Patent ID: 8154427
Filing Date: 2012-04-10
Classification: G01D

Abstract:
1. A multiturn rotary encoder comprising: a single-turn unit, including a code carrier that is scannable by a single-turn scanner to generate single-turn position signals, and a single-turn evaluation unit adapted to process the single-turn position signals to form a single-turn code word that indicates an absolute position of an input shaft within one revolution; a first multiturn unit, including at least one first multiturn code carrier that is scannable by a first multiturn scanner to generate first multiturn position signals, and a first multiturn evaluation unit adapted to process the first multiturn position signals to form a first multiturn code word that indicates a number of revolutions covered by the input shaft; and a second multiturn unit, including at least one second multiturn code carrier that is scannable by a second multiturn scanner to generate second multiturn position signals, and a second multiturn evaluation unit adapted to process the second multiturn position signals to form a second multiturn code word that also indicates the number of revolutions covered by the input shaft.