Research on Automatic Dimensioning of the Engineering Drawing Based on CBR

2018 4th International Conference on Environmental Science and Material Application

生态环境科学;材料科学

Sun, Dongyang^1 ; Yanping, H.^1

Dalian University of Technology, DaLian, LiaoNing

116024, China^1

关键词: Automatic dimensioning;    Case library;    Engineering drawing;    Geometric structure;    Topological structure;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/252/5/052118/pdf
DOI  :  10.1088/1755-1315/252/5/052118

来源: IOP

【 摘 要 】

In this paper, we describe a novel automatic dimensioning method. The method redefines the characteristics of graphics output primitive and determines the position and type of dimension in new drawings by comparing them with similar engineering drawings which with dimension. Firstly, redefining graphics output primitive so that each graphics output primitive has its own unique attributes, creating dimension templates and each template consists of three parts: the dimension object, the dimension type, and the dimension placement point. Secondly, finding the case that is most similar with the topological structure, geometric structure, and expression function of the new drawing from the case library. At the end, by making a match with the case select from case library to determine the dimension object, dimension type, dimension value, and dimension placement point in the new drawing. Our early experiments show that the presented theory has a good usability.