Magnets and Hall-effect transducers used to monitor tip-to-shroud clearances. Mounting permanent magnet in end of fan blade and monitoring tip-to-shroud distance by use of output of Hall-effect transducers affixed to surface of shroud. Transducers provide real-time information. By placing magnets in each fan-blade tip, complete set monitored sequentially as each blade rotates past sensor. Application in many rotating machines, providing surrounding materials nonmagnetic and temperatures not severe.
Measuring Fan-Blade-Tip Displacements
NASA Tech Briefs ; 12 , 5
1988-05-01
Miscellaneous
No indication
English
Measuring surface displacements optically
NTRS | 1979
|European Patent Office | 2020
European Patent Office | 2019
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