Comparator for step data gyro compasses

Details Comparator for step data gyro compasses Comparator for step data gyro compasses

G - Physics

06

F

343/1, 79/4

G06F 7/00 (2006.01) G01C 17/38 (2006.01) G01C 19/38 (2006.01) G01C 25/00 (2006.01) H03K 5/26 (2006.01)

Patent

CA 1040291

ABSTRACT OF THE DISCLOSURE Apparatus for monitoring the operation of pairs of step data compasses, each being of the type which produces a number of phase-displaced pulses dependent upon the rotation of the compass. The apparatus includes circuits to form separate trains of UP or DOWN pulses in response to direction and magnitude of rotation of each compass. Each category of UP and DOWN pulses is stored in a separate pulse storage circuit and then sequentially clocked into an up-down difference counter. When the net change in the difference counter exceeds predetermined upper or lower limits, a corresponding pulse is applied to a difference accumulator. An alarm is actuated when the count stored in the difference accumulator reaches a value equal to that of an adjustable digital alarm set.

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