Calibration program and electronic compass

Details Calibration program and electronic compass Calibration program and electronic compass

2011-01-04

2011-01-04

Nghiem, Michael P (Department: 2863)

Data processing: measuring, calibrating, or testing

Calibration or correction system

Direction

Reexamination Certificate

active

07865323

ABSTRACT:
The object of the present invention is to provide a calibration program and an electronic compass that make it possible to calibrate the output of a magnetic sensor with a small amount of computation while a user does not notice the execution of calibration. A calibration program according to an aspect of the invention includes: a step of forming at least two triangles21and22with the use of at least four outputs of a magnetic sensor in a three-dimensional space; a step of finding circles23and24circumscribed about the triangle21and22,respectively; and a step of finding the intersection of normal vectors25and26each of which passes through the center of the corresponding circumscribed circle so as to find a reference point.

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Notification of Reasons for Refusal dated Dec. 8, 2009 for Japanese Patent Application No. 2008-514472.

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