Intrusion detection system and a method therefor

Details Intrusion detection system and a method therefor Intrusion detection system and a method therefor

1988-09-29

1989-11-21

Crosland, Donnie L.

Communications: electrical

Condition responsive indicating system

With particular system function

340551, 340565, 340552, 340554, 340561, 367 93, G08B 1900

Patent

active

048825670

ABSTRACT:
A dual sensing intrusion detection system includes a passive infrared radiation detection sensor that generates a first output signal in response to the detection of an intruder in the volume of space. A second detection sensor is directed to the same volume of space and generates a second output signal in response to detection of the intruder. A switch activates the second detection sensor in response to the detection of the intruder by the infrared radiation detector. Logic circuit receives the first and second output signals and produces an alarm signal in response thereto to indicate the detection of the presence of the intruder in the volume of space.

REFERENCES:
patent: 4437089 (1984-03-01), Achard
patent: 4660024 (1987-04-01), McMaster
patent: 4772875 (1988-09-01), Maddox et al.

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