| 摘要 |
<p>PROBLEM TO BE SOLVED: To install an inconspicuous crime prevention sensor having excellent amenity at low cost with simple execution on a veranda attached to a building. SOLUTION: Floodlighting parts are buried in supports 8, 8' on right and left both sides of a veranda fence 2, and light-receiving detection parts 14, 14' are buried in intermediate supports 9, 9', and a power source supply line 15 and a detection signal transmission line 16 are wired along an upper part horizontal bridge 10.</p> |
