Method and system for positional finding using RF, continuous and/or combined movement

• US 8,423,042 B2
• Filed: 09/19/2006
• Issued: 04/16/2013
• Est. Priority Date: 02/24/2004
• Status: Active Grant

• Current Assignee: Qualcomm Technologies Incorporated (Qualcomm, Inc.)
• Original Assignee: InvisiTrack, Inc.
• Inventors: Markhovsky, Russ, Mikhienko, Evgenii, Vityaev, Evgenii
• Primary Examiner(s): Afshar, Kamran
• Assistant Examiner(s): Behnamian, Shahriar
• Application Number:
  US11/532,946
• Publication Number:
  US 20070075898A1
• Time in Patent Office: 2,401 Days
• Field of Search: 455/456.1, 342/386
• US Class Current: 455/456.1
• CPC Class Codes: G01S 13/74 Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems
• CPC Class Codes: G01S 5/0284 Relative positioning
• CPC Class Codes: G01S 5/12 by co-ordinating position lines of different shape, e.g. hyperbolic, circular, elliptical or radial
• CPC Class Codes: G08B 13/2462 Asset location systems combined with EAS inventory, tracking, logistic G06Q10/00; entrance control systems G07C9/00
• CPC Class Codes: G08B 21/0202 Child monitoring systems using a transmitter-receiver system carried by the parent and the child
• CPC Class Codes: H04W 4/026 using orientation information, e.g. compass
• CPC Class Codes: H04W 4/027 using movement velocity, acceleration information

Abstract

A system for determining location of an object, the system including a Master Unit having an RF transceiver and adapted to measure distance to the Tag. The Master Unit has a first input from which it can derive its current position. The Master Unit transmits instructions to the Tag for movement in a predetermined direction. The Master Unit measures distance to the Tag after the movement in the predetermined direction. The Master Unit determines position of the Tag after the movement in the predetermined direction. The Tag can include a compass, a pedometer, and optionally an accelerometer, a solid-state gyroscope, an altimeter inputs for determining its current position by the Master Unit. The Master can optionally include a compass as well as a pedometer, an altimeter, an accelerometer, a solid-state gyroscope, an altimeter and a GPS receiver. Also, the Tag movement does not have to follow the Master'"'"'s direction. However, the Master Unit still will be able to determine the Tag location(s). Also, the roles of the Master Unit and Tag can be reversed.

Claims

1. A system for locating an object, comprising:

a Master Unit adapted to interface to a Tag to measure distance to the Tag;

the Master Unit having a first input, wherein the first input comprises any of a pedometer, an altimeter, an accelerometer and a solid-state gyroscope;

the Tag having a second input from which it can determine a distance the Tag has traveled, wherein the second input comprises any of a pedometer, an altimeter, an accelerometer and a solid-state gyroscope;

the Master Unit being adapted to transmitting instructions for movement to the Tag and to transmitting information related to the Master Unit'"'"'s movement to the Tag, wherein the information related to the Master Unit'"'"'s movement is obtained from the first input;

the Master Unit being adapted to receiving information related to the Tag'"'"'s movement from the Tag, wherein the information related to the Tag'"'"'s movement is obtained from the second input;

the Tag being adapted to receiving the instructions for movement and to receiving the information related to the Master Unit'"'"'s movement;

the Tag being adapted to transmitting the information related to the Tag'"'"'s movement to the Master Unit;

the Master Unit being adapted to determine distance to the Tag by using a ranging signal;

the Master Unit being adapted to determine a position of the Tag after the Tag'"'"'s movement without any additional position reference infrastructure; and

the Tag being adapted to determine the position of the Tag after the Tag'"'"'s movement without any additional position reference infrastructure.

2. The system of claim 1, wherein the Tag further comprises a compass input for moving the Tag in a direction specified by the instructions, for determination of the position of the Tag.

3. The system of claim 1, wherein the Master Unit derives position related information of the Tag based on one or more distance measurements and the second input.

4. The system of claim 1, wherein the Tag further comprises a compass input from which the Tag derives a direction of movement of the Tag, and wherein the Master Unit further comprises a compass input from which the Master Unit can derive a direction of movement of the Master Unit.

5. The system of claim 1, wherein the Master Unit is adapted to transmitting requests for telemetry information to the Tag for Tag diagnostics.

6. The system of claim 1, wherein the Master Unit is configured to receive any of status, telemetry and voice information from the Tag.

17. The system of claim 2, wherein the Master Unit can derive position related information of the Tag based on one or more distance measurements, the second input and the compass input.

18. The system of claim 1, wherein the Master Unit functions as the Tag, and the Tag functions as the Master Unit.

7. A system for locating an object, comprising:

a Master Unit adapted to interface to a Tag to measure a distance to the Tag;

the Master Unit having a first input, wherein the first input comprises any of a pedometer, an altimeter, an accelerometer and a solid-state gyroscope;

the Master Unit having an interface to an operator of the Master Unit;

the Tag having an interface for instructing an operator of the Tag to move;

the Tag having a second input from which the Tag can determine a distance the Tag has traveled, wherein the second input comprises any of a pedometer, an altimeter, and accelerometer and a solid state gyroscope;

the Master Unit being adapted to transmitting instructions for movement to the Tag and to transmitting information related to the Master Unit'"'"'s movement to the Tag, wherein the information related to the Master Unit'"'"'s movement is obtained from the first input;

the Master Unit being adapted to receiving information related to the Tag'"'"'s movement from the Tag, wherein information related to the Tag'"'"'s movement is obtained from the second input;

the Tag being adapted to receiving the instructions for movement;

the Tag being adapted to transmitting the information related to the Tag'"'"'s movement to the Master Unit;

the Master Unit being adapted to determine a distance to the Tag by using a ranging signal;

the Master Unit being adapted to determine a position of the Tag after the Tag'"'"'s movement without any additional position reference infrastructure; and

the Tag being adapted to determine the position of the Tag after the Tag'"'"'s movement without any additional position reference infrastructure.

8. The system of claim 7, wherein the Master Unit is adapted to determine the position of the Tag after the Tag'"'"'s movement in any direction, based on one or more previous distance measurements.

9. The system of claim 7, wherein the Master Unit is adapted to determine the position of the Tag during a combined movement of the Master Unit and the Tag.

10. The system of claim 7, wherein the Tag'"'"'s movement is based on the instructions for movement.

11. The system of claim 7, wherein the Tag'"'"'s movement is independent of the Master Unit.

12. The system of claim 7, wherein the Master Unit functions as the Tag and the Tag functions as the Master Unit.

13. A method for locating an object, comprising the steps of:

interfacing a Master Unit to a Tag;

determining a first distance to the Tag from the Master Unit using a ranging signal;

at the Master Unit, receiving a first input, wherein the first input comprises any of a pedometer, an altimeter, an accelerometer, a compass and a solid-state gyroscope;

at the Tag, receiving a second input and deriving a second distance and direction the Tag has traveled based on the second input, wherein the second input comprises any of a pedometer, and altimeter, an accelerometer, a compass and a solid-state gyroscope;

transmitting instructions to the Tag for movement of the Tag;

at the Master Unit, receiving information from the Tag relating to the Tag'"'"'s movement;

the Master Unit being adapted to determine one or more additional distance measurements to the Tag from the Master Unit after the Tag'"'"'s movement without any additional position reference infrastructure; and

the Master Unit being adapted to determine one or more positions of the Tag after the Tag'"'"'s movement without any additional position reference infrastructure.

14. The method of claim 13, wherein the Master Unit derives its current position based on the first input.

15. The method of claim 13, further comprising transmitting requests for telemetry information from the Master Unit to the Tag for Tag diagnostics.

16. The method of claim 13, further comprising transmitting voice information to the Tag for instructing the Tag to move in a predetermined direction pattern.

19. The method of claim 13, wherein the instructions for movement of the Tag include instructions for movement of the Tag in a predetermined direction and distance pattern.

20. The method of claim 13, wherein the instructions for movement of the Tag include instructions for movement of the Tag in a predetermined direction pattern.