| 摘要 |
PROBLEM TO BE SOLVED: To provide a human body detection sensor capable of surely detecting the human body approaching toward the sensor entering into the detection area. SOLUTION: The human detection sensor composed of a plurality of pyroelectric elements of dual element constitution paired with plus polarity elements and minus polarity elements, a plurality of pyroelectric elements 12 and a plurality of detection areas are formed, wherein the plurality of detection areas, the detection areas of plus polarity adjoining to other groups and at least either area of the minus polarity elements are in relation of inverse polarity, based on the energy variation amount of infrared collected from the plurality of detection areas, the wave from signal and previously set threshold value are compared, from this comparison result the logic synthesis is performed, then the approaching of the human body is detected. COPYRIGHT: (C)2007,JPO&INPIT |
