Alarm strategy automatic adjustment method and system for optical fiber grating perimeter security protection system

Abstract

The invention discloses an alarm strategy automatic adjustment method and system for an optical fiber grating perimeter security protection system. The method includes the following steps that: S1, the trigger recording variables of sensing units in the optical fiber grating perimeter security system are initialized; S2, demodulated external vibration signals are received; S3, judgment is carriedout according to the demodulated external vibration signals, if at a certain moment, the signal disturbance range of a certain sensing unit exceeds a threshold, the sensing unit is triggered; S4, information in the trigger recording variable of the triggered sensing unit is updated; S5, a corresponding alarm strategy is automatically assigned to the triggered sensing unit according to the number of the times of the cumulative triggering of the triggered sensing unit in a previous period, if a corresponding alarm condition is met after calculation is performed, and alarm information is outputted. With the alarm strategy automatic adjustment method and system of the invention adopted, high-sensitivity alarm in a quiet environment can be realized; and the strictness of alarm judgment in an environment with large disturbance such as wind and rain can be improved. The alarm strategy automatic adjustment method and system are suitable for a windy environment, can improve an alarm accuracy rate, and reduce wind and rain false alarm rates.

Description

technical field [0001] The invention relates to the technical field of optical fiber perimeter security, in particular to an automatic adjustment method and system for an alarm strategy of an optical fiber grating perimeter security system. Background technique [0002] Fiber Bragg grating sensing technology has the advantages of on-site passive explosion-proof, weather resistance and lightning protection, flexible layout, long service life, high sensitivity, and can detect vibration sensitively, so it is very suitable for the field of perimeter security. [0003] The fiber Bragg grating perimeter intrusion alarm system judges whether to alarm by analyzing the vibration waves acting on the fiber Bragg grating vibration sensor. Patent 201110423977.0 identifies wind and rain signals through spectrum calculation and analysis. Patent 201210431154.7 identifies wind and rain signals through time-domain envelope analysis. The above methods always use the same alarm strategy for s...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide an automatic adjustment of the alarm strategy of the fiber grating perimeter security system that can adapt to different environments and improve the accuracy of the alarm in view of the defect that the alarm strategy of the security system in the prior art cannot be automatically adjusted according to the change of the environment method

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