基于无线传感网络的瓦斯监控报警系统

该文设计了以CC2430为核心的无线传感网络的瓦斯监控报警系统。该系统通过放置大量的无线传感器网络采集节点,实时进行节点处瓦斯浓度的采集和换算,并通过模糊PID控制实现节点附近的瓦斯浓度的智能化控制。     

一种适合于认知无线传感网络的路由算法

路由设计是认知无线传感网络（CRSNs）中目前受到较少关注却很重要的一个领域。在CRSN中,由于主用户（PUs）对可用信道资源的随机占用行为,路由算法的设计不仅需要考虑如何延长网络寿命,还要考虑网络内数据传输的可靠性。本文研究了具有频谱可感知特性,且对能量消耗敏感的 CRSN路由问题,揭示了 CRSN路由问题的独特性,并将这类问题表述为在能量约束和变化的网络拓扑环境下的网络寿命优化问题。在回顾传感器网络的典型算法之后,提出一种新的路由度量来克服 CRSN的路由设计挑战,即认知能量度量（CE）。在此基础上,提出一种分布式路由算法以延长网络寿命,同时提高数据传输的可靠性。仿真结果表明,所提路由算法能很好地适应 CRSN中可用信道资源及网络拓扑的随机变化。     

交通路灯监控系统的无线传感网链状路由算法

在交通路灯监控系统中为节省网络节点能耗和降低数据传输时延,提出一种无线传感网链状路由算法(CRASMS)。该算法根据节点和监控区域的信息将监控区域分成若干个簇区域,在每一个簇区域中依次循环选择某个节点为簇头节点,通过簇头节点和传感节点的通信建立簇内星型网络,最终簇头节点接收传感节点数据,采用数据融合算法降低数据冗余,通过簇头节点间的多跳路由将数据传输到Sink节点并将用户端的指令传输到被控节点。仿真结果表明,CRASMS算法保持了PEGASIS算法在节点能耗方面和LEACH算法在传输时延方面的优点,克服了PEGASIS算法在传输时延方面和LEACH算法在节点能耗方面的不足,将网络平均节点能耗和平均数据传输时延保持在较低水平。在一定的条件下,CRASMS算法比LEACH和PEGASIS算法更优。     

基于嵌入式的智能停车场远程监控系统

针对现阶段的停车场的管理存在管理复杂、工作效率低等问题,设计了一种基于嵌入式和ZigBee技术的智能停车场远程监控系统,以实现停车场的智能化控制。该系统通过ZigBee传感器网络采集停车场中停车位的信息,利用嵌入式系统和GSM模块进行数据的处理和传输,并通过上位机对整个停车场进行远程监控。介绍了系统的设计方案和工作原理,详细阐述了系统框架,硬件设计和软件设计。通过数据传输性能和整体性能的测试表明,该系统完全达到停车场监控系统的应用要求。     

交通路灯监控系统的无线传感网链状路由算法

在交通路灯监控系统中为节省网络节点能耗和降低数据传输时延,提出一种无线传感网链状路由算法（CRASMS）。该算法根据节点和监控区域的信息将监控区域分成若干个簇区域,在每一个簇区域中依次循环选择某个节点为簇头节点,通过簇头节点和传感节点的通信建立簇内星型网络,最终簇头节点接收传感节点数据,采用数据融合算法降低数据冗余,通过簇头节点间的多跳路由将数据传输到Sink节点并将用户端的指令传输到被控节点。仿真结果表明：CRASMS算法保持了PEGASIS算法在节点能耗方面和LEACH算法在传输时延方面的优点,克服了PEGASIS 算法在传输时延方面和LEACH算法在节点能耗方面的不足,将网络平均节点能耗和平均数据传输时延保持在较低水平。在一定的条件下,CRASMS算法比LEACH和PEGASIS算法更优。     

无线传感器网络中的路由能耗优化策略的研究

无线传感器网络由于受到实际通信环境的限制,传感节点在进行路由计算与数据转发时所需的电力能源主要由一次性电池供给。为了能够有效的节约节点上的路由能耗,提出了基于网络编码及动态功率控制优化策略,通过优化节点路由的数据转发次数和发射功率,减少了传感节点的路由能耗,延长了网络的生命周期。     

基于ZigBee的煤矿综合监控系统节点设计

针对目前有线煤矿安全监控系统存在网络布线麻烦、节点数量有限、安装不够灵活、组网不便等诸多弊端,设计了基于ZigBee的煤矿综合监控系统传感器节点,该节点能监测井下多种环境信息,可实现人员的大致定位,与监控软件配合,能够自动入网、自动组态。同时,根据煤矿实际情况,制定了一套专用通信协议,在保证数据传输可靠的前提下支持节点上述功能,实际运行证明,该节点工作稳定可靠。     

基于ZigBee技术的油田示功参数监控系统

介绍TZigBee技术与ARM相结合的无线传感网络的设计。利用SWOFT分析法得出的ZigBee的突出优势。在网络节点低能耗方面采用定时发送,中断唤醒的节能设计,延长了终端和路由的电池的使用寿命。使油田监控系统走向自动化、信息化、智能化。     

基于LEACH协议的WSNs楼宇环境监控系统的设计

针对楼宇环境监控的布线复杂与高功耗,设计了一种基于WSNs的大楼监控系统,使用了LEACH路由协议,构造了一个基于簇的网络。由于系统中的节点受到无线传输范围的限制,距离较远的簇首不能直接传递信息包给汇聚节点,所以簇首信息的交换被一个以汇聚节点为根的多跳生成树代替,汇聚节点将信息汇总然后发送至服务器内,这种簇的构造方法消耗节点能量少。子节点周期性地记录各种环境数据,实现数据传输。现场测试结果表明:此系统数据采集准确,操作方便,结构简单,实时性好。     

基于无线传感网络的野外古迹监控系统

为了更有效地保护野外文物古迹,设计了一种基于无线传感网络的野外古迹监控系统。系统以ZigBee网络为核心,传感节点单元(SNU)采用地震检波器HK20DX-10S监测古迹区域振动数据;中继节点单元(RNU)采用CC2530芯片负责数据收发并通过GPRS传输给远程监控中心;监控中心对数据分析处理,实现对监测区域内挖掘、爆破活动的实时监控和报警。测试结果表明,该系统具有成本低、响应快、可靠性高的特点,适用于野外遗址、博物馆等场所。     

高效的移动Sink路由问题的启发式算法

移动sink最短路由问题可以看作是带邻近区域的旅行商问题(TSPN)的一个特例,其邻近区域为随机部署的传感器节点的无线通信范围,可建模成大小各异并且存在重叠的圆盘。由于目前还不存在多项式时间算法来解决该种TSPN问题,提出了一种新颖的启发式算法。它利用TSP路径为不自交环路的特性构造一条赛道,通过内圈启发式、弯道启发式以及捷径搜索在O(n2)时间复杂度内找出赛道内的近似最短路径。形式化证明和大规模模拟实验都验证了该算法较同类算法能够更高效地找出较优的近似解。     

基于Chord的移动对等网络资源路由算法

针对移动P2P云环境下节点由于移动太快导致路由算法失效的问题,提出一种基于Chord资源路由算法。该算法修改基本路由结构,并设置实时机制和检查机制,实时机制在每次查找过程中实时修改路由信息,检查机制是检查路径节点是否为有效节点,并修改路径节点路由信息,提供给下次查询使用。实验结果表明,该算法有效提高查询成功率,同时减少查询延时。     

Optimized mobile sink based grid coverage-aware sensor deployment and link quality based routing in wireless sensor networks

Mobile sink (MS) has been used in wireless sensor networks (WSN) to increase the network lifetime by changing the location over time. The major quality of service given by WSN is coverage energy consumption (EC) and network lifetime. There are many methods implemented for enhance the coverage hole restoration and reduce the EC. We propose a novel MSCOLER (MS based Coverage Optimization and Link-stability Estimation Routing) protocol for Optimal Coverage restoration and Link stability Estimation. An optimization algorithm is used to optimize the coverage hole and move the redundant node besides the hole. During the routing process, link quality based routing is used to discover the relay nodes with the estimation of link stability to enhance the entire network lifetime and practically make the perfect transmission distance for energy saving. Experimental results demonstrate that proposed protocol can solve the coverage restoration problem, decrease the EC and reduce the network lifetime. The performance is evaluated regarding Average of residual energy (ARE), Receiving packets ratio (RPR), Moving energy consumption (MEC), Network lifetime (NL), Percentage of coverage (%C) and Average Energy Consumption (AEC).     

Energy efficient rendezvous points based routing technique using multiple mobile sink in heterogeneous wireless sensor networks

Wireless Networks - In recent decades, Sensor nodes (SNs) are used in numerous uses of heterogeneous wireless sensor networks (HWSNs) to obtain a variety of sensing data sources. Sink mobility...     

Autonomous mobile target tracking system based on grey-fuzzycontrol algorithm

This paper presents a new position-based tracking system for autonomous mobile target tracking task. A grey-fuzzy controller (GFC) is developed for motion control of the tracker, in which dynamics models of the target and tracker are not required a priori. The target detection is based on the adaptive visual detector (AVD), which can online adjust the histogram model based on the change of surrounding conditions, such as light variation, in a natural environment. The AVD and GFC are integrated together for mobile target-tracking applications. There are several advantages of the integrated system, in particular: (1) it can rapidly learn the target appearance model for the detection involved with the tracking task; (2) the temporal dynamics model of the target motion can be approximated for the predictive localization of the moving target; and (3) the system can deal with the uncertain environmental conditions to ensure the tracking performance by GFC. Three mobile robots in the authors' laboratory have been used to demonstrate the success of this integrated system experimentally. They also conduct target tracking experiments, in which Chung Cheng-I tracks various moving targets. The results demonstrate the robustness and flexibility of the overall system in dealing with mobile target-tracking problems under varied natural environment conditions     

Optimized priority based energy efficient routing algorithm for mobile ad hoc networks

Recently more and more research interest focuses on the energy efficient routing in mobile ad hoc networks and many related routing algorithms are reported. In this paper, a new optimized priority based energy efficient routing algorithm is presented and priority is added to the existing routing algorithm according to the residual energy proportion of the nodes. Lower residual energy means lower priority and the nodes with lower priority are less likely to forward packets to other nodes. The algorithm needs no global information of the networks and only a little modification is needed to the existing algorithm, so it is practical to be implemented. The algorithm can improve the performance of routing discovery, routing maintenance and cache management at the same time. Some optimization strategy is taken to reduce the network overhead and the lifetime of the network is much longer and the network with our algorithm can transfer much more effective data. Simulation with NS-2 is done and satisfying results are obtained with this algorithm. The results show that the algorithm is efficient.     

移动自组织网络基于链路稳定性的伪流言路由算法

分析了移动自组织网络中链路和路径的有效性的统计特性,并结合流言机制提出了一种基于链路稳定性的伪流言路由算法.该路由算法可以用更少的路由开销发现持续更长时间的稳定路由.仿真实验表明该算法与AODV结合显著地提高了网络的性能.     

GCRP: Grid-cycle routing protocol for wireless sensor network with mobile sink

Energy conservation is a critical issue in resource constraint wireless sensor networks. Employing mobile sink to deliver the sensed data becomes pervasive approach to conserve sensors’ limited energy. However, mobile sink makes data delivery a hard nut to crack since nodes need to know its latest location. Providing sink’s latest location by traditional flooding, erode the energy conservation goal. In this paper, we propose a Grid-Cycle Routing Protocol (GCRP) with the aim of minimizing the overhead of updating the mobile sink’s latest location. In GCRP, sensor field is partitioned into grid of cells and for each cell a grid cell head (GCH) is elected. Cycles of four GCHs is formed. Cycle(s) involving border GCHs is called exterior cycle and said to belong to a region. Another cycle involving non-boundary GCHs is called interior cycle, connecting GCHs of different regions. When sink stays at one location, it updates the nearest GCH, which in turn updates the other GCHs through exterior and interior cycle. Moreover, we propose a set of sharing rules that govern GCHs when and with who share sink’s latest location information. The performance of GCRP is evaluated at different number of nodes and compared with existing work using NS-2.31.     

基于TRICON控制系统防喘振控制算法

喘振是造成压缩机损坏的重要原因,在此针对某厂70万吨/年烯烃项目,根据丙烯工艺流程,设计了一套压缩机的防喘振控制系统。该控制系统以TRIEW软件为人机界面,利用TRICON独有的防喘振控制软件包,将喘振PID控制、喘振超驰、手动控制算法相结合,通过喘振PID参数的在线优化,有效地实现了压缩机的防喘振控制,现场实际运行结果表明了该系统的稳定性和可靠性,同时,验证了该喘振控制算法的有效性。     

时延受限的移动sink数据收集算法

在实时性要求比较高的应用中,时延要求限制了sink的移动速率与移动轨迹,sink的移动速率限制了节点与sink的通信时间,因此很难兼顾时延要求与数据收集效率。提出一种时延受限的移动sink数据收集算法MSDC,在低能耗缓存区内找到一条sink的最优移动轨迹,在有限的时间限制内利用sink的移动性来提升传感器网络的数据收集性能。仿真结果表明,与已有算法比较,该方案能够提高网络数据采集量,降低能耗,延长网络生命周期。