Pressure-sensitive type fiber sensing device for perimeter security protection

An optical fiber sensing and optical fiber technology, which is applied in the direction of using optical devices to transmit sensing components, optical device exploration, and pressure-dependent alarms, etc. and other problems, to achieve the effect of high practical value, flexible use, and improved test sensitivity

Inactive Publication Date: 2012-07-11
XIAN JINHE OPTICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] There are many types of perimeter monitoring devices, but most of them are not popular due to the price, usage and maintenance costs. The most common perimeter monitoring systems are infrared perimeter monitoring systems and video monitoring systems.
The former is widely used because of its low price and high cost performance, but its disadvantages are short service life, greater influence from various environments, and fre

Method used

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  • Pressure-sensitive type fiber sensing device for perimeter security protection
  • Pressure-sensitive type fiber sensing device for perimeter security protection
  • Pressure-sensitive type fiber sensing device for perimeter security protection

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Such as figure 1 , figure 2 with image 3 A pressure-sensitive optical fiber sensing device for perimeter security is shown, including at least one optical fiber bending sensitive element arranged under the pavement slab 3 and embedded in the soil layer 2, and all optical fiber bending sensitive elements contain signal optical fibers 33 , and when there are two or more optical fiber bending sensitive elements, the signal optical fiber 33 in the optical fiber bending sensitive element is connected in series through the optical cable 1, at least one end of the optical cable 1 is connected with a test unit 5, and the test unit 5 is connected with Processing unit 7, described processing unit 7 is connected with alarm 22 and camera 23; Described optical fiber bending sensitive element comprises a guide rod 8 and the housing 9 that slides with guide rod 8, and guide rod 8 one end is connected with road slab 3 The lower bottom surface is a contact fit, and the other end of ...

Embodiment 2

[0050] Such as Figure 4 , Figure 5 As shown, in this embodiment, the difference from Embodiment 1 is that the curved support is a spring 38, and the deformation teeth 4-1 on the A side and the deformation teeth 4-2 on the B side are correspondingly arranged adjacent to each other in the spring 38. Between the two coils of spring wires, the deformation teeth 4-1 on the A side and the deformation teeth 4-2 on the B side are alternately arranged. In this embodiment, the structures, connections and working principles of other parts are the same as those in Embodiment 1.

Embodiment 3

[0052] Such as Image 6 , Figure 7 As shown, in this embodiment, the difference from Embodiment 1 is that the curved bracket is a bellows 40, and the deformation teeth 4-1 on the A side and the deformation teeth 4-2 on the B side are correspondingly arranged on the pipe wall of the bellows 40 On the two opposite side surfaces of the inner recess on 41, the A-side deformed teeth 4-1 and the B-side deformed teeth 4-2 are alternately arranged. In this embodiment, the structures, connections and working principles of other parts are the same as those in Embodiment 1.

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Abstract

The invention discloses a pressure-sensitive type fiber sensing device for perimeter security protection. The device comprises at least a fiber bending sensing element which is arranged under a pavement flat plate and is buried in a soil layer. Each fiber bending sensing element comprises a signal fiber. At least one end of an optical cable is connected with a test unit. The test unit is connected with a processing unit. The processing unit is connected with alarm equipment and a camera. The fiber bending sensing element comprises a guide rod and a housing which is in sliding fit with the guide rod. The guide rod is in contact connection with one end of a curved support. The other end of the curved support is fixed on an inner wall of the housing. When extraneous force generates displacement to the pavement flat plate, displacement of the pavement flat plate further enables bending curvature of the signal fiber to change, an optical signal transmitted in the signal fiber changes with the above change, the change of the optical signal can be monitored through the test unit and is transmitted to the processing unit, and the processing unit starts the alarm equipment and the camera. According to the device, an intrusion behavior of an intruder can be effectively monitored.

Description

technical field [0001] The invention relates to a sensing device, in particular to a pressure-sensitive optical fiber sensing device for perimeter security. Background technique [0002] With the vigorous development of social security, there are more and more various safety monitoring devices. Outdoor perimeter intrusion detection devices are used for large area perimeter monitoring and are valued because in most cases this is the first barrier against intrusion. [0003] There are many types of perimeter monitoring devices, but most of them are not popular due to the price, use, and maintenance costs. The most common perimeter monitoring systems are infrared perimeter monitoring systems and video monitoring systems. The former is widely used because of its low price and high cost performance, but its disadvantages are short service life, greater influence from various environments, and frequent false alarms; the latter is also widely used because of its on-site record and...

Claims

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Application Information

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IPC IPC(8): G08B13/10G01V8/10G01D5/353
Inventor 杜兵
Owner XIAN JINHE OPTICAL TECH
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