METHOD OF DETECTING SURFACE DEFECTS OF CYLINDRICAL OBJECTS Russian patent published in 2016 - IPC G21C17/00 

FIELD: measuring equipment.

SUBSTANCE: invention relates to control and measurement equipment and can be used in production of nuclear fuel, in particular, for detection of defects (inspection) of appearance of fuel pellets. In disclosed method of detecting surface defects of cylindrical objects, inspected cylindrical object is moved through an inspection position, where side surface of object is illuminated with N light beams, which form on inspected surface of N light bands, forming a light band closed along perimeter of object. Light bands are located in one plane perpendicular to longitudinal axis of object and lying at an angle α to direction of illumination. Image of bands are detected by N photodetector arrays, optical axes of which lie in plane of light bands. In analytical device based on deviations of position of images bands from normal position, presence of surface defects is determined and a decision on suitability of object is made based on criteria: depth, length and area of defects.

EFFECT: higher efficiency of inspecting surface of cylindrical objects.

4 cl, 7 dwg