基于DSP技术的数字漏水检测系统的设计与实现

发布时间：2019-07-05 06:18

【摘要】：给水管网的泄漏浪费了大量的水资源，这不仅造成资源浪费和经济损失，而且也带来了一些次生灾害。因此，有必要加强管网漏水检测，通过采用新技术和新设备来对漏点进行及时准确定位以降低系统管网漏损率。对漏水声音信号的采集分析是漏水探测比较有效的方法，本课题研究了漏水声音信号的采集放大以及数字滤波的实现方法，着重阐述了如何使用DSP技术对漏水声音信号进行数字化处理，，进而实现一种基于DSP的数字式漏水探测系统。本文首先阐述了漏水声音信号的成因，并对它的特点进行深入分析，进而提出以DSP为系统核心来设计漏水探测系统，并论述它的工作原理和实现方法。进一步描述了系统各个硬件模块的设计，在硬件平台上选用DSP和MCU双引擎的dsPIC30F6014作为处理芯片进行硬件电路设计，根据系统的需求任务来设计外围电路，主要包括电源电路、时钟电路、A/D音频数据采集电路、LCD显示输出电路和音频编解码模块电路等。最后完成DSP的数字式漏水探测系统硬件电路设计。在软件编程方面，文中详细的阐述快速傅立叶变换（FFT）的算法和数字滤波器的设计，同时将其嵌入到DSP芯片中对漏水声音信号进行数字化处理。DSP的数字式漏水探测系统的主体程序采用基于图形的SIMULNIK环境设计建立处理模型，利用SIMULNIK来开发产品比直接在MPLABIDE中编程方便快捷了很多，能够提高效率，缩短开发周期。先通过SIMULNIK平台进行仿真验证，之后再使用DSP工具箱来将设计模型转换生成C30源文件，在MPLABIDE中编译、调试后生成目标文件下载到目标板中完成系统设计。最后，该数字式漏水探测系统经过软硬件的设计与实现，满足对漏水管道的准确定位的设计要求，实现了设计的目标。本课题在现有的技术和理论的前提下，将主要精力集中于具体应用的研究与开发，并取得了一定的成果。该课题的完成，为测漏检测领域提供了理论技术基础，具有广泛的实际应用价值。
文内图片：

图片说明：004~2008年我国管网漏损情况
[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.
【学位授予单位】：内蒙古师范大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TP368.1;TP274

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