Patent · US Active

Multiturn rotary encoder

US8825439B2 · kind B2 · utility

3Cited by

5References

10Claims

0Family size

Assignee

DR. JOHANNES HEIDENHAIN GMBH · DE

Inventors

Elmar Mayer · Nußdorf, DE
Thomas Schuermann · Rosenheim, DE
Michael Walter · Kornwestheim, DE

Key dates

Filing date	Aug 31, 2009
Grant date	Sep 2, 2014
Priority date	—
Expiry date	Aug 17, 2030

Classification

Technology area (CPC G)Physics
CPC primaryG01D2205/26
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A multiturn rotary encoder includes a singleturn code disk which is joined in rotatably fixed manner to a shaft and which has a code track that is scannable by a singleturn scanning unit to ascertain the absolute position within one revolution of the shaft, a multiturn unit for measuring revolution data which are suitable for ascertaining the number of revolutions performed by the shaft, and an evaluation unit which is connected to the multiturn unit via at least two digital interfaces for transmitting the revolution data. The revolution data include at least two data words which have a different rate of change during rotation of the shaft, the interface for transmitting the data word having the highest rate of change to the evaluation unit is a parallel interface, and the interface for transmitting the data word having the lowest rate of change to the evaluation unit is a serial interface.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.