Design And Realization Of Leakage Detection System On The Underwater Pipeline

Underwater long-distance transport of oil and gas in today’s society plays an importantrole. But, such things like pipeline leaking commonly occur. Therefore, detection andlocalization of leakage is of great significance. A leakage detection system has been designedin this thesis. Some functions of the system have been achieved.In this paper, the method using underwater robots to detect oil and gas pipeline leaksource, which is still developing in our country, has been analyzed and studied. Based on theresults of simulation experiments, the noise signal characteristics of leak source are got. Andthen a solution of leakage detection is devised. UUV marches along the pipeline. Leakagedetection system respectively enables single-channel and three-channel mode to detect andlocate leak source. Hydrophone array of three elements transmits sound signal to dataacquisition board which is replaced by RealARM6410development board and self-madecircuit board. Data disposed by data acquisition board is uploaded to server application, byUDP protocol, which processes and saves data and displays results and makes a judgment.Some researches in system parameter are also studied carefully. Dynamic range of inputsignal and frequency offset are tested, and ROC is also drawn. Through experiments,single-channel mode detection can identify the leakage signal in the hybrid noise withinterference. Three-channel mode can locate the leak source. The combination of the twomodels can complete the detection and location of leak source.