文档介绍：上海交通大学硕士学位论文
摘要
城市地下水管道的漏水是造成水资源浪费的一个重要原因,随
着淡水资源的日益枯竭,管道漏水探测越来越受到人们的重视。对
漏水声音信号的采集分析是漏水探测最行之有效的方法,本文研究
了漏水声音信号的采集放大以及模拟滤波的实现方法,重点论述了
如何使用 DSP 对漏水声进行数字化处理,进而研制出一款基于 DSP
的数字式漏水探测仪。
本文首先论述了漏水声音信号产生的原因,对它的特性进行了
深入分析,并在此基础上,提出了以 DSP 为系统核心来设计漏水探
测仪,阐述了其工作原理和操作方法。
接着,详细论述了漏水探测系统各个硬件模块的设计思路、电
路结构和工作过程,同时还介绍了与其相关的电子元件和芯片的选
型、内部结构等,给出了具体的电路连接图。
快速傅立叶变换的算法和数字滤波器的设计在本文中有详细的
阐述,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。
通过图形和数值仿真工具 MATLAB 和 DSP S 验证
了算法和滤波器设计的合理性和正确性。
总体说来,本课题基于现有的技术和理论,在充分理解相关理
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。
关键词:DSP,漏水探测,数字信号处理,滤波
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上海交通大学硕士学位论文
ABSTRACT
In the city, water leakage in underground pipeline is one important
reason causing water waste. Along with fresh water resource increasingly
drying up, people pay more attention to water leakage. Collecting and
analyzing water leakage acoustic signal is the effective method on
pipeline leakage detection. This paper researches on collecting and
magnifying of water leakage acoustic signal and realization means of
analog filter. It focuses on how to use DSP to deal with sound of water
leakage in digital ways, and then develops digital water leakage detection
instrument based on DSP.
At first, the article discusses the reason of water leakage acoustic
signal, and deeply analyzes the characteristic of signal. Based on above
analysis, the paper introduces how to design water leakage apparatus with
DSP chip, which is as the process core, and expatiates its principle and
operation method.
Secondly, the design plan for every hardware module, circuit
configuration and work process of water leakage detection system are
discussed. Meanwhile, this paper introduces the interrelated electron
components’ choice, interior configuration and so on.
FFT arithmetic and digital filter design are detailedly dissertated,
and applied which in DSP chip to dispose water leakage acoustic signal in
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上海交通大学硕士学位论文
digital way. The article validates its rationality and correctness of
ar