Device and method for generating a trigger signal in a position-measuring device and corresponding position-measuring device

US9823646B2 · kind B2 · utility

Assignee

• DR. JOHANNES HEIDENHAIN GMBH · DE

Inventors

• Bernhard Beaury · Teupitz, DE
• Alexander Kobler · Altötting, DE
• Stephan Kreuzer · Traunstein, DE
• Markus Mooshammer · Traunstein, DE
• Michael Walter · Kornwestheim, DE

Key dates

• Filing date: Jun 15, 2015
• Grant date: Nov 21, 2017
• Expiry date: Jun 8, 2036

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04L7/04
• WIPO field: Control
• WIPO sector: Instruments

Abstract

A method generates an asynchronous trigger signal in a position-measuring device having a position-sensing unit, a processing unit and an interface unit. The position-measuring device is connectable via the interface unit and a bidirectional data channel to subsequent electronics for communication purposes. A synchronous data stream is generated from an asynchronous data stream arriving at the position-measuring device from a direction of the subsequent electronics by sampling the asynchronous data stream in a time pattern of a clock signal. A gate signal is generated upon an enable condition for outputting the trigger signal being detected by evaluating the synchronous data stream. The asynchronous trigger signal is generated upon the gate signal being present and a signal edge of the asynchronous data stream occurring.