Angular rate and position transducer for borehole survey instrum

Details Angular rate and position transducer for borehole survey instrum Angular rate and position transducer for borehole survey instrum

1982-08-04

1984-07-17

Little, Willis

Geometrical instruments

Indicator of direction of force traversing natural media

Borehole direction or inclination

33302, 33366, 33312, 33363K, 73516LM, E21B 47022

Patent

active

044597592

ABSTRACT:
A transducer for sensing the angular position or rate of change of displacement of a housing of a borehole survey instrument with respect to a reference position includes a rotor magnetically suspended within a stator which is in turn secured to the housing. The rotor is constrained by the magnetic suspension to rotate about a single axis relative to the stator. A frame of reference is established for the transducer, against which subsequent measurements are compared. Optical sensing means are included for sensing the movement of the rotor about the axis of motion to develop an indication of the angular position or rate of change of position of the housing.

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