|
With the rapid development of China's economy , human demand for water sharp increase day by day , the safe operation of the aqueduct transport has become an extremely important task of the pipeline safety monitoring . Inevitably result in pipeline leak due to a number of natural factors and human factors , it will not only cause a serious waste of water resources , but also could threaten the safety of human life and property . Therefore, the study aqueduct leak detection and location , not only has important theoretical significance , but also has great practical value . Most of the pipeline leak detection and location using a single method uses a single approach has many drawbacks , a number of indicators can not take into account the system requirements , multi-sensor information fusion technology to effectively integrate a variety of methods , based on this idea , we information fusion technology for pipeline leak detection and location . In this paper, the status quo of the Yellow River Diversion Project aqueduct leak , pipeline leak detection and location , mainly for the following aspects: 1. Introduced the current domestic and international pipeline leak detection and location , and analyze a variety of the principle of the method as well as the advantages and disadvantages ; aqueduct system overall design, to infer the positioning formula and build the entire system diagram ; 3 . using wavelet analysis of pressure , flow signal after noise reduction , judged according to the different conditions of pressure, flow, changes in pipeline leak ; 4 and then were using wavelet analysis , correlation analysis to detect and locate the leak ; 5. Finally, the information fusion method Dempster-Shafer theory of evidence will be more than two the method of the three results were fused to locate the leak . The simulation results show that higher detection accuracy than a single detection method using the information fusion method , more accurate positioning .
|