Measuring and testing – Turbine engine
Reexamination Certificate
2005-10-19
2008-09-16
McCall, Eric S (Department: 2855)
Measuring and testing
Turbine engine
Reexamination Certificate
active
07424823
ABSTRACT:
Methods and apparatuses are described for determining the operating status of a turbine engine. An eddy current sensor is provided having a sensing field in communication with a plurality of rotating turbine blades during a revolution of a turbine engine. The sensor generates signature data for the passage of each blade. An analytic waveform is determined from the signature data and blade characteristic data is determined from the analytic waveform.
REFERENCES:
patent: 4468620 (1984-08-01), Vaerman
patent: 5479826 (1996-01-01), Twerdochlib et al.
patent: 5942893 (1999-08-01), Terpay
patent: 7023205 (2006-04-01), Krupp
patent: 2004/0051525 (2004-03-01), Hatcher et al.
patent: 2005/0200355 (2005-09-01), Hatcher et al.
patent: 2005/0270519 (2005-12-01), Twerdochlib
patent: 2006/0078193 (2006-04-01), Brummel et al.
patent: 2006/0097719 (2006-05-01), Moore
patent: 2006/0120197 (2006-06-01), Teolis et al.
Dowell, M., et al., “Turbomachinery Prognostics and Health Management via Eddy Current Sensing: Current Developments”, Preprint, 1998.
Teolis, C., et al., “Analytic Representation of Eddy Current Sensor Data for Fault Diagnostics”, pp. 1-11, undated.
Haase, W. C .,et al., “Detection and Characterization of Blade/Disk Cracks in Operational Turbine Engines”, Proceedings of IEEE Aerospace Conference, 2003.
Jones., H., “A Nonintrusive Rotor Blade Vibration Monitoring System”, ASME 96-GT-84, International Gas Turbine and Aeroengine Conference, 1996.
Lackner, M., “Vibration and Crack Detection in Gas Turbine Engine Compressor Blades using Eddy Current Sensors”, MIT Thesis, Master of Science, 2004.
Heath, S., “A New Technique for Identifying Synchronous Resonances Using Tip-Timing”, ASME-2000, Journal of Engineering for Gas Turbines and Power, vol. 122, Apr. 2000.
Health, S., et al., Heath and M. Imregun, “An Improved Single-Parameter Tip-Timing Method For Turbomachinery Blade Vibration Measurements Using Optical Laser Probes”, Int. J. Mech. Sci., vol. 38, No. 10, pp. 1047-1058, 1996.
Heath, S., et al., “Turbomachinery Blade Tip Measurement Techniques”, Rolls-Royce Civil Aero Engines Ltd, undated.
Teolis Anthony
Teolis Carole
DLA Piper (US) LLP
McCall Eric S
Techno-Sciences, Inc.
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