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How #PIR_sensor (Passive InfraRed) #motion_detector detects movement at night / PIR සෙන්සර් එකක් සවිකරමු
In general, the #PIR #motion_sensor can detect the movement of animals or humans in a preferred range, and is to be used as an alarming unit, to detect the movement of unauthorized personnel.
Passive #Infrared motion detector is made of a Pyroelectric sensor, which is capable of generating a temporary voltage signal, according to the different levels of infrared radiation detected by it.
The detector itself does not emit any radiation, but receives it passively.
We need to know that, any object that emits heat from its surface is constantly radiating infrared rays into the atmosphere.
Infrared radiation is also produced from non-living objects in the environment.
But the sensor detects it and settles down with its radiation level initially.
Once it detects a different level of infrared radiation, probably from a human body, it generates the sudden electrical signal necessary, to operate the alarming signal.
PIR සෙන්සර් එක වැඩ කරන හැටි, එහි භාවිතය සහ එය සතුන්ගේ චලනයන් හදුනාගන්න හැටි දැනගනිමු.
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#engineering_technology
#How_PIR_sensor_work #how_PIR_detector_work #PIR_sensor_working_principle #PIR_motion_sensor_working_principle #how_PIR_sensor_detects_motion #how_to_install_PIR_sensor #what_is_PIR_sensor #What_is_PIR_motion_detector