Anti-theft alarm system installation attention
1, determine the installation method and height
The installation height of the detector is not arbitrary, it will directly affect the sensitivity of the detector and the effect of preventing small animals. Generally, the installation height of the wall-mounted infrared detector is 2.0-2.7 meters, away from the air temperature changes of air conditioners, refrigerators, stoves, etc. Sensitive place.
2. Reasonable location
It is best not to install two wireless infrared detectors in the same space to avoid the phenomenon of interference caused by simultaneous triggering; the infrared detector should be at an angle to the walking line in the room, and the detector is least sensitive to radial movement response. And the most sensitive to tangential (ie, the direction perpendicular to the radius). Choosing the right installation location on site is an extremely important part of avoiding false alarms from infrared detectors and obtaining the best detection sensitivity.
3. It is not appropriate to face the hot and cold vents or cold and heat sources.
Infrared alarm sensing is closely related to temperature changes. Both hot and cold vents and cold and heat sources may cause false alarms. For some low-performance detectors, air convection sometimes through doors and windows may also cause False positives.
4, it is not appropriate to face large objects that are easy to swing
A large swing of the object can instantaneously cause a sudden change in the airflow in the detection area and thus may also cause false alarms. It should be noted that the purpose of installing the detector on the illegal intrusion route is to prevent the illegal intrusion of criminals. Before determining the installation location, the main population of the building must be considered. In fact, we have prevented the entrance and exit and intercepted the illegal intrusion line, which has achieved our goal.
5, reasonable selection
There are also a variety of infrared alarm models. Ordinary infrared probes, curtains, advanced infrared detectors, three wide-angle detectors, etc. From 10 meters to 25 meters, from dual infrared to double detection to multiple inspection, from pet prevention to anti-blocking, anti-swing, wall-mounted to ceiling type, etc., the detectors to be installed should also consider the size of the space. , the surrounding environment, the characteristics of the entrance and exit and other actual conditions.
6, should not face the glass doors and windows
There are two problems with glass doors and windows: First, white light interference, although passive infrared detectors (PIR) have a strong suppression function for white light, but after all, it is not 100% suppression, so do not face the glass doors and windows, you can avoid strong The interference of light; the second is to avoid complicated environmental interference outside the door and window, such as direct sunlight, crowds, mobile vehicles, etc.
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