Fiber optic twist ring accelerometer

Details Fiber optic twist ring accelerometer Fiber optic twist ring accelerometer

1997-06-09

1999-03-16

Oda, Christine K.

Measuring and testing

Speed, velocity, or acceleration

Acceleration determination utilizing inertial element

7351401, 7351438, G01P 1508

Patent

active

058833080

ABSTRACT:
A fiber optic accelerometer includes a ring that is twistably-responsive to an orthogonally-directed acceleration force. The ring is mounted by means of either an inner or an outer peripheral flange comprising an annular washer to one of two concentric walls of a disk-like casing. The walls apportion the interior of the casing into a disk-like central section and a surrounding annular section. The ring is appropriately flange-mounted and proportioned to present a moment of inertial that subjects the ring to twisting in the presence of acceleration along the sensitive input axis. Flat spiral coils of optical fiber are fixed to the top and bottom of the ring. Each coil forms a portion of the leg of an interferometer for generating a signal responsive to the acceleration input.

REFERENCES:
patent: 4932258 (1990-06-01), Norling
patent: 4959539 (1990-09-01), Hofler
patent: 5287332 (1994-02-01), Lea
patent: 5317929 (1994-06-01), Brown

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