The invention belongs to a surface defect detection technology of a cylindrical inner wall to be detected, and discloses a small-
caliber inner wall micron-level defect detection method, a detection device and application of the small-
caliber inner wall micron-level defect detection method. A visual environment is built according to the size of an inner wall to be detected, a stripe
light source is placed at the bottom of the inner wall to be detected, a
CCD camera obtains an inner wall image of the stripe
light source in the inner wall from the other end, and when the inner wall has defects, defect images at the corresponding positions deflect; by designing a stripe shape, a mechanical structure and a CCD (
Charge Coupled Device)
camera image processing method, online detection of micron-sized defects of the inner wall of the
small caliber is realized on a deflected defect
image based on a
ray tracing method. According to the invention, high-efficiency detection can be carried out, the problem of slow
rhythm of existing equipment is solved, and the detection efficiency is improved by dozens of times on the original basis. According to the invention, high-precision on-line detection of small-
diameter inner wall defects by enterprises is realized, and the production efficiency is improved.