Abstract
Based upon the fact that internal conductivity of the crack has a serious effect on the eddy current signals, two kinds of inversion schemes that can reconstruct cracks with non-vanishing conductivity from eddy current signals are proposed in this paper. One is a physics-based approach that modifies crack parameters iteratively and the other is a neuronet-based approach. Two models that are supposed to be appropriate models of a natural crack are also proposed. After detailed explanation of the schemes, several reconstruction results using simulated data are presented. The results show these schemes can reconstruct crack profile with high accuracy where not only shape of the crack but also internal conductivity is unknown. Advantages and disadvantages of both schemes are discussed at the end of the paper.
| Original language | English |
|---|---|
| Pages (from-to) | 9-18 |
| Number of pages | 10 |
| Journal | NDT and E International |
| Volume | 35 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2002 Jan |
Keywords
- Eddy currents
- Inverse problem
- Modeling
- Natural cracks