Multiple Axis, Fiber Optic Interferometric Seismic Sensor
Abstract
A mechanical vibration transducer includes a seismic
mass is supported by a plurality of cylindrical silicone
rubber mandrels. Each mandrel is wound with a length
of optical fiber which has a reflective end and a transmissive
end. A case surrounds the assemblage and is
connected to the supports. When the case is displaced,
the supports change diameter in response to the relative
motion between the seismic mass and the case. This
change in diameter is translated to a change in length of
the optical fiber. By using the fibers as arms of a michelson
interferometer, a sensitive instrument responsive to
displacing vibrations is obtained. This instrument is
energized entirely by light transmitted through optical
fiber waveguides and whose information is transmitted
to the observor using only light. waves in optical fibers.
Description
Patent
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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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