基于三维骨架细化的金属橡胶三维建模方法研究  

Research on 3D Modeling Method of Metal Rubber Based on 3D Skeleton Refinement

作　　者：黄明吉[1,2] 李斌 董秀萍[3] HUANG Mingji;LI Bin;DONG Xiuping(School of Mechanical Engineering,University of Science and Technology Beijing,Beijing 100083,China;Shunde Graduate School of University of Science and Technology Beijing,Shunde 528399,Guangdong,China;School of Artificial Intelligence,Beijing Technology and Business University,Beijing 100048,China)

机构地区：[1]北京科技大学机械工程学院,北京100083 [2]北京科技大学顺德研究生院,广东顺德528399 [3]北京工商大学人工智能学院,北京100048

出　　处：《材料导报》2022年第1期174-178,共5页Materials Reports

基　　金：国家自然科学基金(51975042)。

摘　　要：基于CT断层扫描技术的逆向建模为金属橡胶的三维建模提供了一条有效的途径,但由于金属橡胶丝之间的勾连接触,使得三维模型中金属丝之间存在粘连,从扫描图像上表现为部分金属丝截面相互粘连。为解决粘连分割问题,首先采用基于标记的分水岭算法对截面中相对简单的粘连进行分割处理,然后根据金属橡胶丝直径不变的几何结构特征,利用三维图像骨架细化算法提取出金属丝的轴线坐标,最后在CAD系统中利用扫掠算法重构金属橡胶三维模型。实验结果证明,该方法不仅可以有效实现金属橡胶的逆向三维建模,为金属橡胶三维仿真计算、数字制造提供三维数字模型,还可以通过改变金属丝直径或删减部分金属丝构建不同孔隙度的金属橡胶,为金属橡胶的有限参数化建模提供一种新的思路。The reverse modeling based on CT tomography technology provides an effective way for the three-dimensional(3D)modeling of metal rubber.However,due to the hooking and contact between the metal rubber wires,the 3D model has metal wire adhesion problems.From the scanned image,there are adhesions between part of the metal wire.In order to solve the adhesion segmentation problem,the marker-based watershed algorithm is adopted to deal with relatively simple adhesions in the cross section firstly,and then the axis coordinates of the wire are extracted by the 3D image skeleton thinning algorithm according to the geometric structure characteristics of the metal rubber wire diameter constant.Finally the 3D model of the metal rubber is reconstructed by using the sweep algorithm in the CAD system.Experimental results prove that this method can not only effectively realize the reverse 3D modeling of metal rubber and provide 3D digital models for metal rubber 3D simulation calculation and digital manufacturing,but also construct different porosities by changing the diameter of the metal wire or deleting part of the metal wire.The metal rubber provides a new idea for the limited parametric modeling of metal rubber.

关 键 词：金属橡胶 CT扫描 三维重构 图像分割 三维细化 

分 类 号：TG146[一般工业技术—材料科学与工程]