The Design Of Pipeline Leak Detector Based On The Wireless Transmission

The waste of water resources is very serious in China,the leakage of water pipe can also cause some waste.In order to avoid unnecessary waste,we should study some technologies for the leakage detection of water pipe.The water leakage detector is designed in this paper which adopts two piezoelectric sensor probes to collect sound signals of leaking,and then send digital signals of being transformed to the host module through their own wireless transmission module.And the related algorithms will be used to calculate the location of leakage point which will be displayed in the LED after two voice signals being filtered processing.This design mainly includes two parts-the wireless transmission module and the host module.At the wireless transmission part,the CC2530 is adopted to be the core chip.The signals should be converted in A/D before being transformed,and then send them to the host through CC2530 RF,in which there is a receiving module to receive data.A ZigBee network,which can achieve the function of receiving and sending data,is consist of a receiving module and two delivery modules.After the hardware and software are designed,using MATLAB to simulate leakage signals,and import them into the wireless sending module for testing the function of wireless transmission module.The data is transmitted successfully after being tested.The DSPIC30F6014 A is adopted as the core chip of the host,which connects with the receiving module through using asynchronous serial port to realize the data's transmission.The host will achieve these functions: filtering signals,computing the related algorithms and displaying the leakage signal on the LCD,etc.The purpose of filtering signals with wavelet filtering and adaptive filtering is to filter out the different types of noise,using the related algorithms for the two road signals and calculating the position of the leakage point according to the maximum of correlation functions after filtering,and then the leakage position finally is displayed through the LCD.The structure of this paper is divided into six chapters.The first chapter is introduction where the background,significance,status,contents and structure of this topic are introduced.The second chapter firstly includes the overall scheme of the design,then the design scheme is introduced from the two aspects of the wireless module and the host module,and also some theories in the design are introduced.The third chapter is about the system of hardware is designed,including the wireless sending module and the host module.The fourth chapter is the software's design,the wireless transmission module and the host module are included.The fifth chapter is testing the two modules,it turned out that the design scheme is correct.The sixth chapter summarized the research contents of this design,the shortage of the research and the research direction in the future.