Turbine blade vibration detection apparatus
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United States of America Patent
Stats
-
Nov 8, 1983
Grant Date -
N/A
app pub date -
Jul 29, 1981
filing date -
Jul 29, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Turbine blade vibration detection apparatus having two or more extremely narrow beam radar sensors positioned to direct their radar signals towards predetermined blade row or rows. A blade identification circuit is provided for each blade row having an associated radar sensor for providing an output count indicative of which blade is being examined by a particular radar sensor. The gating of the blade count and radar sensor signals is governed by a computer which performs a frequency analysis of the radar signals and compares the result with predetermined threshold values.
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