| 摘要 |
A METHOD AND SYSTEM IS PRESENTED FOR ACQUIRING CALIBRATION DATA FOR A THREE-AXIS ELECTRONIC COMPASS (400) BY POSITIONING AND ROTATING THE COMPASS SO THAT EACH SENSITIVE AXIS (404, 408, 412) IN THE COMPASS EXPERIENCES VARIATION IN THE MAGNETIC FIELD WHILE ROTATING THE COMPASS. ACQUIRING THE CALIBRATION DATA OCCURS BY MEASURING OUTPUT SIGNALS THAT REFLECT THE MAGNETIC FIELDS ACTING ON THE ELECTRONIC COMPASS (400) WHILE ROTATING THE COMPASS. POSITIONING OF THE COMPASS (400) INCLUDES MOVING THE COMPASS SO THAT AT LEAST ONE OF THE SENSITIVE AXES (404, 408, 412) TRAVELS A PATH THAT APPROXIMATELY FORMS A CONE (420) WHEN THE COMPASS IS ROTATED AROUND A GRAVITY VECTOR (416). CALIBRATION DATA FROM THREE SENSITIVE AXES EXPERIENCING VARIATION IN THE MAGNETIC FIELD IS AVAILABLE DURING A SINGLE ROTATION OF THE COMPASS.
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