Electronic flux gate compass calibration technique

Details Electronic flux gate compass calibration technique Electronic flux gate compass calibration technique

1990-10-29

1992-11-24

Raevis, Robert

Measuring and testing

Instrument proving or calibrating

Volume of flow, speed of flow, volume rate of flow, or mass...

33356, G01C 2500

Patent

active

051652692

ABSTRACT:
An electronic flux gate compass calibration method and apparatus. An electronic flux gate compass mounted on a terrestrial vehicle is first rotated 360 degrees by driving the vehicle in a circle to determine four reference points where the locus of points representing the orthogonal outputs of the compass crosses over the X and Y axes of a reference Cartesian coordinate system. These four reference points are employed to calibrate the orthogonal outputs of the compass and compute a calibrated compass heading. Thereafter, as the vehicle moves from place to place, the output of the compass is monitored. If the output is within a predetermined region around one of the reference points, the reference point is modified to be closer to that output point. When the vehicle has moved through a closed loop, i.e., rotated a net 360 degrees, the compass is recalibrated.

REFERENCES:
patent: 4660161 (1987-04-01), Okada
patent: 4672565 (1987-06-01), Kuno et al.
patent: 4866627 (1989-09-01), Suyama
patent: 5046031 (1991-09-01), Wanous

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