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Passive infrared detector installation should pay attention to what issues?
Category:The industry   Publish:2014-07-07 13:54:11   View:2447次 [Back]
Due to the passive infrared detectors are kind of weak signal detection devices, installation problems must pay attention to some details, such as height, sensitivity, and so on. A passive infrared detector is installed correctly, you must have the information: the first is the detector performance characteristics must be understood, second to reasonably determine the installation position, and finally must be carefully debugging. Can't say detectors can alarm description installing okay, so how do you determine a passive infrared detector installation location?   
  
  According to the installation angle
  
Mounting height is not random, and will affect the sensitivity of the detector and pet-proof effect. Imagine a probe installed in the 2m height of the location and 2.5M location, so moving objects from the ground moves, cutting frequency of light areas and dark areas are not the same.   
  
  Should not be facing the glass doors and Windows
  
Passive infrared detectors on glass Windows and doors, there will be two issues: one is the white-light interference, PIR obviously White has a strong sense of inhibition, but not 100% to the curb. So it can avoid being on glass Windows and doors, light interference can be avoided. Second, avoiding complex environmental disturbance outside the doors and Windows, such as the flow of people, vehicles and so on.   
  
  Not being hot and cold air vents or heat source
  
Passive infrared detector is has a close relationship with temperature changes. Cooling and heating vents and cold and heat source may cause the detector's false positive, for some low-performance detectors, sometimes by air convection can also cause a false positive for doors and Windows.   
  
  Objects should not be easily swung
  
Easily swung the object will make the microwave detectors work, so the same may cause false positives. Note that illegal invasion route, install detectors foot designed to prevent criminals access, determine the installation position, have to consider building the main population. We actually prevent entrance to cut off illegal invasion route, it served our purpose.   
  
  Rational selection of
  
Passive infrared detector has a variety of models. From 6 meters to 60 meters, from changong to all three technologies, from wall-mounted to the ceiling, the space probe that women must be taken into account to prevent the size of the surrounding environment, import/export features and other situations. Sometimes consider Fresnel lens replaced to meet the requirements.

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