Method of measuring the effective instantaneous position of a slide-mounted probe element or tool

US5333386A · kind A · utility

Assignee

• Carl-Zeiss-Stiftung, Heidenheim/Brenz · DE

Inventors

• Karl-Hermann Breyer · Heidenheim, DE
• Eugen Aubele
• Gunter Grupp · Böhmenkirch, DE
• Peter Ebersbach · Oberkochen, DE
• Wolfgang Wiedmann · Aalen, DE

Key dates

• Filing date: Oct 6, 1992
• Grant date: Aug 2, 1994
• Expiry date: Oct 6, 2012

Classification

• Technology area (CPC G): Physics
• CPC primary: G05B2219/40293
• WIPO field: Control
• WIPO sector: Instruments

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).