Papers by Author: Tie Li Ye

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Authors: Tie Li Ye, Lu Ling An, Li Gao, Qing Liang Zeng
Abstract: Constraint-based model reconstruction is one of the key research problems in recent reverse engineering. Surfaces of structural parts are mostly quadratic and have mutual constraints. Aiming at this feature, the paper proposes a method for conducting constraint-based synchronous fitting on multiple surfaces. Synchronous fitting is carried out through constraint optimization method, the constraints among surfaces can be maintained and the original design intents incarnated.
Authors: Tie Li Ye, He Li, Qing Liang Zeng
Abstract: Based on the preprocessed measuring data, this paper proposes a method for identification and reconstruction of regular curves and surfaces including straight line(segment), circle(arc), four-sided plane and right cylindrical surface. Considering the geometric feature of each kind of regular curve or surface, the paper studies the corresponding algorithm for identifying the curve or surface point set, reconstructs the curve or surface and gives the parameter equation.
Authors: Tie Li Ye, Xue Yi Li, Qing Liang Zeng
Abstract: This paper studied the fine registration techniques of measuring data of complex product and proposed a new registration method based on triangle constraint. Firstly, the paper made a research on specifying the proper measuring reference points and the setting of reference coordinate system, and afterwards proposed a fine registration algorithm of measuring data, Which is about realizing the fusion of reference coordinate system based on the congruent judgment of reference triangle and fulfilling precise match of data with measuring error on the basis of controlling the rotation of data blocks and minimizing the registration error.
Authors: Tie Li Ye, Lu Ling An, Li Gao, Min Wu
Abstract: The key technologies for generating sketch contours are researched on which the features such as extrusion, revolution and sweeping are reconstructed. First the planar data points are arranged in sequence by improved least distance arrangement algorithm. The feature points are extracted in terms of estimated curvatures and their changes. The types of feature points are identified by use of Adaptive K-Curvature Function. The types of planar curves are judged by Projective Height Function. On basis of feature point treatment the dividing points to segment curves are determined, which provides the foundation for constraint-based reconstruction of sketch contours in reverse engineering.
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