基于激光剪切干涉的长导轨直线度测量系统设计

针对长导轨直线度传统测量方法中存在的问题,研制了一种基于激光楔形平板剪切干涉测量的便携式激光干涉准直系统。根据剪切干涉测量原理,设计了光学元件的关键参数。在ARM9硬件开发平台下使用嵌入式操作系统WINCE5．0,通过Embedded C＋＋实现了导轨直线度误差值等的相关算法。系统实时计算相邻信号之间的相位差,简化了激光光束准直度调校测量设备的装调工作;根据信号幅值大小控制信号增益,实现精确检测大尺寸导轨直线度误差的功能。整个系统测量精度高,集成度高,便携性强,可应用于各种工业环境与室外测量。     

基于PLC的组合系统在导轨直线度检测中的应用

对电梯导轨直线度检测流水线的自动控制进行了研究,在分析某电梯导轨生产商对现场控制需求的基础上,设计了一种电梯导轨直线度检测的组合机床控制系统;首先,分析现场的工作原理和控制方式,确定系统功能需求;其次,对系统的硬件进行选型;然后,对系统进行软件设计,采用限幅平均滤波法和两端点连线法设计检测系统;最后,进行仿真和现场的实际调试,验证了所设计系统的可行性和可靠性,提高了生产效率和经济效益。     

基于激光位移传感器的车轮弯曲疲劳试验加载轴偏移量检测系统设计

通过分析现有的车轮弯曲疲劳试验机的失效检测方法,并遵照相关试验要求,完成了基于激光位移传感器的车轮弯曲疲劳试验加载轴偏移量检测系统的设计.该系统用于试验中加载轴的偏移量的实时监测,进而达到车轮失效时试验机自动卸载的目的.     

面向移动终端的三角网格逆细分压缩算法

针对移动用户的实时显示需求,提出一种基于逆细分的三角网格压缩算法.通过改进逆Butterfly简化算法,采用逆改版Loop模式,将细密的三角网格简化生成由稀疏的基网格和一系列偏移量组成的渐进网格;然后,通过设计偏移量小波树,将渐进网格进行嵌入式零树编码压缩.实验结果表明:该算法与以往方法相比,在获得较高压缩比的同时,运行速度较快.适用于几何模型的网络渐进传输和在移动终端上的3D图形实时渲染.     

禽蛋自动分级生产线中检测装置的设计及分析

为完善禽蛋自动分级生产线中检测装置的功能,在Pro/E中对检测装置进行了整体布局设计,利用Pro/Mechanism对检测装置中的凸轮称重机构进行了详细的结构设计和性能分析,并对检测装置中的传输系统进行了设计,得到了传输链的结构形式.通过对传输系统中的间歇传动机构的优化设计和仿真,最终得到了可靠的禽蛋传输系统.     

PSD激光直线度测量仪

介绍了采用PSD传感器设计的激光直线度测量的工作原理，以及激光器、光靶和计算机系统的设计。     

磁悬浮体位置检测系统的设计与实现

介绍了位置敏感器件(PSD)和实时模拟计算芯片AD538的设计原理和在磁悬浮体位置检测系统中的应用,在此基础上做了静态特性分析,并在磁悬浮装置中进行了应用实验,给出了相关实验结果.该系统能够满足磁悬浮系统非接触、高精度的要求.     

基于USB2.0的微胶囊内窥镜图像实时传输模块的设计

为了给微胶囊内窥镜系统的接受记录装置增加实时传输图像的功能,设计了基于USB2.0的图像实时传输模块;由数字信号处理器(DSP)作为主控机,通过CPLD对USB控制芯片CY7C68013进行读写和逻辑控制,实现了图像数据的实时传输,且接口传输速度满足医疗诊断的需要.     

全自动轴类直线度测量及调整装置设计

轴类工件的直线度调整方法需要调直和检测功能相互配合完成,一般需要两套设备或装置。通过设计一种基于DSP主控芯片技术的智能化测量调直装置,实现一台设备同步完成调直和检测。该设备设有检测工位和调直工位,工位可自动切换,设备可根据对轴类件直线度指标的检测结果,自行判断合格情况并对不满足设计要求的工件进行调直处理,直至其直线度合格。以DSP芯片为核心的嵌入式开发包,实现对激光传感器、压力传感器及电气执行单元的集成控制。软件采用CCS3.3开发环境,通过开发调直下压量自反馈机制和圆周跳动测量数据拟合程序,解决设备实现自动闭环控制的关键技术难题。调直检测实验结果表明,该设备可实现对轴类工件的全闭环智能自动检测及调直,直线度指标圆周跳动量小于0.05mm,可大幅减提高轴类工件的直线度水平。     

基于熵和运动偏移量的野生动物遮挡检测方法

针对野生动物实时目标检测过程中因遮挡导致的目标检测准确率降低的问题,考虑到视频特有的时间序列关系,提出了一种基于熵和运动偏移量的野生动物遮挡检测方法。该方法通过YOLOv3模型对目标进行特征提取,根据位置偏移量与视频序列中最低信息熵对应的图像,获取待检测遮挡目标的检测位置与类别。实验结果表明,结合YOLOv3、信息熵、时间序列关系以及位置偏移量的实时目标检测方法能够很好地解决野生动物遮挡的检测问题,提升了实时目标检测的稳定性与准确率。     

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.