Methods, devices and systems for determining the zero rate output of a sensor

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United States of America Patent

PATENT NO 10859597
APP PUB NO 20140222361A1
SERIAL NO

14176464

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Abstract

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A bias value associated with a sensor, e.g., a time-varying, non-zero value which is output from a sensor when it is motionless, is estimated using a ZRO-tracking filter which is a combination of a moving-average filter and a Kalman filter having at least one constraint enforced against at least one operating parameter of the Kalman filter. It achieves faster convergence on an estimated bias value and produces less estimate error after convergence. A resultant bias estimate may then be used to compensate the biased output of the sensor in, e.g., a 3D pointing device.

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Patent Owner(s)

  • IDHL HOLDINGS, INC.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Cook, Bryan A Silver Spring, US 25 46
Liberty, Matthew G Gaithersburg, US 41 3462
Sheng, Hua Gaithersburg, US 15 148

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