高精度低成本车用超声波传感器的研制

本文介绍了利用超声波传感器实现无接触式测距.系统由AT89C2051单片机、超声波电路、环境温度电路及显示电路组成.该测距仪具有高精度(±1 mm)、低成本的特点.     

基于单片机的超声波测距系统研究

超声波测距是一种非常有效的非接触式测距方法 ,被广泛应用在各种需要测量距离或者物位参数的场合。本文较为系统的介绍了以STC12C5A60S2单片机为主控芯片的超声波测距系统,选择DYP-ME007超声波测距模块组成测距传感器,选择数字温度传感器DS18B20采集温度,并对系统软、硬件进行了设计。     

基于PIC单片机的超声波测距系统

利用超声波测量距离是一种有效的非接触式测距方法,本文介绍了PIC单片机控制的超声波测距系统的原理,给出系统的硬件构成和软件控制流程,并在数据处理中采用了温度补偿修正。此系统具有易控制、工作可靠,测距精度高的优点。     

高准确度超声波测距仪的研制

利用超声波传感器实现无接触式测距。系统由AT89C2051单片机、超声波发射电路、超声波接收放大电路、环境温度采集电路及显示电路组成。超声波测距仪具有高集成度、响应速度快,测量准确度高(±0.02m)、性能价格比高等特点。     

基于FPGA的多通道超声波测距系统设计

超声波测距是一种非接触式连续测量方法,具有电路简单、测量精度高等优点;传统的测距系统多采用单片机实现,无法满足现代测距实时性、立体化、多向性的要求;因此设计了一种基于FPGA的多通道超声波测距系统,所有通道同时进行检测与处理,系统具有较高的扩展性;硬件部分采用US_100超声波传感器实现了超声信号的发射与接收,采用京微雅格C192芯片对回波信号进行检测和处理,实现了从2厘米到4米的距离的精确测量,测量结果送入LCD12864进行显示;软件设计采用Verilog HDL语言在Primace编辑环境下进行开发,在Modelsim软件下进行仿真,并通过HR3开发板验证了全部设计功能;测试结果表明:该测距系统运行稳定可靠,测量精度高。     

基于AT89C52的超声波测距系统设计

随着科学技术的不断发展,超声波测距装置得到了越来越多领域的应用.在超声波测距系统的运用场合中,其测距系统具有不同的精度,系统的误差较大,且常常不能满足应用的需求.论述了基于AT89C52单片机的超声波测距技术,可以实现无接触的测距功能,提出采用模块化设计,综合分析实现超声波测距仪的各种功能.     

基于STM32单片机的高精度超声波测距系统的设计

超声检测技术因其突出的非接触式检测功能,其已被广泛应用于汽车倒车的防撞系统,以及像是在建筑施工过程中采用的测量探测技术,工业的自动化控制技术,机器人进行视觉识别等等生产生活中的重要领域当中。超声波具有传播距离远,以及指向性强的特点,在使用中不需要受粉尘,光线,电磁波等诸多因素影响所以超声波测距是目前最普遍的应用方式。本文研究了一种基于STM32单片机的高精度超声波测距系统,阐述了超声波测距的基本原理,整个系统的的设计方案,以及系统的软硬件设计方案。     

超声波语音测距系统在车辆避障中的应用

介绍了一种基于单片机控制的超声波语音测距系统.采用多路超声波语音测距电路的测量方法,提高了距离测量的精度和准确性,实现了车辆全方位避障的可能性.给出了超声波语音测距系统在车辆避障中的实际应用.     

基于超声波的自动测距系统设计

本文介绍利用AT89C51单片机设计的一种用于倒车雷达的超声波自动测距系统,提醒驾驶员在倒车时有效的避开可能对倒车造成危害的障碍物和行人,从而有效避免由于倒车造成的汽车碰撞或擦伤的经济损失和人身安全问题,具有较强的实用性.本文在分析超声波测距系统原理的基础上,指出了设计测距仪的思路和所需考虑的问题,给出了实现超声波测距...     

超声波测距的设计与实现——硬件设计

本文介绍一款基于单片机C8051f0005控制超声波传感器发送和接收,实现距离识别的超声波测距系统.本文介绍该超声波测距仪的硬件设计、焊接和调试.最后总结并提出下一步改进方案.     

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。     

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.     

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.