无线传感器网络硬件测试系统

随着无线传感器网络应用研究的不断深入,构建能反映应用环境特征、网络实际特性的测试平台越来越受到重视.在对无线传感器网络测试系统的应用需求、关键问题进行深入分析的基础上,并结合实验室研究需要,提出了测试系统的硬件设计方案,可支持无线传感器网络的干扰测试、定位研究、路由协议优化及应用开发等.详细介绍了测试系统的架构及各硬件模块的设计.通过ZigBee组网、数据采集测试、GPRS远程数据传输测试等实验说明各模块硬件设计合理,能满足测试平台的各类研究、应用开发.     

无线传感器网络节点的设计

无线传感器网络是一种以无中心节点的全分布系统。通过随机投放的方式,众多传感器节点被密集部署于监控区域。这些传感器节点集成有传感器、数据处理单元和通信模块,它们通过无线信道相连,自组织地构成网络系统。传感器节点借助于其内置的形式多样的传感器,测量所在周边环境中的相关信号,传感器节点间具有良好的协作能力,通过局部的数据交换来完成全局任务。     

基于MSP430与CC2420的无线传感器网络的硬件节点设计

传感器节点是组成无线传感器网络的基本单位.本文通过对传感器硬件节点的分析,以射频芯片CC2420为核心,设计了一种基于CC2420与MSP430单片机的无线传感器网络的硬件节点设计方案。     

基于CC2431的无线传感器网络节点的设计

CC2431是Chipcon公司新推出的符合Zigbee标准并具有定位功能的无线射频芯片,设计该节点可以为无线传感器网络提供较高质量的硬件定位功能.在简要介绍无线传感器网络及其节点的特征后,详细介绍了CC2431的性能及特征,并结合CC2431的外部接口及电气特性,利用模块化的设计方法定制节点中的各个功能模块,最终实现了集处理器8051与通信模块于一体的基于CC2431的无线传感器网络节点.     

气象观测无线传感器网络节点设计与实现

随着现代化的通信技术的不断发展,我国在无线通信等技术领域当中都取得了相当大的成就,在现代化的气象观测技术的的应用过程当中,也实现了最大限度的自动化和信息化水平的不断提高,因此无线传感器的技术已经成为了一门全新的信息技术,并被广泛地应用在现代化的农业以及其各方面的产业当中.同时需要针对现阶段的气象行业当中的无线网的感应应用等各做出充分的研究,在本文当中,首先对无线传感器网络的节点进行概述;其次对气象观察的无线传感器的网络节点做出全面的分析;最后对其节点的部署以及测试做出规范性的探讨.     

CC1010芯片在无线传感器网络节点设计中的应用

无线传感器网络,可以在一些特殊的场合实现信号的采集、处理和发送.在简要介绍无线传感器网络节点结构的基础上,对Chipcon公司开发的CC1010射频芯片的功能特点进行了研究,结合其工作原理与应用电路,阐述了它在无线传感器网络节点硬件设计中的应用.     

基于CC1110的无线传感器网络节点设计

无线传感器网络是当今信息领域的研究热点,有着广泛的应用前景。根据无线传感器网络的特点,以CC1110芯片为核心设计了一种低功耗无线传感器网络节点。在介绍CC1110的基础上,详细阐述了传感器节点设计及实现过程,包括硬件设计和软件设计,提供了一种无线传感器网络节点设计实现方案。在性能实验测试中,取得了良好的测试效果,给将来研究无线传感器网络应用提供了高性能的节点。     

基于果园环境信息监测的无线传感器网络节点设计

针对果园环境远程实时监测的需求,设计了MCU芯片MSP430F149、射频芯片nRF2401及各种传感器接入电路构成的具有多种果园环境信息监测的无线传感网络节点。该节点系统采集果园微气象信息(包括温度、湿度、光照强度等),通过节点之间的无线通信,以多跳的方式传给上位监控机,可实现果园环境信息的远距离实时监测。     

IPv6无线传感器网络节点的设计研究

提出了一种IPv6无线传感器网络节点的设计,此系统符合无线传感器网络节点设计原则。硬件系统设计硬件系统充分利用了芯片Atmega128、CC2420和LM60的功能,软件设计通过引入状态机进行系统模式调度,从而实现了系统的独立运行。为了测试系统的正确性,对传感器节点的数据包接收率、平均延迟时间和平均消耗能量进行了测试,测试结果表明,此设计方法安全可行,具有很好的实用性。     

基于QI标准的无线充电传感器网络节点设计

本文为无线传感网络节点设计无线充电电路,采用基于QI标准的IC芯片,通过发射线圈和接收线圈之间的耦合,借助电磁感应完成能量传输,实现无线充电,并设计PCB板进行测试。实验证明该方案可行,且具有较高的应用价值。     

基于ZigBee油田无线传感器网络节点的研究与设计

为了实现无线传感器网络技术在油田的实际应用,提出了一种基于ZigBee通信协议和JN5139芯片为基础的设计理念以提高数据采集和传输的可靠性,完成无线传感技术的软硬件设计。本文以江苏刘陆油田为实践运用背景,对应用中的网络数据可靠性进行了理论分析和工程测试,实际应用表明,该系统具有操作简便、测试准确的特点,达到了设计要求。     

基于移动sink的无线传感器网络数据采集方案

对无线传感器网络的数据采集问题进行了研究,提出了一种基于可移动sink节点的数据采集方案DCSR。DCSR包括2个阶段,第1个阶段根据传感器节点的分布情况确定一批采集点,第2个阶段使用量子遗传算法求解出经过采集点的最短回路。计算完之后,sink沿着这条回路运动,周期性进行数据采集。理论分析和仿真实验表明,DCSR的性能较好,采集的数据量也更多。     

无线传感器网络节点定位技术

无线传感器网络（Wireless Sensor Network,WSN）在许多领域有广泛的应用,无线传感器网络中节点位置对无线传感器网络的应用有重要的影响,没有位置属性的信息是无价值的,定位技术是无线传感器网络的重要研究方向之一.依据测距和非测距的分类方法,介绍节点定位技术的基本原理和方法及当前的发展状况,最后对节点定位技术的发展方向作展望.     

传感器网络基于DTW的多小波压缩算法

提出传感器网络环境下基于DTW的多小波数据压缩算法。首先研究汇聚节点中异步数据点—点对的对应关系,设计迭代算法求出具有最大相关性的DTW弯曲路径。接着提出最佳匹配点选择算法,通过DTW弯曲路径中一对一数据点—点对来预测异步数据向量间的函数关系,获取最佳匹配点,得到具有最大相关性的传感数据矩阵。然后设计多小波变换,利用传感数据矩阵的相关性来压缩数据,同时解决数据矩阵的行列不对称问题。实验结果表明,所提出的算法在能量聚集比、重构精度和运行时间等压缩性能指标上优于经典的分布式小波压缩算法。     

Distributed trajectory design for data gathering using mobile sink in wireless sensor networks

Several studies have demonstrated the benefits of using a mobile sink (MS) to reduce energy consumption resulting from multi-hop data collection using a static sink in wireless sensor networks (WSNs). However, using MS may increase data delivery latency as it needs to visit each sensor node in the network to collect data. This is a critical issue in delay-sensitive applications where all sensed data must be gathered within a given time constraint. In this paper, we propose a distributed data gathering protocol utilizing MS for WSNs. The proposed protocol designs a trajectory for the MS, which minimizes energy consumption and delay. Our protocol operates in four main phases: data sensing, rendezvous point (RP) selection, trajectory design, and data gathering. In data sensing, a number of deployed sensor nodes keep sensing the target field for a specific period of time to capture events. Then, using a cluster-based RP selection algorithm, some sensor nodes are selected to become RPs based on local information. The selected RPs are then used to determine a trajectory for the MS. To do so, we propose three trajectory design algorithms that support different types of applications, namely reduced energy path (REP), reduced delay path (RDP), and delay bound path (DBP). The MS moves through the constructed path to accomplish its data gathering according to an effective scheduling technique that is introduced in this work. We validate the proposed protocol via extensive simulations over several metrics such as energy, delay, and time complexity.     

Energy-efficient node deployment strategy for wireless sensor networks

To balancing energy consumption in wireless sensor networks, we proposed a fixed time interval node broadcasting scheme under variational acceleration straight-line movement model. Simulation results show that the approach proposed in this paper has a superior performance on energy consumption balance compared to uniform broadcasting methods.     

无线传感器网络节点定位技术综述

无线传感器网络在许多领域有着重要的科研和使用价值,网络中传感器节点自身定位可为无线传感器网络的很多应用提供基础信息,是重要研究方向之一.从无线传感器网络节点定位技术的研究意义与应用价值出发,介绍了节点定位技术的基本原理与方法,并讨论了定位算法的评价标准,最后对节点定位技术的发展方向进行了展望.     

Secure data aggregation in wireless sensor networks using homomorphic encryption

In a Wireless Sensor Network (WSN), aggregation exploits the correlation between spatially and temporally proximate sensor data to reduce the total data volume to be transmitted to the sink. Mobile agents (MAs) fit into this paradigm, and data can be aggregated and collected by an MA from different sensor nodes using context specific codes. The MA-based data collection suffers due to large size of a typical WSN and is prone to security problems. In this article, homomorphic encryption in a clustered WSN has been proposed for secure and efficient data collection using MAs. The nodes keep encrypted data that are given to an MA for data aggregation tasks. The MA performs all the data aggregation operations upon encrypted data as it migrates between nodes in a tree-like structure in which the nodes are leafs and the cluster head is the root of the tree. It returns and deposits the encrypted aggregated data to the cluster head after traversing through all the intra cluster nodes over a shortest path route. The homomorphic encryption and aggregation processing in encrypted domain makes the data collection process secure. Simulation results confirm the effectiveness of the proposed secure data aggregation mechanism. In addition to security, MA-based mechanism leads to lesser delay and bandwidth requirements.     

Energy equilibrium based on corona structure for wireless sensor networks

Although multi‐hop routing can reduce communication consumption and extend network scale, energy hole is unavoidable to appear because of the relay nodes being overloaded due to take more tasks. In this paper, we formulate the energy equilibrium problem as an optimal corona division, where data fusion and data slice are both considered in data gathering process. For a circular multi‐hop sensor network with uniform node distribution and constant data reporting, we demonstrate that the energy equilibrium of the whole network is unable to be realized no matter whether data fusion and data slice are adopted. However, the maximum energy equilibrium for a given circular area can be achieved only if the area increases in geometric progression from the outer corona to the neighbor inner corona except for the outermost one. Moreover, we use a zone‐based allocation scheme to guarantee energy equilibrium of intra‐corona. The approach for computing the optimal parameters is presented in terms of maximizing network lifetime. Based on the mathematical model, we propose an energy equilibrium routing based on corona structure (EERCS). Simulating results validate that EERCS can effectively achieve energy equilibrium and prolong the lifetime of network. Copyright © 2010 John Wiley & Sons, Ltd.