Heading calibration method and compass sensor using the same
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United States of America Patent
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Aug 8, 2017
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app pub date -
Jan 16, 2014
filing date -
Jul 29, 2013
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Abstract
A heading calibration method, adapted for a compass sensor is provided. The heading calibration method includes the following steps. R data segments are sequentially generated by rotating the compass sensor by a predetermined angle, wherein the data segments includes a plurality of magnetic data respectively. A partial calibration process is executed to calibrate a reference point coordinate according to the magnetic data in rth data segment and a initial value of the reference point coordinate, wherein r is between 1 and the R. Parts of the magnetic data in the rth data segment is extracted as whole data, and a whole calibration process is executed according to the whole data to update an initial value of the reference point coordinate. The partial calibration process is executed according to the updated initial value of the reference point coordinate and the magnetic data in a (r+1)th data segment.
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