Method of compensating tilt using two-axis geomagnetic...

Details Method of compensating tilt using two-axis geomagnetic... Method of compensating tilt using two-axis geomagnetic...

2007-12-04

2007-12-04

Barlow, John (Department: 2863)

Data processing: measuring, calibrating, or testing

Calibration or correction system

Direction

C702S051000, C702S151000

Reexamination Certificate

active

11300341

ABSTRACT:
The present general inventive concept relates to a method of compensating tilt using a two-axis geomagnetic sensor and an acceleration sensor and an apparatus. Using the principle where a geomagnetic field value measured in a state where one axis of the two-axis geomagnetic sensor is set up vertically is identical to a Z-axis geomagnetic field value, the Z-axis geomagnetic field value can be evaluated by using two axes of the two-axis geomagnetic sensor. Accordingly, an azimuth angle can be easily calculated, so that the azimuth angle changed by tilt can be compensated. Therefore, there is an effect that a constant azimuth can be always output even though tilt occurs. In addition, when a module of the two-axis geomagnetic sensor and the acceleration sensor is used in a mobile equipment, the two-axis geomagnetic sensor can automatically measure geomagnetic field values of three axes by a simple motion where a user vertically sets up or rotates up and down the mobile equipment. Therefore, there is an effect that a constant azimuth angle can be always output by compensating the azimuth angle changed by tilt.

REFERENCES:
patent: 6813584 (2004-11-01), Zhou et al.
patent: 6957156 (2005-10-01), Jo et al.
patent: 2004-012416 (2004-01-01), None
patent: 2004-286732 (2004-10-01), None
patent: 2004-13439 (2004-02-01), None

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