Method for stabilizing the directional display of magnetic compa

Details Method for stabilizing the directional display of magnetic compa Method for stabilizing the directional display of magnetic compa

1995-11-06

1997-12-23

Ramirez, Ellis B.

Boots, shoes, and leggings

364559, 33349, 33359, G01C 1738

Patent

active

057012598

ABSTRACT:
A method is specified for stabilizing the directional display of magnetic compasses on bodies moving in a magnetic field, in particular the terrestrial magnetic field, against magnetic interference sources. The spatial components of the magnetic field vector are measured at a measuring point within a first interference-free measurement region. Taking account of the temporal changes in the measured components, the absolute value of the magnetic field strength and, as a function thereof, a quality function are determined, which quality function is a measure of the temporal distribution of the measured magnetic field vector components and a measure of the quality of the value of the magnetic field strength. For a further measuring point, the quality function and the measured component values are used to estimate the magnetic field vector at this measuring point and to measure the spatial components of this magnetic field vector. A further quality function is determined from the measurements which is combined with the first quality function to form a weighting function with which the components of the new magnetic field vector are weighted in such a way that a stabilized magnetic field vector having stabilized components is obtained. This method can be continued by iteration.

REFERENCES:
patent: 5117375 (1992-05-01), Worcester et al.
patent: 5191528 (1993-03-01), Yardley et al.
patent: 5247278 (1993-09-01), Pant et al.
patent: 5297063 (1994-03-01), Cage

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