Fiber Optic Accelerometer With Centrally Supported Flexural Disk

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Author
Hofler, Thomas J.
Drown, David A.
Garrett, Steven L.
Date
1994-11-29Metadata
Show full item recordAbstract
An accelerometer or seismometer has an elastic disk
bearing a mass distributed peripherally around the disk.
The disk is supported for flexure and for isolation from
mounting strain by a stob centrally through the disk.
The accelerometer or seismometer has a pair of flat
spirals of optical fiber, each spiral being fixedly attached
to a corresponding disk side so that disk flexure lengthens
a spiral on one disk side and shortens a spiral on an
oppositely facing disk side and so that temperature differences
between the spirals are minimized. The pair of
spirals are connected as legs of a fiber optic interferometer
so that the interferometer provides an output corresponding
to the flexure. Several of the disks and asociated
pairs of spirals may be coaxially mounted to
provide increased sensitivity.
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This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.Collections
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