Buried pipeline suspended state distributed optical fiber monitoring device

The invention discloses a buried pipeline suspended state distributed optical fiber monitoring device and a monitoring method thereof, and belongs to the technical field of structural safety monitoring. The monitoring device comprises an optical fiber sensor and a data acquisition instrument, the optical fiber sensor is longitudinally parallel and fixed on the outer wall of a buried pipeline at positions equivalent to three points, nine points and twelve points of a clock, and longitudinal strain data of the pipeline are obtained through the optical fiber sensor; extracting bending strain data, and identifying the pipeline suspension position and length according to the suspension pipeline additional bending moment distribution characteristics. Compared with a traditional pipeline monitoring method, the method has the advantages of real-time monitoring, remote sensing and distributed measurement. According to the method, the strain distribution state of the whole length of the pipelinecan be obtained, the sus