基于赫优讯嵌入式模块EtherCAT从站设备的设计

随着实时工业以太网技术的发展,在最新版本的IEC61158 Ed.4标准中已经包含了Profinet,EtherCAT,Ethernet/IP,SERCOSⅢ等11种实时以太网行规集。以netX网络控制器为处理器的嵌入式模块comX,是支持所有主流实时以太网协议的嵌入式模块。本文在介绍了实时以太网和netX网络控制器的基本结构和功能的基础上,详细探讨了基于该嵌入式模块comX的实时以太网从站设备的网络接口硬件组成和软件实现,以及在智能分拣系统中的应用。     

基于赫优讯嵌入式模块EtherCAT从站设备的设哥

随着实时工业以太网技术的发展．在最新版本的IEC61158Ed．4标准中已经包含了Profinet．EtherCAT．Ethernet／IP．SERCOSⅢ等11种实时以太网行规集。以netX网络控制器为处理器的嵌入式模块comX,是支持所有主流实时以太网协议的嵌入式模块。本文在介绍了实时以太网和netX网络控制器的基本结构和功能的基础上．详细探讨了基于该嵌入式模块comX的实时以太网从站设备的网络接口硬件组成和软件实现,以及在智能分拣系统中的应用。     

研华推出2口CAN总线PCI-104通讯模块——PCM-3680I

德国赫优讯自动化系统有限公司（HiIscherGmbH）日前宣布netX开发与评估板NXEB100-NET通过CC-LinkV2．00认证。netX网络控制器具有高度的灵活性,设备制造商在基于CC-LINK协议进行产品开发的硬件设计的基础上,无需再次开发,就能够拥有具有其他现场总线和实时以太网协议接口的产品。并且,当用户设备集成netX通讯接口,     

德国赫优讯自动化系统有限公司 新一代工业网络控制芯片netX系列又有新发展

网络控制芯片netX是一个单片系统（SoC），为集成各种各样的现场总线和以太网通讯提供了无可比拟的灵活性，支持几乎所有主流的现场总线和实时以太网工业网络通讯技术。[第一段]     

基于PROFINET的开放式以太网控制器的设计

为了适应未来工业控制领域的发展需求,设计了一种基于工业以太网--PROFINET的开放式以太网控制器,并结合可精简的TCP/IP协议栈--Lwip,实现了嵌入式Web服务器.为了完成服务器中的动态数据交互功能,提出了一种新型的嵌入式多重网关接口(EGI).通过西门子的开放式以太网协议,实现了西门子PLC与设计的开放式以太网控制器相通信,报文分析结果表明,其具有较高的可行性和有效性,为开发PROFINET IO设备提供了基础.     

论基于不同工业通讯协议的CPU数据访问方式

评估一个网络控制器的性能,通常都只会注意到它本身具备了哪些功能,在一个通讯系统中它能实现哪些特殊的功能。我们很少会注意到,当该网络控制器与高速CPU数据接口相连时,传输批量数据所遇到的数据传输瓶颈问题,特别是对于实时性能要求特别苛刻的实时工业以太网系统。与传统的现场总线系统相比,实时以太网系统的循环周期要求更小,传输的报文长度也要求更长。另外,对于同步需求和时间抖动,其精度要小于10纳秒。如果还延续过去常使用的双端口内存DPM主机接口访问方式,显然已经不能满足其性能需求了。在接下去的文章中,将讲述如何选用灵活多样的netX控制器接口来满足不同的工业通讯系统的不同需求。     

基于可编程控制器和工业以太网的电加热温控系统设计

研究了一种基于可编程控制器(programmable logic controller,PLC)和工业以太网的电加热温控系统,该系统采用先进的可编程控制器作为基本控制器实现了对大滞后、强非线性电加热系统温度的自动控制。并采用先进的工业以太网通讯方式,实现了西门子S7-200 PLC和STEP7 Micro/WIN编程软件以及S7-200和组态王监控软件之间的通讯。实验结果表明,采用可编程控制器作为主控制器对电加热温控系统进行PID控制可以达到化工实验过程中对温度控制的要求。同时,采用工业以太网进行通讯具有很好的可靠性和安全性。     

离散工业设备联网监控研究

在简要分析离散工业生产的特点和网络控制需求的基础上,提出了一种基于工业以太网的联网监控方案,利用嵌入式控制器作为连接离散工业设备的节点,再组成工业以太网并通过路由器接入企业信息网,从而实现了离散工业设备的联网监控.以嵌入式芯片为核心开发了嵌入式网络控制器,并在某专用汽车制造厂实现了焊接设备的联网控制.     

高速列车空气动力学试验以太网接口设计

针对高速列车上空气动力学试验布线复杂,易受干扰等问题,提出了分布式以太网检测系统,并设计了一个嵌入式以太网接口,采用ENC28J60作为以太网控制器和ARM Cortex-M3内核的STM32作为主控制器,移植了RT-Thread嵌入式系统以及LwIP协议栈,并建立了基于TCP的应用程序,实现了与上位机的高速以太网通信。经过测试,该以太网接口稳定可靠,满足高速列车空气动力学试验的要求。     

电子辐照加速器控制系统的设计与实现

用分布式网络控制设计并开发了电子辐照加速器控制系统。硬件采用工业控制计算机与西门子可编程逻辑控制器PLC,PLC间采用MPI总线连接,与控制计算机采用以太网连接。计算机控制系统软件采用实验物理和工业控制系统EPICS进行模块设计,输入输出控制器IOC使用设备驱动程序实现了对可编程逻辑控制器PLC的访问,操作员接口OPI界面友好,并实现了EPICS下的数据存储系统。经现场测试与运行表明该控制系统稳定、可靠。     

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。     

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.     

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.     

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     

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.     

Explanation and prediction: an architecture for default and abductive reasoning

Although there are many arguments that logic is an appropriate tool for artificial intelligence, there has been a perceived problem with the monotonicity of classical logic. This paper elaborates on the idea that reasoning should be viewed as theory formation where logic tells us the consequences of our assumptions. The two activities of predicting what is expected to be true and explaining observations are considered in a simple theory formation framework. Properties of each activity are discussed, along with a number of proposals as to what should be predicted or accepted as reasonable explanations. An architecture is proposed to combine explanation and prediction into one coherent framework. Algorithms used to implement the system as well as examples from a running implementation are given.     

Three Process Perspectives: Organizations, Teams, and People

This paper provides the author's personal views and perspectives on software process improvement. Starting with his first work on technology assessment in IBM over 20 years ago, Watts Humphrey describes the process improvement work he has been directly involved in. This includes the development of the early process assessment methods, the original design of the CMM, and the introduction of the Personal Software Process (PSP)^SM and Team Software Process (TSP){^SM}. In addition to describing the original motivation for this work, the author also reviews many of the problems he and his associates encountered and why they solved them the way they did. He also comments on the outstanding issues and likely directions for future work. Finally, this work has built on the experiences and contributions of many people. Mr. Humphrey only describes work that he was personally involved in and he names many of the key contributors. However, so many people have been involved in this work that a full list of the important participants would be impractical.     

基于复小波噪声方差显著修正的SAR图像去噪

提出了一种基于复小波域统计建模与噪声方差估计显著性修正相结合的合成孔径雷达(Synthetic Aperture Radar,SAR)图像斑点噪声滤波方法。该方法首先通过对数变换将乘性噪声模型转化为加性噪声模型,然后对变换后的图像进行双树复小波变换(Dualtree Complex Wavelet Transform,DCWT),并对复数小波系数的统计分布进行建模。在此先验分布的基础上,通过运用贝叶斯估计方法从含噪系数中恢复原始系数,达到滤除噪声的目的。实验结果表明该方法在去除噪声的同时保留了图像的细节信息,取得了很好的降噪效果。