工程图纸存档与通信系统的研究

文章提出了工程图纸存档与通信系统（Drawing Archiving and Communication System,DACS)的概念,并提出了一个以基于网络的数据库为核心的具体的系统结构,使不同格式的图纸与其相关文档能以统一的形式在数据库中存档和进行处理、传输、并重点讨论了DACS中的几个关键问题。     

计算机图纸与化工设备管理系统的设计与实现

文章从系统总体结构、功能设计、模块划分、关键实现技术以及系统的安全性等方面介绍了AutoCad图纸与化工设备管理系统的设计思想与实现技术,该系统采用OLE嵌入技术,实现了BLOB变量在数据库存取、网络传输以及在数据库应用程序中的图纸无级缩放,彻底解决了图纸的图形信息与信息系统的数据信息的无缝链接。     

基于AutoCAD的计算机辅助设计、绘图及图纸管理系统的开发

本文提出了基于AutoCAD的计算机辅助设计、绘图及图纸管理系统的开发方法。系统包括符合国家标准的绘图平台、基于事物特性表的标准件库、面向合理化工程的图形单元和面向信息集成的图纸管理四个模块。原型系统采用Visual C ，ObjectARX（包括ADS）编程实现。     

电气铁路图纸管理系统

介绍了利用ＡｕｔｏＣＡＤＲ１４软件开发的电气化铁路图纸管理系统的设计过程,该系统具有铁路牵引供电系统设计绘图的功能,并且可以实现图纸从供电段、分上至路局逐级上报。系统采用ＡｕｔｏＬＩＳＰ语言编程,包括接触网和变电所图纸帽、图纸传输和接收,主要模块有文件操作、基本图形绘制、自动布柱、建立连接、模板设计、元件库等,其中详细介绍了系统的工作原理,系统菜单的建立,区间布柱的设计思路和元件库的建立过程,最后     

基于Web面向AutoCAD图纸管理的产品数据管理系统

本文介绍了基于Web、面向图纸的小型产品数据管理系统的体系结构、数据组织和实现技术等。该系统以产品结构树为核心，实现了AutoCAD图纸信息的自动采集与产品数据库数据的同步管理功能。设计人员可对设计图纸、零部件数据实现网上共享。     

清华图纸自动输入及管理系统

清华图纸自动输入及管理系统ＴＨ－ＤＡＩＭＳ２．０是一个面向图纸复用和图纸档案管理的软件产品，采用纯图象处理方法．在２．０版本中，线条拾取技术缩短了用户交互修改和设计图纸的时间；线条光滑技术，改善了图纸的质量；内存空间动态映象技术，提高了处理大幅面高精度图纸的能力；合理的图纸数据库系统结构，方便了用户的使用和维护；中文用户界面，更适合我国的广大用户；多样化系统构成，适合大中小各种工矿企业．文章先简要介绍ＴＨ－ＤＡＩＭＳ２．０的功能和特点，再着重叙述２．０版采用的一些新技术．     

产品图纸异地同步与实时协作设计系统研究

从制造业企业联盟生产实际出发，分析了异地设计、异地制造产品图纸同步与实时协作设计的客观需求，研究了产品图纸异地同步与实时协作设计系统应具有的功能，提出了以虚拟专用网(VPN)为物理平台、基于Web的图纸数据同步更新和基于网络黑板的实时协作设计解决方案，讨论了实现该方案的组成结构及关键技术，总结了该方案的特点。     

汽车线束图纸辅助绘制系统的设计与实现

线束图纸是线束生产必不可少的指导工具，如何快速、直观地绘制出线束图纸一直是线束生产企业需要重点解决的难题。该系统基于ObjectARX2007开发包，以SQLServer2005为后台数据库，设计并实现了一个汽车线束图纸辅助绘制系统。目的是通过人机交互的方式辅助线束工艺人员绘制线束图纸，减轻线柬工艺人员的劳动量，提高线束设计的效率。本文对该系统的特点，数据库设计，系统的构架及其实现进行了详细的描述。     

基于知识的机械图纸理解系统

本文提出了一个基于知识的机械图纸理解系统（ＭＤＩＳ），它运用了大量由规则和过程表示的机械图纸识别与理解知识，并采用一个自底向上与自顶向下相结合的混合推理机制，较好地实现了对机械图纸的识别与理解。     

CAD图纸可视化数字签名系统的研究与实现

CAD图纸可视化数字签名系统中,图纸的完整性保护极为重要.从可能改变图纸的保存命令出发,通过截获保存命令设计了一个图纸完整性保护方案,并以图形软件AutoCAD2005为栽体,编程实现了可视化数字签名系统中CAD图纸图形信息的过滤计算,然后用数字签名技术的解密算法来验证图形数据的一致性,确保了CAD图纸在可以被有条件改...     

A new recognition model for electronic architectural drawings

Current methods for recognition and interpretation of architectural drawings are limited to either low-level analysis of paper drawings or interpretation of electronic drawings that depicts only high-level design entities. In this paper, we propose a Self-Incremental Axis-Net-based Hierarchical Recognition (SINEHIR) model for automatic recognition and interpretation of real-life complex electronic construction structural drawings. We design and implement a series of integrated algorithms for recognizing dimensions, coordinate systems and structural components. We tested our approach on more than 200 real-life drawings. The results show that the average recognition rate of structural components is about 90%, and the computation time is significantly shorter than manual estimation time.     

机械图纸集成化管理系统设计

介绍了一个面向对象的机械图纸集成化管理系统，详细论述了系统的总体设计思想，各大子系统的功能及它们之间的数据共享关系，并提供程序实现的主要代码。     

基于免疫遗传算法的工程图自动调优技术

针对目前三维模型参数化变型后,工程图自动生成方法中出现的视图布局 不合理、比例失调、标注混乱等问题,及现有调图技术的局限性,论文提出采用免疫遗传算 法对工程图进行优化调整。实现了基于模板参数化驱动后工程图的自动更新与视图布局、视 图比例及其各种标注位置等的优化调整。实验证明该方法可以实现智能化快速出图,保证设 计的准确性,提高设计效率和质量。     

工程设计中多图联动建模技术的研究与应用

工程设计中多图联动建模技术提供用户友好的工程设计空间,建立了工程原理图和多个工程布置图之间的信息关联。采用3D数据存储——2D图形可视转换技术,得到图形变换矩阵。把设备的各个视图的图块预存入图形库中,绘图时,设置相应的绘图图层,只要在布置图的一个视图中插入设备图,系统会在其他视图中自动插入相应的投影图形,并且当修改或者删除一个视图中的图形时,其他视图对应的图形也会自动完成相应的操作,实现了多个工程视图的联动。     

A single solution method for converting 2D assembly drawings to 3D part drawings

Although solid models play a central role in modern CAD systems, 2D CAD systems are still commonly used for designing products without complex curved faces. Therefore, an important task is to convert 2D drawings to solid models, and this is usually carried out manually even in present CAD systems. Many methods have been proposed to automatically convert orthographic part drawings of solid objects to solid models. Unfortunately, products are usually drawn as 2D assembly drawings, and therefore, these methods cannot be applied. A further problem is the difficult and time-consuming task of decomposing 2D assembly drawings into 2D part drawings. In previous work, the authors proposed a method to automatically decompose 2D assembly drawings into 3D part drawings, from which 2D part drawings can be easily generated. However, one problem with the proposed method was that the number of solutions could easily explode if the 2D assembly drawings became complex. Building on this work, here we describe a new method to automatically convert 2D assembly drawings to 3D part drawings, generating a unique solution for designers regardless of the complexity of the original 2D assembly drawings. The only requirement for the approach is that the assembly drawings consist of standard parts such as bars and plates. In 2D assembly drawings, the dimensions, part numbers and parts lists are usually drawn, and the proposed method utilizes these to obtain a unique solution.     

滚子链传动CAD程序设计

本文介绍滚子链传动ＣＡＤ系统的程序设计，以及链轮零件图绘制等内容。主要阐明链传动设计计算程序设计的理论根据和基本方法，链轮零件图图形处理方法，实现了链传动设计计算过程和绘制链轮零件图的一体化过程。     

Solid model reconstruction from engineering paper drawings using Genetic Algorithms

The wide applications of CAD/CAM technologies have promoted the development and application of many advanced technologies, such as digital manufacturing, rapid prototyping, enterprise resources planning, computer integrated manufacturing, concurrent engineering, virtual reality, and mass customization. These advanced technologies all need to be supported by three-dimensional (3D) solid models of products. Most enterprises, however, still organize their production using 2D paper drawings, which makes difficulties for the application of these advanced technologies. It is needed to convert engineering paper drawings into 3D solid models for applications. Based on holo-extraction of information from paper drawings, this paper develops a systematic 3D reconstruction method, which simulates an experienced human designer's thinking mode in transforming inaccurate outlines with inaccurate projection relationships in 2D drawings into 3D image, with the aid of Genetic Algorithms.     

利用单元格和特征点实现图纸信息的自动提取

工程图中的标题栏和明细栏是产品数据集中管理的重要数据来源．出于重用CAD数据的考虑,提出了一种有效的工程图零部件信息提取方法．通过分析工程图中标题栏和明细栏的形式,从宏观布局和微观结构出发归纳了表格的位形特征;提出了基于单元格和特征点的图纸数据自动提取策略,详细介绍了算法思想和实施步骤;开发了实用程序并在工程项目中得到应用．     

Straight-Line Drawing Algorithms for Hierarchical Graphs and Clustered Graphs

Hierarchical graphs and clustered graphs are useful non-classical graph models for structured relational information. Hierarchical graphs are graphs with layering structures; clustered graphs are graphs with recursive clustering structures. Both have applications in CASE tools, software visualization and VLSI design. Drawing algorithms for hierarchical graphs have been well investigated. However, the problem of planar straight-line representation has not been solved completely. In this paper we answer the question: does every planar hierarchical graph admit a planar straight-line hierarchical drawing? We present an algorithm that constructs such drawings in linear time. Also, we answer a basic question for clustered graphs, that is, does every planar clustered graph admit a planar straight-line drawing with clusters drawn as convex polygons? We provide a method for such drawings based on our algorithm for hierarchical graphs.     

AutoCAD快速绘图技巧

随着计算机日益普及,机械图样越来越多地使用计算机绘制,且企业中机械图样普遍使用AutoCAD平面绘图软件绘制,如何提高制图员的绘图速度显得尤为重要。本文介绍AutoCAD使用技巧,对制图员提高绘图速度有一定的帮助,对制图教师、AutoCAD培训教师也有一定的指导意义。