Optical fiber distributed type monitoring method for long-distance conduit wiring safe monitoring and its device
An optical fiber distributed and safety monitoring technology, applied in the pipeline system, gas/liquid distribution and storage, mechanical equipment, etc., to achieve high detection sensitivity, high positioning accuracy, and wide application
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[0031] The automatic monitoring method for long-distance pipeline safety of the present invention uses single-mode optical fiber cables laid in parallel with the pipeline near the pipeline as distributed optical fiber sensing elements, and when an external force acts on the optical fiber, the transmission characteristics of the optical fiber will change , using optical fiber interferometry to perceive the weak effect and influence of external events on pipelines and optical cables, and then use frequency spectrum analysis to extract the frequency domain characteristics of the external event, based on which the location of the event can be judged. Utilize computer database technology to accumulate, collate and analyze event types and issue different levels of alarms.
[0032] Embodiments of the present invention are as follows:
[0033] 1. Lay two single-mode optical fiber cables in parallel with the pipeline near the pipeline as distributed op...
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