Evaluation of Uncertainty in Nonlinear Planar Distance Measurement based on Coordinate Measuring Machines

According to the measurement method of nonlinear planar distance based on coordinate measuring machine (CMM), establish a black box evaluation model for the uncertainty of CMM nonlinear planar distance measurement, and analyze the sources of each uncertainty. Combining measurement examples, this paper elaborates on the uncertainty evaluation process of nonlinear planar distance measurement based on CMM, calculates the extended uncertainty of nonlinear planar distance measurement based on CMM, and provides a reference for the uncertainty evaluation of nonlinear planar distance measurement based on CMM.