Patents Assigned to Carl Mahr Holding GmbH
  • Patent number: 6700391
    Abstract: A distance measuring system (1) is provided with a capacitive sensor (7a, 7b), designed in the form of a differential capacitor (18), for which the partial capacitors (C1, C2 have capacitances that depend on the position to be determined. The system also includes a processing device (5) for determining the desired distance that contains, for example, a sigma/delta demodulator. The partial capacitors (C1, C2) are triggered periodically with binary signals, wherein the trigger signals from the one partial capacitor (C1) are transmitted with a phase offset to the signals from the other partial capacitor (C2). The processing device (5) determines which trigger signals must be used for the evaluation. Within time windows that are synchronized with the edges of the trigger signals, a switch unit (22) allows the associated receiving signals to pass through to the processing unit (5) and blanks out all other signals.
    Type: Grant
    Filed: March 20, 2002
    Date of Patent: March 2, 2004
    Assignee: Carl Mahr Holding GmbH
    Inventors: Peter Strack, Christian Steiner