Simultaneous distributed acoustic and temperature sensing for robust leakage detection in gas pipelines

We report a comprehensive study carried out for the robust detection of leakages in gas pipelines based on simultaneous distributed sensing of acoustics and temperature (DAS/DTS) due to the leakage event. The specific acoustic and temperature signatures corresponding to the leakage event have been simulated using a computational fluid dynamics (CFD) model. The detection of such signatures through a simultaneous DAS/DTS measurement system are then simulated using a numerical model of the DAS/DTS system. Finally, the simulation results are experimentally validated using controlled experiments over a 43 km long standard telecom-grade single-mode optical fiber cable (OFC) with a spatial resolution of 10 m.