Optical strain gauge
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United States of America Patent
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Dec 11, 2012
Grant Date -
Dec 2, 2010
app pub date -
Feb 19, 2008
filing date -
Feb 19, 2007
priority date (Note) -
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Abstract
An optical strain gage incorporates an optical waveguide or fiber that includes a sensing section with a fiber Bragg grating, which serves for detecting a strain in a strainable member on which the strain gage is mounted. At locations displaced away from the fiber Bragg grating section, on both sides thereof, the optical waveguide is covered by two fastening elements, which secure the optical waveguide in a force-transmitting manner on the strainable member or a bottom support. Between the two fastening elements, a relatively soft elastic fixing material surrounds the optical waveguide and fixes the fiber Bragg grating section on the strainable member or bottom support in a form-fitting and force-isolating manner.
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