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System for improving measurement accuracy of transducer by measuring transducer temperature and resistance change using thermoelectric voltages

  • US 5,481,199 A
  • Filed: 09/24/1993
  • Issued: 01/02/1996
  • Est. Priority Date: 09/24/1993
  • Status: Expired due to Fees
First Claim
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1. A constant current loop measuring system measuring a property including a temperature of a sensor responsive to an external condition being measured, comprising:

  • thermocouple conductors connected to the sensor, sensing first and second induced voltages responsive to the external condition;

    current generating and reversing means for generating a constant current, and for supplying said constant current to said thermocouple conductors in forward and reverse directions generating first and second measured voltages, each of said first and second measured voltages including said first and second induced voltages; and

    determining means for receiving said first and second measured voltages from said current generating and reversing means, and for determining the temperature of the sensor responsive to said first and second measured voltages.

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