In order to avoid internal attacks during data aggregation in wireless sensor networks, a grid-based network architecture fit for monitoring is designed and the algorithms for network division, initialization and grid...In order to avoid internal attacks during data aggregation in wireless sensor networks, a grid-based network architecture fit for monitoring is designed and the algorithms for network division, initialization and grid tree construction are presented. The characteristics of on-off attacks are first studied and monitoring mechanisms are then designed for sensor nodes. A Fast Detection and Slow Recovery (FDSR) algorithm is proposed to prevent on-off attacks by observing the behaviors of the nodes and computing reputations. A recovery mechanism is designed to isolate malicious nodes by identifying the new roles of nodes and updating the grid tree. In the experiments, some situations of on-off attacks are simulated and the results are compared with other approaches. The experimental results indicate that our approach can detect malicious nodes effectively and guarantee secure data aggregation with acceptable energy consumption.展开更多
In order to diagnose the working status of each module on sensor node and make sure the wireless sensor networks （WSN） work properly, the components of sensor node and their working characteristics are studied. An o...In order to diagnose the working status of each module on sensor node and make sure the wireless sensor networks （WSN） work properly, the components of sensor node and their working characteristics are studied. An on-line fault self-diagnosis method for sensor node is proposed. First, a flexible fault sensing circuit is designed as a state detection module on sensor node. Second, a self- diagnosis algorithm is proposed based on the hardware design and the failure analysis on sensor node. Finally, in order to ensure the WSN reliability, the voltage changes of each module working statuses can be observed using the state detection module and the faulty module will be found out timely. The experimental results show that this self-diagnosis method is suitable to sensor nodes in WSN.展开更多
Wireless Sensor Network(WSN)is a cornerstone of Internet of Things(IoT)and has rich application scenarios.In this work,we consider a heterogeneous WSN whose sensor nodes have a diversity in their Residual Energy(RE).I...Wireless Sensor Network(WSN)is a cornerstone of Internet of Things(IoT)and has rich application scenarios.In this work,we consider a heterogeneous WSN whose sensor nodes have a diversity in their Residual Energy(RE).In this work,to protect the sensor nodes with low RE,we investigate dynamic working modes for sensor nodes which are determined by their RE and an introduced energy threshold.Besides,we employ an Unmanned Aerial Vehicle(UAV)to collect the stored data from the heterogeneous WSN.We aim to jointly optimize the cluster head selection,energy threshold and sensor nodes’working mode to minimize the weighted sum of energy con-sumption from the WSN and UAV,subject to the data collection rate constraint.To this end,we propose an efficient search method to search for an optimal energy threshold,and develop a penalty-based successive convex approximation algorithm to select the cluster heads.Then we present a low-complexity iterative approach to solve the joint optimization problem and discuss the implementation procedure.Numerical results justify that our proposed approach is able to reduce the energy consumption of the sensor nodes with low RE significantly and also saves energy for the whole WSN.展开更多
提出了一种基于PSoC(可编程片上系统)的多参数无线传感器网络WSNs(wireless sensor net works)节点的设计方案,详细阐述了节点系统的硬件和软件实现。并将该无线传感器网络节点应用于输电线路的在线监测中,实际测试结果表明,采用了PSoC...提出了一种基于PSoC(可编程片上系统)的多参数无线传感器网络WSNs(wireless sensor net works)节点的设计方案,详细阐述了节点系统的硬件和软件实现。并将该无线传感器网络节点应用于输电线路的在线监测中,实际测试结果表明,采用了PSoC进行无线传感器网络节点的设计,不但缩小了节点的体积、简化了硬件和软件的设计,还降低了功耗、提高了稳定性、增强了抗干扰能提高。对输电线路状态监测的顺利开展具有十分重要的意义。展开更多
针对低功耗自适应集簇分层型协议LEACH(low energy adaptive clustering hierarchy)的节点生命周期短和能量消耗不平衡的问题,提出了一种LEACH协议的改进算法.算法的主要思想是考虑了节点的当前位置以及当前能量,从而可以使簇头的分布...针对低功耗自适应集簇分层型协议LEACH(low energy adaptive clustering hierarchy)的节点生命周期短和能量消耗不平衡的问题,提出了一种LEACH协议的改进算法.算法的主要思想是考虑了节点的当前位置以及当前能量,从而可以使簇头的分布更加均匀,延长节点的生命周期.对改进后的LEACH协议和原LEACH协议进行仿真,结果表明改进后的协议在生存时间上提高了40.7%,并增加了数据的发送量,减少了节点的能量消耗.展开更多
煤炭是当今社会的一种重要化石能源,煤机械设备是煤矿企业实现机械化的核心装备,对其工作状态进行监测具有重要的经济价值和安全需求。笔者综述了煤矿机械设备的主要故障类型、产生的原因以及故障的表现形式,根据信号采集时煤机设备是...煤炭是当今社会的一种重要化石能源,煤机械设备是煤矿企业实现机械化的核心装备,对其工作状态进行监测具有重要的经济价值和安全需求。笔者综述了煤矿机械设备的主要故障类型、产生的原因以及故障的表现形式,根据信号采集时煤机设备是否需要停机以及故障诊断的时效性,总结了机械故障诊断的方法及其特点;分析了不同类型无线网络传输技术、不同种类微能源技术的特点及其在煤矿中应用的可行性;同时,针对当前煤矿机械工作状态监测系统的不足,提出了基于微能源技术实现煤矿机械设备工作状态信息采集与发送系统自供电,结合Zigbee无线网络传输和通用分组无线服务技术(general packet ratio service,简称GPRS)通信方式实现煤矿机械设备工作状态监测系统自动化在线监测的发展方向。展开更多
基金This work was supported by the National Natural Science Foundation of China under Grant No. 60873199.
文摘In order to avoid internal attacks during data aggregation in wireless sensor networks, a grid-based network architecture fit for monitoring is designed and the algorithms for network division, initialization and grid tree construction are presented. The characteristics of on-off attacks are first studied and monitoring mechanisms are then designed for sensor nodes. A Fast Detection and Slow Recovery (FDSR) algorithm is proposed to prevent on-off attacks by observing the behaviors of the nodes and computing reputations. A recovery mechanism is designed to isolate malicious nodes by identifying the new roles of nodes and updating the grid tree. In the experiments, some situations of on-off attacks are simulated and the results are compared with other approaches. The experimental results indicate that our approach can detect malicious nodes effectively and guarantee secure data aggregation with acceptable energy consumption.
基金Supported by the Basic Research Foundation of Beijing Institute of Technology(200705422009)
文摘In order to diagnose the working status of each module on sensor node and make sure the wireless sensor networks （WSN） work properly, the components of sensor node and their working characteristics are studied. An on-line fault self-diagnosis method for sensor node is proposed. First, a flexible fault sensing circuit is designed as a state detection module on sensor node. Second, a self- diagnosis algorithm is proposed based on the hardware design and the failure analysis on sensor node. Finally, in order to ensure the WSN reliability, the voltage changes of each module working statuses can be observed using the state detection module and the faulty module will be found out timely. The experimental results show that this self-diagnosis method is suitable to sensor nodes in WSN.
基金supported in part by the National Nature Science Foundation of China under Grant 62001168in part by the Foundation and Application Research Grant of Guangzhou under Grant 202102020515.
文摘Wireless Sensor Network(WSN)is a cornerstone of Internet of Things(IoT)and has rich application scenarios.In this work,we consider a heterogeneous WSN whose sensor nodes have a diversity in their Residual Energy(RE).In this work,to protect the sensor nodes with low RE,we investigate dynamic working modes for sensor nodes which are determined by their RE and an introduced energy threshold.Besides,we employ an Unmanned Aerial Vehicle(UAV)to collect the stored data from the heterogeneous WSN.We aim to jointly optimize the cluster head selection,energy threshold and sensor nodes’working mode to minimize the weighted sum of energy con-sumption from the WSN and UAV,subject to the data collection rate constraint.To this end,we propose an efficient search method to search for an optimal energy threshold,and develop a penalty-based successive convex approximation algorithm to select the cluster heads.Then we present a low-complexity iterative approach to solve the joint optimization problem and discuss the implementation procedure.Numerical results justify that our proposed approach is able to reduce the energy consumption of the sensor nodes with low RE significantly and also saves energy for the whole WSN.
文摘提出了一种基于PSoC(可编程片上系统)的多参数无线传感器网络WSNs(wireless sensor net works)节点的设计方案,详细阐述了节点系统的硬件和软件实现。并将该无线传感器网络节点应用于输电线路的在线监测中,实际测试结果表明,采用了PSoC进行无线传感器网络节点的设计,不但缩小了节点的体积、简化了硬件和软件的设计,还降低了功耗、提高了稳定性、增强了抗干扰能提高。对输电线路状态监测的顺利开展具有十分重要的意义。
文摘针对低功耗自适应集簇分层型协议LEACH(low energy adaptive clustering hierarchy)的节点生命周期短和能量消耗不平衡的问题,提出了一种LEACH协议的改进算法.算法的主要思想是考虑了节点的当前位置以及当前能量,从而可以使簇头的分布更加均匀,延长节点的生命周期.对改进后的LEACH协议和原LEACH协议进行仿真,结果表明改进后的协议在生存时间上提高了40.7%,并增加了数据的发送量,减少了节点的能量消耗.
文摘煤炭是当今社会的一种重要化石能源,煤机械设备是煤矿企业实现机械化的核心装备,对其工作状态进行监测具有重要的经济价值和安全需求。笔者综述了煤矿机械设备的主要故障类型、产生的原因以及故障的表现形式,根据信号采集时煤机设备是否需要停机以及故障诊断的时效性,总结了机械故障诊断的方法及其特点;分析了不同类型无线网络传输技术、不同种类微能源技术的特点及其在煤矿中应用的可行性;同时,针对当前煤矿机械工作状态监测系统的不足,提出了基于微能源技术实现煤矿机械设备工作状态信息采集与发送系统自供电,结合Zigbee无线网络传输和通用分组无线服务技术(general packet ratio service,简称GPRS)通信方式实现煤矿机械设备工作状态监测系统自动化在线监测的发展方向。
