ENCODER WHEEL ASSEMBLY AND METHOD FOR ASCERTAINING AN ABSOLUTE ANGULAR POSITION AND A ROTATIONAL DIRECTION

• Main Authors: Hanel, Stephan, Merkel, Tino, Utermoehlen, Fabian, Letzgus, Matthias, Eckert, Bernd, Maur, Marcel
• Format: Patent
• Language: English
• Published: 05.12.2019
• Subjects: ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVEREDIN A SINGLE OTHER SUBCLASS; MEASURING; MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR; PHYSICS; TARIFF METERING APPARATUS; TESTING

The invention relates to an encoder wheel assembly ( ) for ascertaining an absolute angular position ( ) and a rotational direction ( ) of a rotor ( ), comprising the following: a first encoder wheel ( ) which is rotationally fixed to the rotor ( ) said first encoder wheel ( ) having a number n of teeth ( ) which are arranged in a uniformly spaced manner along the circumference of the encoder wheel; a second encoder wheel ( ) which is rotationally fixed to the first encoder wheel ( ) said second encoder wheel ( ) having the same number n of teeth ( ) as the first encoder wheel ( ) along the circumference of the encoder wheel, wherein the teeth ( ) of the second encoder wheel ( ) have an asymmetrical angular offset relative to the teeth ( ) of the first encoder wheel ( ) a first sensor ( ) which is designed to scan the first encoder wheel ( ); a second sensor ( ) which is designed to scan the second encoder wheel ( ); and a controller ( ) which is connected to the first sensor ( ) and the second sensor ( ) in a communicative manner, said controller being designed to ascertain the absolute angular position ( ) and the rotational direction ( ) on the basis of a binary signal ( ) which is derived from a first signal ( ) of the first sensor ( ) and a second signal ( ) of the second sensor ( ).