A Planar Eddy Current Probe Based on Fractal Geometry

A Koch geometry curve exciting eddy current probe was proposed based on fractal geometry and self-similar structure equipment. The FEMs were simulated with COMSOL multi-physics software. And an experiment platform was built to validate the eddy current probe. Compared with the circular exciting coils, the Koch geometry curve exciting eddy current probe can induce higher partial eddy current density in conductor and improve the distribution pattern of eddy current so as to improve the sensitivity of eddy current probe for small defect. Experiments validate that, the planar Koch curve exciting eddy current probe is useful in flexibility eddy current probe and can supply detection data for the system SHM.