基于CAN总线的电梯群安全性实时检测系统设计

基于CAN总线,以ATB9C51单片机和CAN总线控制器以及CAN总线收发器为主体构成控制模块,实现了电梯安全性实时检测。在此基础上可以通过对数据的分析,实现故障预测并及时处理。     

电梯控制器中CAN通讯的设计与实现

将CAN总线用于电梯控制器中,实现了基于51的CAN与基于ARM的CAN之间的通讯;在BasicCAN模式下,对CAN2.0A协议帧信息进行实际内容规划,并对通讯过程中的一些重要参数进行设置;以MEDWIN为软件平台,采用C51编程,实现电梯控制器中楼层控制板和轿厢扩展板的功能,主板控制器、轿厢控制器以及轿顶控制器采用ADS1.2作为软件平台;各控制器通过CAN总线进行信息的传输;实验证明,CAN总线可以用于电梯控制器的通讯中,性能可靠,实时性好.     

基于现场总线的电梯监控系统设计

基于CAN总线技术,以AT89C51为核心,采用Intel82526及PCA82C250构成的电梯监控系统,通过主控制器与轿厢、门厅控制器间的通信,完成了对电梯的控制,并可进行远程监控。对通讯中出现的冲突采用非破坏性仲裁的方法解决。     

2008年安防精品—深圳达实智能股份有限公司

DAC MJ-M8八门门禁控制器；DAC MJ-k2双门门禁控制器；DAV MJ-M4四门门禁控制器；DAC DT-KZ32路电梯控制器；DAC门禁感应器系列[第一段]     

基于CAN总线的电梯呼梯控制器的设计与实现

本文设计了一种基于CAN总线的电梯呼梯控制器,它是电梯的一个重要组成部分。该控制器用于给出每一楼层的呼叫请求信息,并显示电梯当前运行情况。本系统采用目前比较流行的工业现场总线CAN总线完成呼梯控制器与主控之间的通信,并提出了其软硬件和通信协议的设计方法。     

P87C591内嵌CAN控制器的应用设计

独立的CAN控制器芯片需要外接一个微处理器,接受外部CPU的控制才能运行。如果微处理器内部带有CAN控制器,无疑会大大简化应用系统的硬件设计,系统的可靠性也有很大提高,同时还可以大幅度降低生产成本。Philips的新产品P87C591内部集成了CAN控制器。本文主要介绍如何利用P87C591进行CAN节点的设计和应用。     

基于CAN总线的非接触式IC卡门禁与巡更监察系统

该文介绍了一种基于CAN总线的非接触式IC卡门禁与巡更监察系统方案,重点讨论了节点门禁与巡更控制器的设计,并阐述了系统的特色、主要功能及应用前景。实践表明,CAN总线数据传输性能稳定可靠,使用非接触式IC卡操作安全便捷,因而极大地提高了社区安防管理效能。     

电梯控制系统CAN通信节点设计

针对电梯控制系统对分布式、实时性和模块化的特点要求,设计了以AT91RM9200微处理器为核心、以MCP2510为CAN控制器的CAN通信节点,从硬件和软件两方面详细叙述了如何进行CAN网络节点的设计,并将其成功应用在电梯控制系统中,提高了系统实时响应和抗干扰能力。     

μC/OS-Ⅱ实时操作系统在压力测控系统中的应用

针对工业色谱仪中对管道压力的检测控制要求,设计了压力检测控制器,在该控制器中,采用CAN现场总线,同时使用了Cygnal公司生产的集成有CAN控制器的C8051F041芯片,完成了系统的硬件设计.软件设计使用了μC/OS-Ⅱ嵌入式实时操作系统.编写了底层硬件驱动程序以及上层应用程序,从而完成了整个压力控制器的设计.     

基于CAN/LIN混合网络的电梯通信系统

介绍了一个专门为以PLC为核心控制器的电梯控制系统而设计开发的电梯通信系统。对起源于汽车工业的总线技术CAN总线和LIN总线进行了研究，说明了CAN总线、LIN总线在电梯通信系统中的应用，提出了可靠而低成本的CAN／LIN混和网络体系，并设计了CAN／LIN数据交换的网关．分析其系统构成和通信实现。由CAN／LIN混合网络体系构成的通信系统与用传统通信方式构架的电梯通信系统相比，前者具有低成本、高可靠性的特点。     

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.     

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     

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.     

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.