Method for the dimensional measurement of workpieces
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United States of America Patent
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Sep 5, 1995
Grant Date -
N/A
app pub date -
Jan 14, 1994
filing date -
Jan 14, 1993
priority date (Note) -
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Abstract
A method for compensating sliding temperature influences on workpieces during a dimensional measurement process. For this purpose, the workpiece temperature and the relative position of the workpiece in relation to the measuring apparatus are recorded at the start and at the end of the actual measurement. By use of the recorded values, the temperature of the workpiece can be calculated at each instant of the dimensional measurement and the relative position of the workpiece in relation to the measuring apparatus and therefore the corrected scanning point can thus be determined. Thus, in the dimensional measurement of workpieces, while taking into account the temperature influences, the temperature straight line in the time interval from the start of measurement to the end of measurement is divided by intermediate measurements into part intervals, within which interpolation can be carried out. For a further improvement of these values, the instants of coordinate measurement are made to coincide with the instants of temperature measurement.
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