| 摘要 |
The invention relates to a passive infrared motion detector comprising a base part (9) which holds a printed circuit board (7) with at least four passive IR sensors (8), IR receiver (7.1), brightness sensor (7.3) and further electronic components, a mirror arrangement (5) and a rectangular lens arrangement (3). The base part (9) is covered by a cover part (1), wherein preferably four spherical-cap-shaped and/or frustum-shaped lenses (3.1) with in each case a plurality of lens segments for registering motion are arranged in the corner regions of the rectangular lens arrangement (3). The mirror arrangement are arranged under the lens arrangement (3) is provided to increase the optical resolution of the lens arrangement (3), wherein the effective surfaces (5.1) of said mirror arrangement are provided with a reflecting coating. The cover part (1) situated over the lens arrangement (3) comprises a centrally arranged plastic web (1.1) with at least two openings (1.3), into which transparent cap parts (2) are inserted. Light channels (5.2), (5.3), which interact with the IR receiver (7.1) and brightness sensor (7.3) lying therebelow, are arranged under the cap parts (2). |
