The current development direction of security technology is to integrate independent security subsystems such as video surveillance, perimeter alarm, intrusion detection, and access control to form a multifunctional, all-weather, and dynamic comprehensive security management system. As the first line of defense of the security system, the perimeter alarm plays a very important role. It has evolved from passive alarm detection in the past to today's deterrence and blocking plus alarm. And 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 the inevitable trend of its development.
The perimeter alarm system uses technologies such as microwave, active infrared, electronic fence, etc. to form a visible or invisible "protective wall" at the protected boundary. When a wall-crossing behavior occurs, the detector in the corresponding defense zone will send an alarm. The signal is sent to the alarm control host of the control center, which displays the alarm position while giving out sound and light warnings. It can also be linked to the perimeter analog electronic screen, and even linked to the camera monitoring system, access control system, strong electric lighting system, etc.
In recent years, the perimeter protection system has become a basic and indispensable security subsystem of the security system. It is not only visible in high-end areas such as military factories, military camps, airports, ports, and government agencies, but also widely used in residential communities. , Schools, shops, and even large rural orchard farms, etc., and maintain a very high application growth rate in these fields.
Infrared beam working principle
The infrared beam detector is composed of two parts: receiving and transmitting. The infrared transmitter emits infrared rays to a receiver installed several meters or even hundreds of meters away, and its beams can be single beam, double beam, or even multiple beams. When the corresponding infrared beam is interrupted, the receiver sends out an alarm signal. The receiver is composed of optical lens, infrared photoelectric tube, magnifying and shaping circuit, power driver and actuator. Its 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 photoelectric tube cannot receive the infrared light, so it outputs the corresponding alarm electrical signal, and After shaping and amplifying, the switch alarm signal is output. The alarm signal can be received by the alarm controller and linked to the actuator to activate other alarm devices, such as sound and light alarms, analog electronic maps, television monitoring systems, lighting systems, etc.
The infrared perimeter alarm system is a branch of the anti-theft alarm. The infrared perimeter alarm system is mainly used to prevent illegal personnel from entering the set defense zone illegally without our permission from non-entry, thereby avoiding various potential life and property dangers. . Effectively protect the surrounding area and provide timely alarms for overturning behaviors; in the past, the infrared perimeter alarm system has a relatively small range of applications, mainly in some key places, but with the update and development of technology, the infrared perimeter alarm system has also continued The application is in other industries, such as home furnishings, banks, supermarkets, etc., so the infrared perimeter alarm system is constantly expanding every year.
Infrared perimeter alarm system is generally that the front-end detection equipment of switch signal output is connected to the alarm host. The other is to rely on the bus for management, and then connect to the software installed on the computer. As for the front-end detection equipment, there are more, such as electronic fence, leak detection, vibration detection, infrared detection, laser detection, microwave detection, etc. Among them, there are tension in the electronic fence, high-voltage electronic pulse, and electrostatic induction. These are based on different physical principles to achieve the same detection purpose
System composition
The active infrared perimeter anti-overstepping alarm system usually consists of six systems: front-end detection system, on-site alarm system, transmission system, central control system, linkage system and power supply system.
Infrared perimeter alarm systems generally have the following characteristics:
1. Strong anti-interference ability. The detection equipment at the front end of the infrared perimeter alarm system can work normally in bad weather, so the detection equipment at the front end of the infrared perimeter alarm system has a strong anti-interference ability.
2. The positioning is accurate. We use the infrared perimeter alarm system to generally divide the armed area into several defense zones. Once an alarm occurs in a certain defense area, the infrared perimeter alarm system will immediately send the alarm area to the alarm host. , So as to achieve the precise positioning function.
3. Linkage alarm. The infrared perimeter alarm system has a linkage alarm function. Once an illegal person breaks into the area where we are armed, the infrared perimeter alarm system will link the surrounding monitoring, automatically turn to the alarm area, and the central monitor screen will automatically switch When the alarm zone is reached, the hard disk video recorder will automatically record the image of the zone, and the on-site warning lights will be watched.
4. Strong scalability. The infrared perimeter alarm system adopts active far-infrared multi-beam detection equipment to set up around the community and cooperate with the community closed-circuit television monitoring system, so the infrared perimeter alarm system has strong scalability.
