Title:
TAGGING SYSTEM USING MOTION DETECTOR
Document Type and Number:
WIPO Patent Application WO1998053343
Kind Code:
A9
Abstract:
The present invention relates generally to a tag monitoring system network (16) used for tracking object movement. The tags (10) utilized in the system incorporate a motion sensor (18) which detects object movement and includes a signal generation circuit adapted to generate a signal when motion is detected. A microcontroller (20) is provided which is in electrical communication with the motion sensor (18) and includes a transmitter activation circuit wherein said microcontroller (20) includes a preprogrammed transmitter sequence which is activated by receipt of a signal from the motion sensor (18). A radio transmitter (12) is also provided on the tag (10) which is in electrical communication with the microcontroller (20), and generates radio signals at the direction of the microcontroller (20).
Inventors:
GUTHRIE WARREN E
PAPPADIA JOSEPH F JR
PAPPADIA JOSEPH F JR
Application Number:
PCT/US1998/010290
Publication Date:
April 01, 1999
Filing Date:
May 19, 1998
Export Citation:
Assignee:
NORTHROP GRUMMAN CORP (US)
International Classes:
G01V3/00; G01V15/00; G06K17/00; G06K19/07; G08B13/14; G08B13/24; H04B1/59; H04B5/02; (IPC1-7): G08B13/14; G08B1/08
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