Talk about the electronic fence

Now, in the surrounding walls of some communities, a grid of four metal wires can be seen. There are also a number of alarms on the grid. In addition, the warning signs of “suspended high voltage, no climbing” can be seen everywhere. Many owners will express their concern: "Is this a high-voltage power? It is dangerous to put it outside my balcony." In fact, this power grid is not a grid in a broad sense, but a new type of anti-theft device, also known as electric fence.

When the above situation occurs, the staff explained: "The whole set of equipment consists of four lines of fences, in addition to remote monitoring, alarm and other supporting. The current on the fence is pulsed, high voltage and low current, will not be on the human body. When someone touches the two lines of the electronic fence, it is at most a numbness. Immediately after that, it will alarm. Our security personnel will also arrive at the scene in the first time. In fact, the electronic fence is installed for theft prevention. This kind of electronic fence is installed in many communities. From the current point of view, the anti-theft effect is very good, and there is no incident that hurts the owner or the thief.

People worry that the electronic fence has the danger of electric shock. In fact, the electrical pulse of the electronic pulse fence system is safe for personal safety. Although the electronic pulse fence system has a pulse voltage of 6000-10000V, the repetition frequency of the pulse is extremely low, only once per second. The duration of the pulse is ≤ 0.1 second. The maximum energy of the pulse is 5 joules, and the maximum power of the pulse is 2.5 millicolons. It can be seen that its energy is very small, it will not hurt people, it only gives the intruder a more uncomfortable warning, shakes its ability and motivation to climb the fence, and achieves the purpose of security blocking.

The electronic fence integrates deterrence, blocking and intelligent alarm. Generally installed outdoors, along the original fence (such as brick walls, cement walls and iron fences), the probe is connected at the proximal end and the receiver is connected at the far end. If an intruder attempts to invade, he will first see the electronic fence hanging on the fence, and it is forbidden to climb the warning sign, which gives people psychological deterrence. If an attempt is made to cross and touch the metal wire of the fence, an electric shock will be given to make it retreat and not dare to touch it again. If forced to climb, the system immediately alarms. On the other hand, the electronic fence uses a flexible hanging rod. When the criminal attempts to cross, the flexible fence does not give support, so that the criminal can not cross. This is the effective deterrent function of the electronic fence.

Classification of electronic fences

First, electronic pulse electronic safety fence

Pulsed electronic fences are common electronic safety fences in our lives. In fact, in simple terms, the role of the pulse fence can be simplified into two parts: theft prevention and alarm. Since the structure of the fence is composed of an electronic cable with a charged pulse, when an impact is made on the electronic safety fence, the electronic cable can generate a non-fatal pulse high voltage to effectively defeat the intruder and act as an antitheft. At the same time, the system will also send the intrusion signal to the system management terminal to remind the security personnel to pay attention, thus achieving the role of the alarm. So it is a combination of burglar alarms.

Because the anti-theft feature of the pulse fence is very good, and the ability to work independently is also very strong, it can often be seen in the government and civilian security fields. In addition, because it is also more resistant to corrosion, it is also more used in relatively harsh environments.

(1) Function description:

The electronic pulse fence is an active intrusion prevention system that counterattacks intrusion attempts, defeats intruders, delays intrusion time, and does not threaten human life. The pulsed electronic fence consists of an electronic cable with a charged pulse. The non-fatal pulse high voltage generated by the electronic cable can effectively defeat the intruder and send the intrusion signal to the security department monitoring equipment to ensure that the management can timely understand the situation of the alarm area and quickly process it.

(2) Applicable places:

Applicable to any location (such as: military bases, government agencies, judicial systems, key cultural relics, borders, private homes, real estate developers, industrial heavy sites, factories, warehouses, etc.). On existing perimeter fences, fences, or self-supporting installations. The system automatically adapts to changes in environmental conditions and site conditions. It varies according to regional conditions. For example, in foggy days and windy days, the system can maintain alarm values. Easy to apply, no welding required, no threat of erosion.
 

Second, the tension type electronic safety fence

The tension electronic safety fence is functionally not pulsed, but it is also one of the common electronic safety fences we use. Tension-type electronic safety fences are generally composed of ordinary metal wires and tension detectors. When the fence is affected by external forces, it will be converted into an electronic signal according to the force, thus completing the alarm work.

Compared with pulsed electronic safety fences, the anti-theft effect of such fences may be slightly inferior, but the level of alarm is more detailed than the pulse fence. This type of fence is also more used on protective fences made of metal.

(1) Function description:

The tension type electronic wire ties are composed of ordinary metal wire and tension detector. This system connects a variety of types of regular threads through a tension detector. Each tension detector converts any human or mechanical force (forced force) that attempts to climb, cut the line, into an electronic signal and transmits it to control. Center to achieve the purpose of the alarm.

(2) Applicable places:

It is suitable for outdoor fences made of wire structure (such as ordinary wire, double braided wire, barbed metal wire, etc.). The weather has little effect on the system. More suitable for military facilities, airports, industrial sites, petrochemicals, etc.

Third, vibrating electronic safety fence

Vibrating electronic safety fences are also one of the more common fences in electronic security fences. It consists of a vibration sensing cable and a vibration sensor. Similar to the tension fence mentioned above, its function is mainly reflected in the alarm. In everyday applications, vibrating electronic safety fences are often used with existing fences and other facilities. When someone climbs these devices, the vibration sensor receives an external vibration sensor to achieve an alarm. Because its sensing device is sensitive to the induction of different forces, even the relatively small cutting behavior can not escape the supervision of the sensor. Compared with the tension type fence, since the vibrating fence is judged by vibration, its recognition ability is also more sensitive, and thus it is more used based on the environment such as the fence.

(1) Function description:

The vibrating electronic induction cable is composed of a vibration sensing cable and a vibration sensor. The vibrating sensor can be mounted on existing perimeter bars and walls. For the fence, any real attempt to climb or break the wall will be detected and the alarm will be activated. For the peripheral bar, the vibration sensor and sensor cable are attached to the existing fence. The vibration of the peripheral bar is received by the vibration sensor. For the attempt to climb the cut, pick up the behavior. It will cause an alarm from the alarm.

(2) Applicable places:

Suitable for outdoor fences and peripheral fences (eg chain mesh, welded mesh, barbed barrier mesh, etc.). This system has little effect on weather changes.

Fourth, buried induction equipment

The buried induction device consists of a buried cable and an intrusion detector. It is different from the fence device of the comparison type mentioned above. It does the alarm work by burying the probe sensor underground and constructing an invisible magnetic field during operation. When someone enters the warning area, it is equivalent to destroying the magnetic field, and the sensor will send an alarm to the control center to remind the security personnel to pay attention to the corresponding area. '

For such alarm devices, concealment is undoubtedly its characteristics. In some relatively empty but sensitive areas, such devices are undoubtedly a good choice. Especially in the operation of the equipment, the characteristics of the work that is nothing but ubiquitous are at least shocking enough.

(1) Function description:

A buried fiber optic cable consisting of a buried induction cable and an intrusion detection sensor. An invisible electromagnetic field is generated around the buried induction cable by a concealed (buried underground) intrusion detection sensor. When someone interferes with the electromagnetic field, an alarm is triggered to remind the management to view and process the defense zone.

(2) Applicable places:

Suitable for outdoor and indoor areas without magnetic interference. The electronic fence induction cable can be buried in any medium, such as soil, sand, clay, concrete, etc., thereby forming a unified, concealed volume detection field built according to the terrain. The change of weather has little effect on it, such as: rain, snow, sandstorm, etc. (but it will have a certain impact on thunderstorms with magnetic field induction), and the safety is higher.