Windows98下IPC与可编程控制器的实时通讯

文章阐述了在Ｗｉｎｄｏｗｓ９８下进行实时通讯的一种方法，提出了满足本课题通讯要求的软、硬件解决方案。经过现场实际运行，满足了生产的实际需要，是一种方便的低价格工业控制环境的实时通讯方案。     

基于Windows的新型DCS的设计与实现

本论述了以Windows作为开发环境设计研制的一种新型分布式控制系统。本系统建立了DCS通讯系统,实现了DCS内部及各DCS间实时通讯,使DCS中信息的分布并行处理成为可能;实现了任意组态环境下的控制器参数的在线优化。     

一种实用的远距离数据通讯技术

针对以ＩＢＭ－ＰＣ及其兼容机做为上位机，以ＳＴＤ系列工控机做为下位机组成的工业控制系统，介绍一种远距离实时通讯方案。并讨论了通讯硬件接口电路及软件的设计方法。实际应用证明，该通讯系统简单可靠，能满足实时控制的要求。     

一种用于单片机开发系统的实时交换数据系统的软硬件实现

本文介绍了自选研制的单片机开发系统中一种实时交换数据的系统,这是一种实时的单片机与微机的交互系统,可以在一台微机和一个编程环境下实现串行通讯,CAN通讯,实时与应用程序的数据交换,从而大大加快单片机应用程序的开发。     

基于嵌入式PC104总线的智能四串口通讯模块的设计

提出了一种利用嵌入式微处理器设计的智能四串口通讯模块.主、从CPU协调控制信息传输, 由从CPU负责串口的接收和发送,使主CPU的通讯任务占用很小的系统资源,并使用CPLD技术及高速串口集成芯片.说明该串口通讯扩展模块具有智能可编程、实时并行的特点,能够满足实际工业控制对象的的需求.     

基于串口通讯的打包数据的接收方案

串口通讯是上微机与下微机通讯过程中一个较为常见的问题。本文提出了一个串口通讯中打包数据的接收方案,并用VB语言对此方案进行了实现。经过实际测试,该方案不仅能满足实时通讯的要求,而且保证了数据包传送的正确性。     

DSP技术在仿真器中的应用研究

通讯技术在仿真器的设计中有着非常重要的作用,通讯速率的快慢直接影响到仿真器实时性问题,对于仿真模型的实时解算和图形的实时形成尤为重要,从而决定了仿真效果.传统的通讯技术大多通过RS232串行口或者RS485来实现,但是传输速率较低.该文提出了一种以DSP为核心技术的通讯接口,解决了传统的通讯接口传输速率较慢的问题.该通讯接口板基于PCI总线,两个仿真器间通讯利用DSP的双缓冲的串行口的收发操作来完成,可以满足实时通讯的要求.     

Siemens R30与PC机并行通讯研究与实现

研究了困扰实际工程应用中跨操作系统并行数据传输技术瓶颈问题,并给出了一般的解决步骤。以某冷轧厂技术改造为背景。分析了该冷轧计算机控制系统中过程控制机与最佳化控制机间的并行通讯,用PC机代替最佳化控制机实现与过程控制机（Siemens R30）实时在线传输轧机生产电文。运用数据采集、单片机、CPLD等相关技术,设计和建立了基于Windows的PC机与Siemens R30实时并行通讯系统。该系统为研究轧机轧制模型、控制模型等提供了实时在线数据环境,满足了该厂技术改造的应用需求。该系统在某冷轧厂已经投入实际使用。运行稳定、可靠。     

MRP协议在EPA实时以太网中的研究与应用

针对目前现场工业环境中EPA实时以太网通讯时数据传输的可靠性、确定性与实时性难以得到保证的问题,依据IEC62439网络冗余协议的特点,提出用于解决这一问题的EPA实时以太网网络MRP冗余通讯协议。设计并实现了应用于EPA实时以太网中的MRP网络冗余通讯和网络拓扑发现系统,当网络产生动荡后,可以以毫秒级的网络收敛速度使EPA实时以太网的网络再一次达到网络通讯稳定状态。最后,本文对该系统网络收敛性和网络拓扑发现功能进行了测试。测试结果表明,MRP冗余通讯解决方案能够满足EPA实时以太网的网络性能需求。     

基于分布式仿真系统的实时架构设计

在大型控制系统全生命周期的研发、测试与验证过程中需要应用到分布式仿真平台,通过加载不同阶段不同格式的模型以满足开展联合仿真的试验需求;文章对分布式仿真系统架构进行深入研究,创造性的设计了基于RTX的实时仿真技术和基于反射内存的实时通讯技术的总体架构,设计了实时模型的加载方法,并针对实时通讯性能开展优化设计;文章基于分布式仿真系统的实时架构搭建了一套完整的仿真平台;通过测试节点间时间,1 kB数据单向延迟160 μs以内,满足控制系统实时性要求;本架构在控制系统的全数字、HIL、半实物测试仿真中进行了多轮应用,满足不同控制产品的测试仿真需求.     

Only connect: teaching, technology and telesis

Abstract This paper describes an approach to the design of interactive multimedia materials being developed in a European Community project. The developmental process is seen as a dialogue between technologists and teachers. This dialogue is often problematic because of the differences in training, experience and culture between them. Conditions needed for fruitful dialogue are described and the generic model for learning design used in the project is explained.     

European Community policy and the market

Abstract This paper starts with some reflections on the policy considerations and priorities which are shaping European Commission (EC) research programmes. Then it attempts to position the current projects which seek to capitalise on information and communications technologies for learning in relation to these priorities and the apparent realities of the marketplace. It concludes that while there are grounds to be optimistic about the contribution EC programmes can make to the efficiency and standard of education and training, they are still too technology driven.     

一种自适应子融合集成多分类器方法

融合集成方法已经广泛应用在模式识别领域,然而一些基分类器实时性能稳定性较差,导致多分类器融合性能差,针对上述问题本文提出了一种新的基于多分类器的子融合集成分类器系统。该方法考虑在度量层融合层次之上通过对各类基多分类器进行动态选择,票数最多的类别作为融合系统中对特征向量识别的类别,构成一种新的自适应子融合集成分类器方法。实验表明,该方法比传统的分类器以及分类融合方法识别准确率明显更高,具有更好的鲁棒性。     

煤矿井下安全监控分站的设计及其仿真实现

为了设计一种具有低成本、低功耗、易操作、功能强且可靠性高的煤矿井下安全分站,针对煤矿安全生产实际,文章提出了采用MCS-51系列单片机为核心、具有CAN总线通信接口的煤矿井下安全监控分站的设计方案;首先给出煤矿井下安全监控分站的整体构架设计,然后着重阐述模拟量输入信号处理系统的设计过程,最后说明单片机最小系统及其键盘、显示、报警、通信等各个组成部分的设计;为验证设计方案的可行性与有效性,使用Proteus软件对设计内容进行仿真验证,设计的煤矿井下安全监控分站具有瓦斯、温度等模拟量参数超标报警功能和电机开停、风门开闭等开关量指示功能;仿真结果表明:设计的煤矿井下安全监控分站具有一定的实际应用价值.     

Avoiding semantic and temporal gaps in developing software intensive systems

Development of software intensive systems (systems) in practice involves a series of self-contained phases for the lifecycle of a system. Semantic and temporal gaps, which occur among phases and among developer disciplines within and across phases, hinder the ongoing development of a system because of the interdependencies among phases and among disciplines. Such gaps are magnified among systems that are developed at different times by different development teams, which may limit reuse of artifacts of systems development and interoperability among the systems. This article discusses such gaps and a systems development process for avoiding them.     

基于QTE的蒙古文显示机制研究与实现

蒙古语言是中国蒙古族使用的通用语言,由于蒙古文区别于其他文字的书写方式和其自身变形机制等特点,在很多通用的文字处理引擎中都不被支持。在嵌入式产品开发与应用领域中Linux加QTE已经成为流行方式。该文给出了一种在QTE环境上实现基于标准Unicode的蒙古文点阵显示和变形算法, 并自定义了支持蒙古文的QTE组件,扩展了QTE功能,为在Linux加QTE方式的嵌入式体系结构中处理蒙古文提供了一种解决方法。     

Designing economic np control charts: A programmed simulation approach

This paper presents control charts models and the necessary simulation software for the location of economic values of the control parameters. The simulation program is written in FORTRAN, requires only 10K of main storage, and can run on most mini and micro computers. Two models are presented - one describes the process when it is operating at full capacity and the other when the process is operating under capacity. The models allow the product quality to deteriorate to a further level before an existing out-of-control state is detected, and they can also be used in situations where no prior knowledge exists of the out-of-control causes and the resulting proportion defectives.     

基于AD9626的模拟信号采集存储卡设计

自然界的绝大部分信号都是以模拟的形式存在,因此模拟信号的采集转换存储在数字时代十分关键。文章讨论了在雷达信号处理领域基于AD9626的AD采集存储卡的设计原理、硬件结构和程序设计与芯片配置等问题,为今后相关领域的研究提供了可参考的方案。     

The development of robot art

Going through a few examples of robot artists who are recognized worldwide, we try to analyze the deepest meaning of what is called “robot art” and the related art field definition. We also try to highlight its well-marked borders, such as kinetic sculptures, kinetic art, cyber art, and cyberpunk. A brief excursion into the importance of the context, the message, and its semiotics is also provided, case by case, together with a few hints on the history of this discipline in the light of an artistic perspective. Therefore, the aim of this article is to try to summarize the main characteristics that might classify robot art as a unique and innovative discipline, and to track down some of the principles by which a robotic artifact can or cannot be considered an art piece in terms of social, cultural, and strictly artistic interest. This work was presented in part at the 13th International Symposium on Artificial Life and Robotics, Oita, Japan, January 31–February 2, 2008     

A human-computer interface for non-computer specialists

The COM teleconferencing system was designed to be easy to use for both beginners and people with much computer experience. A number of design choices in organizing the human-computer interface were considered very carefully. These design problems are not unique for teleconferencing applications, but will appear in many other developments of human-computer interfaces for non-computer specialists. This report discusses naming conventions, menu format, user commands, help facility and the treatment of ‘type ahead’ from the users.