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:
Oct. 20, 1998
Filed:
Jun. 24, 1996
Ulrich Hipp, Sulz, DE;
Manfred Abendroth, Marbach, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
The sensing device for determination of a steering wheel angle of a steering column of a vehicle includes a first coded disk which is read by a first group of receiving devices to form a fine code signal and which rotates at the same speed as the steering wheel. A second coded disk rotates with a fourth the speed of the first disk and has two or more pole change positions which are detected by a second group of receiving devices to form a gross code signal. Hall elements are used as receiving devices. Magnetically coded disks having a predetermined sequence of alternating North and South pole regions are used as the coded disks. These regions are distributed around the periphery of the disk and have different arc lengths. Hall switching devices are used as receivers which cooperate with the magnetic regions of the coded disks. An accurate angle position signal for the steering wheel is produced by a device for combining the fine and gross code signals produced by the Hall switching devices which includes a microcomputer .mu.C.