Geometrical instruments – Indicator of direction of force traversing natural media – Magnetic field responsive
Patent
1990-06-05
1992-12-15
Haroian, Harry N.
Geometrical instruments
Indicator of direction of force traversing natural media
Magnetic field responsive
33361, G01C 1738
Patent
active
051705664
ABSTRACT:
An improved fluxgate instrument for measuring heading as well and pitch and roll angles is disclosed. A plurality of fluxgate sensors are continuously energized with a DC feedback signal derived from the reading of each sensor so as to minimize magnetic cross-coupling between the sensors. In addition while two sensors are gimbally mounted to sense the horizontal components of the earth's magnetic field, the vertical field is sensed by two sensors strapped down relative to the instrument casing for sensing the earth's vertical magnetic field in order to compensate for latitude. Finally, sine and cosine coils surround the gimbally mounted sensors and generate AC fields which are sensed by the gimbally mounted sensors and are used to calculate the pitch and roll angles.
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Fowler J. Thomas
Selecman George E.
Arthur D. Little Inc.
Haroian Harry N.
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