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Temperature compensated eddy current sensor temperature measurement in turbine blade shroud monitor

  • US 4,970,670 A
  • Filed: 11/30/1988
  • Issued: 11/13/1990
  • Est. Priority Date: 11/30/1988
  • Status: Expired due to Fees
First Claim
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1. A system for monitoring the temperature of a plurality of turbine blade shroud segments, comprising:

  • indicia means carried by each shroud segment;

    first sensor means for producing input signals in response to the plurality of shroud segments passing said first sensor means, said input signals having a variation in magnitude caused by said indicia means;

    temperature sensor means for measuring the temperature of said first sensor means;

    first circuit means responsive to said input signals and said temperature sensing means for producing scaled input signals, said scaled input signals being substantially free of the effects of temperature on said first sensor means; and

    second circuit means responsive to said first circuit means for determining the temperature of each shroud segment based on said scaled input signals.

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