High Frequency Eddy Current Testing
نویسندگان
چکیده
This paper presents a nondestructive, high frequency electromagnetic evaluation method which can be applied for the examination of periodic conductive strips or conductive fibers using the evanescent modes generated in slits or in dielectric insulation between conductive fibers. For the detection of evanescent waves we propose the use of lenses with metamaterials, both conical Swiss roll type and diffraction type through a circular aperture having a diameter smaller than the wavelength of the excitation wave. This method allows electromagnetic nondestructive evaluation of the metallic strip gratings used in flexible printed circuits. This is in order to allow detection of discontinuities as well as the status of the carbon fiber and eventually the status of delamination due to impacts upon the carbon fiber reinforced plastics composites.
منابع مشابه
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