关键词: 管道泄漏, 检测, 动态压力变送器, 动态压力信号, 特征向量提取, 经验模态分解

Abstract:

A dynamic pressure transmitter for the long-distance oil and gas transmission pipeline was designed. The dynamic pressure transmitter can directly measure the dynamic change of pipeline pressure. In the pipeline leakage detection, the dynamic pressure transmitter has higher sensitivity than the general pressure transmitter to obtain the dynamic pressure signal along the pipeline. Then the detected signal was decomposed into a sum of finite intrinsic mode functions (IMF) by empirical mode decomposition (EMD). The normalized kurtosis value of the main IMF components was analyzed, and the eigenvectors of the detected signal could be extracted. The application examples show that the features of the signals resulted from pipeline leakage or operations of pump and valve can be extracted by the signal analysis method.

Key words: pipeline leakage, detection, dynamic pressure transmitter, dynamic pressure signal, eigenvector extraction, empirical mode decomposition