University of Notre Dame Du Lac

Scott C Morris

Joshua Cameron

Thomas C Corke

Eric H Matlis

Thomas G Pratt

Jeffrey George Mueller

Robert Daniel Kossler

Neil Dodson

John R Fagan

A gas turbine engine with a closed loop working fluid cycle.

Gas turbine architecture integrating a working fluid cycle

Systems and methods for monitoring rotating machinery are disclosed. Transmitter and receiver antennas can be provided with access to the rotating machinery. At least one receiver signal resulting from at least one transmitter signal that has propagated through a portion of the rotating machinery can be obtained. A first signal pair can be formed from a first receiver signal and a first transmitter signal, or from first and second receiver signals obtained from spatially-separated receiver antennas, or from first and second receiver signals which are attributable to different transmitter signals. Amplitude and phase information of a plurality of frequency components for each signal in the first signal pair can be determined. A set of comparison values for the first signal pair can be determined by comparing respective frequency component phases or respective frequency component amplitudes. A characteristic of the rotating machinery can then be analyzed using the comparison values.

Monitoring rotating machinery using radio frequency probes

Plasma sensors, systems and related methods are described. An example method for predicting an event includes providing a carrier signal across two electrodes and forming a plasma between the two electrodes. The example method also includes measuring a modulated signal from the plasma, manipulating the modulated signal to produce a value and comparing the value to a threshold. Finally, the example method includes determining the likelihood of the event based on the comparison.

Plasma sensors and related methods

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Granger, IN, United States of America

Scott C Morris