Flight instrument using light interference for acceleration sens

Details Flight instrument using light interference for acceleration sens Flight instrument using light interference for acceleration sens

1986-06-25

1987-08-18

Chapman, John

Measuring and testing

Speed, velocity, or acceleration

Acceleration determination utilizing inertial element

356345, G01P 1513

Patent

active

046868585

ABSTRACT:
Aircraft instrument for indicating accelerations of the aircraft movement based on the use of an optical laser interferometer. A mass is connected to one of several mirrors in the interferometer which causes the interference pattern to move up or down in response to the change in acceleration. The interferometer uses a laser beam projected onto on optical detector that senses the motion of the interference pattern and produces a corresponding electrical signal which is connected to a linear motor which in turn is linked to the same mirror but in a negative feed-back arrangement that seeks to restore the position of the interference pattern. The amplifier output is an electrical analog of the acceleration.

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