Survey apparatus and method employing rate-of-turn and free gyro

Details Survey apparatus and method employing rate-of-turn and free gyro Survey apparatus and method employing rate-of-turn and free gyro

1978-07-17

1980-03-11

Stephan, Steven L.

Geometrical instruments

Indicator of direction of force traversing natural media

Borehole direction or inclination

33323, E21B 47024, G01C 1900

Patent

active

041920775

ABSTRACT:
Survey apparatus and method employs a free gyroscope for fast determination of azimuth, free gyroscope alignment being periodically corrected by a rate gyroscope which is periodically rotated for accurate azimuth determination. An accelerometer is also usable in conjunction with the gyroscopes for tilt determination.

REFERENCES:
patent: 2309905 (1943-02-01), Irwin et al.
patent: 3753296 (1973-08-01), Van Steenwyk

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