Method for the dimensional measurement of workpieces

Details Method for the dimensional measurement of workpieces Method for the dimensional measurement of workpieces

1994-01-14

1995-09-05

Fulton, Christopher W.

Geometrical instruments

Distance measuring

Error compensation

33503, 33DIG19, G01D 3028

Patent

active

054469716

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.

REFERENCES:
patent: 4895454 (1990-01-01), Kammleiter et al.
patent: 4949469 (1990-08-01), Wachtler
patent: 4997287 (1991-03-01), Tittl
patent: 5031331 (1991-07-01), Herzog et al.
patent: 5195826 (1993-03-01), Enderle et al.
A. Weckenmann, "Coordinate Measurement Technique in Page Make-Up", Technical Measurement tm, vol. 57, No. 3, 1990, pp. 95-102. (No Translation Provided).

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