Monitoring method of distributed optical fiber sensing system

Abstract

The invention discloses a monitoring method of a distributed optical fiber sensing system. The monitoring method comprises the following steps of: S1, dividing a detection optical fiber into a key monitoring area and a non-key monitoring area according to an object to be detected; S2, in the process of monitoring optical fiber deployment, measuring and recording the length of each interval distribution ; S3, inputting the length of each interval distribution into a resolving system as an input parameter; S4, inputting the scanning frequency of each interval distribution into the resolving system, the scanning frequency of the key monitoring area being far greater than the scanning frequency of the non-key monitoring area; S5, enabling the resolving system to calculate the time when the light passes through each monitoring area, and switch the scanning frequency according to the time; and S6, enabling the resolving system to output peak variation so as to measure the strain and temperature variation of the to-be-measured object. According to the method of the invention, the data acquisition range and the data scanning frequency of the distributed optical fiber sensing system are reasonably adjusted, and the data calculation efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of intelligent monitoring, in particular to a monitoring method for a distributed optical fiber sensing system. Background technique [0002] Distributed fiber optic sensors are mainly used to monitor the temperature or deformation of large bridges and tunnels, long-distance transmission pipelines, engineering structures, and industrial production lines. Distributed fiber optic sensors have the advantages of long-distance measurement, but the long monitoring distance and accuracy requirements are inevitable. Increase the calculation amount of data solution in the distributed optical fiber sensing system and reduce the efficiency of measurement and calculation. At the same time, on the distributed optical fiber monitoring line, the monitoring volume at each monitoring point varies in different ranges, and the required monitoring resolutions are also different. For example, for key parts with relatively strict...

AI Technical Summary

Problems solved by technology

However, at present, the distributed optical fiber sensing system mostly adopts the uniform acquisition method, that is, the distributed optical fiber sensing system collects the whole data of the monitoring line according to its minimum resolution, and calculates and processes it; It causes a waste of computing resources in the distributed optical fiber sensing system, prolongs the monitoring time, and reduces the real-time performance of the distributed optical fiber sensing system in intelligent monitoring.

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