Size discriminating dual element PIR detector

Details Size discriminating dual element PIR detector Size discriminating dual element PIR detector

1997-01-28

1999-07-13

Hofsass, Jeffery A.

Communications: electrical

Condition responsive indicating system

Specific condition

250342, 250DIG1, G08B 1318

Patent

active

059232501

ABSTRACT:
A dual element PIR detector for a security system uses a series of beams in selected areas to limit the amount of radiation received from small domestic pets. A series of alternating beams define dead zones and the beams and dead zones provide size discrimination where a small domestic cat or other small pet does not have sufficient size to cause IR responses in two sensors sufficient to cause an alarm condition.

REFERENCES:
patent: 4746910 (1988-05-01), Pfister et al.
patent: 4764755 (1988-08-01), Pedtke et al.
patent: 4841284 (1989-06-01), Biersdorff
patent: 4849635 (1989-07-01), Sugimoto
patent: 4990783 (1991-02-01), Muller et al.
patent: 5453733 (1995-09-01), Peterson et al.
patent: 5461231 (1995-10-01), Sugimoto et al.

Affiliated with

Also associated with

Rating

Size discriminating dual element PIR detector does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Size discriminating dual element PIR detector, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Size discriminating dual element PIR detector will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2279567