Method and apparatus to distinguish human intruder and animal in

Details Method and apparatus to distinguish human intruder and animal in Method and apparatus to distinguish human intruder and animal in

1994-09-16

1995-12-05

Peng, John K.

Communications: electrical

Condition responsive indicating system

Specific condition

340522, 340541, 340554, 340552, 340565, 340550, 342 27, 342 28, G08B 1900

Patent

active

054733111

ABSTRACT:
An intrusion detection device of the dual sensing type has a PIR sensor to generate a PIR signal. The device also has a microwave sensor for generating a microwave amplitude signal. The microwave amplitude signal is filtered to generate a microwave high frequency signal which is the high frequency portion of the microwave amplitude signal. These three signals: PIR signal, microwave amplitude signal, and microwave high frequency signals are amplified and are digitized and are processed to generate an event signal. The event signal is compared to an event threshold signal and an alarm is generated in the event the event signal exceeds the event threshold signal. The event threshold signal represents the threshold to distinguish between a human intruder and an animal intruder.

REFERENCES:
patent: Re33824 (1992-02-01), Johnson
patent: 4401976 (1983-08-01), Stadelmayr
patent: 4546344 (1985-10-01), Guscott et al.
patent: 4625199 (1986-11-01), Pantus
patent: 5109216 (1992-04-01), Yarbrough et al.
patent: 5226416 (1993-07-01), Bethune
patent: 5266807 (1993-11-01), Neiger
Napco C-100ST Series, Adaptive Combination Microwave/PIR Sensor--Preliminary Data Sheet.

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