US 7,046,153 B2Granted

Tracking device

AssigneeVitalTrak Technology, Inc.

InventorsRaymond G. Oja, Roger A. Moore, Milton E. Hamilton, Michael Hreha

Life of this patent

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Abstract

A monitoring and locating device includes one or more remote child units and a parent unit in communication with each of the child units. The parent unit is adapted to assign and transmit an individual identifier to each child unit. The parent unit is constructed and arranged to continuously monitor each of the child units by transmitting and receiving signals to each of the child units using the individual identifiers assigned thereto. The monitoring and locating device may be used in a method for monitoring and tracking a living entity that includes acquiring the plurality of child units using the parent unit based at least in part on user input. Monitoring each of the plurality of child units individually with the parent unit. Tracking the location of each child unit with the parent unit and locating a selected child unit of the plurality of child units with the parent unit based upon the tracked location thereof.

Claims8

Dependent claims

A monitoring and locating device comprising:

at least one portable child unit;
and
a parent unit in communication with the portable child unit, the parent unit being configured to assign an individual identifier to each portable child unit by wireless radio frequency signal and configured to monitor each of the portable child units by transmitting and receiving signals to each of the portable child units based on the individual identifiers assigned thereto the parent and child units being configured to provide directional information as to a position of the child units with respect to the parent unit and a perimeter alarm when the child unit moves to a distance from the parent unit that is greater than a predetermined distance;
and a directional display coupled to a microprocessor constructed and arranged to display the position of a selected child unit relative to the parent unit based on phase differential signals generated by the microprocessor for the selected child unit;
and an operating channel selection circuit coupled to the microprocessor, the operating channel selection circuit constructed and arranged to select an operating channel on a frequency band for the parent unit to transmit or receive thereon.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 10/096,104Filed 13 Mar 2002 · us provisional application
Priority: 14 Mar 2001
Published: US 2002/0175820 A128 Nov 2002
Granted: 16 May 2006
Term ends: Not estimatedThe source records don’t support an estimate.

Classification11 codes

H04W 52/0277
By switching on or off the equipment or parts thereof: according to available power supply, e.g. switching off when a low battery condition is…
G08B 21/0222
Child monitoring systems using a transmitter-receiver system carried by the parent and the child: message structure or message content, e.g.…
G08B 21/0227
Child monitoring systems using a transmitter-receiver system carried by the parent and the child: system arrangements with a plurality of child units
G08B 21/023
Child monitoring systems using a transmitter-receiver system carried by the parent and the child: power management, e.g. system sleep and wake up…