Digital Instrument Of Detecting Water Leakage Based On DSP

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 digital way. The article validates its rationality and correctness of arithmetic and filter via graphics and emulator tool MATLAB and DSP debug tool CCS.To sum up, based on existing technique and theory, this article focus mainly on research and development of detailed application on fully understanding correlative theory, and a certain extent achievement has got.