title: Reverse engineering of free-form surface based on the closed-loop theory.
abstract: To seek better methods of measurement and more accurate model of reconstruction in the field of reverse engineering has been the focus of researchers. Based on this, a new method of adaptive measurement, real-time reconstruction, and online evaluation of free-form surface was presented in this paper. The coordinates and vectors of the prediction points are calculated according to a Bézier curve which is fitted by measured points. Final measured point cloud distribution is in agreement with the geometric characteristics of the free-form surfaces. Fitting the point cloud to a surface model by the nonuniform B-spline method, extracting some check points from the surface models based on grids and a feature on the surface, review the location of these check points on the surface with CMM and evaluate the model, and then update the surface model to meet the accuracy. Integrated measurement, reconstruction, and evaluation, with the closed-loop reverse process, established an accurate model. The results of example show that the measuring points are distributed over the surface according to curvature, and the reconstruction model can be completely expressed with micron level. Meanwhile, measurement, reconstruction and evaluation are integrated in forms of closed-loop reverse system.
authors: Department of Jiangsu Province Key Laboratory of Advanced Food Manufacturing Equipment and Technology, Jiangnan University, Wuxi 214122, China ; School of Mechanical Engineering, Jiangnan University, Wuxi 214122, China.
authors: Xue Ming
authors: XM
authors: He
authors: School of Mechanical Engineering, Jiangnan University, Wuxi 214122, China.
authors: Jun Fei
authors: JF
authors: He
authors: Department of Jiangsu Province Key Laboratory of Advanced Food Manufacturing Equipment and Technology, Jiangnan University, Wuxi 214122, China ; School of Mechanical Engineering, Jiangnan University, Wuxi 214122, China.
authors: Mei Ping
authors: MP
authors: Wu
authors: School of Science, Jiangnan University, Wuxi 214122, China.
authors: Rong
authors: R
authors: Zhang
authors: School of Mechanical Engineering, Jiangnan University, Wuxi 214122, China.
authors: Xiao Gang
authors: XG
authors: Ji