Position-measuring device and method for operating the same

US9303972B2 · kind B2 · utility

Assignee

• DR. JOHANNES HEIDENHAIN GMBH · DE

Inventors

• Johann Oberhauser · Vachendorf, DE
• Bernhard Schmied · Tittmoning, DE
• Jannik Jens Rosenlehner-Emde · Obing, DE
• Werner Schwaiger · Ruhpolding, DE
• Thomas Schweizer · Ebersberg, DE
• Hubert Mayer · Trostberg, DE
• Marc Oliver Tiemann · Salzburg, AT

Key dates

• Filing date: Sep 17, 2013
• Grant date: Apr 5, 2016
• Expiry date: Apr 12, 2034

Classification

• Technology area (CPC G): Physics
• CPC primary: G06F2201/00
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A position-measuring device includes a code carrier having a first graduation track and a second graduation track, the second graduation track being an incremental graduation track. A first detector system is configured to scan the graduation tracks so as to generate first position signals. A second detector system is configured to scan the second graduation track so as to generate second position signals. A first position-processing unit is configured to process the first position signals so as to yield a first absolute position value. A second position-processing unit is configured to process the second position signals so as to yield a second absolute position value. The first position-processing unit is configured to feed an absolute auxiliary position value to the second position-processing unit. The second position-processing unit is initializable with the absolute auxiliary position value.