Fiber Bragg grating perimeter security system and method combined with strain information

A fiber grating, strain sensor technology, applied in the direction of anti-theft alarm, anti-theft alarm mechanical start, and alarm by breaking/disturbing the straightened rope/metal wire, etc., can solve the false alarm, damage, etc. Sensor response performance impact and other issues, to achieve the effect of increasing construction volume, ensuring stability and effectiveness, and flexible layout
CN105243772BActive Publication Date: 2017-10-24WUHAN WUTOS
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
WUHAN WUTOS
Publication Date
2017-10-24

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Abstract

The invention discloses a fiber grating perimeter security and protection system and method by combination with strain information. The system comprises a detection cable and a strain monitoring unit. A plurality of groups of sensors are connected in series to the detection cable; and each sensor group contains at least one fibber grating strain sensor and a fiber grating vibration sensor. The strain monitoring unit is connected with the fibber grating strain sensors of all sensor groups; and strain information of the fibber grating strain sensors is read at predetermined time intervals According to the invention, the fibber grating strain sensors and the fiber grating vibration sensors are integrated into one same cable without repeated installation, thereby reducing the construction load. The strain information is used as a basis for self adjustment of the vibration sensing system, thereby effectively eliminating an adverse effect on the system due to an aging phenomenon of a rail (wall) and thus guaranteeing long-term stability and effectiveness of the vibration monitoring and alarming system.
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Description

technical field

[0001] The invention relates to the technical field of optical fiber perimeter security, in particular to an optical fiber grating perimeter security system and method combined with strain information. Background technique

[0002] Fiber Bragg grating sensing technology is an advanced sensing technology developed in recent years. Compared with traditional electrical sensing technology, it has the advantages of on-site passive explosion-proof, weather-resistant and lightning-proof, flexible layout, long service life, and high sensitivity. Real-time monitoring of various physical parameters, including: strain, pressure, displacement, temperature, acceleration, etc., so it is very suitable for use in the field of perimeter security.

[0003] The existing fiber grating perimeter intrusion alarm system (CN101840615) mainly judges whether to alarm by analyzing the vibration wave acting on the fiber Bragg grating vibration sensor, so the vibration wave transmission ...

Claims

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