| 摘要 |
<P>PROBLEM TO BE SOLVED: To reliably detect intrusion into a specific area. <P>SOLUTION: An intrusion detection device includes: a pair of optical marks arranged in the vicinity of both sides of a border for detecting intrusion; a blink control part by which, when one of the pair of optical marks is lighted the other is not lighted, and a different optical mark is lighted depending on the time; an optical sensor which receives light of the pair of optical marks for outputting signals according to the received light quantity; and a detection unit for detecting intrusion on the basis of the output of the optical sensor. <P>COPYRIGHT: (C)2013,JPO&INPIT |
