Method and system for determining object motion by capturing motion data via radio frequency phase and direction of arrival detection

• US 9,497,597 B2
• Filed: 12/21/2015
• Issued: 11/15/2016
• Est. Priority Date: 10/20/2013
• Status: Active Grant

• Current Assignee: OAHU Group LLC
• Original Assignee: OAHU Group LLC
• Inventors: Nakata, Robert Haruo, Mostafanezhad, Isar, Nakata, Robert Jeffrey
• Primary Examiner(s): FILE, ERIN M
• Application Number:
  US14/976,511
• Publication Number:
  US 20160261988A1
• Time in Patent Office: 330 Days
• US Class Current: 1/1
• CPC Class Codes: A61B 5/1114 Tracking parts of the body
• CPC Class Codes: A61B 5/1121 Determining geometric values, e.g. centre of rotation or angular range of movement
• CPC Class Codes: G06F 3/011 Arrangements for interaction with the human body, e.g. for user immersion in virtual reality blind teaching G09B21/00
• CPC Class Codes: H04B 1/385 Transceivers carried on the body, e.g. in helmets
• CPC Class Codes: H04W 4/026 using orientation information, e.g. compass
• CPC Class Codes: H04W 4/027 using movement velocity, acceleration information

Abstract

Methods and systems for determining the motion of an object by capturing motion data. The methods and systems may comprise the use of motion sensor tags adapted for disposal on an object, wherein motion data may be collected by said motion sensor tags and transmitted via radio frequency signal for processing of collected data comprising the motion data, direction of arrival data, amplitude data, and phase data. The same system may also be adapted to determine the position of a UAV or aircraft by intercepting radio frequency communications signals emanating from the object.

Claims

1. A system comprising:

a plurality of motion sensor tags adapted to collect motion data from an object;

at least one radio frequency transmitter adapted to transmit the motion data via a radio frequency signal;

at least one phased antenna array adapted to receive the motion data from the radio frequency signal, and derive direction of arrival data, amplitude data, and phase data via receipt of the radio frequency signal; and

at least one signal processor adapted to provide three-dimensional data comprising a position, an orientation, an acceleration, and/or a velocity of the object in a three-dimensional space by processing a collected data set comprising the motion data, the direction of arrival data, the amplitude data, and the phase data.

2. The system according to claim 1, wherein the object comprises a human.

3. The system according to claim 1, wherein the object comprises two or more segments, and wherein each motion sensor tag is adapted for independent attachment to at least two of the segments.

4. The system according to claim 3, wherein the two or more segments comprise body segments of an animal.

5. The system according to claim 4, wherein the body segments are selected from at least one of upper arms, lower arms, upper legs, lower legs, elbows, or knees.

6. The system according to claim 1, wherein each motion sensor tag comprises an inertial measurement unit.

7. The system according to claim 6, wherein the motion data comprises yaw data, pitch data, and/or roll data.

8. The system according to claim 6, wherein each motion sensor tag comprises at least one radio frequency transmitter for transmitting the motion data.

9. The system according to claim 8, wherein each motion sensor tag comprises a microprocessor.

10. The system according to claim 9, wherein the microprocessor is adapted to format the motion data.

11. The system according to claim 10, wherein the microprocessor is adapted to generate a baseband waveform of the motion data, and upconvert the motion data to the at least one radio frequency transmitter.

12. The system according to claim 11, wherein each motion sensor tag comprises at least one battery.

13. The system according to claim 1, wherein the at least one antenna array comprises a planar phased array.

14. The system according to claim 1, wherein the at least one antenna array is connected to a receiver.

15. The system according to claim 1, further comprising a digital signal processor contained in a main processor unit.

16. The system according to claim 15, wherein the main processor unit further comprises a wireless connection.

17. The system according to claim 16, wherein the wireless connection comprises WiFi.

18. The system according to claim 16, wherein the main processor unit is adapted to transmit the three-dimensional data via the wireless connection to a remote computing device.

19. The system according to claim 18, wherein the remote computing device is adapted to display the three-dimensional data.

20. The system according to claim 18, wherein the remote computing device comprises a virtual reality headset or virtual reality goggles.

21. The system according to claim 18, wherein the remote computing device is in communication with a virtual reality headset or virtual reality goggles.

22. The system according to claim 1, wherein the collected data set further comprises predetermined constraint data.

23. The system according to claim 1, wherein the antenna array comprises a planar switched antenna array.

24. The system according to claim 1, further comprising a Kalman filter.