摘要
从工程图样的图样信息度入手,依据投影关系语义或尺寸约束语义,在基于预先获取表达方式语义的基础上,将其细分为图形信息度、尺寸信息度、尺寸约束信息度。在工程图样数据的预处理基础上,从图元的图线种类、线型、拓扑信息入手,建立反映图形信息度的编码模型;从尺寸四要素所体现的形体形状特征与位置关系入手,建立反映尺寸信息度的编码模型;从尺寸与图元特征约束点的约束关系入手,建立反映尺寸约束信息度的编码模型。这可为应用编码技术理解计算机工程图样奠定一定基础。
According to projection relation language or dimension constraint language, this paper divides the pixel information of engineering drawings into graphic information measure, dimension information measure and dimension constraint information measure, based on the expression mode obtained in pre-processing, with which, according to line category, line type and topological information of drawing elements, coding models for graphic information are established. According to the body shape characteristics and the position relations, embodied by four main factors of dimensions, the coding model for dimension information is established; according to constraint relations of characteristic constraint dots of dimensions and drawing elements, the coding model for dimension constraint information is established. All these provide for the computer some understanding with respect to engineering drawings.
出处
《科技导报》
CAS
CSCD
2008年第10期79-82,共4页
Science & Technology Review
