Single point offset calibration for inertial sensors
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United States of America Patent
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Mar 14, 2017
Grant Date -
Jan 9, 2014
app pub date -
Jul 5, 2013
filing date -
Jul 6, 2012
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Abstract
A hand-held processor system for processing data from an integrated MEMS (Micro-Electro-Mechanical-Systems) device disposed within a hand-held computer system and methods therefor. The Single Point Offset Correction (SPOC) process computes offset values to calibrate MEMS sensors using a single set of data measurements at an orientation without dynamic perturbation, and without requiring advance knowledge of orientation of the device. Arbitrary output biases, which are known to be dominant on a single axis, can be corrected to ensure consistent performance. The SPOC process provides a simple method to effectively calibrate a MEMS sensor without requiring extensive system resources. This process can be enhanced by additional estimations of sensor offsets using the set of data measurements or by use of rule-based empirical gain factors.
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