PROCESSES FOR MORE ACCURATELY CALIBRATING AND OPERATING E-COMPASS FOR TILT ERROR, CIRCUITS, AND SYSTEMS
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United States of America Patent
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May 14, 2015
filing date -
Mar 6, 2008
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Abandoned
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Abstract
An electronic circuit includes an electronic compass having e-compass sensors mounted on different axes and operable to supply e-compass sensor data, memory circuitry, and an electronic processor coupled to said e-compass sensors and to said memory circuitry, said electronic processor operable to execute an electronic ellipse-fitting procedure responsive to the e-compass sensor data to generate at least one signal related to an ellipse tilt angle (ξ), and store the at least one signal in said memory circuitry as a tilt calibration parameter for the e-compass. Processes for calibrating an e-compass, as well as electronic circuits and processes for correcting measured heading, and processes of manufacture are also disclosed.
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