Abstract
The sensitivity of eddy current (EC) nondestructive testing (NDT) probe is mainly related to the EC distribution in conductive specimens. To improve the sensitivity of this type of probes, a planar probe with a Koch curve excitation coil that can induce a multiradius EC distribution is proposed. FEM simulation was conducted to visualize the electromagnetic field distribution and understand the operating principle of the probe. A planar EC probe with a Koch curve excitation coil and an experimental measurement system was developed. A set of aluminum plates with different sizes of defects were tested to assess the improved sensitivity of the Koch curve-based probe.
| Original language | English |
|---|---|
| Pages (from-to) | 470-478 |
| Number of pages | 9 |
| Journal | Measurement: Journal of the International Measurement Confederation |
| Volume | 124 |
| DOIs | |
| Publication status | Published - Aug 2018 |
Keywords
- Eddy current
- Fractal geometry
- Koch curve
- Multiradius eddy current
- Self-similarity
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