losses, but also brings some secondary disasters. Therefore, it is necessary to strengthen the leakage detection of pipe network and reduce the leakage rate of system pipe network by using new technology and equipment to locate the leakage point in time and accurately. The acquisition and analysis of leaky sound signal is an effective method for leakage detection. In this paper, the acquisition and amplification of leaky sound signal and the realization of digital filtering are studied, and how to use DSP technology to digitize the leaky sound signal is emphasized, and then a digital leakage detection system based on DSP is realized. In this paper, the cause of formation of leakage sound signal is described, and its characteristics are deeply analyzed, and then the design of leakage detection system with DSP as the core of the system is put forward, and its working principle and realization method are discussed. The design of each hardware module of the system is further described. DSP and MCU dual engine dsPIC30F6014 are selected as processing chips on the hardware platform to design the hardware circuit. According to the requirements of the system, the peripheral circuits are designed, including power supply circuit, clock circuit, A / D audio data acquisition circuit, LCD display output circuit and audio coding and decoding module circuit. Finally, the hardware circuit design of DSP digital leakage detection system is completed. In the aspect of software programming, this paper expounds in detail the algorithm of fast Fourier transform (FFT) and the design of digital filter, and embeds it into DSP chip to process the leakage sound signal digitally. The main program of digital leakage detection system adopts graphic SIMULNIK environment design to establish processing model, and using SIMULNIK to develop products is much more convenient and faster than programming directly in MPLABIDE, and can improve efficiency. Shorten the development cycle. First, the simulation is carried out through SIMULNIK platform, and then the design model is transformed into C30 source file by using DSP toolbox, which is compiled in MPLABIDE, and then the target file is generated and downloaded to the target board to complete the system design. Finally, through the design and implementation of software and hardware, the digital leakage detection system meets the design requirements of accurate positioning of leakage pipeline, and realizes the design goal. On the premise of existing technology and theory, this paper focuses on the research and development of specific applications, and has achieved some results. The completion of this subject provides a theoretical and technical basis for leak detection and detection, and has a wide range of practical application value.
【學(xué)位授予單位】：內(nèi)蒙古師范大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2012
【分類號】：TP368.1;TP274

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