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Device , Sensor Arrangement and Method for the Capacitive Position Finding of a Target Object

  • US 20070205775A1
  • Filed: 03/31/2005
  • Published: 09/06/2007
  • Est. Priority Date: 04/16/2004
  • Status: Abandoned Application
First Claim
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14. Method for capacitive position finding of a target object, in which a plurality of capacitive probes (20, 30, 40) is arranged over a detection area (16) in which a position of the target object (12) is to be determined, characterized in that the probe voltages are dependent on the spacing of the target object from the given probe and are evaluated for determining the position of the target object, that the probes (20, 30, 40) are in each case supplied with a supply voltage across coupling capacitances (22, 32 42), capacitive voltage dividers with the probe voltages as mean voltages being formed through the coupling capacitances (22, 32, 42) and by the capacitances (24, 34, 44) of probes (20, 30, 40) to the environment varying as a result of a position change of the target object (12) to be detected and that the probe voltages are processed with an evaluating device (50) to an output signal, which is a measure of the position of the target object (12) to be found.

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