METHODS AND SYSTEMS FOR COMBINING SENSOR DATA TO MEASURE VEHICLE MOVEMENT

• US 20170138737A1
• Filed: 11/16/2016
• Published: 05/18/2017
• Est. Priority Date: 11/17/2015
• Status: Active Grant

• Current Assignee: Cambridge Mobile Telematics, Inc.
• Original Assignee: Truemotion, Inc.
• Inventors: Cordova, Brad, Sahoo, Sanujit, Arcolano, Nicholas, Emhoff, John
• Granted Patent: US 10,054,446 B2
• Time in Patent Office: Days
• CPC Class Codes: G01C 21/1654 with electromagnetic compass
• CPC Class Codes: G01C 21/18 Stabilised platforms, e.g. by gyroscope
• CPC Class Codes: G01C 21/30 Map- or contour-matching
• CPC Class Codes: H04W 4/026 using orientation information, e.g. compass
• CPC Class Codes: H04W 4/027 using movement velocity, acceleration information
• CPC Class Codes: H04W 4/029 Location-based management or tracking services
• CPC Class Codes: H04W 4/40 for vehicles, e.g. vehicle-to-pedestrians [V2P]

Abstract

Embodiments of the present invention provide systems and methods for combining sensor data to measure vehicle movement. Embodiments may collect vehicle and driving data using sensors of a mobile device of a user, such as a location determination sensor and a movement determination sensor. In some embodiments, the data from the sensors may be combined to more accurately estimate vehicle movement, such as vehicle acceleration.

Claims

1. A system comprising:

a mobile device including a plurality of sensors, wherein the plurality of sensors include a location determination sensor and a movement determination sensor;

a memory; and

a processor coupled to the memory, wherein the processor is configured to perform operations including;

obtaining a plurality of location measurements from the location determination sensor during a trip in a vehicle;

obtaining a plurality of movement measurements from the movement determination sensor during the trip in the vehicle, wherein each of the plurality of location measurements is associated with a movement measurement of the plurality of movement measurements;

identifying a turn in the vehicle using at least one of the plurality of location measurements or the plurality of movement measurements;

determining a subset of the plurality of movement measurements that correspond to the turn in the vehicle;

identifying a plurality of remaining movement measurements by removing the subset from the plurality of movement measurements; and

determining an acceleration measurement for the vehicle using the plurality of remaining movement measurements.

2. The system of claim 1, wherein identifying the turn in the vehicle comprises:

identifying a road map corresponding to the plurality of location measurements;

correlating the plurality of location measurements to the road map to identify the turn, wherein the turn corresponds to a subset of the plurality of location measurements.

3. The system of claim 2, wherein determining the subset of the plurality of movement measurements that correspond to the turn in the vehicle comprises:

correlating the subset of the plurality of location measurements to the subset of the plurality of movement measurements.

4. The system of claim 1, wherein the plurality of movement measurements include a plurality of yaw measurements.

5. The system of claim 4, wherein identifying the turn in the vehicle comprises:

determining that at least one of the plurality of yaw measurements exceeds a threshold.

6. The system of claim 1, wherein the location determination sensor includes a Global Positioning System (GPS) device.

7. The system of claim 1, wherein the movement determination sensor includes at least one of an accelerometer or a gyroscope.

8. The system of claim 1, wherein identifying the turn in the vehicle uses the plurality of location measurements and the plurality of movement measurements.

9. The system of claim 1, further comprising, after obtaining the plurality of movement measurements from the movement determination sensor:

determining at least one orientation of the mobile device in the vehicle using the plurality of movement measurements.

10. The system of claim 9, further comprising:

revising the plurality of movement measurements using the at least one orientation of the mobile device in the vehicle.

11. A method comprising:

obtaining a plurality of location measurements from a location determination sensor of a mobile device during a trip in a vehicle;

obtaining a plurality of movement measurements from a movement determination sensor of the mobile device during the trip in the vehicle, wherein each of the plurality of location measurements is associated with a movement measurement of the plurality of movement measurements;

identifying a turn in the vehicle using at least one of the plurality of location measurements or the plurality of movement measurements;

determining a subset of the plurality of movement measurements that correspond to the turn in the vehicle;

identifying a plurality of remaining movement measurements by removing the subset from the plurality of movement measurements; and

determining an acceleration measurement for the vehicle using the plurality of remaining movement measurements.

12. The method of claim 11, wherein identifying the turn in the vehicle comprises:

identifying a road map corresponding to the plurality of location measurements;

correlating the plurality of location measurements to the road map to identify the turn, wherein the turn corresponds to a subset of the plurality of location measurements.

13. The method of claim 12, wherein determining the subset of the plurality of movement measurements that correspond to the turn in the vehicle comprises:

correlating the subset of the plurality of location measurements to the subset of the plurality of movement measurements.

14. The method of claim 11, wherein the plurality of movement measurements include a plurality of yaw measurements.

15. The method of claim 14, wherein identifying the turn in the vehicle comprises:

determining that at least one of the plurality of yaw measurements exceeds a threshold.

16. The method of claim 11, wherein the location determination sensor includes a Global Positioning System (GPS) device.

17. The method of claim 11, wherein the movement determination sensor includes at least one of an accelerometer or a gyroscope.

18. The method of claim 11, wherein identifying the turn in the vehicle uses the plurality of location measurements and the plurality of movement measurements.

19. The method of claim 11, further comprising, after obtaining the plurality of movement measurements from the movement determination sensor:

determining at least one orientation of the mobile device in the vehicle using the plurality of movement measurements.

20. The method of claim 19, further comprising:

revising the plurality of movement measurements using the at least one orientation of the mobile device in the vehicle.