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Principle and composition of infrared radiation system for infrared perimeter alarm system

51 Published by xia, Crystal May 30,2019

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The current development direction of security technology is to integrate and integrate independent security subsystems such as video surveillance, perimeter alarm, intrusion detection and access control to form a multi-functional, all-weather and dynamic integrated security management system. As the first line of defense of the security system, the perimeter alarm is very important. It has evolved from the past passive alarm detection to today’s deterrence block and alarm. With the development of security technology and the maturity of the security market, as well as the further improvement of policies and regulations, digitalization, integration and networking will be an inevitable trend of its development.

The perimeter alarm system uses a technology such as microwave, active infrared, electronic fence to form a “protective wall” that is visible or invisible at the boundary of the protection. When a wall-breaking behavior occurs, the detector of the corresponding zone will issue an alarm. The signal is sent to the alarm control host of the control center to display the alarm position while emitting sound and light warnings. It can also link the perimeter analog electronic screen, or even the linkage camera monitoring system, access control system, and strong electric lighting system.

Reflective infrared photoelectric sensor aplication.

In recent years, the perimeter defense system has become a basic and indispensable security subsystem for security systems. It is not only visible in high-end fields such as military factories, military camps, airports, ports, government agencies, but also widely used in residential communities. , schools, shops, and even the majority of rural orchard farms, and in these areas maintain a fairly high rate of application growth.

How infrared radiation works

The infrared radiation detector consists of two parts: receiving and transmitting. The infrared emitter emits infrared light to a receiver mounted at a few meters or even hundreds of meters away, and its beam has a single beam, a double beam, or even multiple beams. When the corresponding infrared beam is interrupted, the receiver sends an alarm signal. The receiver is composed of an optical lens, an infrared phototube, an amplification shaping circuit, a power driver and an actuator. The working principle is that the receiver can receive the infrared beam as a normal state, and when an intrusion occurs, the infrared beam emitted by the transmitter is blocked, that is, the phototube receives no infrared light, thereby outputting a corresponding alarm electric signal, and After shaping and amplifying, the switch quantity alarm signal is output, and the alarm signal can be received by the alarm controller, and the linkage actuator is activated to start other alarm devices, such as an audible and visual alarm, an analog electronic map, a television monitoring system, a lighting system, and the like.

Infrared perimeter alarm system is a branch of burglar alarm. The infrared perimeter alarm system is mainly to prevent illegal personnel from illegally entering the designated zone without our permission, thus avoiding various potential life and property risks. . Effective protection of the surrounding area, providing timely warning of the over-the-counter behavior; the previous application of the infrared perimeter warning system is relatively small, mainly applied in some key places, but with the update and development of technology, the infrared perimeter alarm system is also constantly Applications in other industries, such as home, banking, supermarkets, etc., so the infrared perimeter alarm system is constantly expanding every year.

The infrared perimeter alarm system is generally the front-end detection device of the switch signal output connected to the alarm host, and the other is to rely on the bus for management, and then connect the software installed on the microcomputer. As for the front-end detection equipment, there are more, such as electronic fences, leak detection, vibration detection, infrared detection, laser detection, microwave detection, etc. Among them, there are tensions in the electronic fence, there are high-voltage electronic pulses, there is static induction These and so on are based on different physical principles to achieve the same purpose of detection.

System composition

The active infrared perimeter anti-overall alarm system usually consists of six systems: front-end detection system, on-site alarm system, transmission system, central control system, linkage system and power system.

The infrared perimeter alarm system generally has the following characteristics:

1. Strong anti-interference ability, the detection equipment at the front end of the infrared perimeter alarm system can work normally under bad weather, so the detection equipment at the front end of the infrared perimeter alarm system has strong anti-interference ability.

2. Accurate positioning, we use the infrared perimeter alarm system will generally divide the arming area into several large areas, once there is a certain area of ​​the alarm, the infrared perimeter alarm system will immediately send the alarm zone to the alarm host To achieve precise positioning.

3. Linkage alarm, infrared perimeter alarm system has linkage alarm function. Once an illegal person breaks into the area we are armed, the infrared perimeter alarm system will linkage to the surrounding monitoring, automatically turn to the alarm area, and the central monitor screen will automatically switch. To the alarm zone, the DVR automatically records the zone image and the site lights are alerted.

4. Strong scalability, infrared perimeter alarm system uses active far-infrared multi-beam detection equipment set around the community, and with the community closed-circuit television monitoring system, so the infrared perimeter alarm system is highly scalable.

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