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Pipeline network features and leak detection by cross-correlation analysis of reflected waves

Beck, S.B.M., Curren, M.D., Sims, N.D. and Stanway, R. (2005) Pipeline network features and leak detection by cross-correlation analysis of reflected waves. Journal of Hydraulic Engineering, 131 (8). pp. 715-723. ISSN 07339429

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Abstract

This paper describes progress on a new technique to detect pipeline features and leaks using signal processing of a pressure wave measurement. Previous work (by the present authors) has shown that the analysis of pressure wave reflections in fluid pipe networks can be used to identify specific pipeline features such as open ends, closed ends, valves, junctions, and certain types of bends. It was demonstrated that by using an extension of cross-correlation analysis, the identification of features can be achieved using fewer sensors than are traditionally employed. The key to the effectiveness of the technique lies in the artificial generation of pressure waves using a solenoid valve, rather than relying upon natural sources of fluid excitation. This paper uses an enhanced signal processing technique to improve the detection of leaks. It is shown experimentally that features and leaks can be detected around a sharp bend and up to seven reflections from features/ leaks can be detected, by which time the wave has traveled over 95 m. The testing determined the position of a leak to within an accuracy of 5%, even when the location of the reflection from a leak is itself dispersed over a certain distance and, therefore, does not cause an exact reflection of the wave.

Item Type: Article
Copyright, Publisher and Additional Information: © 2005 ASCE. This is an author produced versison of a paper published in 'Journal of Hydraulic Engineering'. Uploaded in accordance with the publisher's self-archiving policy.
Keywords: Correlation Leakage Pipe networks Pipelines Transient flow Wave reflection Correlation methods Leak detection Leakage (fluid) Signal processing Pressure wave reflections pipe flow pipeline
Institution: The University of Sheffield
Academic Units: The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Mechanical Engineering (Sheffield)
Depositing User: Mr Christopher Hardwick
Date Deposited: 13 Aug 2009 10:57
Last Modified: 08 Feb 2013 16:58
Published Version: http://dx.doi.org/10.1061/(ASCE)0733-9429(2005)131...
Status: Published
Publisher: American Society of Civil Engineers
Refereed: Yes
Identification Number: 10.1061/(asce)0733-9429(2005)131:8(715)
URI: http://eprints.whiterose.ac.uk/id/eprint/9115

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