浅谈无线传感器网络在智能电网用户侧管理中的应用

随着我国建设智能电网目标的提出,智能电网用户侧管理成为人们的研究重点,本文在研究了无线传感器网络、宽带无线接入网络以及用户侧管理等相关知识的基础上,提出了无线传感器网络在智能电网用户侧管理中的应用方案,该方案以无线传感器网络为基础,并将电网的智能电表系统设备及其运行信息集成一体,对用户侧用电信息和设备运行状态进行安全监控与计量,并使用户与电力企业进行智能交互,具有很好的应用前景和推广价值。     

浅谈无线传感器网络在智能电网用户侧管理中的应用

随着我国建设智能电网目标的提出,智能电网用户侧管理成为人们的研究重点,本文在研究了无线传感器网络、宽带无线接入网络以及用户侧管理等相关知识的基础上,提出了无线传感器网络在智能电网用户侧管理中的应用方案,该方案以无线传感器网络为基础,并将电网的智能电表系统设备及其运行信息集成一体,对用户侧用电信息和设备运行状态进行安全监控与计量,并使用户与电力企业进行智能交互,具有很好的应用前景和推广价值.     

无线传感器网络技术概述

无线传感器网络是目前计算机网络、无线通信和微电子技术等领域的研究热点。但很多人对无线网络并不是很了解。本文就是基于此,从无线传感器网络的结构、特点以及关键技术方面介绍,对无线传感网络的研究趋势作了总结。让读者对无线传感网络有个比较直观的认识了解。     

可充电的WSNs网络SIC干扰管理工作策略研究

随着无线传感器网络的规模不断扩大,开放信道中的通信干扰与节点能源有限问题严重制约传感器网络性能。研究在星型拓扑结构下可充电无线传感器网络的多用户介入通信干扰管理技术,旨在提高系统吞吐量、频谱和功率利用率,延长网络生命周期。首先针对多用户介入的通信干扰管理技术提出一种启发式的功率分类算法实现并发通信传感器节点的分簇,并对其分类效果进行验证。其次,结合并发无线通信中节点行为特征,引入无线能量补给设备,构建以最大化能量补给设备驻站时间比为目标的跨层优化问题,并将其转化为具有等优性的线性规划问题,进而求解得到无线传感器节点和无线能量补给设备的优化工作策略。仿真和实验证明,在维持传感器网络生命周期的前提下,采用并发通信的干扰管理策略和无线能量补给后,网络的通信能力和功率利用率都得到提升,该仿真场景下充电小车驻站时间占比η_s能达到47%。     

低功率非侵入式无线传感电源设计

研究了一种适用于大型机电设备外部环境监测的低功率非侵入式无线传感器用电源。利用电缆近场空间磁场能量感应原理,设计了无线传感器用电源的能量获取电路、功率调理电路和能量管理功能。利用有限元工具对能量传输过程进行仿真并设计线圈机械和电气参数;设计了带有能量前馈的调理电路及其启动方法。实验表明,在负载电缆有高频电流纹波的情况下,该低功率非侵入式无线传感器用电源可以自启动,并输出可以为无线传感器供电的稳定电压。     

全光纤电流传感器突变故障诊断技术研究

针对当前发生突变型故障时无法准确区分电力网络故障和电流传感单元故障的问题,提出采用双调制式光路结构,并利用温度信号缓变特性实现全光纤电流传感器故障诊断的方法。在分析双调制式全光纤电流传感器工作机理的基础上,应用正弦波作为调制信号,采用能量系数及调制深度表征故障特征,并进行仿真分析;最后通过搭建实验系统进行实验,实验结果表明,采用本文方案能够准确区分电力网络故障与传感单元故障。     

无线传感器网络节点的系统设计

节点的系统设计技术是组建无线传感器网络的关键技术之一.本文研究了无线传感器网络节点的系统设计与实现方法.根据无线传感器网络的特点提出了节点系统设计的重要指标,并根据这些指标进行系统结构设计和硬件选型.分别阐述了节点板和传感器板的硬件设计,并详细讨论了基于ATmega128L和CC1000的通信电路设计和控制软件结构.最后给出了I/O扩展接口的设计.     

基于无线传感器网络的桥梁结构健康监测系统

基于桥梁结构健康监测和无线传感器网络基本概念,设计出用于桥梁结构健康监测的无线传感器节点模型和软硬件结构体系。硬件基于Intel公司研制的Imote2平台,软件采用TinyOS操作系统。最后对基于无线传感器网络的桥梁结构健康监测系统的优势进行了分析与总结。无线传感器网络以其覆盖范围广、测量精度高和分布式、自组织等特点解决了有线系统的一些固有缺点,还可解决结构健康监测系统鲁棒性、自身寿命以及数据泛滥等问题。     

智能配电网通信实时性与可靠性QoS路由机制研究

为建立满足智能配电网通信可靠性要求下的实时性路由机制,需要分析电力配电网结构以及电力配电网通信的无线传感器网络结构特点;给出智能配电网高性能通信无线传感器网络信息传输路径选择模型;分析链路失效模式,对网络节点的延时性、可靠性进行赋权;提出路径选择数学模型,对路径求解并将问题简化;最后对算例及应用实例进行求解。分析结果表明:该模型和算法原理简单、计算方便、判断结果准确,能很好的平衡可靠性与实时性对智能电网无线传感器网络信息传输的影响、可提高智能电网无线传感器网络信息传输的可靠性和实时性。     

q-composite密钥管理方案的研究与改进

密钥管理是无线传感器网络研究中最重要最基本的问题,好的密钥管理方案为无线传感器网络提供安全可靠的保密通信,为无线传感器网络在特定领域的应用提供保障。为了扩展q-composite密钥管理方案的应用范围,针对它的不足之处,引进散列函数,对q-composite方案密钥池中的密钥进行散列,大大提高了网络安全连通度和抗节点俘获能力。通过实验结果验证,改进方案大大提高了q-composite方案的安全性能。     

Fault detection and eigenstructure optimization in IEEE 802.11 wireless sensor actuator networks for building automation

There are signs that wireless sensor actuator networks can be used in time‐sensitive industrial processes to reduce cable deployment and increase flexibility. This paper investigates the time‐sensitive fault detector design in wireless sensor actuator networks subject to random packet delays and packet losses. The impacts of wireless packet delays and losses are modeled as external unknown disturbances and a memory block is introduced to deal with the packet losses and long delays. A frequency component estimation method is proved to estimate the frequency of these unknown disturbances. An eigenstructure optimization method is proposed to enhance the fault detector's sensitivity to the fault and the robustness against the delays and packet losses. The fault detection performance in a wireless building automation system is demonstrated by hybrid MATLAB/NS2 simulation. Copyright © 2012 John Wiley & Sons, Ltd.     

Hierarchical Aggregation and Intelligent Monitoring and Control in Fault-Tolerant Wireless Sensor Networks

The primary idea behind deploying sensor networks is to utilize the distributed sensing capability provided by tiny, low powered, and low cost devices. Multiple sensing devices can be used cooperatively and collaboratively to capture events or monitor space more effectively than a single sensing device. The realm of applications envisioned for sensor networks is diverse including military, aerospace, industrial, commercial, environmental, and health monitoring. Typical examples include: traffic monitoring of vehicles, cross-border infiltration detection and assessment, military reconnaissance and surveillance, target tracking, habitat monitoring, and structure monitoring, to name a few. Most of the applications envisioned with sensor networks demand highly reliable, accurate, and fault-tolerant data acquisition process. In this paper, we focus on innovative approaches to deal with multivariable, multispace problem domains (data integrity, energy-efficiency, and fault-tolerant framework) in wireless sensor networks and present novel ideas that have practical implementation in developing power-aware software components for designing robust networks of sensing devices.     

基于无线传感器网络的配电线路故障定位方案

提出了基于无线传感器网络的故障定位系统方案。根据电力系统故障测距对测距装置的要求及无线传感器网络本身的特点,对该定位系统提出了要求。阐述了应用无线传感器网络进行故障定位的优势,推导了故障定位原理,设计了无线传感器网络定位系统结构,采用同步触发装置解决了同步性问题,借助于多路径可靠信息路由机制满足了网络可靠性要求。仿真结果表明,该路由机制既满足了可靠性要求又减少了网络开销。     

Biologically Inspired Cooperative Routing for Wireless Mobile Sensor Networks

Biological systems present remarkable adaptation, reliability, and robustness in various environments, even under hostility. Most of them are controlled by the individuals in a distributed and self-organized way. These biological mechanisms provide useful resources for designing the dynamical and adaptive routing schemes of wireless mobile sensor networks, in which the individual nodes should ideally operate without central control. This paper investigates crucial biologically inspired mechanisms and the associated techniques for resolving routing in wireless sensor networks, including Ant-based and genetic approaches. Furthermore, the principal contributions of this paper are as follows. We present a mathematical theory of the biological computations in the context of sensor networks; we further present a generalized routing framework in sensor networks by diffusing different modes of biological computations using Ant-based and genetic approaches; finally, an overview of several emerging research directions are addressed within the new biologically computational framework.     

WSN节点与PC机无线通信的方法研究

无线传感器网络和计算机网络的互联是信息高效处理的关键,如何实现传感器网络中的节点与PC机无线通信是其中的重要内容。本文介绍了无线传感器网络的基本结构,设计并实现了一种高效实用的PC机与无线传感器网络节点双向通信的有效方法。     

智能传感器及其应用探讨

本文主要介绍了智能传感器技术在不同领域的基本组成结构、标准、应用和一些最新发展.与传感器相比,智能传感器可以与连接在传感网络中的专门用途计算设备相互通信.通过使用无线传感器网络,可以对关键设备进行监视和远程管理,从而产生更好的系统性能,获得更好的决策能力,进行更好的控制.在各个领域都有智能传感器的应用,例如供应链物流,...     

Integration of Service-Level Monitoring with Fault Management for End-to-End Multi-Provider Ethernet Services

Assuring end-to-end service quality in a multi- provider Ethernet environment is a challenging task. Operation and maintenance issues have become more and more complex due to the gradual extension of the Ethernet technology from local- to wide-area networks and the increasingly frequent use of layer-2 virtual private networks. End-to-end Ethernet network management is currently under standardization, with a focus on connectivity fault management and performance management. However, none of the tools and research prototypes available to date integrate service-level monitoring with fault management functions such as event correlation or root cause analysis for interconnected Ethernet networks. In this paper, we address the issue by proposing an integrated service-level monitoring and fault management framework. Our event processing module can handle various events generated by network nodes or pollers. We also describe service-level monitoring and fault management methods that are fine-tuned for managing end-to-end multi- provider Ethernet services.     

一种无线传感器网络ZigBee通信平台的设计

本文简述了无线传感器网络的概念、体系结构及适用于无线传感器网络、自动控制领域的无线通信协议ZigBee;给出了一种无线传感器网络的通用节点通信平台的设计方案;详细介绍了系统硬件及软件的具体实现;并对设计过程中的低功耗策略做了简要分析。