INNER-WALL MEASURING INSTRUMENT AND OFFSET-AMOUNT CALCULATION METHOD
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United States of America Patent
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Issued Date -
Aug 31, 2017
app pub date -
Feb 22, 2017
filing date -
Feb 22, 2017
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Abstract
An inner-wall measuring instrument includes: a placement surface on which an object to be measured is placed; a base relatively movable with respect to the placement surface in three axis directions orthogonal to one another; a touch probe that is disposed at a first position of the base and brought into contact with the object; an image probe that is disposed at a second position of the base and capable of imaging the object with a direction parallel to the placement surface being an imaging direction; a rotational drive unit that rotates the image probe around an axis extending in a direction perpendicular to the placement surface; a linear drive unit that moves the image probe in the imaging direction; and a calculator that calculates an offset amount between the touch probe disposed at the first position and the image probe disposed at the second position.
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