Fibre optic cable for acoustic/seismic sensing
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United States of America Patent
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Nov 14, 2017
Grant Date -
Dec 10, 2015
app pub date -
Oct 25, 2013
filing date -
Oct 26, 2012
priority date (Note) -
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Abstract
Fiber optic cable structures suitable for distributed acoustic sensing that are capable of discriminating between stimuli acting on the cable in different directions, the cable structure including a core structure (202, 203, 204) with an optical fiber wound around the periphery of the core structure, the core further including a mass (203) which is movable in a preferred direction within the cable such that movement of said mass in said preferred direction causes a change in length of the fiber wound around the periphery of the core.
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