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An In-Place Recalibration Technique to Extend the Temperature Capability of Capacitance-Sensing, Rotor-Blade-Tip-Clearance Measurement Systems
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Event:
Aerospace Meeting
Language:
English
Abstract
It is known that capacitance-sensing, rotor-blade-tip-clearance measurement systems suffer from a strong dependency on probe tip temperature and humidity. A novel in-place recalibration technique partly overcomes this problem through a simple modification of the electronics that permits a scale factor correction. The technique is used to reduce the errors in a commercial system by more than 50 percent up to a temperature of 370° C (700° F). A probe design is proposed to further raise the maximum temperature capability of the measurement system.
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Citation
Barranger, J., "An In-Place Recalibration Technique to Extend the Temperature Capability of Capacitance-Sensing, Rotor-Blade-Tip-Clearance Measurement Systems," SAE Technical Paper 781003, 1978, https://doi.org/10.4271/781003.Also In
References
- Oliver F. J. “Practical Instrumentation Transducers.” New York, N. Y. Hayden Book Company, Inc. 1971 20
- “Reference Data for Radio Engineers.” Indianapolis, Ind. 6th Howard W. Sams & Co. 1975 24 4
- Barranger J. P. “In-Place Recalibration Technique Applied to a Capacitance-Type System for Measuring Rotor Blade Tip Clearance.” NASA TP-1110 April 1978