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Method of on-line turbine blade slope and sensor position verification

  • US 7,775,114 B2
  • Filed: 09/26/2007
  • Issued: 08/17/2010
  • Est. Priority Date: 09/26/2007
  • Status: Active Grant
First Claim
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1. A method of monitoring a blade structure in a turbine comprising a plurality of radially extending blades mounted on a rotor for rotation about a rotational axis, said blade structure including at least one target portion located at a radially outer location of said blade structure, said method comprising the steps of:

  • providing a sensor adjacent said blade structure;

    positioning said sensor at a first location adjacent said blade structure;

    generating a first signal corresponding to a first target passing event sensed by said sensor at said first location;

    positioning said sensor at a second location adjacent said blade structure a known displacement from said first location;

    generating a second signal corresponding to a second target passing event sensed by said sensor at said second location; and

    producing target slope data from said first and second signals and said known displacement of said sensor.

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