从CAD图形中提取工艺信息的方法摘要本文将针对当前各个生产单位的工程CAD图纸的不同模式及其现有系统单一功能的缺点，提出支持多模式CAD信息智能提取算法。以DPM技术为基础，进而提出构筑CAD/CAM/CAPP集成系统的模型。在此将主要讨论CAD模板的定义，信息的提取算法，CAD数据与PDM数据交换，以及集成系统的模型和实现等问题。关键词：信息提取PDMCAD/CAM/CAPP集成系统AbstractThispaperwillaimatdifferentmodelengineeringCADofeveryunitofproduetionandthedefectofsinglenessfunctioninexistencesystem，presentthealgorithmofsupportingmulti-modelextractinginformationfromCADintelligenly,furtherpresentconstructingthemodelofCAD/CAPP/CAMintegratedsystemonthebasisofPDMtechnology.InherewemainlydiscussthedefinitionofmodelandthealgorithmofdataextractionandthedataexchangebetweenCADandPDM，finallydiscusstheinstanceaboutabove，thenpresentamodelaboutsystemintegration.Keywords：InformationExtraction,PorductDataMnagaement，CAD/CAM/CAPP，lntegrationSystem目录第一章绪论.............................................................................................................................51.1引言.....................................................................................................................................51.2工程CAD图信息智能提取的研究综述...........................................................................61.3本文研究的主要内容.........................................................................................................7第二章表格文档的逻辑结构与数据提取算法.....................................................................82.1文档表格的基本结构.........................................................................................................82.2标题栏数据栏间的依赖关系...........................................................................................102.3基本表格和数据栏区域构成的矩形模型.......................................................................102.4逻辑结构提取方法...........................................................................................................112.5逻辑结构提取算法改进一数据栏矩形区域投影算法...................................................14第三章多模式CAD图纸信息智能提取与回写技术........................................................173.1典型CAD图纸模板及表结构的定义.............................................................................173.2CAD图纸表格的语义关联约束.....................................................................................193.3CAD图纸自由表格的矩阵表示.....................................................................................223.4CAD图纸子表提取方法.................................................................................................24第四章CAD智能提取系统与信息共享应用实例模型.....................................................294.1支持多模式CAD智能提取系统实例.............................................................................294.2基于PMD为核心的系统整合模型................................................................................38第五章结论...........................................................................................................................43参考文献.................................................................................................................................44致谢..................................................
