Infrared detector installation method

Infrared detector (Infrared Detector) is a device that converts incident infrared radiation signals into electrical signals for output. Infrared radiation is an electromagnetic wave with a wavelength between visible light and microwave, which is invisible to the human eye. To detect the existence of this radiation and measure its strength, it must be transformed into other physical quantities that can be detected and measured. Generally speaking, any effect caused by infrared radiation irradiating an object can be used to measure the intensity of infrared radiation as long as the effect can be measured and is sufficiently sensitive. Modern infrared detectors mainly use infrared thermal effect and photoelectric effect. The output of these effects is mostly electricity, or it can be converted into electricity by an appropriate method.

installation method

(1) There are two types of pillars that are more popular, such as round and square. The early popular ones are round cross-section pillars. The situation is reversed. Square pillars are becoming more and more popular in the engineering world. The main reason is that the detector is installed on the square pillar without rotation and is not easy to move. In addition, there are a wide range of stainless steel, alloy, aluminum alloy profiles to choose from is also one of its advantages. Another method in the type of work is to use angle steel as a pillar. If the wire cannot be effectively threaded through the pipe and the wire is exposed in the air, this method is not acceptable. The key point is that the fixing of the pillar must be firm and firm, without shifting or shaking, to facilitate installation and fortification, and reduce false alarms.

(2) Infrared detectors that can provide a horizontal azimuth rotation angle of 180° and an elevation angle of more than 20°, such as ALEPH active infrared detectors HA, ABT, ABF series products, can support the probe directly on the outer wall of the building or the surrounding wall, fence installation.

(3) General Principles of Detector Installation The detector installed on the channel, its main function is to prevent illegal passage of people. In order to prevent false alarms caused by pets and small animals, the position of the probe should generally be more than 50 meters above the ground. The shading time should be adjusted to a faster position to respond quickly to illegal intrusions. The main function of the detector installed on the surrounding wall is to prevent man-made malicious overturning. It can be installed on the top or side. For the detector installed on the top, the position of the probe should be higher than the fence and the top of the fence 25 to reduce false alarms caused by birds and kittens moving on the wall. The anti-false alarm ability of the four-beam detector is stronger than that of the double beam, and the double beam is stronger than the single beam. The side installation is to install the probe on the fence, and the side wall near the top of the fence, usually for wall installation, mostly installed on the outside. This way can avoid the interference of the activities of birds and kittens. Each method has its own advantages or disadvantages, and the engineering company has its own preference for each installation method. Users should choose according to the characteristics of their buildings and anti-theft requirements.

(4) Special reminder: The line must not be exposed, and must be installed in the dark. This is the minimum requirement for the safety of the detector.

For the detector installed on the surrounding wall, the farthest horizontal distance of the rays from the wall can not be more than 30. This point needs special attention when the wall turns in an arc. After the wiring is connected, please use the resistance file of the multimeter to test the power terminal â‘  and â‘¡ of the probe. Make sure there is no short-circuit fault before turning on the power for debugging.