METHOD OF DETECTING SURFACE DEFECTS AND DEVICE FOR DETECTING SURFACE DEFECTS Russian patent published in 2017 - IPC G01N21/892 

FIELD: physics.

SUBSTANCE: optical detection method for detecting a defect in the surface of a steel material comprises the step of illuminating a predetermined control portion by illumination light beams with different radiation directions using two or more different light sources. The detection step, where the image is received by using the reflected light beams corresponding to the specified illumination light beams, and the surface defects on the specified plot control detects by performing the process of subtraction between the obtained images. The detection device of surface defects of a steel material contains a lighting node of a given control area with the light beams, a discovery node made with the possibility of obtaining images using reflected light beams and detecting the surface defects on the specified control area by performing the process of subtraction between the obtained images.

EFFECT: ensuring a high distinctive precision of scale or harmless pattern from a surface defect.

21 cl, 26 dwg