Revolution counter and method for determining the number of revolutions of a shaft

Patent metadata

Field	Value
Publication number	US-8990044-B2
Application number	US-200913140201-A
Country	US
Kind code	B2
Filing date	Dec 14, 2009
Priority date	Dec 19, 2008
Publication date	Mar 24, 2015
Grant date	Mar 24, 2015

Abstract

A revolution counter including sensors, which generate position values that define an angular position of a shaft, and a determination unit that receives the position values and generates decision signals therefrom, wherein the decision signals determine counting sectors. The revolution counter includes a counting control unit that receives the counting sectors, and operates the revolution counter in a first mode or a second mode of operation. The counting control unit switches over to the second mode, if after a length of time no change in one of the counting sectors takes place, and switches over to the first mode if a change in one of the counting sectors does take place. The determination unit determines an uncertainty range between each pairing of the counting sectors. The counting control unit does not take the uncertainty ranges into account for the switchover from the second mode to the first mode.

First claim

I claim:

1. A revolution counter for determining the number of revolutions of a shaft, the revolution counter comprising:
sensors, with which position values that define an angular position of a shaft are generated;
a determination unit that receives said position values from said sensors and generates decision signals from said position values, wherein said decision signals determine counting sectors within one revolution of said shaft;
a counting control unit that receives s…

Assignees

• Oberhauser Johann
• Heidenhain Gmbh Dr Johannes

Inventors

• Oberhauser Johann

Classifications

• G01D5/145 Primary

  Physics · mapped topic