Phase shift analysis for vehicle intrusion detection

Details Phase shift analysis for vehicle intrusion detection Phase shift analysis for vehicle intrusion detection

1993-02-01

1995-03-07

Swann, Glen

Communications: electrical

Land vehicle alarms or indicators

Of burglary or unauthorized use

340552, 340553, 340554, 367 93, 367 94, G08B 1316

Patent

active

053962176

ABSTRACT:
Intrusion into an automotive vehicle interior is detected by passing an airborne acoustic signal through a portion of the vehicle interior when the vehicle security system is active, and by measuring any change in phase in the signal as it passes through the vehicle. The phase of a first frequency component in the signal is sensitive to intrusion into the vehicle, and the phase of a second frequency component is sensitive to false alarm conditions, but is not sensitive to intrusion.

REFERENCES:
patent: 3681745 (1972-08-01), Perlman et al.
patent: 4638294 (1987-01-01), Sakurai
patent: 4866417 (1989-09-01), DeFino et al.
patent: 5049858 (1991-09-01), Price
patent: 5077548 (1991-12-01), Dipoala
patent: 5079538 (1992-01-01), DeFino et al.

Affiliated with

Also associated with

Rating

Phase shift analysis for vehicle intrusion detection does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Phase shift analysis for vehicle intrusion detection, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Phase shift analysis for vehicle intrusion detection will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1409256