Electricity: measuring and testing – Magnetic – Plural tests
Patent
1994-02-28
1995-08-15
Strecker, Gerard R.
Electricity: measuring and testing
Magnetic
Plural tests
73660, 32420718, 324219, 324226, 324240, 324241, G01N 2790, G01H 1102
Patent
active
054422850
ABSTRACT:
The present invention provides an eddy current sensing device capable of in-situ operation within a high temperature and high vibration environment of a combustion turbine engine. The eddy current sensing device is preferably utilized in an eddy current sensing system for monitoring crack formation and displacement of rotating members of the combustion turbine engine. The method according to the present invention provides inducing eddy currents in the rotating member, detecting the eddy currents, providing a signal indicative of the detected eddy currents, filtering the signal based on the condition to be monitored and evaluating the filtered signal to determine whether the condition, such as the formation of a crack in the surface of the rotating member exists, and if so, determining whether the condition is critical or routine.
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Bertsch Oran L.
Guenther Paul
Metala Michael J.
Moore Charles C.
Zombo Paul J.
Panian M. G.
Strecker Gerard R.
Westinghouse Electric Corporation
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