Positioning module

• US 8,660,786 B2
• Filed: 08/17/2011
• Issued: 02/25/2014
• Est. Priority Date: 08/17/2011
• Status: Active Grant

• Current Assignee: Raytheon Company (Rtx Corporation)
• Original Assignee: Raytheon Company (Rtx Corporation)
• Inventors: Bengtson, William T., Hayata, Keith T.
• Primary Examiner(s): Trammell, James
• Assistant Examiner(s): Malhotra, Sanjeev
• Application Number:
  US13/211,657
• Publication Number:
  US 20130046463A1
• Time in Patent Office: 923 Days
• Field of Search: 701/207, 702/14, 704/9, 707/770, 600/141, 600/595, 310/334, 340/573.1, 341/20, 355/67, 358/1.12, 382/103
• US Class Current: 701/216
• CPC Class Codes: G01C 21/1654 with electromagnetic compass
• CPC Class Codes: G01C 22/00 Measuring distance traversed on the ground by vehicles, persons, animals or other moving solid bodies, e.g. using odometers, using pedometers

Abstract

A positioning device includes a magnetometer configured to detect and provide heading information, a motion sensor configured to detect and provide motion information, a microcontroller coupled to the magnetometer and the motion sensor and configured to generate position data based on the heading information and the motion information, a transmitter coupled to the microcontroller and configured to wirelessly transmit a signal including the position data, and a piezoelectric power source configured to supply power to at least one of the microcontroller, the magnetometer, the motion sensor and the transmitter.

Claims

1. A positioning device for detecting position of a person, comprising:

a magnetometer configured to detect heading of the person and provide heading information;

a motion sensor configured to detect movement of the person and provide motion information;

a microcontroller coupled to the magnetometer and the motion sensor and configured to generate position data based on the heading information and the motion information;

a transmitter coupled to the microcontroller and configured to wirelessly transmit a signal including the position data;

a piezoelectric power source configured to supply power to at least one of the microcontroller, the magnetometer, the motion sensor and the transmitter, wherein the positioning device is embedded into an article of footwear worn by the person; and

a Global Positioning System (GPS) wirelessly coupled to the positioning device, configured to;

receive the signal from the transmitter including the position data, and

determine position in a GPS-denied environment responsive to receiving the position data from the transmitter.

2. The positioning device of claim 1, wherein the motion sensor is further configured to detect motion of the positioning device along at least two orthogonal axes with respect to an external reference point.

3. The positioning device of claim 2, wherein the motion sensor includes an accelerometer.

4. The positioning device of claim 2, wherein the motion sensor includes an inertial measurement unit (IMU).

5. The positioning device of claim 4, wherein the IMU is implemented in a microelectricalmechanical system (MEMS) device.

6. The positioning device of claim 1, further comprising an integrated housing, the microcontroller, the magnetometer, the motion sensor, the transmitter, and the piezoelectric power source disposed within the integrated housing.

7. The positioning device of claim 6, wherein the integrated housing is configured to be disposed within an insole of the article of footwear and is configured to hold the positioning device within the insole.

8. The positioning device of claim 7, wherein the piezoelectric power source is configured to accumulate an electrical charge in response to a mechanical force to be applied to the piezoelectric power source through the article of footwear.

9. The positioning device of claim 1, wherein the position data includes a unique identification number associated with the positioning device.

10. The positioning device of claim 9, wherein an external navigation system is logically paired with the positioning device based on the unique identification number, the external navigation system being configured to receive the position data.

11. A method of determining a position of a person using a positioning device, the method comprising:

providing electric power from a piezoelectric power source to at least one of a microcontroller, a magnetometer, a motion sensor, and a transmitter, wherein the microcontroller, the magnetometer, the motion sensor, and the transmitter are embedded into an article of footwear worn by the person;

detecting motion of the person using the motion sensor;

obtaining motion information using the motion sensor in response to detecting the motion of the person;

obtaining heading information of the person using the magnetometer in response to detecting the motion of the person;

generating position information of the person based on the heading information and the motion information using the microcontroller; and

wirelessly transmitting a signal including the position information using the transmitter; and

determining a position for the person in a GPS-denied environment based on the position data generated by the microcontroller.

12. The method of claim 11, wherein generating the position information includes determining a quantity representing a change in geographic position of the person with respect to a prior geographic position of the person.

13. The method of claim 12, wherein the quantity includes at least one of a distance traveled by the person from the prior geographic position and a direction traveled by the person from the prior geographic position.

14. The method of claim 11, further comprising determining a geographic position of the person based at least in part on the position information.

15. The method of claim 14, wherein determining the geographic position includes calculating a current geographic position of the person using the position information and a previously known geographic position of the person.

16. The method of claim 11, wherein generating the position information further includes providing a unique identification number associated with the positioning device.

17. The method of claim 16, further comprising logically pairing the positioning device with an external navigation system using the unique identification number.

18. The method of claim 11, wherein the piezoelectric power source is coupled to an article of footwear, and wherein the method further comprises accumulating an electrical charge in response to a mechanical force to be applied to the piezoelectric power source via the article of footwear.

19. A positioning device for detecting position of a person, comprising:

a piezoelectric power source embedded into an article of footwear worn by the person;

means embedded into the article of footwear worn by the person coupled to the piezoelectric power source for determining a relative change in geographic position of the person by determining the relative change in geographic position of the positioning device;

a transmitter coupled to the piezoelectric power source and configured to transmit a signal including data representing the relative change in geographic position; and

means for determining a position of the person in a GPS-denied environment based on the signal including data representing the relative change in geographic position.

20. The positioning device of claim 19, wherein the positioning device is disposed within an insole of the article of footwear, and wherein the piezoelectric power source is configured to accumulate an electrical charge in response to a mechanical force to be applied to the positioning device via the article of footwear.