Simultaneous Multiparameter Measurement in Pulsed Eddy Current Steam Generator Data Using Artificial Neural Networks

2016 ◽  
Vol 65 (3) ◽  
pp. 672-679 ◽  
Author(s):  
Jeremy A. Buck ◽  
Peter Ross Underhill ◽  
Jordan E. Morelli ◽  
Thomas W. Krause
2010 ◽  
Vol 670 ◽  
pp. 336-344
Author(s):  
Tomasz Chady ◽  
Ireneusz Spychalski ◽  
Takashi Todaka

In certain applications (security, biomedical, food and wood testing etc.) it is necessary to detect and identify position of small metal particles with high precision. This paper presents an eddy current system designated for evaluation of conductivity distribution. The system was modeled using the finite element method as well as it was constructed and the measurements were carried out. Using these results a data base of the signals achieved for various configurations of the test objects were created. The data base was utilized to solve the identification problem. Artificial neural networks were utilized as the inverse models in order to reconstruct two-dimensional distribution of conductivity. Selected results achieved for simulated signals were presented.


1998 ◽  
Vol 60 (2) ◽  
pp. 89-100 ◽  
Author(s):  
Soteris A Kalogirou ◽  
Constantinos C Neocleous ◽  
Christos N Schizas

The paper deals with the non-destructive evaluation of the airgap existing between parts in loose metallic assemblies, using the eddy current (EC) method. In this study, the relationship between the variations of the impedance of a ferrite-cored coil sensor and an assembly featuring two aluminum plates is analyzed. Then artificial neural networks, based on statistical learning of the relationship between a sensor and an assembly are proposed and developed using both simulated and measured multi-frequency EC data, so as to estimate the distance between the assembly parts in a range from 0 µm to 500 µm. For the neural network built on experiment data, the inaccuracy of obtained results is smaller than 1.06%.


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