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Pir Motion Sensor

Pir Motion Sensor

Using the infrared radiation heating, the probe of absorb radiant energy caused by temperature sensitive element, and then makes some relevant physical parameters change, by measuring the change of physical parameters to determine the infrared radiation received by the detector.

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This system is based on the principle of operation triangle  infrared existing detecting.The crosspoint of emission  ray and receive  ray is the max  detection  scope.


 In order to adapt  the background of  detector, the working system is combined  with the background rejection mode. Relevant   backgroud  will be  detected but be ignored. In the detection process, only the reflection of  detection area will be received. (Background rejection of humidity,ground will not be received.)


Background rejection techique:

--protection for the moving objects.

-- No affection of  the background factors.


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