基于特征的圆锥体逆向测量与参数建模
魏晓玲，姚进*，刘慧兰
（四川大学 制造科学与工程学院，四川 成都 610065）
摘要：在三坐标逆向测量过程中，圆锥体测量点数量的选取过多会延长逆向时间，选取过少会影响特征参数的准确性，并且最终逆向出来的B-REP实体模型难以进行参数化编辑。因此，针对圆锥体逆向过程测量快速化、特征准确化及模型参数化的逆向要求，提出一种基于特征的圆锥体逆向测量与参数建模法。首先，综合圆锥体的半顶角、轴线向量、轴高以及顶点等特征参数，在保证精度的条件下，确定了获得圆锥体特征参数的最少测量点数及其具体分布位置。然后，结合MATLAB、VB、SolidWorks软件来处理测量数据，依据计算结果进行参数化建模。最后，通过试验验证了该方法的有效性。该方法无需找正，具有一定的实用性，参数化建模方便了逆向优化设计。
关键词：圆锥体；逆向测量；参数建模
中图分类号：TP391.4 文献标志码：A doi：10.3969/j.issn.1006-0316.2019.05.010
文章编号：1006－0316 (2019) 05－0047－05
Reverse Detection and Modeling Method of Parts Based on Voxel
WEI Xiaoling，YAO Jin，LIU Huilan
( Institute of Manufacturing Science and Engineering, Sichuan University, Chengdu 610065, China )
Abstract：In the process of three-coordinate reverse measurement, too many points of cone measurement will prolong the reverse time, too few points will affect the accuracy of feature parameters, and the final B-REP entity model is difficult to parametric edit. Therefore, in order to meet the reverse requirements of fast measurement, accurate feature and parameterization of the model in the process of cone inversion, a method of cone inversion measurement and parameter modeling based on feature is proposed. Firstly, by synthesizing the characteristic parameters of the cone, such as the half-apex angle, axis vector, axis height and vertex, the minimum measuring points and their specific distribution positions are determined under the condition of ensuring the accuracy. Then, the measurement data are processed with the software of MATLAB, VB and SolidWorks, and the parameterized model is built according to the calculation results. Finally, the validity of the method is verified by experiments. The parametric modeling facilitates the reverse optimization design.
Key words：cone；reverse measurement；parametric modeling
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收稿日期：2018－11－26
作者简介：魏晓玲（1993－），女，四川成都人，硕士，主要研究方向为计算机辅助及信息工程。*通讯作者：姚进（1958－），男，四川成都人，博士，教授、博士生导师，主要研究方向为逆向工程、机器人及其机构学。
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