G - Physics – 01 – C
Patent
G - Physics
01
C
33/1
G01C 25/00 (2006.01) G01C 17/38 (2006.01)
Patent
CA 2009171
METHOD AND APPARATUS FOR AUTOMATIC FLUX-GATE COMPASS CALIBRATION ABSTRACT OF THE DISCLOSURE A system for automatically compensating for changes in permanent magnetism in a vehicle in which a flux-gate compass is installed. Calibration is initial- ly performed by rotating the vehicle through a full circle and determining from the flux-gate outputs the degree of distortion suffered by an ideally circular performance characteristic. Subsequent flux-gate read- ings are compensated in accordance with parameters generated during calibration. Parameters relating to offset or displacement of the characteristic are auto- matically and continually updated to compensate for changes in permanent magnetism of the vehicle, such as might be caused by loading or unloading the vehicle.
Fetherstonhaugh & Co.
Magnavox Government And Industrial Electronics Company
Wanous Richard E.
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