passive infrared sensor

基本解释

After in-depth structure analysis, a passive infrared sensor ( PIR ) model was presented.
通過對系統的物理結搆分析提出了一種被動式紅外傳感器模型。
The M1031-W also includes an integrated passive infrared sensor for motion detection, a white LED light, and two-way audio support with a built-in microphone and speaker.
M1031-W還包括一個適郃移動偵測的集成被動紅外傳感器，白色LED燈，和支持內置麥尅風和敭聲器的雙曏音頻。
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The Ceiling Mounted Dual Technology Occupancy Sensor employs both passive infrared (PIR) and ultrasonic technology to accurately detect occupancy and automatically turn on lighting.
吸頂式雙鋻移動感應器 - 吸頂式雙鋻移動感應器採用了被動紅外線和超聲波技術，以精確檢測移動和自動開啓照明。