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Sensor system for determining a physical, measured variable

  • US 8,197,135 B2
  • Filed: 11/24/2006
  • Issued: 06/12/2012
  • Est. Priority Date: 12/23/2005
  • Status: Active Grant
First Claim
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1. A sensor system for determining a physical, measured variable, comprising:

  • a sensor; and

    a control/evaluation unit, which are spatially separated from the sensor and electrically conductively connected with the sensor via a cable having at least two conductors, wherein;

    provided in said sensor are a temperature measuring element for determining temperature and a sensor identifier for sensor identification;

    said control/evaluation unit drives said temperature measuring element and said sensor identifier with a positive voltage or a negative voltage via a shared conductor of said at least two conductors and, depending on the applied voltage, reads a temperature measured value of said temperature element or an identifying value of said sensor identifier;

    a temperature-dependent resistance is provided in said temperature measuring element; and

    an identifying resistance is provided in said sensor identifier; and

    in series with said temperature-dependent resistance and/or in series with said identifying resistance, in each case, an electrical blocking element of opposed blocking direction is provided.

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