Method and apparatus for compensating a magnetic compass

Details Method and apparatus for compensating a magnetic compass Method and apparatus for compensating a magnetic compass

1990-10-15

1992-07-21

Haroian, Harry N.

Geometrical instruments

Indicator of direction of force traversing natural media

Magnetic field responsive

33363K, G01C 1726

Patent

active

051311542

ABSTRACT:
Method and apparatus are disclosed for compensating a magnetic compass in a vehicle for magnetic deviation. With the compass installed, the angle indicated by the magnetic compass relative to a direction axis of the vehicle is measured. A test magnetic field is added at a known angle relative to the direction axis of the vehicle. The strength of the test magnetic field required to displace the direction indicated by the compass through a predetermined angle is memorized. Then, the strength of the resultant magnetic field is calculated using the measured angle, the predetermined angle and the memorized strength of the magnetic field. After determining the strength of the resultant magnetic field with the vehicle oriented in any selected direction, the vehicle is then reoriented in a direction one hundred eighty degrees away from the selected direction and the strength of the resultant magnetic field in that orientation is determined in the same way. The value of the deviating magnetic field is calculated as one-half the vector sum of the two resultant magnetic fields.

REFERENCES:
patent: 4720992 (1988-01-01), Hormel
patent: 4733179 (1988-03-01), Bauer et al.
patent: 4862594 (1989-09-01), Schierbeek et al.
patent: 4866627 (1989-09-01), Suyama
patent: 4937945 (1990-07-01), Schofield et al.

Affiliated with

Also associated with

Rating

Method and apparatus for compensating a magnetic compass does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for compensating a magnetic compass, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for compensating a magnetic compass will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-835575