逆向重建中B样条曲面过渡/微调精简方法
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摘要
为提高逆向工程中点云数据精简与重构的精度和效率,改进B样条曲面拟合在曲率精简和曲面重构中的应用问题.对逆向工程中的3维扫描技术、3维设计、点云数据的精简及模型重构做了深入细致的应用研究.提出一种基于B样条曲面过渡/微调精简算法,将该研究应用于叶轮的逆向制造中,通过3维扫描获得曲面重构点云数据,将点云数据合理拼合封装与精简,进行曲面重建和3维再设计,同时分析产品的光顺性和精度,并利用快速成型机打印出产品模型样件.研究结果表明该方法既高效提高了曲面建模效率,又改善了逆向建模精度.
In order to improve the accuracy and efficiency of the reduction and reconstruction of point cloud data in reverse engineering,the application of B spline surface fitting in curvature reduction and surface reconstruction was improved.The 3 Dscanning technology,3 Ddesign,point cloud data simplification and model reconstruction in reverse engineering were applied and studied in depth and detail.A reduction algorithm based on B-spline surface transition/fine tuning was proposed.The research was applied to reverse manufacturing of impeller.Point cloud data can be reconstructed by 3 Dscanning,and the point cloud data can be encapsulated and simplified reasonably.Surface reconstruction and 3 D redesign were carried out,and the smoothness and precision of the product were analyzed at the same time.Finally,the product model sample was printed out by the rapid prototyping machine.The research results show that the proposed method not only improves the efficiency of surface modeling,but also improves the accuracy of inverse modeling.
In order to improve the accuracy and efficiency of the reduction and reconstruction of point cloud data in reverse engineering,the application of B spline surface fitting in curvature reduction and surface reconstruction was improved.The 3 Dscanning technology,3 Ddesign,point cloud data simplification and model reconstruction in reverse engineering were applied and studied in depth and detail.A reduction algorithm based on B-spline surface transition/fine tuning was proposed.The research was applied to reverse manufacturing of impeller.Point cloud data can be reconstructed by 3 Dscanning,and the point cloud data can be encapsulated and simplified reasonably.Surface reconstruction and 3 D redesign were carried out,and the smoothness and precision of the product were analyzed at the same time.Finally,the product model sample was printed out by the rapid prototyping machine.The research results show that the proposed method not only improves the efficiency of surface modeling,but also improves the accuracy of inverse modeling.
引文
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[2]张倩,吴凤林.逆向工程在产品设计中的实践研究[J].制造业自动化,2014,36(6):83-85.Zhang Qian,Wu Fenglin.The practice research on reverse engineering in the product design[J].Manufacturing Automation,2014,36(6):83-85.(in Chinese)
[3]Mian S H,Manna M,Ahmari A.Accuracy of a reverse engineered mould using contact and non-contact measurement techniques[J].International Journal of Computer Integrate Manufacturing,2015,28(5):419-436.
[4]徐龙,王柱,刘爱明,等.基于激光扫描的逆向工程在检验检测中的应用[J].制造业自动化,2014,36(11):36-37.Xu Long,Wang Zhu,Liu Aiming,et al.Based on laser scanning of the reverse engineering application in the examination[J].Manufacturing Automation,2014,36(11):36-37.(in Chinese)
[5]刘丹,钱应平,易国锋,等.逆向工程中点云处理及拟合新方法的研究[J].机械设计与制造,2015(3):55-57.Liu Dan,Qian Yingping,Yi Guofeng,et al.The research of point cloud processing and fitting methods in reverse engineering[J].Machinery Design&Manufacture,2015(3):55-57.(in Chinese)
[6]周明泉,李璨,解国栋,等.基于三维模型的考古线图提取方法[J].北京理工大学学报,2018,38(7):286-291.Zhou Mingquan,Li Can,Xie Guodong,et al.Extraction method of archaeological line craph based on 3Dmodel[J].Transactions of Beijing Institute of Technology,2018,38(7):286-291.(in Chinese)
[7]Wang Shigang,Yan Yong,Wang Fengjuan,et al.Based on reverse molding technology of the impeller of the fluid dynamics analysis[J].Journal of Computational Methods in Sciences and Engineering,2015,15(2):183-192.
[8]周小东,成思源,杨雪荣.面向创新设计的逆向工程技术研究[J].机床与液压,2015,43(19):25-28.Zhou Xiaodong,Cheng Siyuan,Yang Xuerong.Study of reverse engineering technology oriented to innovative design[J].Machine Tool&Hydraulics,2015,43(19):25-28.(in Chinese)
[9]周煜,张万兵,杜发荣,等.散乱点云数据的曲率精简算法[J].北京理工大学学报,2010,30(7):785-789.Zhou Yu,Zhang Wanbing,Du Farong,et al.Algorithm for reduction of scattered point cloud data based on curvature[J].Transactions of Beijing Institute of Technology,2010,30(7):785-789.(in Chinese)