High speed well surveying and land navigation

Details High speed well surveying and land navigation High speed well surveying and land navigation

1987-06-11

1989-05-30

Martin, Jr., William D.

Geometrical instruments

Indicator of direction of force traversing natural media

Process

33304, 33324, G01C 1938

Patent

active

048337870

ABSTRACT:
A land vehicle navigation apparatus incorporates an inertial angular rate sensor on the vehicle and having a sensitive axis, and an inertial acceleration or tilt sensor having at least two sensitive axes; the latter two sensitive axes are typically located at the vehicle in a plane parallel to the Earth's surface; and a rotary drive is operatively connected to the sensors to rotate them about an axis extending generally at the vehicle in a plane parallel to the Earth's surface; and, circuitry is operatively connected with the sensors to determine three vehicle orientation angles, roll, pitch, and azimuth, with respect to an Earth-fixed coordinate set at a first location, and also to determine the three vehicle orientation angles as the land vehicle travels over the Earth surface; and changes to the azimuth angle during travel are determined by integration of the output of the rate sensor; also, the sensor, drive and circuitry are typically carried by the vehicle.

REFERENCES:
patent: 3058242 (1962-10-01), Ocnaschek
patent: 3151235 (1964-09-01), Geenshields
patent: 4559713 (1985-12-01), Ott et al.

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