Intrusion detector

Details Intrusion detector Intrusion detector

1997-08-08

1999-08-10

Mofsass, Jeffery A.

Communications: electrical

Condition responsive indicating system

Specific condition

340522, 340521, 342 28, 342 53, G08B 1318

Patent

active

059365242

ABSTRACT:
A method for determining malfunction of a microwave intrusion detector which transmits microwave radiation into a region and receives microwave radiation to produce a receiver signal, such that a detection pattern of microwave pulses is transmitted periodically during an intrusion detection mode, including initiating a self-test mode of the detector, transmitting during the self-test mode a test pattern comprising a plurality of microwave pulses having at least two different duty cycles, different from the detection pattern, receiving microwave radiation in the self-test mode and generating a receiver signal responsive thereto and analyzing the receiver signal to derive a parameter responsive to the test pattern, so as to determine a malfunction condition.

REFERENCES:
patent: 3719812 (1973-03-01), Bishop et al.
patent: 3792470 (1974-02-01), Donovan et al.
patent: 3801978 (1974-04-01), Gershberg et al.
patent: 4605922 (1986-08-01), Blattman et al.
patent: 4611197 (1986-09-01), Sansky
patent: 4660024 (1987-04-01), McMaster
patent: 5077548 (1991-12-01), Dipoala
patent: 5093656 (1992-03-01), Dipoala
patent: 5150127 (1992-09-01), Aw
patent: 5287111 (1994-02-01), Shpater
patent: 5416487 (1995-05-01), Hampson
patent: 5450062 (1995-09-01), DiPoala
patent: 5491467 (1996-02-01), Tracy et al.

Affiliated with

Also associated with

Rating

Intrusion 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 Intrusion detector, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Intrusion detector will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1124141