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:
Apr. 22, 2003
Filed:
Mar. 13, 2002
Frank Bläsing, Werl, DE;
Leopold Kostal GmbH & Co. KG, Ludenscheid, DE;
Abstract
An optoelectronic sensor for sensing the angular position of a rotatable device includes an encoder disk and a sensor array. The disk has a coding operable to move along a movement direction in response to rotational device movement. The coding represents an optical oscillation structure extending transversely to the movement direction of the disk and having a frequency-related parameter which varies along the movement direction such that the parameter is indicative of angular position of the device. The array includes transducers for sensing the coding. The array is arranged transversely to the movement direction such that the transducers proportionally sense a respective portion of the coding at each angular device position. The transducers generate an intensity signal indicative of the parameter of a sensed portion of the coding at an angular device position. Based on the intensity signal, the angular device position is determined from the sensed coding portion parameter.