Because the style and structure of information which is required by cad , capp and cam is different , it is very difficult to realize integration between these systems . cad system ' s work is to design a part , and the information about this part is determinate . however , the information cannot be used smoothly by capp and cam system for the information description method about a part in different system is different Cad系统作为零件设计环节，一般来说，所设计零件的结构、精度信息在该系统中已确定，但是，由于cad系统对零件信息特有的表达形式，这些信息并不能被capp 、 cam等系统直接识别利用，后续系统只有通过对这些信息重新进行归类、识别，然后才能实现共享和利用。
In this article , through using oobject - oriented technique , and on the base of deep investigation of second develop technique of autocad r14 , we roughly realize the integration of feature - based design and manufacturing of circumgyrated part . by using object - oriented language visual c + + and objectarx as develop tool , and by using access 2000 database as background support , we roughly realize the system of feature - based design and manufacturing of circumgyrated part , thus realizing the integration of cad / capp / cam efficiently 本论文运用面向对象的技术，通过对autocadr14二次开发技术的深入研究，基本实现了基于特征的回转体零件设计、制造的一体化；采用面向对象的编程语言visualc + + 6 . 0和objectarx作为开发工具，并以access2000数据库作为后台支撑，初步建立了一个基于特征的回转体零件设计和制造系统，从而实现了cad capp cam的有效集成。
Computer aided design ( cad ) , is a kind of modern design technology that helps designers to finish production design assignment speediness , high speed , high quality , low cost . the application of cad of our country is at primary prevalence stage , and at the same time faces to the challenge of global networking and informationing . the developing requirement of users puts forword new requests of the cad production , software enterprise and application level . users not only require integration cad / cae / cam / capp / pdm and so on , but also puts forword the request on the aspect of deleveloping software , that is the same essentiality of convenience of users and intelligentize , functionality , leveling . on this developing tendency , put forword " the research and development of the object - oriented intelligentize cad system " , by conceiving a opening , applied , object - oriented cad system , realize the intelligentizing of designing parts , to provide effective measure of integration of information . and aims to push the application of cad technology at home and the application of advanced design technology in modern manufacturing 我国cad应用基本还在“甩图板”阶段，即初级普及cad阶段，同时又面临着全球网络化、信息化新的挑战，用户未来的发展需求对我们现在cad产品、软件企业和应用水平都提出了新的要求，用户不但要求集成cad cae cam capp pdm等一系列配套软件产品，在软件的开发方面提出了用户方便性和软件智能化与功能性并重的要求。在这种发展趋势之下，我们提出了“面向对象的智能化cad系统的研究与开发” ，通过构建一个开放的、实用的、面向对象的智能cad框架，实现企业零件设计的智能化，并为企业提供了信息集成的有效手段，以推进cad技术在国内的进一步应用和先进设计技术在现代制造业中的应用。
Graphics software can take out the spare parts sketch from graphics database that is used an evidence for writing nc program . because the data information stream from designing part to writing nc program is continuous , it is in favor of cad / cam integration . it can simulate the relation between the cutter track and the part , easily discover mistake and correct it 图形编程软件从图形数据库中调取零件图后即可作为编制加工程序的依据，从零件设计到数控加工编程，数据信息流是连续的，所以有利于计算机辅助设计和制造的集成，并可形象地模拟刀具轨迹与被加工零件之间的关系，容易发现和修改错误，提高了可靠性。
( 3 ) . put forward two structure scheme of opto - electronic deflection measurement sensor , light transmitting with non - mechanical scanning and light reflecting with non - mechanical scanning after compared exisiting methods of liquid level measurement to satify this needafter the comparison , an opto - electronic deflection measurement sensor based on light reflecting with non - mechanical scanning be confirmed . then the concrete design is to carry out , which includes the design of reflective surface , the design of pds ( photo detective subassembly ) ' s bracket , the design of floater and the design of shaking - absorbed accessory . during the process , there are a series of caculations and emulations . at last , the opto - electronic deflection measurement sensor has been designed and produced 比较了现有液位测量方法后提出了能够满足大佛寺长江大桥挠度测量要求的基于连通管的光电挠度计的非机械扫描光透射式和非机械扫描光反射式的两种方案，通过比较确定了非机械扫描光反射式方案。随后通过对该方案进行具体的零件设计，主要包括反射面的设计， pds (光电接收组件)支架的设计，浮子的设计以及减震零件的设计等等，在设计的过程中包含了一些理论计算和仿真，最终设计和制作了光电挠度计。
This paper emphasize the following content : 1 . based on summing up and analyzing the developing and applicating actuality of the cad system , studies following content : based on the cad software technology in existence worldwide and its application in the domestic enterprise now , the penman put forward the model of object - oriented intellectualized cad system ; 2 . on the basis of application of existing cad system , aiming at actual instance , and take the factual corporation as example , research and build the parametered circumstance of products and parts design in corporations ; 3 . exerting human - computer interactive technology , based on the thought of realizing factual part - designed function , study the developed strategy of human - computer interactive intellectualized part - designed flat roof ; 4 . explore the knowledge based engineering cad system , aiming to automatization and intellectualized parts design , and advance resolvent of practiced intellectualized cad system 基于国内外现有cad软件技术及其在国内企业中应用现状，提出了面向对象的智能化cad系统模型；在现有cad系统应用基础之上，以实际企业为例，研究建立了企业产品零件设计的参数化环境； 2运用人机交互技术，基于cad软件系统，探索了人机交互式智能化零件设计平台的开发策略； 3并在此基础之上探索了基于知识工程( kbe )技术的cad系统，达到了零件设计自动化、智能化的目的，为实用型智能化cad系统提出了解决方案。
