基于嵌入式Web服务器和ZigBee的远程数据采集系统设计

为实现远程数据采集需求,提出了一种综合应用嵌入式Web服务技术和ZigBee技术的远程数据采集系统设计方案,并完成了系统软硬件设计。ZigBee传感器网络实时采集现场数据,并通过串行总线与嵌入式Web服务器通信,实现数据上传,远端用户通过Ineternet浏览器访问嵌入式Web服务器,获取远程实时数据。经实例验证,该系统具有实时和高效的优势,且运行维护成本较低。     

基于GSM网络的远程抄表系统的设计与实现

针对国家提出的旧社区设施改造及新住宅建设等问题,本文设计开发了GSM网络远程抄表系统对小区居民用电量情况进行远程数据采集、数据传输和实时监控等过程.整个系统分为采集器模块,GSM通信模块,显示模块和智能电表等部分.该系统在GSM网络通信平台的基础上,利用TC35i通信模块,实现单片机控制电表数据的采集、实时传输和监控管理等问题.该系统的软硬件采用模块化结构,系统成本较低.运行测试显示,该系统数据采集和数据传输可靠性高,具有很好的市场潜力.     

WinCE下多线程串口通信在导航系统中的应用

基于Windows CE操作系统下的GPS导航系统需要实时地接收来自GPS接收机的定位数据,同时对串口进行实时监控并且还可以在前台界面进行一些其他的操作,利用基于多线程的串口通信编程方法可以有效地解决这一问题。介绍了WinCE操作系统的特点、GPS导航系统的特点、多线程技术的基本概念和串口通信编程技术,分析了GPS导航系统的功能和需求,着重阐述了采用多线程的CCom Port类的串口通信方法来获取定位数据的软件设计过程。通过测试,在满足系统实时性要求的同时,避免了资源浪费,提高系统软件的运行效率。     

基于单片机控制器的水质实时检测系统

设计了一种基于单片机控制器的水质实时检测系统,其硬件主要由单片机、A/D转换器、下位数据采集器、单片机串行通信模块、键盘与LED显示模块等组成。该系统主要用于水产养殖中,可实时了解水塘的水质情况,提高养殖效益。系统通过多个下位采集器采集水质的多种指标,下位从机与主控单片机采用串口通信方式,通过软件编程实现多路水质指标的显示,如果检测到的数据超标则鸣笛报警。系统结构简单、成本低廉,具有一定的实用价值和推广意义。     

阀门启闭动态转矩测定装置数据采集方案研究

根据阀门启闭动态转矩测定装置设计要求，提出了基于单片机高分辨率模数转换和单片机的数据采集方案。利用Visual Basic6．0提供的MSComm通信控件可以非常方便地编写Windows环境下的串口通讯程序。本文详细介绍了基于PIC16F877单片机的串行数据采集与控制系统实现以及PC机与单片机间串口通讯软件设计。该方法实现简单，功能满足要求，运行可靠。     

基于串口方式一的PC机与单片机的多机通信

以矿井环境安全监测监控系统实验装置的设计为例,提供一种用串口通信方式1实现PC机与单片机多机通信的方法,简单易行,成本低廉,经多台工业化产品的实际运行证明稳定可靠,性能优良.可推广应用于分布式测控系统或数据采集系统中.     

基于Matlab GUI的三容水箱液位实时监控系统设计

为了实现三容水箱教学实验平台中液位控制算法的多样化和可移植性,设计了基于Matlab图形用户界面(Graphic User Interface,GUI)的计算机监控系统。利用Matlab的串口通信API,通过RS-485/RS-232数据通信接口实现对三容水箱液位的数据采集和控制。通信采用Modbus RTU协议确保数据的可靠传输。系统软件界面友好、编程方便、操作简单,同时用户可以植入算法使系统运行于多种模式下。结果表明,基于Matlab GUI设计的计算机监控系统能够快速、准确地绘制出液位响应曲线,Flash动画能够实时模拟出实验进度。     

基于烟气分析仪的数据采集与处理系统设计

为了实现工业锅炉运行经济性的在线监测与分析,便于生产运行人员及时了解和调整锅炉的运行状况,设计了一种基于烟气分析仪的数据采集与处理系统。该系统可以实时准确地采集数据,并实现数据显示、存储、远程通信等功能,解决了人工离线录入数据的难题,为性能优化分析、指导运行优化操作提供了便利。现场调试结果验证了该系统设计的合理性和有效性。     

基于Android的数据采集系统分析与设计

描述了基于Android的数据采集系统的系统构成和网络结构,分析设计了采集系统的数据流图,重点介绍了Android系统下数据采集系统的串口通信方法、多线程设计方案.实现了Android系统通过串口采集ZigBee系统数据,并通过TCP/IP网络上传数据.     

应急环境监测可视化系统的设计与实现

为了实现实时应急环境监测,设计并研发了能够与无线传感自组网结合、实时接收传感器节点数据的桌面端可视化系统.系统集成GMap.net、串口通信技术和数据库技术,与网关节点进行串口通信,能够实时接收传感器传输的环境参数和地理位置等信息,并具有环境参数实时显示、趋势分析、系统报警、节点地理位置显示和管理等功能.系统在福州大学...     

卡思卡特城堡

It is worthy of noting that, whilst Crookston Castle witnessed the earlier and happier portion of Mary's variegated life,     

不同的吃喝玩乐

一、吃和喝吃苹果 eat an apple, 吃药 take medicine,吃糖 have some sweets,吃饭 have one's meals,吃馆子 dine out,吃惊 be surprised/     

漏洞百出的教育

Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help?     

只要努力,不要后悔

There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love.     

浅谈移民问题

Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject.     

Sister Carrie, an Adherent of Desires

Sister Carrie is one of the most controversial characters in American literature.Thought as a "fallen woman" firstly,she was defined as a "new woman" by some critics later. However, by digging into the motivaton behind the whole process of Carrie's "success", the relationship between Carrie and her creator (the author), the social conditions of then American, it can be found that Carrie has never been free-standing on her thought and she has never found her real-sdf even after becoming a famous actress. In a society dominated by mass consumerism Carrie is only an adherent of her own desires. She also is a representative of all those country girls flooded into cities, a symbol and a sacrifice of the urbanization of America in a time countryside was overcome by cities.     

Improvement of one-cycle controller by use of proportional integral differential controller

1.IntroductionOne-cyclecontrolmethod,whichwasproposedaboutonedecadeago[1],hasbecomeanattractivemethodinspecialfieldssuchaspowerfactorcorrection[2-6],switchingamplifiers[7,8],etc.Themainideaofthiscontrollerisbasedonintegrationofdiodevoltageinone-cycleandforcesittobeexactlyequaltothereferencevalue.Themainadvantageofthiscontrollerisitsrealtimeabilitytorejectthevariationofinputvoltage[1].Despitethisgreatability,ithasnogoodperformancesinrejectingofloaddisturbanceandfollowingreferencecommands.Espec…     

库克斯顿城堡

城堡, 是欧洲典型的建筑之一, 每个城堡都有一个美丽的传说或是一段历史。从本期开始, 我们将推出“城堡之旅”, 带各位读者去浏览、观赏欧洲各地的城堡, 开始一段文化与历史的旅途!     

The Reader Response Approach to Teaching of English Literature

During interview with English majors, it was found that a majority of students expressed disappointment with their experience of English literature classes. Students' dislike of learning English literature appears to be the major problem of teaching English literature in China. Reader response approach is a good way to solve this problem. In this paper, I explain the rationale behind the reader response approach, such as its origin, definition, features, assumptions, and strategies. Then I illustrate how reader response approach works as a teaching strategy by presenting several teaching models. At last I evaluate its usefuiness for teachers and present the advantages of reader response approach in Chinese context.