UHF METHOD OF DETERMINATION OF DIELECTRIC PERMEABILITY AND THICKNESS OF COATINGS ON METAL Russian patent published in 2015 - IPC G01N22/00 G01R27/26 

FIELD: electricity.

SUBSTANCE: method provides initiation of electromagnetic oscillation of a certain spatial structure and measurement of resonant frequencies at replacement of one of resonator end faces with a sample alternately by a side of coating and metal, for this purpose in addition on one of end walls dielectric with the height h and dielectric permeability ε_d and the diameter equal to the resonator diameter is placed, spatial oscillation of H₀₁₁ type is excited, the resonant frequencies f₁ and f₂ of the resonator respectively are measured for installation on the open opposite end wall of a sample alternately by a side of coating and metal substrate, the open end wall is closed, the resonant frequencies f₃ and f₄ respectively are measured at replacement by another end wall where the exciting dielectric is located, by a sample alternately by a side of coating and metal substrate, the difference of frequencies Δf₂₁=f₂-f₁ is used for determination of Δh coating thickness, and using the difference of Δf₄₃-Δf₂₁ the dielectric permeability ε_n of the coating on metal is determined, where Δf₄₃=f₄-f₃, meanwhile, varying the height h and the dielectric permeability ε_d exciting the dielectric resonator, it is possible to change the sensitivity to the dielectric permeability ε_n of the coating on metal.

EFFECT: improvement of accuracy of determination of thickness and dielectric permeability of material on metal.

2 cl, 6 dwg