产品MBD数据集三维标注的自动校验与实现  

Automatic verification and realization of MBD data set 3D annotation

作　　者：王洪申[1] 王道俊 WANG Hong-shen;WANG Dao-jun(College of Mechano-Electronic Engineering, Lanzhou Univ.of Tech., Lanzhou 730050, China)

机构地区：[1]兰州理工大学机电工程学院,甘肃兰州730050

出　　处：《兰州理工大学学报》2021年第2期48-53,共6页Journal of Lanzhou University of Technology

基　　金：国家自然科学基金(61962035)。

摘　　要：针对目前商用CAD软件中MBD功能三维标注缺乏正确性校验问题,基于OpenCASCADE几何造型内核研究了三维尺寸标注与标注有效性检查的问题.通过提取被标注对象的几何特征,结合信息标注规则,判断用户标注内容与标注对象间的匹配性,进而判断标注的正确性,增加了系统三维尺寸标注的智能性.设计了分层数据结构存储标注信息,并将标注信息与形体要素相关联,避免了三维标注中重复标注的现象,也为后续的产品虚拟装配、加工制造以及产品服役中产品语义信息的自动化提取提供可能.将标注信息以XML格式储存,便于信息的传输和访问,为进一步研究产品的数字孪生技术打下良好的基础.In view of the lack of correctness verification of MBD function 3D annotation in commercial CAD software at present, this paper studies the problems of 3D dimension labeling and validation inspection based on the geometric modeling core of OpenCASCADE. By extracting the geometric features of the annotated object and combining the information annotation rules, the matching between the annotated content and the annotated object is judged, and then the correctness of the annotation is judged. The hierarchical data structure is designed to store the annotation information, and the annotation information is associated with the shape elements, which avoids the repetitive annotation, and also provides the possibility for automatic extraction of product semantic information during subsequent virtual assembly, processing and manufacturing and service. The annotated information is stored in XML format, which is convenient for information transmission and access, which lays a good foundation for further research on digital twin technology.

关 键 词：三维标注 MBD 正确性校验 OPENCASCADE 

分 类 号：TH124[机械工程—机械设计及理论] TP391.72[自动化与计算机技术—计算机应用技术]