Systems and methods for position tracking using magnetoquasistatic fields

• US 9,625,247 B2
• Filed: 05/29/2014
• Issued: 04/18/2017
• Est. Priority Date: 06/28/2010
• Status: Active Grant

• Current Assignee: Carnegie Mellon University, Disney Enterprises Incorporated (The Walt Disney Company)
• Original Assignee: Disney Enterprises Incorporated (The Walt Disney Company)
• Inventors: Arumugam, Darmindra D., Trotter, Matthew, Griffin, Joshua, Ricketts, David, Stancil, Daniel
• Primary Examiner(s): PATEL, PARESH H
• Application Number:
  US14/290,156
• Publication Number:
  US 20140266164A1
• Time in Patent Office: 1,055 Days
• Field of Search: None
• CPC Class Codes: A63B 2041/005 with counterweight for adjusting the centre of gravity
• CPC Class Codes: A63B 2220/12 Absolute positions, e.g. by using GPS
• CPC Class Codes: A63B 2220/16 Angular positions
• CPC Class Codes: A63B 2225/50 Wireless data transmission, e.g. by radio transmitters or telemetry
• CPC Class Codes: A63B 2243/0025 Football American football A63B2243/007
• CPC Class Codes: A63B 2243/007 American football
• CPC Class Codes: A63B 43/004 electrically conductive, e.g. for automatic arbitration
• CPC Class Codes: G01B 7/004 for measuring coordinates of points
• CPC Class Codes: G01D 5/145 influenced by the relative movement between the Hall device and magnetic fields see G01R33/06

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 inputs derived from an emitter configured to include one or more antennas emitting quasistatic magnetic fields;

said emitter comprising a multi-turn loop and an integrated circuit disposed about a central part of an interior cavity of a ball, wherein said multi-turn loop is wound around an inner lining of the ball; and

a program storage device tangibly storing a program of instructions executable by the one or more processors to utilize the one or more inputs to determine an above ground position and orientation of the emitter with respect to the receiving module utilizing complex image theory, a fingerprinting technique, or the combination thereof.

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 inputs derived from the emitter correspond to one or more of a magnitude and a direction of the quasistatic fields produced by the emitter.

4. The system according to claim 1, wherein the multi-turn loop is positioned around a core of a magnetic material such as ferrite.

5. The system according to claim 1, wherein the emitter weighs approximately 1 oz or less.

6. The system according to claim 1, wherein the emitter is powered by one or more of batteries, ultracapacitors, or a wireless mechanism.

7. The system according to claim 1, wherein:

the receiving module receives inputs at two or more frequencies from the emitter; and

the instructions are further executable by the processor to utilize the inputs at two or more frequencies to determine the above ground position of the emitter.

8. An apparatus comprising:

an above ground emitter including one or more antennas configured to emit quasistatic magnetic fields measurable by one or more antennas placed at least 25 yards away from the emitter and suitable for the detection and tracking of the emitter'"'"'s position and orientation by the one or more antennas placed at least 25 yards away from the emitter;

said emitter comprising a multi-turn loop and an integrated circuit disposed about a central part of an interior cavity of a ball, wherein said multi-turn loop is wound around an inner lining of the ball.

9. The apparatus according to claim 8, wherein the quasistatic magnetic fields are those of a magnetic dipole.

10. The apparatus according to claim 8, wherein the multi-turn loop is positioned around a core of a magnetic material such as ferrite.

11. The apparatus according to claim 8, wherein the ball is selected from the group consisting of an American football, a basketball, and a soccer ball.

12. The apparatus according to claim 8, wherein the one or more antennas emit quasistatic magnetic fields at two or more frequencies.

13. A method comprising:

receiving inputs derived from an emitter configured to emit quasistatic magnetic fields;

said emitter comprising a multi-turn loop and an integrated circuit disposed about a central part of an interior cavity of a ball, wherein said multi-turn loop is wound around an inner lining of the ball; and

utilizing a subset of the inputs to determine an above ground position and orientation of the emitter utilizing complex image theory, a fingerprinting technique, or the combination thereof.

14. The method according to claim 13, wherein:

the receiving comprises receiving inputs at two or more frequencies; and

the utilizing comprises using the inputs at two or more frequencies to determine the above ground position of the emitter.

15. 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 inputs derived from quasistatic magnetic field data emitted from an emitter;

said emitter comprising a multi-turn loop and an integrated circuit disposed about a central part of an interior cavity of a ball, wherein said multi-turn loop is wound around an inner lining of the ball; and

computer readable program code configured to utilize the inputs to determine an above ground position and orientation of the emitter with respect to a receiving module utilizing complex image theory, a fingerprinting technique, or the combination thereof.

16. The computer program product according to claim 15, wherein:

the computer readable program code configured to receive inputs comprises computer readable program code configured to receive inputs at two or more frequencies; and

the computer readable program code configured to utilize the inputs to determine an above ground position and orientation of the emitter comprises computer readable program code configured to use the inputs at two or more frequencies to determine the above ground position of the emitter.