METHOD FOR MEASURING THICKNESS OF COATING Russian patent published in 1994 - IPC

FIELD: measuring equipment. SUBSTANCE: method involves irradiating reference samples of materials with atomic numbers approaching closely those of the coating material with bunches of beta radiation with energies E₁ and E₂, recording each time the intensities of backscatter beta radiation. The bunch with boundary energy E₁ is selected on the condition of ensuring saturation intensity of backscatter flow of beta radiation. Intensity n_∞(E₂) of saturated flow of backscatter radiation with boundary energy E₂ from coating material is determined by recording the flows with boundary energies E₁ and E₂ from reference samples and recording the flow E₁ from test article. Normalized signal is calculated by the relation submitted in the description. Thickness of coating is found from the graduating characteristic of thickness gauge. EFFECT: higher accuracy of measuring thickness of multicomponent coating of variable composition. 1 dwg