Electricity: measuring and testing – Magnetic – Plural tests
Patent
1993-12-13
1997-09-23
O'Shea, Sandra L.
Electricity: measuring and testing
Magnetic
Plural tests
324262, 73660, G01N 2790, G01N 2782, G01M 122
Patent
active
056708793
ABSTRACT:
A nondestructive inspection device and a method of monitoring a defective condition in a rotating member of a combustion turbine engine using a nondestructive inspection device is presented. The nondestructive inspection device includes a sensor for monitoring the rotating member and a holder assembly for positioning the sensor near the rotating member without disassembling the combustion turbine engine. The holder assembly is capable of interchangeably positioning either an ultrasound transducer or an eddy current sensor. Signals indicative of the monitored condition are recorded and compared to a signal representation generated from a reference standard having a known defect so that a defective condition can be ascertained. The location of a defective condition is ascertained by using a magnetic belt having a plurality of magnets wrapped around the rotating member and an additional sensor to detect the magnets as they rotate. A signal indicative of the detected magnets is recorded along with the signal indicative of the monitored condition so that the angular position of the rotating member can be correlated with a detected defect.
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Guenther Paul
Metala Michael J.
Moore Charles C.
Zombo Paul J.
O'Shea Sandra L.
Phillips Roger C.
Westinghouse Electric Corporation
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