Known security technology development direction of video surveillance, perimeter alarm, intrusion detection, access control the independent security subsystem integration integration, the formation of a multi-purpose, all-weather, dynamic integrated security management system. Perimeter alarm as the first line of defense of the security system, the role is very important from the past passive alarm detection, development of today deterrence barrier plus alarm. And with the development of security technology and the maturity of the security market, as well as to further improve policies and regulations, digitization, integration, networking will be the inevitable trend of its development.

       Perimeter alarm system is in protective boundary used, such as a microwave, active infrared, electronic fencing techniques to form a visible or invisible fence, have jumped over the wall behavior occurs, the corresponding zone of the detector will alarm alarm control host signal and sent to the control center, audible and visual warning at the same time display alarm position, can also be linked perimeter analog electronic screen, and even camera surveillance systems, access control systems, strong electric lighting system linkage.

       Perimeter protection system in recent years has become a security system is essential and indispensable security subsystem, not only in the field of military factories, barracks, airports, ports, government agencies, and other high-end visible the "disappeared", has also been widely applied to residential district, and in these areas remains very high speed application growth.

       This article will take the initiative to infrared on the radio, tension electronic fence, leaks cables, four of the most commonly used cable vibration perimeter to prevent technology analysis, to take a glimpse of the perimeter security alarm system technology development trail.

Tension electronic Wai working principle

       The electromechanical device tension electronic fence is a to prevent human entities insurmountable obstacles and perception climbing tension and compression, shearing intrusion assembly, a new perimeter anti-intrusion alarm facilities. It is a "tangible" alarm system, the sense of deterrence, to make it to the intruder "visible" psychological pressure, the alarm and warning organically combined reach to prevent the main purpose of anti-lock combination. After the system is installed, it is equivalent to the top of the formation of a "tangible" electronic barrier in the wall, increasing the height of the fence, so that can not easily climb over the walls inside and outside intrusion or flee.

       Tension electronic fence due to new detection methods, and signal processing methods, the impact of environmental factors on the tension alarm threshold changes to a minimum, compared with the infrared class perimeter detectors significantly improve its environmental adaptability .

System components

       Tension electronic fence is composed of three parts of electromechanical components, electronic components and mechanical parts. Electromechanical components by the tension detector. The tension detector is based on the tension characteristics of the electronic fence, rely for climbing, tension and compression, cut produce tension wire, attempts to invade behavior in response to generate an alarm signal device. Zone controller with the tension detector supporting the use, it is the acquisition and processing of the present anti-region of one and a plurality of tension detector output signal, to determine whether to generate an alarm, i.e., whether to provide the system the perimeter zone status signals, such as alarm or not and other activities.

       The electronic component includes a bus communication module, the DC power supply (power controller). The bus communication module that is mentioned in the previous section active infrared perimeter alarm system, the remote transmission of the alarm signal of the detector to the alarm control host. Bus communication module supporting the provision by the tension of the cable manufacturers, but also by a third-party alarm system vendor.

       DC power supply will have to be with the the tension detectors and zone controller supporting choice, generally supporting the provision by the tension of the cable manufacturer.

       The mechanical member comprises a rope and installed, fixed, the means of support and tightening of the rope, such as a control rod, by the force rod, the rod, gimbal, the gimbal bearing holder, the spring, the fastening nut or the like.