Abstract
Eddy current testing (ECT) does not require any direct contact and can be composed of a relatively simple mechanical structure. Further, it is possible to carry out the nondestructive testing with high speed. Thereby, ECT is widely applied to the maintenance works of various fields.Previously, we have proposed the current viewer based on the Ampere's law. This current viewer has theoretically infinite high-resolution capability searching for the current flowing paths in the printed circuit boards (PCBs). Furthermore, we have developed the vector current viewer, which makes it possible to on-line visualization of the current distributions on the PCBs.Principal purpose of this paper is to check up the possibility of our current viewer as a new ECT probe. As an initial test, we have carried out several experiments to identify the cracks in metallic materials, e.g. aluminum and cupper. And we have visualized the magnetic field distribution by finite element method. As a result, it is revealed that the operating principle of our method is verified by the visualized magnetic field distributions.
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