Strain measurement apparatus, linear expansion coefficient measurement method, and correction coefficient measurement method for temperature distribution detector
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United States of America Patent
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Aug 9, 2016
Grant Date -
May 2, 2013
app pub date -
Oct 23, 2012
filing date -
Oct 26, 2011
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Abstract
A strain measurement apparatus includes: a stereo camera device that produces a first stereo image and a second stereo image of a measurement object; an actual strain calculation portion configured to find a three-dimensional configuration of the measurement object from the first stereo image and the second stereo image to find actual strain of the measurement object; a temperature distribution detector that detects a temperature distribution of the measurement object; a free thermal strain calculation portion configured to find free thermal strain of the measurement object from the temperature distribution detected by the temperature distribution detector; and a constraint strain calculation portion configured to find as constraint strain of the measurement object a difference obtained by subtracting the free thermal strain found by the free thermal strain calculation portion from the actual strain found by the actual strain calculation portion.
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