Abstract
Eddy current field excited by a probe coil near a conductive pipe is studied analytically by means of a second-order vector potential formalism in this paper. Closed-form expressions of the second-order vector potentials are deduced directly in the cylindrical coordinate system by using the Biot-Savart law and the reciprocal of distance described by the modified Bessel functions and exponential functions. Both the impedance change of an excitation coil and the induced voltage in a pick-up solenoid coil are obtained. The theoretical results are in excellent agreement with the experimental results, which verifies the analytical solutions.
| Original language | English |
|---|---|
| Pages (from-to) | 69-74 |
| Number of pages | 6 |
| Journal | NDT and E International |
| Volume | 54 |
| DOIs | |
| Publication status | Published - 2013 |
| Externally published | Yes |
Keywords
- Analytical solution
- Eddy current testing
- Electromagnetic field
- Pipe
- Probe coil