Dynamic quantitative measurement method and device for coaxiality and planeness of spiral conveying system

The invention discloses a dynamic quantitative measurement method and device for coaxiality and planeness of a spiral conveying system. A laser source and a visual detection system are respectively arranged at an input end and an output end of the spiral conveying system; a laser incident point control disc is arranged at the tail end of a standard sample pipe; a light target is arranged at the forward end of the standard sample pipe; three light-emitting diodes are arranged on the light target, are distributed to form a right angled isosceles triangle, and are equidistant to the center of a circle; laser optical axes pass through the incident point control disc, and are projected on the light target; when a steel pipe is fed in a spiral manner, an image acquisition sensor is adopted to be aligned to a regular acquisition target image of a forward-end light target; an image processing technology is introduced to extract the center of the circle of a 'luminous arc' formed by rotating the light emitting diodes