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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

Active Publication Date: 2017-10-24
WUHAN WUTOS
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Problems solved by technology

As time goes by, the protective fence (wall) may be aged, damaged or even collapsed in varying degrees, which will lead to changes in the stress state of the installation medium of the fiber grating vibration sensor, which will affect the response performance of the sensor to the external vibration source. , which may lead to frequent false alarms or failure of the vibration monitoring and alarm system
[0004] The aging phenomenon of the protective fence (wall) is unavoidable, but it will adversely affect the performance of the fiber grating vibration monitoring and alarm system

Method used

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

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Embodiment Construction

[0031] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0032] The embodiment of the present invention combines the fiber grating perimeter security system with strain information, such as figure 1 shown, including:

[0033] Detect optical cables, install on fences (walls), or other places that require security.

[0034] Multiple sets of sensors are connected in series on the detection optical cable. The optical fiber grating strain sensor and the optical fiber grating vibration sensor can be spaced from each other in sequence and connected in series in the detection optical cable. A fiber grating strain sensor and a fiber grating vibration sensor ca...

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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.

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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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G08B13/12
CPCG08B13/124
Inventor 杨玥刘军荣董雷熊岩王丹印新达
Owner WUHAN WUTOS
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