关键词: 输油管道, 压力波, 泄漏检测, 泄漏定位, 小波变换, 信号处理

Abstract: The leakage of pipelines may result in the economic loss and serious environmental pollution.On the basis of the negative pressure mean wave velocity method,a new iterative algorithm for leakage orientation of oil pipelines was proposed by analyzing the transmitting characteristics of pressure wave and the defect of traditional formula for leakage orientation of pipelines.The proposed new algorithm is helpful to improve the orientation precision.The wavelet transformation was used to cancel the noises in the negative pressure signals and capture the strange point.The fairly precise time difference was obtained.The simulation results showed that the orientation precision of the proposed algorithm was better than the traditional method.

Key words: transportation pipeline, pressure wave, leakage detection, leakage orientation, wavelet transform, signal processing