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Perimeter security system and signal processing method based on fiber grating strain sensor

A technology of strain sensor and optical fiber grating, which is applied in the direction of instruments, alarms, anti-theft alarms, etc., can solve the problems of frequent false alarms in vibration monitoring and alarm systems, and achieve long-distance real-time strain monitoring and avoid interference effects

Active Publication Date: 2019-06-28
WUHAN WUTOS
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a perimeter security system and signal processing based on a fiber grating strain sensor that can avoid false alarms in view of the defect that the perimeter security system in the prior art is likely to cause frequent false alarms in the vibration monitoring and alarm system method

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  • Perimeter security system and signal processing method based on fiber grating strain sensor
  • Perimeter security system and signal processing method based on fiber grating strain sensor
  • Perimeter security system and signal processing method based on fiber grating strain sensor

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Embodiment Construction

[0028] 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.

[0029] Such as figure 1 As shown, the perimeter security system based on FBG strain sensors in this embodiment of the present invention includes a plurality of FBG strain sensors 10 , fence wire ropes 30 , FBG signal demodulator 40 and alarm management computer 50 .

[0030] Fence wire ropes 30 are fixed on several pillars 20 of the fence, and can be fixed through the wire rope fixing points 20 arranged on the pillars 20 .

[0031] The FBG strain sensor 10 is connected with the fence steel wire rope 30 and fixed on the pillar 20 ; the FBG strain sensor 10 belonging to the same channel is connected...

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Abstract

The present invention discloses a fiber grating strain sensor-based perimeter security system and a signal processing method. The system comprises enclosing wall steel wire ropes fixed on a plurality of pillars of an enclosing wall; fiber grating strain sensors connected with the enclosing wall steel wire ropes and fixed on the pillars, wherein fiber grating strain sensors in the same channel are connected in series onto one fiber optic cable; a fiber grating signal demodulator and an alarm management computer. Each fiber grating strain sensor comprises a main shaft, a rotating space cam, a differential spring mechanism and equal-strength strain sheets. The fiber grating signal demodulator is connected with fiber optic cables and is used for sending the signals of the fiber grating strain sensors to the alarm management computer. The alarm management computer analyzes and processes received signals and then conducts the alarming operation according to the analysis result.

Description

technical field [0001] The invention relates to the technical field of optical fiber perimeter security, in particular to a perimeter security system and a signal processing method based on a fiber grating strain sensor. 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, temperature, acceleration, etc., so it is very suitable for application in the field of perimeter security. [0003] The existing fiber grating perimeter intrusion alarm system mainly judges whether to alarm by analyzing the vibration wave acting on the fiber bragg grating vibration sensor, so the transmission characteristics of the vibration wave of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G08B13/12
CPCG08B13/124
Inventor 杨玥何光辉董雷
Owner WUHAN WUTOS
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