Research on Pipeline Leak Detection Based on Hilbert-Huang Transform

A new time-frequency analysis method of Hilbert-Huang transform applied in Pipeline leak detection is proposed. Choosing the negative pressure wave signal from dynamic pressure transmitter as research object, the dynamic pressure signal is decomposed by the empirical mode decomposition, and we obtain the proper mode functions that satisfy the condition. The propagation time difference is detected accurately. Then, negative pressure wave signals are processed by Hilbert-Huang transformation method, so as to realize the accurate location of pipeline leak point. The results of experiment show that the new approach can improve the accuracy of detection and location of pipeline leak point.