Anti-theft alarm perimeter protection system technology development analysis

Perimeter protection system uses microwave, infrared, electronic fence and other technologies to form a visible or invisible “protective wall” at the boundary of the protection area. When a person passes or wants to pass, the corresponding detector will The alarm signal is sent to the alarm control host in the security duty room or the control center. At the same time, an audible and visual alarm is issued to display the alarm position. Some alarm systems will also link the perimeter analog electronic screen, even the linkage camera monitoring system, access control system, and strong electricity. Lighting system. In recent years, perimeter prevention has become a basic and important safety precaution in terms of prevention areas and preventive measures.

Perimeter protection system can be applied to the perimeter of the perimeter boundary of the building to prevent or to prevent the interior area of ​​the building. However, there are differences in the role of different detectors, active infrared, microwave detectors alarm in the invasion, that is, when the intrusion occurred when the alarm occurred. The electronic fence detectors, similar to physical protection, except for intrusion alarms, mainly play a deterrent role. However, no matter what kind of detectors, they can issue warnings at the first time, and can promptly notify the security personnel to rush to the place where the crime occurred, so that the intruder can stop the crime before it actually implements the wrongful act and minimize the loss. Active infrared and microwave detector perimeter protection system has the advantages of beautiful appearance, concealed installation, wide alert range, low input cost, etc. The disadvantages are slightly higher false alarm rate, less deterrence, and alarm afterwards. The perimeter guard system of the electronic fence detector has a low false alarm rate and deterrence and deterrence. That is to say, the criminals of the alarm have not yet come into the wall to report an alarm. The disadvantage is that the input cost is high.

Active infrared, microwave detectors and electronic fence detectors have in common that front-end detection devices can be easily integrated with the alarm control system on the hardware. The installation is relatively simple, and the preventive effect is obvious. Less favored by users.

Perimeter protection system uses microwave, infrared, electronic fence and other technologies to form a visible or invisible “protective wall” at the boundary of the protection area. When a person passes or wants to pass, the corresponding detector will Alarm control signals sent to the security duty room or control center after being sent to the alarm office or control center have been used for many years, and have been widely used. For example, they can be seen in high-end fields such as military factories, military forces, airports, ports, and government agencies. In these areas, a relatively high application growth rate has been maintained, such as infrared radiation, vibration cables, buried induction cables, and pulsed electronic fences.

With the enhancement of people's security awareness, in addition to the above-mentioned high-end installation perimeter alarm system, the perimeter protection system has also been applied to residential communities. Some domestic regions have formulated corresponding security standards to regulate the setting of the perimeter alarm system. For example, the local standard “Disease Prevention Technology Requirements for Residential Quarters” (DB31/294-2003) established by Shanghai Municipality in Fences or fences must be installed with a perimeter guard system. It should be noted that the active infrared intrusion detectors should be installed on the front end and cross-mounted. The detection distance of the detector should be less than or equal to 70m.

In addition, after many years of practice in Shanghai, Shanghai set standards in August 2007. Wherever it is necessary to install perimeter alarm systems, electronic impulse fences are required in principle. In August 2008, this standard was revised to require the installation of high-voltage electronics. Impulse cables, and the installation requirements of the fence, including the installation height, angle, spacing, number of cables, etc., have all been specified in detail. As a result, Shanghai has established an overall strategy for the front-end detector selection of the perimeter alarm system, which is based on electronic fence detectors and active infrared detectors, to form a comprehensive perimeter protection network. From the above situation, we can see that the perimeter prevention system has moved closer to the civilian market.

Faced with the booming perimeter security market, many companies at home and abroad have gradually developed products with high cost performance. For example, several vibration sensors, microphone linear sensors, and magnetic buried sensor cables that can be installed on the fences of fences, walls, and blade ring nets are introduced by RBTEC of Israel. These sensors have high sensitivity. When there is invasion, It will generate vibrations/induce magnetic field changes and give an accurate warning. The system is quick and easy to install, with extremely high detection rates and extremely low false alarm rates. Another characteristic is that the company’s supporting meteorological detection system installed meteorological detectors at the front of the perimeter to collect meteorological information and analyze the meteorological conditions in the surrounding area through specialized analysis software. The results are sent to the perimeter defense system, which uses microwaves, infrared, electronic fences and other technologies to form a visible or invisible “protective wall” at the border of the protected area. When someone passes or wants to pass, the corresponding The detector will send an alarm signal to the alarm control host of the security duty room or control center. The perimeter alarm system (software) will ultimately determine whether it is true based on the alarm signal detected by itself and combined with the analysis data of the reference weather system. The verdict of the police. This software algorithm, which can be used to determine whether or not to alarm according to the weather conditions in the perimeter region, reduces the false alarm rate of the alarm system.

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