Optimization of Flexible Eddy Current Patterns with Low Sensitivity to Lift-Off
Résumé
Eddy Current is a powerful mean of detection of defects located close to the surface in conductive parts. The use of winding coils has shown good efficiency and gave good results in lots of applications. Nevertheless, it reveals some limits in some cases, when the part has a complex shape for instance. Therefore, other technologies are investigated such as coils etched on kapton film. Thanks to this technology, it is possible to design efficient probes with a low sensitivity to lift-off, on the one hand thanks to the flexibility of the sensor, and on the other hand thanks to the intrinsic design of the pattern. The paper presents the method to optimize these two patterns and a comparison between simulation data and experimental data.