Electronic magnetic compass

Details Electronic magnetic compass Electronic magnetic compass

1990-12-13

1992-03-17

Haroian, Harry N.

Geometrical instruments

Indicator of direction of force traversing natural media

Magnetic field responsive

33361, 33363K, G01C 1730

Patent

active

050956302

ABSTRACT:
Disclosed is an electronic magnetic compass which is to be mounted on a small ship and which is reduced in cost and improved in performance. The electronic magnetic compass is provided with an angle sensor interlocked with a compass card so as to produce a code signal at every predetermined angle, a code converter for converting the code signal into a compass indication angle, and a signal conversion circuit for producing a deviation signal indicating a deviation between an azimuth angle signal and an indication angle signal. The compass azimuth measurement is performed with a simple configuration of an open loop system, so that the structure of an encoder for the angle sensor is so simple that the cost can be reduced so much. The azimuth angle signal and the indication angle signal can be automatically calibrated so that the measurement accuracy can be improved.

REFERENCES:
patent: 4418480 (1983-12-01), Garner
patent: 4862398 (1989-08-01), Shimizu et al.

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