3D printing impeller online contour measurement method based on contact probe

The invention relates to the technical field of precision measurement, and discloses a 3D printing impeller online contour measurement method based on a contact probe, and the method comprises a pedestal, the top of the pedestal is fixedly connected with an operation mechanism, and the top of the pedestal is provided with a positioning mechanism; the positioning mechanism comprises a T-shaped groove, the T-shaped groove is formed in the top of the base, a T-shaped block is slidably connected to the inner side of the T-shaped groove, a fixing platform is fixedly connected to the top of the T-shaped block, a threaded rod is fixedly connected to the top of the fixing platform, and the outer surface of the threaded rod is sleeved with an impeller. According to the 3D printed impeller online contour measurement method based on the contact probe and the online measurement system, secondary positioning errors during subsequent impeller machining are avoided, the surface coordinate parameters of a 3D printed piece ca