Defense area type optical fiber disturbance periphery security and protection system and quick invasion disturbance judgment method

A security system and zone-type technology, applied in anti-theft alarms, instruments, alarms, etc., can solve the problems of high false alarm rate, small monitoring range of perimeter security systems, and high power consumption

Active Publication Date: 2014-08-27
TIANJIN QIU SHI FIBER TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of the existing perimeter security system such as small monitoring range, large power consumption, susceptibility to external ele

Method used

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  • Defense area type optical fiber disturbance periphery security and protection system and quick invasion disturbance judgment method
  • Defense area type optical fiber disturbance periphery security and protection system and quick invasion disturbance judgment method
  • Defense area type optical fiber disturbance periphery security and protection system and quick invasion disturbance judgment method

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Experimental program
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Effect test

Embodiment 1

[0050] Embodiment 1: Defense Zone Type Optical Fiber Disturbance Perimeter Security System Based on Michelson Optical Fiber Interference Principle

[0051] Such as figure 2 As shown, the system includes multiple defense zones, and each defense zone has an independent sensing optical path, a central control identification module, a communication and an alarm module, and a computer connected to each defense zone, wherein:

[0052] Sensing optical path part based on optical fiber interference principle: Michelson or M-Z optical fiber interference principle is used to generate interference signals and monitor external signals in real time; the specific structure of the optical path is: the optical signal emitted by laser 1 is input to 2╳2 coupler 3 through isolator 2 One input port, the two output ports of the 2╳2 coupler are respectively connected to the first sensing fiber F1-6a and the second sensing fiber F2-6b, the first sensing fiber F1 and the second sensing fiber F2 Th...

Embodiment 2

[0058] Embodiment 2, a method for quickly and efficiently judging whether there is an intrusion disturbance

[0059] Such as figure 2 As shown, the light emitted by the light source passes through the 2╳2 couplers in each defense zone and is divided into two identical lights. When there is disturbance outside, the two beams of light will have different phase shifts. After the detector is converted into an electrical signal, it is sent to the central control identification module for data processing. The data processing parameters in the central control identification module are adjusted through the communication and alarm modules. Once it is judged that there is an intrusion signal, an alarm message is sent immediately.

[0060] The following pairs figure 2 The system shown, combined with Figure 5 The flow of the judgment method, using an example to illustrate the judgment process:

[0061] 1. The order of the all-phase filter is set to 64, and the number of channels i...

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Abstract

Provided are a defense area type optical fiber disturbance periphery security and protection system and a quick invasion disturbance judgment method thereof. The defense area type optical fiber disturbance periphery security and protection system comprises multiple defense areas, wherein each defense area is provided with an independent sensing optical path portion, a central control recognition module, a communication and warning module and computers jointly connected with the defense areas. The judgment method comprises the steps of producing an interference signal through an optical fiber interference optical path and utilizing the signal frequency energy distribution to quickly and efficiently judge whether an invasion signal exists in the outside or not. In the monitoring process of the system, signal data of a whole optical cable can be obtained and subjected to analysis and processing in real time, denoising and energy calculation of the signal in an interested frequency band are achieved through an all-phase filter group, and the disturbance frame judgment purpose is achieved. The shortcomings of an existing periphery security and protection system can be effectively overcome, long-distance large-range monitoring can be achieved, the power consumption is low, the anti-interference performance is good, and warning failure and mistaken warning are not caused.

Description

technical field [0001] The invention belongs to the field of optical fiber sensing and signal processing, in particular to a method for quickly and efficiently judging whether there is disturbance in a zone-type optical fiber disturbance perimeter security system. Background technique [0002] With the continuous innovation and development of the global economy and science and technology, people's awareness of safety precautions is getting stronger and stronger. Some important areas, such as military centers, important state agencies, banks, industrial parks, schools, etc., have higher security requirements. At present, there are many different types of perimeter security products at home and abroad, such as video surveillance perimeter security systems, active infrared perimeter security systems, leaking cable perimeter security systems and electronic pulse perimeter security systems. The video surveillance perimeter security system is to install the camera probe at the ke...

Claims

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Application Information

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IPC IPC(8): G08B13/186
Inventor 刘铁根孟卓
Owner TIANJIN QIU SHI FIBER TECH
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