MONITORING OF CLEARANCE
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United States of America Patent
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Issued Date -
Sep 19, 2013
app pub date -
Dec 9, 2011
filing date -
Dec 14, 2010
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
The clearance between a stationary object (such as a gas turbine engine casing) and one or more moving objects (such as the blades of a rotating turbine) is measured using a pair of electrical proximity sensors mounted on the stationary object with their sensitive fields directed towards the path of the moving object(s) and at angle to each other. The clearance is calculated by deriving a time interval between interceptions of the respective moving object with the sensitive fields of the two sensors and from the geometry of the set up.
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