Frequency Domain Analysis for Detecting Pipeline Leaks
Publication: Journal of Hydraulic Engineering
Volume 131, Issue 7
Abstract
This paper introduces leak detection methods that involve the injection of a fluid transient into the pipeline, with the resultant transient trace analyzed in the frequency domain. Two methods of leak detection using the frequency response of the pipeline are proposed. The inverse resonance method involves matching the modeled frequency responses to those observed to determine the leak parameters. The peak-sequencing method determines the region in which the leak is located by comparing the relative sizes between peaks in the frequency response diagram. It was found that a unique pattern was induced on the peaks of the frequency response for each specific location of the leak within the pipeline. The leak location can be determined by matching the observed pattern to patterns generated numerically within a lookup table. The procedure for extracting the linear frequency response diagram, including the optimum measurement position, the effect of unsteady friction, and the way in which the technique can be extended into pipeline networks, are also discussed within the paper.
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Acknowledgments
The material presented in this paper is made possible by the Australian Postgraduate Award, Adelaide Researcher Scholarship (National), and by funding from the Australian Research Council.
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Information
Published In
Journal of Hydraulic Engineering
Volume 131 • Issue 7 • July 2005
Pages: 596 - 604
Copyright
© 2005 ASCE.
History
Received: Oct 9, 2002
Accepted: Jul 21, 2004
Published online: Jul 1, 2005
Published in print: Jul 2005
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