Laser measurement system for detecting turbine blade lockup
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United States of America Patent
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Jun 5, 2018
Issued Date -
Jun 23, 2016
app pub date -
Dec 19, 2014
filing date -
Dec 19, 2014
priority date (Note) -
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Abstract
A laser measurement system for detecting at least one locked blade assembly in a gas turbine. The system includes at least one laser device for emitting a laser beam that impinges on a blade surface of each blade in a row of blade assemblies. The laser beam is also transmitted through a space between adjacent blades to impinge on corresponding internal surfaces of the gas turbine. Further, the system includes a photon detector for detecting a first time period in which first laser energy is reflected from each blade surface and a second time period in which second laser energy is reflected from each internal surface and transmitted through each space. The system also includes a controller for detecting a change in at least one second time period to indicate that a distance between consecutive blades has changed and that at least one locked blade assembly is locked.
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