Remote tracking and sensing system and method

• US 6,067,044 A
• Filed: 09/21/1998
• Issued: 05/23/2000
• Est. Priority Date: 09/21/1998
• Status: Expired due to Fees

• Current Assignee: GPS Technology Solutions, LLC
• Original Assignee: Digital Systems Research Inc.
• Inventors: Whelan, Terrence William, Kashani, Amir Hossein Matini
• Primary Examiner(s): Tarcza, Thomas H.
• Assistant Examiner(s): PHAN, DAO LINDA
• Application Number:
  US09/157,475
• Time in Patent Office: 610 Days
• Field of Search: 342/357.06, 342/357.07, 342/456, 701/117, 701/213
• US Class Current: 342/357.74
• CPC Class Codes: G01S 19/34 Power consumption
• CPC Class Codes: G01S 5/0027 of actual mobile position, i.e. position determined on mobile
• CPC Class Codes: G08G 1/207 with respect to certain areas, e.g. forbidden or allowed areas with possible alerting when inside or outside boundaries

Abstract

A remote tracking and sensing device (20) includes a global positioning system receiver (22). A processor (24) receives a position signal from the global positioning system receiver (22). A communication interface (30) connects the processor (24) to at least two wireless communication systems (26, 28). A power management system (32) provides power to the processor (24) based on an output (38) from a motion sensor (40).

Claims

1. A remote tracking and sensing device, comprising:

a global positioning system receiver;

a processor receiving a position signal from the global positioning system receiver;

a communication interface connecting the processor to at least two wireless communication systems, the at least two wireless communication systems designed to transmit the position signal; and

a power management system providing power to the processor based on an output from a motion sensor.

2. The remote tracking and sensing system of claim 1, wherein the motion sensor is a vibration sensor.

3. The remote tracking and sensing system of claim 1, wherein the motion sensor is an accelerometer.

4. The remote tracking and sensing system of claim 1, wherein the power management system includes an electronic switch that is controlled by an ignition sensor.

5. The remote tracking and sensing system of claim 1, wherein the processor selects a second of the at least two wireless communication systems, when the first of the at least two wireless communication systems is unable to transmit a message.

6. The remote tracking and sensing system of claim 5, wherein one of the at least two wireless communication systems is a satellite communication system.

7. The remote tracking and sensing system of claim 6, further including a sensor interface connected to the processor, the sensor interface receiving a sensor information and transmitting the sensor information over the satellite communication system.

8. The remote tracking and sensing system of claim 1, wherein the processor includes a virtual fence routine.

9. The remote tracking and sensing system of claim 8, wherein the virtual fence routine defines a boundary by a time and a location boundary.

10. The remote tracking and sensing system of claim 9, wherein the processor sends a position message over one of the at least two wireless communication when the remote tracking and sensing system breaks the boundary.

11. A method of operating a remote tracking and sensing system, comprising the steps of:

(a) attaching the remote tracking and sensing system to a device;

(b) determining a boundary when a device is turned off;

(c) when a motion sensor indicates that the device is moving, determining a position of the device; and

(d) when the device is outside of the boundary, sending a position message over a wireless communication system.

12. The method of claim 11, wherein step (d) further includes the step of:

(d1) determining a received signal strength for the wireless communication system;

(d2) when the received signal strength is less than a predetermined signal strength, switching to a second wireless communication system and sending the position message.

13. The method of claim 11, wherein step (b) includes the steps of:

(b1) defining a maximum distance from an initial position the device can travel;

(b2) defining a time period during which the boundary is active.

14. The method of claim 11, wherein step (a) further includes the step of attaching an ignition sensor to an ignition system of the device.

15. The method of claim 14, wherein step (c) further includes the step of:

(c1) when the ignition sensor indicates that the ignition system is on, determining a position of the device.

16. A tracking and traffic control system, comprising:

a global positioning system receiver;

a processor receiving a position signal from the global positioning system receiver, the processor determining a block based on the position signal and a vehicle information, wherein the position signal is sent periodically and the block is updated each time the position signal is determined;

a communication interface linking the processor to a communication system; and

a central control system receiving the block over the communication system.

17. The tracking and traffic control system of claim 16, wherein the central control system monitors a plurality of blocks from a plurality of vehicles.

18. The tracking and traffic control system of claim 17, wherein the central control system transmits a traffic control information when one of the plurality of vehicles exceeds a vehicle dynamic parameter specification.

19. The tracking and traffic control system of claim 18, wherein the traffic control information is sent to a traffic control signal system.

20. A method of operating a tracking and traffic control system, comprising the steps of:

(a) attaching a position sensing system to a vehicle;

(b) determining a position of the vehicle periodically;

(c) transmitting the position, at regular time intervals, to a central traffic control system;

(d) calculating a vehicle block based on the position information; and

(e) communicating a traffic control information from the central traffic control system to the vehicle.

21. The method of claim 20, wherein step (e) includes the step of:

(e1) transmitting the traffic control information to a traffic control signal system.

22. The method of claim 20, wherein the step of determining the position includes the step of using a global positioning system receiver to determine the position.