Basic definition and development overview of anti-theft alarm

The equipment of the anti-theft alarm system is generally divided into: front-end detector, alarm controller. The alarm controller is a host (like the host of a computer), which is used to control the processing of wired/wireless signals, detection of system failures, power supply, signal input, signal output, built-in dialer, etc. The alarm controller is indispensable in an anti-theft alarm system. Front-end detectors include: door magnetic switch, glass break detector, infrared detector and infrared/microwave dual discriminator, emergency button.

　　 Although the anti-theft alarm system product is not the system with the largest investment share in the security system, it is the most widely distributed and most important basic subsystem. In the linkage with the video security monitoring and entrance (access control) control system, the alarm system has acted as an outpost. Therefore, among the three mainstream system integration modes, the integration with the alarm host as the core is also a system construction method that has received much attention. With the promotion of the construction of safe cities across the country, the huge application demand with urban network alarm and monitoring as the main system construction goal will surely promote the rapid development and further improvement of perimeter intrusion alarm system products, and form a rapidly growing market prospect .

　　 One, system function

　　 Anti-theft alarm system refers to a device that causes an alarm when an illegal intrusion into the prevention zone is used. It is used to signal the occurrence of a dangerous situation. The alarm system uses detectors to arm important locations and areas inside and outside the building. It can detect illegal intrusion in time, and promptly warn relevant personnel when it detects an illegal intrusion. For example, door magnetic switches, glass break alarms, etc. can effectively detect intrusion from outside, and infrared detectors can sense the activities of people in the building. Once an intrusion occurs, the time and location of the intrusion can be recorded in time, and an alarm signal can be sent out through the alarm device.

　　 2. Development history of anti-theft alarm system

The anti-theft alarm system is responsible for providing inspection and alarm services for various points, lines, areas and areas inside and outside the building. It usually consists of alarm detectors, alarm system control hosts (referred to as alarm hosts), alarm output execution equipment, and transmission cables. The anti-theft alarm system is responsible for providing inspection and alarm services for the inside and outside of the building. When there is an illegal intrusion within the monitoring range, it will cause a sound and light alarm. Among them, detectors, channels, and alarm controllers are the indispensable main components.

　　 The first-generation anti-theft alarm is an on-off alarm, which prevents theft from breaking in. This alarm is installed on doors and windows.

　　 The second-generation anti-theft alarm is a glass break alarm and a vibrating alarm installed indoors.

　　 The third-generation anti-theft alarm is a space movement alarm (such as ultrasonic, microwave, passive infrared alarm, etc.). The characteristic of this type of alarm is that as long as the space being guarded is moved, it will cause an alarm. These intrusion alarm systems have developed rapidly in terms of alarm detectors.

　　 Third, the composition of the anti-theft alarm system

　　The anti-theft alarm system usually consists of front-end equipment (including detectors and emergency alarm devices), transmission equipment, processing/control/management equipment, and display/recording equipment.

The front-end detection part is composed of various detectors. It is the tactile part of the intrusion alarm system. It is equivalent to human eyes, nose, ears, skin, etc., and senses changes in various physical quantities such as temperature, humidity, odor, energy, etc. It is converted into an electrical signal suitable for transmission according to a certain rule.

　　The operation control part is mainly an alarm controller.

　　 The monitoring center is responsible for receiving and processing alarm information and status information from each subsystem, and sends the processed alarm information and monitoring instructions to the alarm receiving center and related subsystems.