摘要
提出一种基于形状拆分的机械零件三维模型检索方法。首先根据零件名称和功能,将机械零件模型库按传统方式划分为四大类,即轴套类、盘盖类、叉架类和箱体类,三维模型之间的匹配在同一类模型中进行;随后进行三维模型外轮廓扫描,将整个三维模型拆分成若干平面体、回转体和曲面体,根据同一型体之间特征数量和参数的不同,进行单一型体之间的匹配;最后根据单一型体的数量和匹配对的相似度,综合计算整个模型的相似度。单一型体的定义和整个匹配算法均是围绕着形状和工艺相似进行的。通过实例验证了该方法的有效性。
A 3D model retrieval method of mechanical parts based on shape split was proposed. Firstly, according to the name and function of the parts, the mechanical parts model library was divided into four categories with the traditional way： the shaft-like parts, the plate-like parts, the fork-like parts and the box-like parts, the matching between the two 3D models was completed in the same category. Then, scanning the outer contour of 3D models with the computer and dividing one 3D model into several sub-models, such as plane solids, revolved solids or curved solids, the matching between the two sub-models was calculated with the quantity of the features and the values of feature-parameters at the same kind of sub-models. Finally, the similarity degree of the whole model is computed synthetically with the numbers of sub-models and similarity degrees of the matching between the two sub-models. The definition of sub-models and the whole matching algorithm were determined by the similar shapes and process. A case study was used to reveal the effectiveness of this method.
出处
《图学学报》
CSCD
北大核心
2015年第1期35-40,共6页
Journal of Graphics
基金
上海市教育委员会科研创新一般资助项目(13YZ071)
国家自然科学基金资助项目(51375314)
关键词
形状拆分
模型检索
机械零件
单一型体
相似度
shape split
model retrieval
mechanical parts
sub-model
similarity degree
