Opto-electronic security fence

Details Opto-electronic security fence Opto-electronic security fence

1991-09-26

1993-03-30

Mullen, Thomas

Communications: electrical

Condition responsive indicating system

Specific condition

250221, 340502, 340556, 340693, 455 90, G08B 1318, H04B 138

Patent

active

051987996

ABSTRACT:
A surveillance fence comprising at least two posts (10) each equipped with electro-magnetic radiation transmitters (12) and receivers (14) which establish two parallel communications links. Each posts (10) communicate with a surveillance computer at a headquarters (20). Only one post (10) communicates directly via cables with headquarters (20). Data is transmitted over the communication links in opposite directions by modulating the electromagnetic energy beams. A message starts at headquarters (20) and is passed along post (10) to post (10) and back again to headquarters (20). Each post (10) can add information to the message as it is passed along. The interruption of the electromagnetic energy beams signals an intrusion whose location and time of occurence is recorded by a processor (16) which initiates an alarm. If a post (10) can not relay its intrusion data, the data is stored until the communications link is reestablished. The intrusion data stored at a post (10) will not be erased until an acknowledge message is received from headquarters (20).

REFERENCES:
patent: 3711846 (1973-01-01), Schlisser et al.
patent: 3825916 (1974-07-01), Steele et al.
patent: 4978942 (1990-12-01), Bruce

Affiliated with

Also associated with

Rating

Opto-electronic security fence does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Opto-electronic security fence, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Opto-electronic security fence will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1284045