Intruder detection system with passive self-supervision

Details Intruder detection system with passive self-supervision Intruder detection system with passive self-supervision

1990-08-31

1991-10-15

Coles, Sr., Edward L.

Communications: electrical

Condition responsive indicating system

With particular system function

340509, 340514, 340518, 340523, 340526, 340527, 340528, G08B 2900

Patent

active

050578170

ABSTRACT:
A multizone intruder detection system comprises a supervisory circuit for verifying, from normal traffic or activity in each of the zones of protection while the system is disarmed, that each of the intrusion sensors is, indeed, functional. In the event one or more sensors does not trip (i.e., sense activity) during the disarm period, the supervisory circuitry inhibits re-arming of the system until the non-tripped senso(s) is "walk-tested" to verify that it is still functional. According to the invention, a programmable timer enables re=arming of the system for a predetermined (preferably brief) time interval immediately following disarmig of the system. This feature offers the edvantage of allowing the user to re-enter the protected premises "after hours" for a brief period of time without having to walk-test all zones of protection before re-arming the system.

REFERENCES:
patent: 4611197 (1986-09-01), Sansky
Detection Systems DS7100, 130 Perinton Parkway, Fairport, N.Y. 14450, May 16, 1991.

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