Method for detecting groove profile precision of crossed roller guide rail

The invention relates to the field of crossed roller guide rail precision detection, and particularly discloses a crossed roller guide rail groove profile precision detection method, which comprises the following steps of: placing a group of standard measuring balls with the same size in a guide rail V-shaped groove; the industrial camera shoots a grayscale image of the guide rail with the standard measuring ball; edge pixels of the standard measuring ball and the guide rail reference surface are obtained through image processing; performing arc fitting and straight line fitting on the edge pixels; and solving the straightness and parallelism of the guide rail groove profile. The invention provides a non-contact automatic detection method based on machine vision for high-precision detection of the crossed roller guide rail groove profile, and the straightness of the guide rail groove profile and the parallelism of the groove profile relative to the guide rail bottom surface reference surface and the guide rai