Device and process for high-precision measurement of the phase relationship and phase displacement, respectively, of two pulse trains

US4499760A · kind A · utility

Assignee

• Heidelberger Druckmaschinen AG · DE

Inventors

• Rudolf Fischer · Erding, DE
• Nikolaus Spiegel · Walldorf, DE

Key dates

• Filing date: Feb 15, 1983
• Grant date: Feb 19, 1985
• Expiry date: Feb 15, 2003

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R25/08
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

Process for high-precision measurement of the phase relationship and phase displacement, respectively, of two pulse trains wherein rotational angles of two rotating bodies are quantized and converted by incremental shaft encoders into pulse trains, and the pulse trains are applicable for calculating the respective phase relationship and phase displacement, which comprises the steps of: PA0 a. counting the pulse trains in at least two different counters; PA0 b. forming a digital difference of the two counts; PA0 c. converting the digital difference into an analog signal; PA0 d. decoding the analog signal; and PA0 e. displaying the decoded analog signal; and a device for performing the process.