基于无线传感器网络的海水检测系统

针对海水检测周期长、范围小的特点,提出了使用无线传感器网络的海水指标实时在线检测方案。研究了精确检测的方法与算法,探讨了无线传感器网络节能路由协议。系统综合运用无线传感器智能信息处理技术、远程GPRS无线数据通信技术以及基于Internet显示平台的监测点管理查询技术,将功能相同或不同的传感器构成智能化传感器网络,从而全面提升了系统的自动化与监测水平。模拟实验结果表明系统具有良好的海水定量检测能力。     

基于蓝牙技术的无线传感器的设计

介绍了一种重要的测控数据采集装置——无线传感器数据采集装置。该装置采用最新的蓝牙技术、传感器采集技术和网络技术,主要实现了传感器采集数据的无线传输和远程监测功能。该装置运用传感器准确采集数据,经蓝牙实现无线传输,数据通过网络协议栈实现网页上的数据访问功能,可应用在远程监控系统中。该无线的传感器装置与有线的传感器装置相比,无线传感器能够更方便更实用地运用在生活中。整个过程运用了软件和硬件结合,实现了数据的无线传输和网络化访问监测和查看功能,方便人们在异地查看数据。     

GPRS在无线传感器网络远程通信中的应用

无线传感器网络是由多种类型节点组成的分布式网络.通用节点采用短距离的射频通信和中继完成更远距离的传输.为实现无线远程通信,采用通用分组无线业务(GPRS)公共无线网络.汇聚节点收集无线传感器网络采集的数据,通过网关节点接入GPRS公用无线移动网络.监控中心通过Internet和GPRS网络获取无线传感器网络的远程数据.介绍了无线传感器网络测量系统的组成,在嵌入式系统中接入GPRS的网络接入方法,给出了实验结果.     

基于无线传感器网络的生命状态监控系统的设计

基于无线传感器网络的生命状态监控系统是一种现代化远程医疗监控系统,它利用医疗传感器作为生理信息采集接口,利用无线通信技术把采集到的生理数据通过网关再传送到远程监控中心,在远程监控中心对生理数据进行分析诊断,从而实现远程监控和远程医疗。本课题针对医疗领域的应用,分析了无线传感器网络硬件平台,研制了一个具有通用性能的基于无线传感器网络的硬件平台,研究和探索了其在能耗、无线通信协议、硬件设计等方面的应用,力求本课题所涉及的无线传感器网络节点具有很好的可扩展性、可操作性和实用性。     

基于无线传感器的温室大棚智能监控系统设计

当前温室大棚存在监测困难、有线传输系统成本过高等问题。为实现对温室大棚数据的有效监控,文章基于无线传感器的技术优势,设计出温室大棚智能监控系统。作者通过建立无线传感器网络并利用温湿度及气体传感器对温室大棚内的环境参数进行测算,通过无线传感器网络实现了数据高速传输,提高了温室大棚环境监测的智能性和可靠性,降低了温室大棚的监控成本,实现了真正意义上的远程监控。     

无线传感器网络管理平台的设计与实现

传感器节点信息的获取、处理、实时显示,以及无线传感器节点的网络拓扑管理是无线传感器网络应用的关键.本系统采用了基于Zigbee技术的组网方案,进行了系统的网络架构研究,设计了检测系统终端节点的硬件平台和图形化人机交互界面,在此基础上构建无线传感器网络监控平台.该平台能及时显示节点信息以及网络拓扑关系,并能实现信息数据管...     

海水养殖环境水质实时监测系统的设计

海水养殖环境水质监测通常采用人工采样、实验室分析方法,存在实时性差、实验环境与实际环境有差异等问题。本文提出一种基于无线通信技术的远程水质实时监测方法。采用无线传感器网络作为主要通信手段,实现对养殖环境水质的远程实时监测。实验表明,该系统运行可靠、操作方便。     

基于无线传感器网络的交通信息采集系统研究

实现了一种基于无线传感器网络的交通信息采集系统,采用磁阻传感器,通过测量地磁的变化来检测车辆信息,用无线传感器网络传输数据,该系统不需要大规模挖开路面铺设车辆检测器,具有安装简易,维修方便等优点。同时采用B／S结构实现了交通信息的管理,用户可以在远程终端利用浏览器在线监测,实时分析交通信息数据,并进行网络监控和维护。     

基于ZigBee无线传感器网络的远程数据监测的设计

将无线传感网络技术与Zig Bee技术进行融合,使用Zig Bee技术搭建无线传感网络,并建立基于Zig Bee无线传感器网络的远程数据监测系统。以楼宇供暖远程监测系统为例,对基于Zig Bee无线传感网络的远程数据监测系统设计进行说明。对Zig Bee节点的核心组件PIC18LF4620处理器和CC2420无线射频模块引脚连接电路进行设计;对Zig Bee无线传感网络中处理器和模块的软件程序以及上位机组态监测软件进行设计。通过在目标楼宇内成功安装调试该文研究的楼宇供暖远程数据监测系统,使得全天候各个供暖时段的室温均在要求的18℃以上,基本能够达到室温均衡,节约了供暖公司的成本和资源。     

基于SOPC技术的无线远程监控系统

介绍了基于SOPC技术的无线远程监控系统的设计与实现.现场设备可采集多个防火防盗传感器状态数据并对现场拍照,通过无线通信传输信息到监控中心,如遇事故可控制现场报警器发出警报并使用无线模块报警.     

Target localization based on energy considerations in distributed sensor networks

Wireless distributed sensor networks are important for a number of strategic applications such as coordinated target detection, surveillance, and localization. Energy is a critical resource in wireless sensor networks and system lifetime needs to be prolonged through the use of energy-conscious sensing strategies during system operation. We propose an energy-aware target detection and localization strategy for cluster-based wireless sensor networks. The proposed method is based on an a posteriori algorithm with a two-step communication protocol between the cluster head and the sensors within the cluster. Based on a limited amount of data received from the sensor nodes, the cluster head executes a localization procedure to determine the subset of sensors that must be queried for detailed target information. This approach reduces both energy consumption and communication bandwidth requirements, and prolongs the lifetime of the wireless sensor network. Simulation results show that a large amount of energy is saved during target localization using this strategy.     

Maximizing the lifetime of energy‐constrained cooperative spectrum sensing sensor network

Adding the cognitive capability to wireless sensor networks allows the sensors to monitor the spectrum and identify the spectrum holes to operate in different frequencies according to the radio environment which result in better spectrum utilization. Spectrum sensing is a main component in any cognitive radio network. In this paper, we propose a new cooperative sensing scheme based on energy detection for cognitive sensor networks which is constrained by the energy limitation of the wireless sensor elements. The proposed scheme minimizes the sensing energy for individual sensor and carefully selects the suitable participant sensors in each cooperative sensing process. This results in maximizing the lifetime of energy‐constrained wireless sensor networks. The proposed scheme also takes into consideration the constraints on the detection accuracy. The simulation results show that the proposed scheme prolonged the lifetime of the cognitive network, makes efficient usage of available spectrum by secondary users, and satisfy the target detection performance.     

高效的攻击检测与数据融合算法

给出了一种高效的无线多媒体传感器网络攻击检测和数据融合算法EIDSART。该算法从节点的多元属性方面对节点行为特征进行界定,通过选择合适的邻居节点集合,可以运用于任意规模的多媒体传感器网络;另外,在经过精确检测攻击行为的情况下,对传感数据进行了融合,降低了网络通信开销。仿真结果表明,EIDSART在攻击检测精度和误报率等方面具有优势,并能得到精确的数据融合结果。     

The Energy-Aware Operational Time of Wireless Ad-Hoc Sensor Networks

Sensor networks are deployed in numerous military and civil applications, such as remote target detection, weather monitoring, weather forecast, natural resource exploration and disaster management. Despite having many potential applications, wireless sensor networks still face a number of challenges due to their particular characteristics that other wireless networks, like cellular networks or mobile ad hoc networks do not have. The most difficult challenge of the design of wireless sensor networks is the limited energy resource of the battery of the sensors. This limited resource restricts the operational time that wireless sensor networks can function in their applications. Routing protocols play a major part in the energy efficiency of wireless sensor networks because data communication dissipates most of the energy resource of the networks. This paper studies the importance of considering neighboring nodes in the energy efficiency routing problem. After showing that the routing problem that considers the remaining energy of all sensor nodes is NP-complete, heuristics are proposed for the problem. Simulation results show that the routing algorithm that considers the remaining energy of all sensor nodes improves the system lifetime significantly compared to that of minimum transmission energy algorithms. Also, the energy dissipation of neighboring nodes accounts for a considerable amount of the total energy dissipation. Therefore, a method that reduces the energy dissipation by notifying the neighboring nodes to turn off their radio when not necessary is proposed. By reducing the unnecessary energy dissipation of the neighbors, the lifetime is increased significantly.     

基于无线传感网络的移动机器人通信研究

文章对无线传感网络在机器人设计中的应用进行了研究,提出了一种基于Ad hoc网络的分布式无线令牌环协议的机器人通信系统实现方案,分析了其在机器人通信系统应用中的可行性.文中给出了基于无线传感网络的机器人通信系统的软硬件设计方案,并对其在移动机器人通信系统中的应用问题进行了探讨,最终提出了无线传感器网络应用于移动机器人通信系统的实现方法.     

无线传感网络再编程研究

无线传感网络再编程通常作为独立于应用程序的服务实现在传感节点的操作系统之上:也是通过无线信道有效地管理和维护传感网络的一个重要功能.本文在介绍再编程面临的挑战基础上,分类研究工各种再编程协议的传播方式与可靠性,指出了安全、快速、可靠地对部署好的传感网络再编程需要解决的几个问题,提出了未来的几个研究方向与重点.     

Modelling the energy cost of a fully operational wireless sensor network

Several applications have been proposed for wireless sensor networks, including habitat monitoring, structural health monitoring, pipeline monitoring, precision agriculture, active volcano monitoring, and many more. The energy consumption of these applications is a critical feasibility metric that defines the scope and usefulness of wireless sensor networks. This paper provides a comprehensive energy model for a fully functional wireless sensor network. While the model uses toxic gas detection in oil refineries as an example application, it can easily be generalized. The model provides a sufficient insight about the energy demand of the existing or proposed communication protocols.     

无线传感器网络自适应目标跟踪节点调度算法

在无线传感器网络中,设计合理的节点调度算法是提高网络感知能力、降低系统能耗的关键。在分析节点能耗模型的基础上,针对移动目标跟踪型网络应用,提出一种高能效的无线传感器网络自适应节点调度算法ANSTT。该算法根据节点对移动目标的感知能力,以及节点的相对剩余能量水平,自动调整节点工作模式。仿真实验表明,ANSTT算法在维持低感知延时、高目标感知率的同时,可有效降低系统能耗,延长网络寿命。     

无线传感器网络入侵检测系统

无线传感器网络与传统网络存在较大差异,传统入侵检测技术不能有效地应用于无线传感器网络。文中分析了无线传感器网络面临的安全威胁;总结了现有的无线传感器网络入侵检测方案;在综合现有无线传感器网络入侵检测方法的基础上,提出了一种分等级的入侵检测系统,该入侵检测体系结构通过减少错报能检测到大多数的安全威胁。