Design Of Wireless Monitoring System For Water Pipeline Based On Negative Pressure Wave And Strain Measurement

The diversion works are essential for the development of economy; however, there are many reasons, such as the distinguished geology the pipeline has to get through, the complex and varied environment, and the improper maintenance of pipeline, which would cause the leakage and explosion of the pipeline. Not only do those awful situations lead to the huge damage of economy, but also those can waste the tons of water. For the sake of the security of pipeline, the monitoring technique is rather important. Recently, there exist many drawbacks in our country, compared with the abroad advanced technique, hence, a newly wireless pipeline monitoring system is needed for addressing those problems. Basing on negtive pressure wave and the measuring method of strain, this article had designed a set of the wireless pipeline monitoring system towards the diversion system, and set up a model in our lab, and the good feasibility of the system has been proved through the various data getting from the pipeline model.The main content of this article are displayed below:(1)The overall design of the wireless detection system basing on negative pressure wave and strain measurement of diversion pipe: according to the actual needs of water diversion pipe wireless detection system and the domestic and abroad researches, the basic principles of pipeline detection are analyzed, the overall scheme of the system is designed, the function of each component is designed.(2)The design and implementation of hardware: the different function circuit in the system had been designed and implemented. The system contains data acquisition module, data processing module, data transceiver module and power module. The schematic diagram of each module had been designed and a brief analysis had been made. The module hierarchical design has been implemented towards the circuit. Without influencing the function of the circuit board, the size of the circuit board has been minimized which implements the miniaturization.(3)The design and implementation of software: the different function software had been designed and implemented. The principle of forming a network using ZigBee had been analyzed. The software flow chart of nodes joining the network and the coordinators forming the networks has been designed. The software flow chart of time synchronization has been introduced and analyzed. In the procedure of data acquisition, the flow chart of coordinators and nodes is designed and a brief analysis has been made. The software flow chart of upper computer had been designed through its function and the software function has been implemented.(4)The test of system: the wirelessly testing system has been tested through the pipeline model in the lab. The various data wave has been gathered. The performances such as the reliability of wireless communication, the accuracy of time synchronization and the feasibility of locating of leakage through negtive pressure wave and strain measurement has been tested, the results prove the feasibility of the system.