A Characteristic Galerkin Method for Eddy-Current Field Analysis in High-Speed Rotating Solid Conductors

2012 ◽  
Vol 48 (11) ◽  
pp. 4634-4637
Author(s):  
S. L. Ho ◽  
Yanpu Zhao ◽  
W. N. Fu
Keyword(s):  
Galerkin Method ◽  
Eddy Current ◽  
High Speed ◽  
Field Analysis ◽  
Current Field ◽  
Solid Conductors

Crack Sizing of Deep Cracks in Eddy Current Testing Using 3D Electromagnetic Field Analysis

2004 ◽  
Author(s):  
Toshiyuki Takagi ◽  
Tetsuya Uchimoto ◽  
Hisashi Endo
Keyword(s):  
Eddy Current ◽  
Crack Depth ◽  
High Accuracy ◽  
Eddy Current Testing ◽  
Field Analysis ◽  
Current Field ◽  
Metal Structures ◽  
Current Testing ◽  
Crack Sizing ◽  
Exhaustive Study

A computer-aided approach of the eddy current testing (ECT) is described to detect and to size up deep cracks in thick metal structures. A 3D eddy current field analysis based on the finite elements performs designing ECT probes and evaluating the size of crack depth quantitatively. An exhaustive study on the ECT probe specification gives the optimal design of coil elements and their combination. The experimental verification shows that the developed ECT probe employing double exciting coils is capable of detecting crack depth over 10mm from the inspection surfaces. The depth of cracks is quantitatively evaluated from the measured ECT signals with the help of numerical calculation. The results of evaluation profile the crack shapes with fairly high accuracy, supporting our approach.

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