Patents by Inventor Achim Ruff

Achim Ruff has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 6483104
    Abstract: It is known that CCD lines can be used to produce fast angle of rotation sensors, where the light distribution controlled by a code disk is measured with a pixel line and converted into corresponding digital values by an analyzer unit. The object of the present invention is to create a position sensor with a high resolution. For this purpose, the invention proposes several measures, such as pulsed operation of the light source and using a digital code for the code element. Advantageous embodiments involve selecting a maximum code and more accurate determination of the approximate position value thus obtained from the resulting digital value. A further improvement in measurement accuracy can be achieved by shifting the code track or several code tracks arranged radially one inside the other.
    Type: Grant
    Filed: February 11, 1999
    Date of Patent: November 19, 2002
    Assignee: Valeo Schalter und Sensoren GmbH
    Inventors: Jurgen Benz, Achim Ruff