The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 13, 2004
Filed:
Jun. 26, 2003
Siegbert Steinlechner, Leonberg, DE;
Lutz Dorfmueller, Gerlingen, DE;
Axel Wenzler, Stuttgart, DE;
Ralf Noltemeyer, Wernau, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
The invention proposes a method for determining a rotation angle (&PHgr;) and/or an angular difference (&dgr;) in a divided shaft ( ), which has a number of phase tracks ( , and ) disposed on it, which are provided with codes. Via an evaluation unit, each group of tracks ( , and ) supplies a phase signal (&agr; , &agr; ), which is respectively ambiguous with regard to a rotation of the shaft ( ). The at least two phase signals (&agr; , &agr; ) are added up in a weighted fashion to produce a signal S from which the integer portion and the non-integer portion are calculated. The non-integer portion is proportional to the angular difference (&dgr;) between the two track groups. The torque (M) is determined through multiplication with the spring rate of an interposed torque rod. The unambiguous torque (&PHgr;) is determined from the integer portion of the signal (S) and a phase value (&agr; ) or (&agr; ) with the aid of a weighted addition.