Apparatus and method for detecting mass eccentricity
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Jul 11, 2000
Grant Date -
N/A
app pub date -
May 22, 1998
filing date -
Jul 17, 1997
priority date (Note) -
Expired
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Abstract
A spherical object is positioned on a rotation stage, the rotation stage is rotated, and a deviation detector detects whether the spherical object deviates from the rotation stage or not. A rotation frequency of the rotation stage when the object deviates from the rotation stage is detected by a rotation frequency detector, and a judgement system judges whether the object is mass eccentric or not, comparing the detected rotation frequency with a predetermined rotation frequency which is set beforehand.
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