| Results found for: PIR sensor |
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| PIR sensor |
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(Passive InfraRed sensor) A device used to detect motion by receiving infrared radiation. When a person walks past the sensor, it detects a rapid change of infrared energy and sends a signal. PIR sensors are used for applications such as automatically turning on lights when someone enters a room or causing a video camera to begin operating.
This passive method is not as reliable as "active" motion sensors that either bounce back a radar signal or transmit light to a photodetector in the distance. See network camera.
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Entries before PIR sensor
pipeline
pipeline burst cache
pipeline processing
Pippin
PIR
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Entries after PIR sensor
piracy
piracy investigator
Pistorius
pit
PITA
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