基于COM/DCOM技术的分布式协同设计系统的研究

提出了一个基于COM/DCOM技术的分布式协同设计系统结构体系，对系统的组件构成和组件工作模型作了较为详细的叙述，并建立了一个基于COM/DCOM技术的分布式协同设计系统。给出了系统的运行情况。     

流程工业CIMS中ActiveX/DCOM技术的应用

本文针对流程工业中进行远程实时监控的现实意义，设计了基于ActiveX／DCOM的远程实时监控系统。在整个监控系统的整体设计上，采用了DCOM分布式对象技术作为系统的基本构架，以实时数据库组件为核心．在现场数据通信问题上采用OPC规范．并且使用Web浏览器作为客户端应用程序。通过在浏览器插入ActiveX控件实现各种操作。     

网络监控系统中数据动态交换技术的应用与研究

在工业计算机网络中要实现对制造过程的监视、控制和管理，计算机间数据动态交换是关键。介绍了Winsock和DCOM这两种常用的数据动态交换技术在网络监控系统中的应用，并从不同角度对它们作了详细的比较与分析。指出基于Winsock技术的系统具有开发方便、可靠性高、实时性强等优点，但也存在着多种数据交换复杂等不足，故仅适用于一般性的工业控制网络。而COM／DCOM作为一种基于组件对象模型的分布式技术规范，因其独特的标准、结构、特点．为大型复杂的网络监控系统设计开发提供了有效的工具。     

基于DCOM分布组件技术的网络化运动控制器设计

在分析了微软 DCOM技术的体系结构以及目前制造业中广泛应用的通用运动控制器结构的基础上 ,深入探讨了在应用 DCOM技术实现网络化运动控制器设计的过程中 ,构造运动控制组件的一些关键技术 :组件的接口定义、组件线程模型以及组件的实现 ,描述了如何应用此运动控制组件在DCOM技术的支持下来构造分布式的运动控制系统     

远程操控现有虚拟仪器的通用网络引擎研究

为了将现有的基于PC的单机版虚拟仪器在零编程、软件零修改量的情况下拓展成基于网络的远程虚拟仪器,提出了一种零编程的、基于通用网络引擎的远程虚拟仪器实现方法.其核心是给单机版虚拟仪器配置通用网络引擎后就可以快速衍变成远程虚拟仪器.其原理是将UML建模技术贯穿在整个引擎设计过程中,用J2EE组件(Applet和Servlet)技术实现引擎的远程操作控制功能,用COM组件技术实现引擎的零编程功能.基于通用网络引擎的远程虚拟仪器具有开发周期短、代码重复利用率高、零编程等特点.最后通过一个远程数字存储示波器的实现来验证其可行性.     

基于DCOM技术的分布式网络测试系统设计

给出了通用分布式网络测试平台的系统结构，介绍了系统各部分的实现方案。通过对系统软件实现的分析，给出了利用COM／DCOM组件技术实现的方法。实践表明，系统性能稳定，可靠性高。     

基于对象的分布应用技术的比较

介绍了基于对象的分布应用技术产生的背景，目前所流行的主要技术，如CORBA、COM／DCOM、COM＋等的特点，及它们间的比较。     

基于ObjectARX与COM技术实现异地绘图的研究

在结合 Auto CAD提供的 COM接口与 Object ARX[1 ]函数的基础上 ,给出封装所实现的自定义接口的方法 ,并利用 DCOM技术实现网络图形数据的传输。为解决异地设计的实时性和交互性问题提供了一种有效的途径     

基于COM/DCOM的分布式网络化制造系统构建

网络化制造环境下由于各单元间分布异构的特性而比单个企业内部的信息集成更加复杂，基于COM／DCOM的技术为构建分布异构的网络化制造系统结构框架提供了一种方案，本文概述了其技术内容并探讨了应用DCOM构建分布式网络化制造应用系统的体系结构，对未来技术的发展进行了展望。     

基于OPC-XML技术的Web远程监控系统

介绍了采用OPC、XML和Web技术的远程监控系统的实现方法。系统由OPC客户组件、Web服务器和Internet网络组成,实现了远程客户通过Web服务器访问现场数据的功能,实现了一种新途径的远程监控系统。     

用于无人机飞行控制系统的分布式测控系统设计

将复杂庞大的工程项目分解成多个功能单一的小模块实现，是COM组件设计思想的具体体现。在简要介绍分布式对象与对象服务后，本文设计了具有命名服务和事件服务两种对象服务功能的事件提供者和事件消费者COM组件以及其他诸如硬件驱动、图形显示等COM功能组件。这些组件提供的远程对象状态监控以及基于事件的对象间数据通信功能，使应用于无人机飞行控制系统的分布式测控系统的实现成为可能。最后，本文通过分布式传感器监测系统开发实例，说明本文所提出的组件设计方法能帮助系统设计者方便地扩展系统，加快系统开发速度，提高设计效率。     

基于组件的开放结构数控系统

提出并实现了一种模块化、可重构、可互换和可裁减的开放式数控系统结构,为快速定制和开发数控系统提供了一个软件结构和环境,该结构结合了通用PC、RTLinux和实时组件的优点。在分析现有组件标准不能应用于数控系统的原因的基础上,给出一种可用于数控系统的组件模型。介绍了由该模型实现的开放结构数控系统的基本组成成分,以及组成一个基本数控系统组件的功能、接口和图形表示。详述了该系统的虚拟模块系统和配置系统,虚拟模块系统主要实现数控系统模块间通信和模块的调度,配置系统主要实现数控系统的集成。给出了该组件的实现框架,并在RTLinux上实现了该结构的原型系统。     

Flow measurement system model with distributed resources

The paper describes a general flow measurement system model with distributed resources based on Distributed Component Object Model (DCOM). Complex flow-rate calculation procedures are decomposed and distributed throughout the measurement system. The paper explains to what extent a flow measurement process can be partitioned into the services that can be realized as separate objects shareable across the network. Certain measurement system components perform local measurements and/or calculations and communicate with a remote measurement system resource via intranet/internet. The measurement system comprises direct measurements of the primary measurement quantities, the calculation of the flow-rate and the calculation of the physical properties for various gases, gas mixtures, water and steam. Using DCOM the measurement system automatically activates the remote client/server components that carry out flow-rate calculations in real time. The measurement system covers different measurement procedures and a variety of primary elements. The performances of the measurement system model have been verified by realizing a measurement system with two measuring sections.     

基于ASP.NET的远程气动元件设计系统

利用网络实现设计资源共享及提高设计效率已成为当前CAD应用和开发的追求目标。基于ASP.NET技术的远程气动元件设计系统采用客户层、中间层、执行层三层体系架构,由ASP.NET实现之间的联系。利用Solid Works的COM组件及其二次开发技术建立气动元件图库,并采用Access进行数据库的建立和管理,从而实现了远程气动元件的设计。     

Development of a distributed geometric modeling system based on peer to peer

Distributed systems are required in industrial environments for collecting distributed information. The developed distributed CAD system has sharing of functions, which consist of a client and server as a Peer to Peer (P2P) system. It is constructed using CAD kernel and COM/DCOM technology to share functions on a network. In recent years, the distributed system has been applied to industries for combining work functions. Here, the requester is the client, and the provider is the server. The developed system in this study shares the functions among the systems through a P2P structure. All systems linked to a local network can use the functions of the other systems. The importance of constructing this kind of distributed CAD system is for transferring 3D model data for gaining access to the location of the providers. This system can perform many operations concurrently using other systems and can save time on work. Some of the operations performed and tested by the developed distributed CAD system are Boolean operation, obtaining properties, triangulation, and tessellation.     

Web-based remote monitoring and fault diagnosis system

This paper proposes an approved Web-based multilayer distributed software architecture solution for remote monitoring and fault diagnosis. To tightly integrate legacy monitor systems, a component framework model based on COM has been proposed, which is very suitable for remote monitoring and fault diagnosis applications. This system has the potential for exchanging a data acquisition system by using wrapper service components. A mixed thick Web client architecture is proposed to implement real-time remote monitoring. A Web-based remote monitoring and fault diagnosis system is developed by using modeling technology, Web application technology, component technology and VME extension for instrumentation (VXI) bus technology, which publishes a fault diagnosis algorithm package, a basic monitoring package and an advanced analysis package on the Internet. This system provides authorized users with an effective and instant way to access new monitoring and diagnosis component packages in time. This paper gives researchers a paradigm to accomplish similar systems. The technique developed may be used for other fields, such as power engineering, manufacture and transportation system.     

DCOM and MMS–based control software architecture for automated manufacturing system

In this paper, we introduce the manufacturing message specification (MMS) and compare two distributed object approaches–distributed component object model (DCOM) and common object request broker architecture (CORBA), suggest characteristics that DCOM is more suitable for automated manufacturing system (AMS) control software integration. In order to make a control system provided with interoperability and reconfigurability etc., a hybrid control system is built for AMS, then a control software architecture is presented for AMS based on distributed object DCOM middleware and MMS standard. The object-oriented DCOM communication protocol is used to implement the MMS in a distributed object mode. DCOM and MMS combination brings the operating system independent communication capabilities to manufacturing devices such as CNC machine tools and industrial robots in AMS. Control software implementation of MMS concepts in the DCOM environment is particularly discussed. Finally, to verify the control software architecture for AMS, prototype development has been implemented in VC++ 6.0 developer environments.