摘要
针对环形或链式工程图提出了基于模式分解和符号匹配的特征识别方法。首先采用凸线模式分解原则和凸共线元素对最小序号优先模式分解原则将图形分解为由单个特征组成的图形子模式 ,并采用具有几何变换不变性编码规则——基于角度的编码 ,实现对图形子模式和特征的符号描述 ,通过符号匹配方法鉴别出零件的形状特征。该方法已应用于三牙轮钻头特征识别系统中。
A feature recognition method for annular or catenary graph was proposed, which is based on decomposition of model and matching of symbol. The graph is firstly decomposed to sub graph by decomposition rule of convex curves and rule of pairs of convex co linear elements ,then sub graph and feature definition is transformed to string by introducing an angle based coding rule. Hereto ,the form feature in graph could be identified by symbol matching. This method possesses invariability in geometrical transforming and have been used to feature recognition system for drawing of rock bit.
出处
《机械科学与技术》
CSCD
北大核心
2000年第5期845-848,共4页
Mechanical Science and Technology for Aerospace Engineering
基金
国家 8 63 / CIMS应用示范工程
关键词
形状特征
特征识别
模式分解
符号匹配
工程图
Form feature
Feature recognition
Model decomposition
Symbol matching
