ID:
publications-3891
Type:
article
Year:
2005
Authors:
Covas, DΓÂdia and Covas, DΓÂdia and Ramos, Helena M. and Ramos, Helena M. and de Almeida, AntΓ³nio BetΓΆmio and de Almeida, A. BetΓΆmio
Title:
Standing Wave Difference Method for Leak Detection in Pipeline Systems
Venue/Journal:
Journal of Hydraulic Engineering
DOI:
10.1061/(asce)0733-9429(2005)131:12(1106)
Research type:
Water System:
Technical Focus:
Abstract:
The current paper focuses on leakage detection in pipe systems by means of the standing wave difference method (SWDM) used for cable fault location in electrical engineering. This method is based on the generation of a steady-oscillatory flow in a pipe system, by the sinusoidal maneuver of a valve, and the analysis of the frequency response of the system for a certain range of oscillatory frequencies. The SWDM is applied to several configurations of pipe systems with different leak locations and sizes. A leak creates a resonance effect in the pressure signal with a secondary superimposed standing wave. The pressure measurement and the spectral analysis of the maximum pressure amplitude at the excitation site enable the identification of the leak frequencies and, consequently, the estimation of the leak approximate location. Practical difficulties of implementation of this technique in real life systems are discussed.
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