Electricity: measuring and testing – Electrostatic field
Reexamination Certificate
2006-12-26
2006-12-26
Deb, Anjan (Department: 2858)
Electricity: measuring and testing
Electrostatic field
C340S561000
Reexamination Certificate
active
07154275
ABSTRACT:
A robust, easily deployable, covert, passive intrusion detection system uses one or more E-field sensors to detect the presence of a moving individual and to provide an indication of the presence of the individual adjacent the sensor based on E-field distortion produced by the individual. Single-ended and differential E-field sensors with noise canceling and a guarding circuit provide sufficient sensitivity, with filtering from 0.5 Hz to 8.0 Hz selecting only human intruders. Either visible or invisible flashing light sources at the sensor indicate the presence of a moving individual at the sensor, thus to provide intruder location without the necessity of providing a geolocation system.
REFERENCES:
patent: 2454630 (1948-11-01), Buckthal
patent: 3573817 (1971-04-01), Akers
patent: 3785557 (1974-01-01), Womack
patent: 3928801 (1975-12-01), Hill
patent: 4224540 (1980-09-01), Okubo
patent: 4553135 (1985-11-01), Grynberg et al.
patent: 4743886 (1988-05-01), Steiner et al.
patent: 4931740 (1990-06-01), Hassanzadeh et al.
patent: 4951045 (1990-08-01), Knapp et al.
patent: 5247281 (1993-09-01), Facon et al.
patent: 5300889 (1994-04-01), Bakhoum
patent: 5371509 (1994-12-01), Wallace et al.
patent: 5730165 (1998-03-01), Philipp
patent: 5986549 (1999-11-01), Teodorescu
patent: 6031378 (2000-02-01), Rosin
patent: 6456198 (2002-09-01), Kato et al.
patent: 2003/0209893 (2003-11-01), Breed et al.
Buchanan David W.
Succi George P.
Sutphin Eldon M.
Zank Paul A.
Bae Systems Information and Electronic Systems Integration Inc.
Deb Anjan
Long Daniel J.
Tendler Robert K.
LandOfFree
Method and apparatus for detecting individuals using... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for detecting individuals using..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for detecting individuals using... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3706778