基于Internet的分布式供能远程监控系统

本文介绍了应用于分布式供能的基于Internet的远程监控系统及监控系统的组成,并探讨了其中的关键技术。远程监控系统程序使用VB进行编写,通过Internet进行远程数据传送,下位控制器负责现场设备控制和采集系统的运行数据,IPC进行现场运行监控和数据分析处理并作为远程监控服务器。通过实际应用,表明远程监控系统可以满足分布式供能系统远程监控的要求,对分布式供能系统的推广有很大的促进作用。     

基于GPRS通信的油田开发远程测控系统的设计

利用现场分散采集,通过GPRS通信,最后由中心计算机集中接收处理和控制,构成基于GPRS通信的油田开发远程测控系统,实现对油田现场分散设备多种参数的现场测量、远程传输和集中处理;详细介绍了基于GPRS通信的油田开发远程测控系统的构成、监控中心计算机系统的构成以及远程测控终端工作原理,通过电参数的计算公式给出抽油机工况诊断判断依据;文章提出的基于GPRS通信的油田开发远程测控系统推广应用到油田各相关领域,这必将大大推进数字化油田建设的进程。     

配电变压器远程监控系统的设计

本文介绍了配电变压器远程监控系统的设计及工作原理。包括现场远程终端的数据采集、运算、处理、远程传输和后台监控等几个方面。并以硬件框图和软件框图的方式描述整个系统的工作过程。     

基于LabVIEW 8.0 DataSocket技术的远程监测化学虚拟仪器系统

利用互联网实现远程测控是虚拟仪器发展的主流方向。作者设计制作了基于LabVIEW 8．0的现场温差测量的化学虚拟仪器和远程监测平台,运用LabVIEW的DataSocket(DS)技术,通过网络组建了基于LabVIEW 8．0远程监测化学虚拟仪器系统,实现了远程监测多台现场温差测量化学虚拟仪器的自动数据采集、实时显示．以及远程操控各现场测试数据的本地和异地存储、在线报警、终止现场采集等,并可进行远程数据分析与处理,实现了远程共享化学虚拟仪器资源与设备。     

基于LonWorks现场总线的液位远程监控系统

介绍了一种基于LonWorks现场总线技术、公用电话网和Modem技术的储液罐液位远程监控系统,实现了对现场储液罐内液位和液压的采集、处理、控制和远程通信。阐述了该系统的功能,并给出了系统的硬件组成及软件设计。该系统设计简单、使用方便;具有较好的灵活性和可靠性,有一定的推广价值。     

西门子TRANSDATA通讯系统

引言 数据远程处理系统,除采用以大型计算机为中心,配有大量本地和远程外围设备的集中式系统外,将多台计算机连接成网组成分布式处理系统的应用越来越广泛。这种方式将数据处理能力和数据存储手段移近工作现场,分布在很大的区域里(即所谓“智能分散”)。在这种分布式远程处理系统中,数据通讯起着枢纽作用,因为只有通过数据通讯系统才能对分布的智能进行必要的调度。     

无线数传技术在远程心电监护系统中的应用

心脏病是严重威胁人类健康和生命的主要疾病之一.现有的远程心电监护系统存在难以充分释放医院的专业资源、服务范围有限等不足,将心电监护从医院扩展到家庭,实现远程监护具有非常重要的现实意义.本文讨论了利用无线数传技术实现远程心电数据采集的解决方案,使用PTR2000无线通信模块设计了便携式心电数据采集发送盒和心电数据接收转发器,实现了对病人心电数据的远程采集和传输,为通过宽带网实现病人心电数据的远程采集和传输创造了条件.     

便携式远程脉搏采集系统的设计

远程脉搏采集系统能在不影响病人日常生活的情况下实时测量到病人的脉搏信号,并在脉率不正常时进行报警,家属或医生就可以及时进行救助,尽最大可能挽救病人的生命,它的研究对心脑血管病人有重大意义;文中以16位单片机MSP430F2274作为下位机,设计了一种便携式远程脉搏信号采集系统;该系统能够采集脉搏信号并利用蓝牙技术无线传输信号到PC机,然后利用VC++6.0语言编写程序,实现了脉搏信号的采集、脉搏波形的实时显示、脉率计算和语音报警等功能,同时利用Internet网络采用Winsock进行脉搏信号的远程传输,实现医生和病人(或者病人家属)进行语音、文字聊天等。     

应用GPRS技术的温度远程监控系统

随着无线网络通信技术的发展,通信技术在远程监控系统中得到了越来越广泛的应用。系统设计了基于GPRS技术的冬季北方室内温度远程监控系统。该系统借助于单片机STC12C5A08S2从现场获取温度信息,通过GPRS及Internet网络传送到远程监控中心,在监控中心使用基于C#和SQL Server2000开发的窗体程序对温度信息进行处理,可以通过该程序直接获取各采集点的实时状况以及历史数据,还可根据需求实现打印、查询和统计等功能,为监控分析现场数据提供便利,同时还可根据需要发送相关的命令,对现场温度实现远程控制。     

远程心电监测系统的研究

提出了一种以S3C2440处理器和嵌入式操作系统Linux为基础的远程心电监测系统,介绍了系统实现方法和软硬件设计。该系统能够对心电信号进行实时采集处理和显示,而且可以通过GPRS无线传输模块将处理好的心电数据发送到远程计算机,适用于医院、康复中心和户外监护,帮助医生诊断病人病情。     

Developing a vision-based auto-recharging system for mobile robots

This article describes a vision-based auto-recharging system that guides a mobile robot moving toward a docking station. The system contains a docking station and a mobile robot. The docking station contains a docking structure, a control device, a charger, a safety detection device, and a wireless RF interface. The mobile robot contains a power detection module (voltage and current), an auto-switch, a wireless RF interface, a controller, and a camera. The controller of the power detection module is a Holtek chip. The docking structure is designed with one active degree of freedom and two passive degrees of freedom. For image processing, the mobile robot uses a webcam to capture a real-time image. The image signal is transmitted to the controller of the mobile robot via a USB interface. We use an Otsu algorithm to calculate the distance and orientation of the docking station from the mobile robot. In the experiment, the proposed algorithm guided the mobile robot to the docking station.     

Plug into the Online Database and Play Mobile Web 2.0

The next generation of open mobile device platforms will use wireless broadband access technology and human-computer interface advances to allow remote plug and play with Web 2.0 applications. A case study of mobile commerce reveals a complete workflow, from user log in to entry creation to barcode scanning.     

A user-centric and context-aware solution to interface management and access network selection in heterogeneous wireless environments

This paper investigates issues related to handover management of mobile terminals in heterogeneous wireless environments. The mobile terminals are equipped with multiple wireless radio interfaces and have a limited lifetime battery. Seamless mobility and power utilization efficiency become two important aspects of the handover management. We propose in this work user-centric network selection, power-saving interface management and adaptive handover initiation solutions at the terminal side to support seamless terminal-initiated and terminal-controlled vertical handover. The proposed access network selection is situation-aware and application-aware to suit different communication contexts. It enables terminals to select the most suitable access network according to various access network characteristics. Multiple wireless interfaces of a terminal device are handled in both idle and active communication modes to optimize the power consumption. We also address an adaptive handover initiation scheme to assist the service continuity. We conduct simulations and analyses of the proposed solutions to show their suitability and their efficiency.     

MAWA:基于移动Agent的一种高效可靠无线Web访问机制

在无线移动环境中进行Web访问承受着更多的技术挑战,移动设备在此环境中进行无线Web访问时需有一种高效且可靠的机制给予支持,以克服由于移动设备自身硬件能力的有限,移动设备自身的物理移动及无线网络的不可靠性而带来的困难.提出一种基于移动Agent的无线Web访问机制MAWA. 该机制利用移动Agent作为移动设备与Web服务器之间交互的中介,有效避免移动设备不必要的Web页面更新提交操作,从而节省了其无线网络连接开销,与其他协议相比有着较高的执行效率;同时该机制还可有效支持移动设备进行无线Web访问时在基站间的切换,及运行期间发生故障后的状态恢复,从而确保了移动设备运行过程的可靠性.最后通过实验分析了MAWA机制的可靠性与高效性.     

Content and Web services converge: a unified user interface

The smart phone is thus a new class of computing device, correspondingly demanding a new class of user interface. The smart phone is truly personal t's carried by just one individual and at all times. However, we need to personalize it not only for the individual user but also for the wireless operator delivering a custom bundle of wireless services. The new UI must be easy to customize, update, and maintain. We propose a new UI solution in which the Web browser broadens its role beyond browsing external content to also function as the handset UI. Seen in context, this is only the next step in the continuing evolution of today's wireless ecosystem. Here we describe trends in mobile Web browsing that culminate in the browser as the handset UI.     

Cooperation among peers in an ad hoc network to support an energy efficient IM service

Continuous wireless wide area network (WWAN) access for mobile devices in future pervasive systems may be limited by battery power and may generate extensive data telecommunication costs. In this paper, we develop a new message notification protocol (MNP) to enable mobile users to maintain a continuous presence at their instant messaging (IM) server while avoiding long, idle connections. In MNP, mobile users cooperatively share a single message notification channel to reduce users’ telecommunication charges and extend a device’s battery life. A device may turn off its WWAN interface for most of the time to save power, and only needs to contact the IM server when needed. Precise group information does not need to be maintained by a mobile device. Message notification exchanged between the IM server and the peer group is represented by a compressed Bloom filter to further reduce the protocol overhead and provide additional privacy and security. The results of performance evaluation show that the MNP protocol could be able to save significant energy consumed in a mobile device.     

融合Ad-hoc和蜂窝网络的中继设备设计

为了改善现有移动蜂窝网络在人口密集区域时常出现拥塞的现象,对Ad-hoc和蜂窝网络融合技术进行了研究,提出了一种融合Ad-hoc和蜂窝网络的中继设备实现方案.该方案采用S3C2440控制芯片、无线通信模块和GPRS通讯模块作为硬件开发平台,分析了硬件接口设计和配置,设计了软件系统,实现了Ad-hoc和GSM网络的互联.提出了一种改进的基于信号强度的切换算法,实现了异构网络无缝切换.通过搭建平台对设备进行了测试,结果表明了该设计的可行性.     

基于MANET的移动节点RTU硬件系统设计与实现

近年来,MANET网络发展迅速,在紧急救援、军事通信等众多领域均有应用.论文以大型移动设备所组成的MANET网络为背景,以传感信息交互处理为需求,设计并实现了移动设备节点的数据处理与通信控制硬件系统.系统采用以ARM Cortex M0内核为MCU的嵌入式系统,电路板整体采用模块化设计,含供电系统、时钟系统、SDRAM、Flash、无线通信端口、串行接口、复位系统、调试接口、USB端口等电路模块.在节点移动的实验条件下验证了所设计系统的可用性与可靠性,能够满足开发项目的通信需求.     

A mobile learning system for scaffolding bird watching learning

Abstract This paper develops a mobile learning system for scaffolding students learning about bird-watching. The aim is to construct an outdoor mobile-learning activity using up-to-date wireless technology. The proposed Bird-Watching Learning (BWL) system is designed using a wireless mobile ad-hoc network. In the BWL system, each learner has a PDA (Personal Digital Assistant) with a Wi-Fi-based (IEEE 802.11b) wireless network card. The BWL system offers a mobile learning system which supports the students learning through scaffolding. The aim of a formative evaluation was twofold: to explore the possible roles and scaffolding aids that the mobile learning device offers for bird-watching activities and to investigate whether student learning benefited from the mobility, portability, and individualisation of the mobile learning device.     

嵌入式无线移动设备的开放式远程现场升级

在嵌入式设备中使用带ISP功能的元件,使得设备具有远程现场升级能力。在讨论嵌入式无线移动设备远程现场升级的开放性,并与有线设备升级进行差异比较的基础上,提出与无线移动设备相适应的升级模式集合。以基于GPS/GIS/GSM的无线车载设备作为升级实验对象,通过对升级方案和升级实验数据的详尽叙述,验证了独立型升级模式的正确性和有效性。