Journal
JOURNAL OF APPLIED GEOPHYSICS
Volume 70, Issue 3, Pages 226-236Publisher
ELSEVIER
DOI: 10.1016/j.jappgeo.2010.01.003
Keywords
Ground penetrating sensor; Continuous Wave (CW) sensor; Water leak detection; Doppler frequency shift
Funding
- LEAKING (GROWTH PROGRAMME [GRD1-2001-40284]
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An innovative sensor technique has been developed to detect water leaks in supply pipes, especially in cases where the existing prevailing methods do not offer reliable solution, such as in PVC pipelines or for minor leaks. The presented system uses a Continuous Wave (CW) Doppler sensing unit operating at 2.45 GHz, consisting of a low power transmitter, a homodyne receiver and a digital signal processing unit. The operation principle is the detection of the Doppler frequency shift of the reflected electromagnetic wave by slightly moving water that leaks out of a pipe. A first prototype has already been developed and tested in test sites as well as in real water leaking conditions. The system has additionally been compared to the commercially available water leaking methods, verifying its reliability and accuracy in the detection of water leaks. (C) 2010 Elsevier B.V. All rights reserved.
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