Grating surface blemish detection device

The invention relates to a grating surface blemish detection device. At present, enterprises visually detect grating surface blemishes depending on workers, the defects of low automation degree, low detection accuracy, low reliability, low detection efficiency, large artificial subjective error and high detection cost are generated. The grating surface blemish detection device comprises an upright column (1) and a control module, wherein the upright column (1) is connected with a short arm (2); both sides of the short arm (2) are respectively connected with a pair of rough-fine adjusters; the short arm (2) is connected with a long arm (3); the long arm (3) is connected with the grating surface image acquirer through a through hole; the output end of an industrial personal computer (7) is connected with the input end of a control system (8); the signal output end of the control system (8) is connected with driving motors (9) and a light source (10); the driving motors (9) are connected with a grating screening mechanism (11), grating image two-dimensional translational tables (12) and a grating cleaning mechanism (13); and the light source (10) is arranged on the grating image detection platform. According to the grating surface blemish detection device disclosed by the invention, the accuracy, the resolution, the automation and the detection efficiency of the grating surface blemish detection device are improved.