Taking Shanghai as the main point, electronic fences are widely used in the Yangtze River Delta and major coastal cities in China. According to analysis, the electronic fencing market in Shanghai, Jiangsu, and Zhejiang currently accounts for approximately 60%-70% of the national e-fence market, with the civilian market accounting for approximately 40%-50%. A survey report shows that in recent years, the annual growth rate of China's electronic fence market has exceeded 20%, and it will maintain a rapid development trend in the next few years. The annual growth rate is expected to remain at 20% or more. The electronic fence market can be said to be in the ascendant and has broad prospects.
In the application of electronic fences, the airport is an important area. In the United States, in 2013, IHS estimated that the electronic perimeter security at the US airport is worth about US$25 million in hardware and software alone, and about 9% of the perimeter security market. Airport perimeter security systems also require perimeter security and fence sensors, radar and video analytics, and all sensors and other technologies will not be affected by aircraft noise and vibration.
In China, the current airport's perimeter preventive facilities are mostly based on common metal nets. According to statistics, between 2004 and 2007, several incidents of “stoaming†occurred in China and the “smuggling†people were unaware. In the case of entering the apron and climbing into the pod of the landing gear on the right side of the aircraft, one of them succeeded in 'stucking people' from Kunming to Chongqing, and the other fell to death when the plane took off. The occurrence of these several incidents also triggered people's great concern about airport perimeter prevention. Although some airports are equipped with video surveillance systems, such perimeter defenses can only provide extremely limited barriers and delays to intruders. They can neither effectively prevent intrusions nor promptly alert security personnel to the police.
In the face of ever-increasing airport perimeter security requirements, electronic fence systems are the trend. The electronic fence is actually a product of the combination of traditional perimeter protection and modern electronic technology. It adopts the perimeter security concept of 'mainly blocking and assisting alarm' and sets 'deterrence, blocking, alarm, and security' in one, and its blocking effect is first. Embodied in the deterrence function, a warning sign is hung on the metal wire, so that an attempted illegal intruder will have psychological pressure upon seeing it, and there will be a feeling of electric shock when touching the fence, which is enough for the intruder to deter; and secondly, the electronic fence itself is A tangible barrier, with proper height and angle, is difficult to climb. If forced to break through, the host will send an alarm signal.
Difficulty in airport perimeter security
The perimeter of the airport is very large, ranging from nearly ten kilometers to several tens of kilometers. The next airside is often a flat river with a wide field of vision, but it is because of this that the airside perimeter of many airports is desolate; the airport physical perimeter is quite More visible barbed wire, many airports also use the barbed wire design on the road side. In fact, these three characteristics also brought three difficulties.
First, the excessively long distance caused the difficulty of manned patrols or the timely delivery of police after an alarm;
Secondly, the terrain of Yimapingchuan makes it impossible for the intruder to restrict his actions once he breaks through the line of defense.
Third, there are deficiencies in the appearance of wire mesh, and prolonged exposure to the sun and rain can cause rust on the surface of the wire mesh, corrosion, and brittleness. How to Build an Effective Airport Perimeter Security System
In order to effectively construct a perimeter defense system that can truly exert its role of blocking and alarming, the airport must combine human defense, physical defense, and technical defense. To this end, improvement should be started in the following two aspects:
1. Set a fence or fence at the perimeter of the flight area. Fences or fences are both a tangible obstacle and the installation of a sensor detector.
Second, establish a perimeter electronic fence alarm system with blocking and alarm functions. The selection of electronic fences must be careful and must take into account the characteristics of the airport and select the type of electronic fence that is most suitable for airport perimeter protection. How to choose, specifically, the following points should be comprehensively considered:
(1) In order to ensure the smoothness and security of ground-to-air and terrestrial radio communication, the airport has very strict control over radio electromagnetic waves in its area. Therefore, the selected electronic fence should not be able to produce radio electromagnetic waves that interfere with and affect ground and ground communications when working. That is, electronic fences should not be capable of carrying strong electricity.
(2) The flight area of ​​a large airport is usually very large. If there are multiple separate terminals, the scope of the flight area will be even greater, and the perimeter of control will be more than tens of kilometers. Therefore, the selected electronic fence alarm system should have a sufficient capacity and the alarm distance should be long enough.
(3) Similarly, because the perimeter of the airport is too long, the alarm response speed of the selected electronic fence system should not be affected by distance, ensuring the shortest possible response time; moreover, the accuracy of the alarm should be as high as possible. With these two points, we can get enough time for the police.
(4) The selected electronic fence system should have the function of real-time electronic map reflection, which is more conducive to the timely processing of the police.
Network electronic fence unique advantages
The network electronic fence is a new generation of electronic fence system that combines traditional electronic fence technology and network technology. It is mainly composed of an electronic fence host, intelligent control keyboard and management software. Users can supervise the electronic fence through the network and realize users. The real-time information transmission, data interaction, and remote supervision functions make the network electronic fence unique.
Deterrence block: The front of the pulsed electronic fence has 5,000 to 8,000 volts of pulsed high voltage, which provides electric shock to intruders and creates a powerful deterrent that effectively blocks intruders.
Dynamic linkage: When the electronic fence alarms, the system can achieve quick linkage between the video screen and lighting equipment in the alarm area, and can warn the intruder in the alarm area through the voice broadcast system.
Intelligent control: The network electronic fence system can realize the timing adjustment of arming, disarming, switching between high and low voltages, and working modes of the pulsed electronic fence, and can check the real-time working status of each zone of the electronic fence.
Unified Management: Using SAM100 security management software to integrate security subsystems to form a three-dimensional, unified security management platform, centralized control and unified management of each subsystem can be implemented locally and remotely, making the security system the most effective.
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