Pipeline Leakage Monitoring Technology of Distributed Optical Fiber Vibration Based on Multi-Dimensional Spatial Data Fusion Algorithm

Pipeline transportation safety is critical for guaranteeing the national economy and people's life, and pipeline leakage monitoring is significant for achieving pipeline transportation safety. This paper proposes a multi-dimensional spatial data fusion algorithm for pipeline leakage monitoring based on a distributed optical fiber vibration sensing ( DVS) system. The optical fiber sensing cable was fixed on the side of a pipeline, and the pipeline leakage signals were picked up by the DVS system. These pipeline leakage signals were averaged in the space-time domain based on the time window and spatial resolution, respectively. Finally, a suitable threshold was set to complete the pipeline leakage monitoring alarm. Single-point and multipoint pipeline leakages are tested in the experiment. The signal-to-noise ratio of the single-point pipeline leakage signal increases by 4. 5 dB, maximum single-point pipeline leakage alarm rate increases by 19. 53%, and maximum multipoint pipeline leakage alarm rate increases by 2. 29%. Notably, real-time monitoring and alarms for pipeline leakage under a pressure of 0. 2 MPa are achieved.