METHOD FOR FRACTAL CONTROL OF SURFACE ROUGHNESS Russian patent published in 2016 - IPC G01B11/30 G01N21/88 

FIELD: metal processing.

SUBSTANCE: invention relates to means of controlling microroughnesses of surfaces, obtained by mechanical engineering operations on a rough surface. Analysed surface is cleaned by plasma etching in an inert gas in modes preventing sputtering of material of analysed surface, immediately after cleaning liquid is applied onto surface in form of droplets of fixed volume. High-speed digital video camera is used to record end of flow of liquid droplets, after which perimeter and area of spread drops are determined and high-speed digital video camera is removed, then a pulsed light source is mounted above droplets and short-term light pulse is generated. Pulsed light source is removed and a video camera is used to record end of flow of liquid droplets, heated by light pulse, after which perimeter and area of spread droplets heated by light pulse are determined. Obtained data are used to determine fractal dimension of analysed rough surface.

EFFECT: higher accuracy of monitoring level of surface roughness and wider range of analysed materials.

1 cl, 1 dwg