Infrared thermal imaging system for detecting online slab surface defects

The utility model discloses an infrared thermal imaging system for detecting online slab surface defects, which belongs to the field of ferrous metallurgy continuous casting process and comprises an infrared thermal imaging device, an image acquisition card and a processor. The infrared thermal imaging device is positioned after the hot-state plate blank is discharged from the continuous casting fan-shaped section and in front of the flame cutting machine, and is used for acquiring a surface temperature image of the plate blank; a slab surface temperature image signal output end of the infrared thermal imaging device is connected with an image signal input end of the image acquisition card; and an image signal output end of the image acquisition card is connected with an image signal input end of the processor. According to the utility model, the infrared thermal imaging device is adopted to collect the surface temperature of the slab, crack defects can be displayed, real-time online detection can be carried