Research Of Detection And Orientation Technology Of Pipeline Leak Signal

Pipeline technology has particular advantage in transporting liquid such as petroleum and natural gas. But in recent years, leakage became the primary malfunction in transporting-oil pipe running. Leakage accident happened frequently because of stiletto steal and decay in the pipeline. It interfered in natural production badly, and brought the enormous economic losing and the pollution of the environment, so the research and application of the leak detecting system of transporting-oil pipe becomes the urgent problem. Advanced technology of leak automatic detecting of pipeline can discover the leak duly, and then take action rapidly. It may reduce the happening of steal case, and have obvious economic and social benefit.The dissertation brings forward the collectivity project of the negative pressure wave leak detecting system based on data transfer of wireless spread spectrum network after researching and analyzing all kinds of leak detecting technology of pipeline and special need on the leak detecting system of transporting-oil pipe brought by Daqing petroleum company. And then, the dissertation expatiates on network design project and equipment select of wireless spread spectrum network used to transmit pressure data after lucubrating on technology of wireless LAN and spread spectrum communications. As the same time, the dissertation analyzes the correlative capability of network. The dissertation researches the key technology of leak detecting system, viz. Real-time analyze of leakage signal, and brings forward the effective processing measure of leak detecting signal aiming at the character of the special signal and capability demand of the system. The measure includes filtering measure of leak detecting negative pressure wave signal and identifying and orientation of leakage detecting negative pressure wave. The dissertation deals with the storage management of leak detecting pressure data and Real-time display of pressure wave.