Instantaneous phase and frequency for the detection of leaks and features in a pipeline system

摘要

This work focuses on the progress of a new analysis technique to detect pipeline leaks and features based on analysis of a pressure transient. The measured time domain signals of these transients were obtained using a single pressure transducer. The instantaneous phase and frequency of the signals are analyzed using the Hilbert transform (HT) and the Hilbert-Huang transform (HHT). Both simulated and experimental pressure signals were used to evaluate the performance of these transforms. The analysis of simulated signals allowed features in the pipeline network such as leaks and pipe ends to be ascribed to features in the signals. Analysis of the experimental tests corroborates the simulated test results when the HT and the HHT analysis are used.