Compensation system for a magnetic compass

Details Compensation system for a magnetic compass Compensation system for a magnetic compass

1977-04-01

1978-11-07

Gruber, Felix D.

Boots, shoes, and leggings

33356, 364424, G01C 1738

Patent

active

041248970

ABSTRACT:
In a vehicle locating apparatus that utilizes Hall effect generators to determine the magnetic heading of the vehicle there is provided magnetic compensation by the placing of a coil around the Hall generators. A current source generator provides power to the coil of such magnitude so as to create a magnetic field which cancels the spurious local magnetic field components. The system includes a set of manual switches for inputting a rotation angle. A variable time delay circuit incorporates this rotation angle to electronically increase or decrease the measured magnetic heading angle. This electronic rotation provides for a method to correct physical misalignment of the heading sensor in the vehicle and to compensate for local magnetic deviation.

REFERENCES:
patent: 2852859 (1958-09-01), Depp
patent: 3233332 (1966-02-01), Baker et al.
patent: 3253342 (1966-05-01), Depp
patent: 3425648 (1969-02-01), Wipff et al.
patent: 3621584 (1971-11-01), Burt
patent: 3991361 (1976-11-01), Mattern et al.
patent: 4031630 (1977-06-01), Fowler

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