| 摘要 |
A monitoring system 1 comprising an opposed mode sensor device S with a first height detection sensor 2 including a plurality of pairs of first projectors T1-T10 and first receivers R1-R10 opposed to each other that detects an intruder M by blocking a plurality of sensing paths extending in a substantially horizontal direction, and determines the intruder height H. A second height detection sensor 3 includes a single second projector T1a and a plurality of second receivers opposed to the second projector and detects a second intruder height measurement by blocking a plurality of sensing paths extending in an oblique direction from one side of the monitored area to the other side. A controller 5, comprising position detector 7, intrusion detector 6, alarm 8, and camera control, performs a calculation by using a trigonometric function on the basis of the distance measured within the monitored area to calculate the position of the intruder in the security area; A camera 4 captures an image of part of the monitored area. |
