Intrusion detection system having improved immunity to false ala

Details Intrusion detection system having improved immunity to false ala Intrusion detection system having improved immunity to false ala

1990-10-16

1992-04-21

Ng, Jin F.

Communications: electrical

Condition responsive indicating system

Specific condition

340522, 340526, G08B 1300

Patent

active

051072491

ABSTRACT:
A multi-sensor intrusion detection system having improved immunity to false alarm is disclosed. The sensor being less susceptible to the generation of false alarm has its output signal processed and held. The held signal is supplied to a logic gate which receives directly the signal from the other sensor. The output of the logic gate generates an alarm signal.

REFERENCES:
patent: 4134109 (1979-01-01), McCormick
patent: 4668941 (1987-05-01), Davenport
patent: 4853677 (1989-08-01), Yarbrough et al.
patent: 4882567 (1989-02-01), Johnson
patent: 4928085 (1990-05-01), DuRand, III et al.

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