Geometrical instruments – Miscellaneous – Light direction
Patent
1992-10-06
1994-08-02
Fulton, Christopher W.
Geometrical instruments
Miscellaneous
Light direction
33503, G01B 703
Patent
active
053333861
ABSTRACT:
A computer-operated coordinate-measurement machine has two length-measurement systems arranged in parallel for measuring the longitudinal displacement of a probe carried by the portal (3-5) of the machine, and these two length-measurement systems (13, 14) may belong to different precision classes. A computer-associated device (16) forms an absolute position-measurement value (Ym) from length-measurement signals of the more precise measurement system (13) and said device forms a dynamic measurement or instantaneous deviation value (Ys-Ym) from the difference between length-measurement signals of the respective systems (13, 14). The computer of the machine calculates the effective instantaneous position (Ym+.DELTA.y) of the probe (9a, b, c) borne by the portal (3-5), using the instantaneous value of the transverse position of the probe on the portal, in conjunction with the absolute measurement value (Ym) and the dynamic measurement value (Ys-Ym).
REFERENCES:
patent: 4523380 (1985-06-01), Wright
patent: 4597182 (1986-07-01), Rinn
patent: 4882848 (1989-11-01), Breyer et al.
patent: 4908951 (1990-03-01), Gurny
patent: 5189805 (1993-03-01), Matsumoto et al.
Aubele Eugen
Breyer Karl-Hermann
Ebersbach Peter
Grupp Gunter
Wiedmann Wolfgang
Carl-Zeiss-Stiftung Heidenheim/Brenz
Fulton Christopher W.
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