关键词: 管道, 泄漏, 定位, 压力波, 小波变换

Abstract: Leak detection is a significant part of pipeline malfunctions detection. It is required to detect the occurrence of leak immediately and to locate the exact leaking position. Heating is needed during long transportation of crude oil, and the shortage of the traditional instantaneous pressure wave location method is described. The effect of fluid temperature difference along the pipeline on the fluid pressure wave velocity inside the pipeline is investigated. A new pressure wave leak point instantaneous location method is presented. The wavelet transform is used to get the featured inflection point of pressure wave. The new location method increases the accuracy of leak location.

Key words: pipeline, leak, location, pressure wave, wavelet transform