Inertial sensor fusion orientation correction

A system for determining and correcting a calculated orientation of a computing device based on data from an accelerometer and a gyroscope. The system compares a predicted direction of gravity in a predicted frame of the device with a measured direction of gravity in a sensor frame of the device, an...

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Bibliographic Details
Main Authors SOHN JUNG BAE, DEVRIES DAVID WILLIAM
Format Patent
LanguageEnglish
Published 30.06.2015
Subjects
AMUSEMENTS
CALCULATING
CARD, BOARD, OR ROULETTE GAMES
COMPUTING
COUNTING
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRIC DIGITAL DATA PROCESSING
ELECTRICITY
GAMES
GAMES NOT OTHERWISE PROVIDED FOR
GYROSCOPIC INSTRUMENTS
HUMAN NECESSITIES
INDOOR GAMES USING SMALL MOVING PLAYING BODIES
MEASURING
MEASURING DISTANCES, LEVELS OR BEARINGS
NAVIGATION
PHOTOGRAMMETRY OR VIDEOGRAMMETRY
PHYSICS
SPORTS
SURVEYING
TESTING
VIDEO GAMES
WIRELESS COMMUNICATIONS NETWORKS
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Summary:A system for determining and correcting a calculated orientation of a computing device based on data from an accelerometer and a gyroscope. The system compares a predicted direction of gravity in a predicted frame of the device with a measured direction of gravity in a sensor frame of the device, and determines an angle of the difference between the directions. A correction is calculated to rotate the predicted frame around an axis by the angle relative to a sensor frame, the axis being perpendicular to both the predicted and measured directions of gravity. A predicted orientation of a reference "Earth" frame relative to the predicted frame is calculated based on the gyroscope data. A corrected orientation is determined by applying the correction to the predicted orientation, providing an orientation of the Earth reference frame relative to the sensor frame.
Bibliography:Application Number: US201414497512