Systems and Methods for Position Tracking Using Magnetoquasistatic Fields

• US 20110316529A1
• Filed: 06/28/2010
• Published: 12/29/2011
• Est. Priority Date: 06/28/2010
• Status: Abandoned Application

• Current Assignee: Carnegie Mellon University, Disney Enterprises Incorporated (The Walt Disney Company)
• Original Assignee: Carnegie Mellon University, Disney Enterprises Incorporated (The Walt Disney Company)
• Inventors: Stancil, Daniel D., Arumugan, Darmindra D., Griffin, Joshua D.
• Application Number:
  US12/824,894
• Publication Number:
  US 20110316529A1
• Time in Patent Office: Days
• US Class Current: 324/207.22
• CPC Class Codes: A63B 2024/0025 Tracking the path or location of one or more users, e.g. players of a game
• CPC Class Codes: A63B 2024/0034 during flight
• CPC Class Codes: A63B 2243/007 American football
• CPC Class Codes: A63B 24/0021 Tracking a path or terminating locations
• CPC Class Codes: A63B 43/00 Balls with special arrangements
• CPC Class Codes: G01B 7/003 for measuring position, not involving coordinate determination coordinate measuring G01B7/004
• CPC Class Codes: G01S 5/0247 Determining attitude
• CPC Class Codes: H01Q 7/00 Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop

Abstract

Embodiments of the invention broadly contemplate systems, methods, apparatuses and program products that provide position tracking using a simple, low frequency oscillator that is attached to an object to be tracked, and one or more receiving stations that are placed around the area in which the object moves. Embodiments of the invention enable position tracking of the object using light weight equipment which minimally impacts the object'"'"'s natural state.

Claims

1. A system comprising:

one or more processors;

a receiving module configured to receive one or more inputs derived from an emitter configured to emit quasistatic magnetic fields; and

a program storage device tangibly storing a program of instructions executable by the one or more processors, the program of instructions comprising;

computer readable program code configured to utilize the one or more inputs to determine an above ground position of said emitter utilizing complex image theory.

2. The system according to claim 1, wherein the program of instructions further comprises computer readable program code configured to take into account an image dipole in the one or more inputs using complex image theory.

3. The system according to claim 1, wherein the quasistatic magnetic fields are those of a magnetic dipole.

4. The system according to claim 1, wherein the one or more inputs correspond to one or more of a magnitude and a direction of the quasistatic fields produced by said emitter.

5. The system according to claim 1, wherein said emitter comprises a low frequency oscillator.

6. The system according to claim 5, wherein the low frequency oscillator is configured to emit the quasistatic magnetic fields at a frequency not greater than 1 MHz.

7. The system according to claim 1, wherein the emitter further comprises an antenna having one or more loops of wire.

8. The system according to claim 1, further comprising:

one or more antennas operatively coupled to the receiving module, the one or more antennas being configured to receive the one or more inputs of the emitter and transmit data corresponding to the one or more inputs to the receiving module.

9. The system according to claim 7, wherein the emitter weighs approximately 10 oz or less.

10. The system according to claim 1, wherein the program of instructions further comprises computer readable program code configured to utilize the one or more inputs to track said emitter utilizing complex image theory as said emitter moves above ground.

11. The system according to claim 1, further comprising an emitter configured to emit quasistatic magnetic fields, said emitter being powered by one or more of batteries, ultracapacitors or a wireless mechanism.

12. An apparatus comprising:

an emitter configured to emit quasistatic magnetic fields suitable for position location and tracking;

said emitter being configured to weigh approximately 10 oz or less.

13. The apparatus according to claim 12, wherein the quasistatic magnetic fields are those of a magnetic dipole.

14. The apparatus according to claim 12, wherein a magnitude and a direction of the quasistatic fields correspond to a location and orientation of the emitter above ground.

15. The apparatus according to claim 12, wherein the emitter is configured to emit the quasistatic magnetic fields at a frequency not greater than 1 MHz.

16. The apparatus according to claim 12, wherein the emitter further comprises an antenna including one or more loops of wire positioned about the emitter.

17. The apparatus according to claim 16, wherein the emitter and the one or more loops of wire are configurable within a game-play object selected from the group consisting of an American football and a soccer ball.

18. The apparatus according to claim 12, wherein the emitter is configured to emit the quasistatic magnetic fields measurable via one or more antennas placed at least 25 yards away from the emitter.

19. The apparatus according to claim 18, wherein the emitter is configured to weigh approximately 1 oz or less.

20. A method comprising:

receiving one or more inputs derived from an emitter configured to emit quasistatic magnetic fields; and

utilizing the one or more inputs to determine an above ground position of said emitter utilizing complex image theory.

21. A computer program product comprising:

a computer readable storage medium having computer readable program code embodied therewith, the computer readable program code comprising;

computer readable program code configured to receive one or more inputs derived from quasistatic magnetic field data emitted from an emitter; and

computer readable program code configured to utilize the one or more inputs to determine an above ground position of said emitter utilizing complex image theory.