Methods and systems for orienting a mobile device to a vehicle's reference frame
AssigneeTruemotion, Inc.
InventorsBrad Cordova, Sanujit Sahoo, Sushrut Karnik
Life of this patent
Estimating the term…
Abstract
A method of orienting a mobile device to a vehicle includes determining an orientation of a gravity vector and aligning a first axis of the mobile device with respect to the gravity vector. The method also includes determining an orientation of a magnetic direction and aligning a second axis of the mobile device with respect to the magnetic direction. The method further includes determining a direction of travel for the vehicle and orienting the mobile device to the vehicle.
Claims19
A method of orienting a mobile device to a vehicle, the method comprising:
- determining an orientation of a gravity vector;
- aligning a first axis of the mobile device with respect to the gravity vector;
- determining an orientation of a magnetic direction;
- aligning a second axis of the mobile device with respect to the magnetic direction;
- determining a direction of travel for the vehicle;
- and
- orienting the mobile device to the vehicle.
A method of providing a quaternion for reference frame transformation, the method comprising:
- (a) initiating a driving event in a vehicle having a reference frame;
- (b) receiving mobile device data associated with a time stamp;
- (c) computing a quaternion operable to transform the mobile device data to the vehicle reference frame;
- (d) determining if the driving event is complete;
- incrementing the time stamp and iterating steps (a), (b), (c), and (d) if the driving event is not complete;
- providing the quaternion for reference frame transformation if the driving event is complete.
A method of identifying use of a mobile device by a driver of a vehicle during a driving event, the method comprising:
- obtaining motion data from the mobile device during the driving event;
- orienting the obtained motion data to a reference frame of the vehicle;
- determining that the mobile device has moved to the left with respect to the vehicle;
- determining that a front screen of the mobile device faces to the left with respect to the vehicle;
- and
- identifying use of the mobile device by the driver during the driving event.
Dependencies are inferred from the claim text.