Research on Active Thermal Based Distributed Fiber Optic Temperature Sensing for Leakage Detection in Water Pipeline
Publication: Earth and Space 2021
ABSTRACT
Leakage loss of urban water pipelines is a common problem, which causes tremendous waste of water resources and great economic loss. Due to the long distance and complicated pipeline network, the existing technologies cannot effectively realize the leakage detection and localization of the whole pipeline network. In this research, the feasibility of leakage detection and localization in water pipelines was demonstrated based on active thermal method and distributed fiber optic temperature-sensing technology. In the proposed method, the sensing element was a thermal cable that was fabricated by coupling the heating element with the distributed fiber optic temperature sensing element. The thermal cable was buried under the pipeline. On account of the different heat transfer characteristics of heated thermal cable in soil and water environments, the conduction in soil and convection in water, respectively, the leakage and nonleakage locations can be identified. Numerical simulations and experiments were conducted to verify the feasibility of the proposed method for leakage detection. Good agreement has been achieved.
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Earth and Space 2021
Pages: 352 - 358
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© 2021 American Society of Civil Engineers.
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Published online: Apr 15, 2021
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