Brief Introduction of Security Products (5)

(4) Perimeter-controlled intrusion detector ?? Perimeter, generally refers to arming around the building, or arming around a certain range, as the first line of defense of the security alarm system, which is the door of the offender. Important sites such as the museum of cultural relics, weapons and ammunition depots, confidential departments, and the residence of the chief executive are all installed and used.

Dual-beam or multi-beam active infrared intrusion detector

The use of such detectors around the building constitutes four lines of defense, which can be found in time no matter which direction you approach the building. In outdoor applications, in addition to keeping the lens clean, it is also necessary to consider the objective factors of adverse infrared penetration such as waterproof, rain, fog, and sand. According to national standards, the effective detection distance should be 1/6 of the maximum nominal distance, that is, to ensure the detection of a distance of 100 meters, a 600-meter detector is required.

Microwave wall intrusion detector

We have introduced the microwave wall in the sending and receiving split microwave intrusion detector. In the perimeter application, it should be noted that there should be no gap between the two detectors. Prevent intruders from passing through the gap.

Pulsed high-voltage power grid

Pull up a pulsed power grid on the fence, and the pulsed high-voltage generator sends thousands of volts of high voltage. When someone touches the network, you can shock the offender. Due to the high voltage discharge, the grid voltage drops rapidly, and the alarm will alarm. The main purpose of using pulse instead of continuous high voltage is not to cause permanent harm to human body.

The power grid is a product controlled by the public security department, and it will not be approved unless it is specifically needed. Never install it privately, otherwise it will be legally responsible for the consequences.

Microwave leakage cable intrusion detector

Two special cables that can partially leak microwaves are buried in parallel and buried 20 cm underground, one to transmit microwaves and one to receive microwaves. When no one walks by, the microwave energy received is constant, and the alarm will not alarm. When someone passes by, the human body will absorb the microwave energy and make the microwave energy at the receiving end abrupt, thus generating an alarm. It is characterized by concealed arming, is not easy to be discovered, and has high relative reliability. But the input cost is high, and the current application is not too wide.

Vibration ground sound intrusion detector

The ground sound intrusion detector is extremely sensitive to the vibration signals generated by people walking on the ground. The vibration signal generated by people walking or overturning the wall can be detected within 10-15 meters when buried 10-20 cm underground or buried in the surrounding wall. Multiple relay arming can form a perimeter defense line. Its characteristic is that it is not affected by topography and topography, the defense line can be detoured and tortuous, and bridges, water surfaces, and culverts can be fortified, which is very convenient to use.

In addition to perimeter applications, vibration detectors can also be used for building wall protection in cement walls and brick-concrete walls. If the integrity of the building is good, each detector can control the wall surface of 60m2. It is especially suitable for the prevention of vaults, warehouses, and ancient buildings. Destructive actions such as digging walls, drilling holes, and blasting can be discovered in time.

Vibration cable

Set up a wire fence around the building and fix the vibration cable on it. Once someone climbs over it will cause vibration. The cable converts the vibration energy into an electrical signal to cause an alarm. This kind of cable is easy to install, has strong environmental applicability, works reliably, and has a wide range of applications.