Experimental study on leakage monitoring of buried water pipelines based on actively heated optical frequency domain reflection technology

Abstract

The leakage of the buried water pipelines will not only cause waste of water resources, but also cause secondary disasters that will endanger the safety of life and property of residents along the pipeline. Therefore, leakage monitoring is crucial for buried water pipelines. In this study, based on the active heated fibre optic optical frequency domain reflectometry (AHFO-OFDR), the buried water pipelines leakage monitoring test considering the influence of leakage size, flow velocity and other factors was carried out, and the corresponding finite element numerical model was established to verify the reliability of the test results. The research results show that the AHFO-OFDR technology can realize the accurate positioning of the pipeline leakage point and the leakage quantity and leakage velocity can be roughly judged. The relevant conclusions are consistent with the numerical simulation results, so it is considered that the experimental results obtained by AHFO-OFDR have high accuracy.