High Precision Parameter Measurement of the Machined Workpiece based on 3D Point Cloud

Workpieces are the basic components of aerospace, shipbuilding, power supply, and other industries. The measurement of the geometric parameters of the workpiece is not only the basis for ensuring the manufacture of various products but also the premise of stable and safe production. With the rapid development of optoelectronic technology, automation, and digital technology, the improvement of efficiency and accuracy of workpiece parameter measurement has gradually become the main problem. In this paper, the geometric parameter measurement method of the workpiece based on 3D point cloud is proposed, and a measurement system framework that combines optical measurement and a high-precision mechanical platform is constructed to realize the construction of a 3D point cloud in the area of the processed workpiece. The wrong noise points are eliminated by clustering, and the key area model of the workpiece is fitted to realize the high-precision measurement of geometric parameters. Through the experimental verification, in the experimental environment of this paper, the measurement accuracy of the method in this paper can reach up to $0.2 \mathrm{~mm}$, which can meet the actual use conditions.