| 摘要 |
PROBLEM TO BE SOLVED: To provide a passive infrared sensor for adjacently disposing a plurality of detectors comprising infrared detecting elements and optical systems and having different alarm distances within a housing, individually setting the number of detections of each detector, and easily obtaining a high-accuracy detection performance, regardless of the alarm distance. SOLUTION: The passive infrared sensor includes: the detectors disposed within the housing comprising a base and a cover, and having the optical systems and the infrared detecting elements; and a signal processing means for processing signals detected by the detectors. The detectors are composed of a plurality of the detectors comprising the optical systems and the infrared detecting elements, individually and adjacently disposed at an adjustable angle, and having different alarm distances. The signal processing means singularly processes the signals detected by a plurality of the detectors, and outputs a human body detection signal when a human body is detected by any detector. In a plurality of the detectors, the number of detections until the human detection signal is output can be individually set. COPYRIGHT: (C)2010,JPO&INPIT
|
