Method, apparatus, and medium for calibrating compass sensor...

Details Method, apparatus, and medium for calibrating compass sensor... Method, apparatus, and medium for calibrating compass sensor...

2007-08-23

2009-11-03

Raymond, Edward (Department: 2857)

Data processing: measuring, calibrating, or testing

Calibration or correction system

Direction

C033S356000

Reexamination Certificate

active

07613581

ABSTRACT:
A method of calibrating a compass sensor in consideration of a magnetic environment is provided. The method includes (a) acquiring magnetic force data by rotating a compass sensor 360 degrees, the compass sensor including a biaxial magnetometer, (b) fitting the acquired magnetic force data to an ellipse function, (c) transforming the acquired magnetic force data and the ellipse function into a circle which is centered on an origin, and (d) calculating a distortion factor based on an inclination of a major axis of the ellipse function or the acquired magnetic force data to a horizontal axis, the distortion factor indicating the degree to which a magnetic field is distorted.

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