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:
Dec. 30, 2008
Filed:
Jul. 31, 2006
Andreas Schroter, Traunstein, DE;
Steffen Bielski, Garching/Alz, DE;
Andreas Schroter, Traunstein, DE;
Steffen Bielski, Garching/Alz, DE;
Dr. Johannes Heidenhain GmbH, Traunreut, DE;
Abstract
A field-modulating angular position measuring device includes a scanning device, a measuring graduation, and evaluation electronics, the scanning device and the measuring graduation being arranged at a scanning distance rotatably relative to each other, and angle-dependent output signals being producible by the scanning device, which may be processed further in the evaluation electronics. The angular position measuring device furthermore has a unit for determining the signal amplitudes of the output signals. The angular position measuring device furthermore includes a temperature sensor, which is able to determine a temperature in the angular position measuring device. The angular position measuring device is configured such that the scanning distance may be determined on the basis of the temperature and the signal amplitudes. Furthermore, a method for operating such an angular position measuring device makes it possible, e.g., to determine a change in length of a shaft.