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基于网络的异构图档中间件系统的研究

Research on Web-based Heterogeneous Graphics Middleware Systems

【作者】 丘宏俊

【导师】 陶华;

【作者基本信息】 西北工业大学 , 航空宇航制造工程, 2003, 硕士

【摘要】 当今,在制造业企业中往往同时使用多种CAx应用系统。这些由不同软件开发商提供的产品在不同程度上都存在差异性,从而导致企业不得不面对不同应用系统所产生的异构数据的问题,给产品数据信息的共享、集成造成了极大的困难;再者,这些应用系统都是基于C/S架构开发,传统软件架构的不足给企业造成了经济上的负担和使用上的不便。针对这些问题,本文提出了一种基于网络的异构图档中间件系统的解决方案,采用STEP标准为产品数据信息交换的“桥梁”、以JavaTM+XML技术为基础开发一种基于B/S架构的中间件系统,旨在实现异构产品数据信息在网络中的交流和共享。 针对基于网络的异构图档中间件系统,本论文主要做了以下的研究工作: 1.研究了异构应用问题的解决方案 C/S架构的不足造成了不同应用之间的异构性,以B/S架构为基础开发的中间件可以有效解决异构应用的问题; 2.研究了异构产品数据信息的共享技术 异构数据的问题导致了产品数据信息难以进行交流和共享,产品数据不同的集成模式和STEP标准是实现异构产品数据信息进行交流和共享的技术基础; 3.提出了基于网络异构图档中间件系统的解决方案 突破了传统研究方法的一些局限,结合了当前技术的发展以及将来的趋势,提出了一种基于三层B/M/S架构的异构图档中间件的解决方案,采用了JavaTM+XML技术作为系统实现的基础,使得系统具有高度的灵活性、先进性和前瞻性; 4.研究了系统实现所要用到的关键技术 以在Web浏览器下实现产品数据信息浏览为目的,以JavaTM+XML技术为系统的实现基础,研究如何把各种不同的CAD应用系统导出中性文件转换为一种易于处理的XML格式文件,从生成的XML格式文件提取有关的产品数据信息,对信息进行加工处理,利用Java3D API技术构造虚拟现实场景图来重构产品数据信息的几何真实感图形,得到可以在网络中发布的Java类文件; 5.开发了一个原型系统 原型系统可以实现在客户端的Web浏览器下对一些比较简单的零件产品的几何数据信息进行浏览和一定的互操作功能。

【Abstract】 Nowadays, several CAx application systems have been often using at the same time in one manufacturing enterprise. These software products developed by different software developers have some differences between them, which consequently result that enterprises have to be up against the heterogeneous-data problems produced by different application systems and makes an obstacle to achieve product data information’s sharing and integration. Furthenjnore, these application systems were developed based on C/S model, the insufficiency of C/S model makes a burden of economy to enterprises and an obstacle to use the softwares. Aim at these problems: a solution of web-based heterogeneous graphics middleware system is put forward in this thesis. We adopt STEP as the bridge of product data information’s intercommunion and use Java?XML as technical basic to develop a middleware based on B/S model, which can achieve product data information’s intercommunion and sharing in network.In order to implement the web-based heterogeneous graphics middleware system, several key technologies and techniques are studied in this thesis.a. The solution to heterogeneous applications. The middleware developed based on B/S model is the solution to heterogeneous applications.b. The intercommunion technology of heterogeneous product data information.The model of product data’s integration and STEP is the technical basic of this problem.c. The web-based heterogeneous graphics middleware system. The framework of web-based heterogeneous graphics middleware system is put forward, Java?XML is used as the technical basic to develop the system.d. Several key technologies and techniques. The key technologies and techniques in system developing including transform from ISO 10303-21 to ISO 10303-28, pick-up concerned product data [information from ISO 10303-28, transaction of information and visualization of product data information.e. A prototype. This prototype can be used to browse some product data information of simple parts produced from CAD system.

【关键词】 产品数据信息ISO10303JavaXML中间件
【Key words】 Product data informationISO10303JavaXMLMiddleware
  • 【分类号】TP393.09
  • 【被引频次】1
  • 【下载频次】70
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