Abstract
This work presents an axially symmetric mathematical model of an I-cored coil placed over a two-layered conductive material with a cylindrical surface hole. The problem was divided into regions for which the magnetic vector potential of a filamentary coil was established applying the truncated region eigenfunction expansion method. Then the final formula was developed to calculate impedance changes for a cylindrical coil with reference to both the air and to a material with no hole. The influence of a surface flaw in the conductive material on the components of coil impedance was examined. Calculations were made in Matlab for a hole with various radii and the results thereof were verified with the finite element method in COMSOL Multiphysics package. Very good consistency was achieved in all cases.
| Original language | English |
|---|---|
| Pages (from-to) | 7-12 |
| Number of pages | 6 |
| Journal | Measurement Science Review |
| Volume | 18 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 1 Feb 2018 |
Keywords
- Nondestructive testing
- calculation
- coil impedance
- eddy current
- modeling
- truncated region eigenfunction expansion
ASJC Scopus subject areas
- Control and Systems Engineering
- Biomedical Engineering
- Instrumentation
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