用无线传感器网络探测跟踪目标

与传统的探测跟踪方法相比,无线传感器网络以其良好的特性弥补了传统跟踪方法的不足。文章介绍了无线传感器网络的体系结构,探讨了无线传感器网络探测跟踪目标的策略和方法,最后提出了用无线传感器网络跟踪目标需要考虑的问题。     

传感器网络在战场目标定位跟踪中的应用

信息化战争要求作战系统"看得明、反应快、打得准",打得准的关键是对目标进行定位跟踪。文章介绍了无线传感器网络的基本概念和体系构成,探讨了无线传感器网络技术在战场目标定位跟踪方面应用的原理,讨论了无线传感器网络应用于战场目标跟踪定位的关键技术。     

无线传感器网络安全现状应对策略研究

无线传感器网络是目前最前沿的研究之一。随着科技的进步,无线传感器网络在我们的日常生活中发挥着越来越重要的作用。而无线传感器网络的独特性使得它很容易受到各种攻击,这也对无线传感器网络安全性提出了更高的要求。文章试着分析无线传感器网络存在的安全隐患,并提出无线传感器网络的防护策略。     

无线传感网络中的目标跟踪技术

无线传感器网络由于其自组织性、鲁棒性及节点数量巨大的特点,非常适合于目标跟踪。无线传感器网络目标跟踪大体分为单目标跟踪与面目标跟踪。单目标跟踪主要采用双元检测协作跟踪、信息驱动协作跟踪、传送树跟踪算法等方法。面目标跟踪采用对偶空间转换算法等方法。在无线传感器网络目标跟踪中,跟踪精度、跟踪能量消耗和跟踪可靠性是需要考虑的主要问题。     

面向目标跟踪的无线传感器网络设计

无线传感器网络包含许多具有感知、计算和无线通信能力的微型传感器节点,现已广泛应用于国防、工业和农业等领域。文章将无线传感器网络应用于目标跟踪中,该网络主要包括声学传感器节点、图像节点和指挥中心节点,声学传感器节点和图像节点将采集的信息传递给指挥中心,指挥中心融合处理后对目标进行定位和跟踪。实验仿真表明设计的无线传感器网络具有较高的跟踪精度。     

无线传感器网络中移动目标跟踪算法研究

由于单个传感器节点的通信、处理和感知能力有限,所以传感器节点必须协同工作才能够完成任务。本文介绍了无线传感器网络的研究现状,阐述了目前成形的无线传感器网络协议与体系结构,阐述了针对面向目标跟踪的无线传感器网络涉及到的一些关键技术,并对现有的一些无线传感器网络中移动目标协同跟踪算法以及未来的发展方向进行了论述。     

基于预测分离的无线传感器网络多目标跟踪算法

目标跟踪一直是无线传感器网络的重要方向之一。由于无线传感器网络在目标跟踪应用中有很多限制,相对传统的多目标跟踪手段,无线传感器网络多目标跟踪的研究成果很少。本文针对无线传感器网络目标跟踪中的限制因素,提出了一种基于预测分离的无线传感器网络多目标跟踪算法。算法利用混叠信号分离的原理对多目标混叠信号进行分离,得出每个目标所产生的单一信号,计算每个目标的状态,根据目标前一时刻的状态,用直线预测的方法预测目标下一时刻的状态。最后通过仿真验证算法。     

基于拓扑控制的无线传感器网络节点负载均衡策略

无线传感器网络已成为当今的一个研究热点,由于无线传感器网络是一个能量受限网络,需要采取措施延长网络的正常使用寿命,负载均衡策略正是延长网络生命期的重要手段.本文介绍无线传感器网络中的节点负载问题,提出了一种基于拓扑控制的无线传感器网络节点负载均衡策略,有助于延长无线传感器网络的使用寿命.     

基于声强的无线传感器网络目标跟踪方法研究

为有效解决无线传感器网络对具有声音特性移动目标的跟踪问题,该文利用声音随距离的能量衰减模,并结合声强特性,给出了基于动态组管理机制的目标跟踪方法。仿真实验结果表明无线传感器网络中基于声强特性的方法,能够有效实现对移动目标跟踪,结合Kalman滤波算法提高了实验结果的跟踪精度。     

无线传感器网络中基于移动代理的信息驱动的多分辨率算法研究

该文提出了一种适用于无线传感器网络的基于移动代理的信息驱动的多分辨率(MAIDM)算法,以提高目标跟踪过程中数据处理的精度和容错性,并满足无线传感器网络对节能方面的要求。该文在以簇为逻辑结构的无线传感器网络中,移动代理根据各节点信息贡献量的估计,使用多分辨率算法收集、处理节点数据,并根据移动代理迁移路径上节点信息贡献量的最大值,动态决定其携带的数据量,以达到在节省能量的同时,提高跟踪的精度和容错性。仿真验证了MAIDM算法在精度和容错性方面比IDSQ算法有很大的提高,在节省能量方面比MA-CSIP算法更加有效。     

Energy-efficient collaborative target tracking algorithm using cost-reference particle filtering in wireless acoustic sensor networks

Target tracking is one of the most important applications of wireless sensor networks. Optimized computation and energy dissipation are critical requirements to save the limited resource of sensor nodes. A new robust and energy-efficient collaborative target tracking framework is proposed in this article. After a target is detected, only one active cluster is responsible for the tracking task at each time step. The tracking algorithm is distributed by passing the sensing and computation operations from one cluster to another. An event-driven cluster reforming scheme is also proposed for balancing energy consumption among nodes. Observations from three cluster members are chosen and a new class of particle filter termed cost-reference particle filter (CRPF) is introduced to estimate the target motion at the cluster head. This CRPF method is quite robust for wireless sensor network tracking applications because it drops the strong assumptions of knowing the probability distributions of the system process and observation noises. In simulation experiments, the performance of the proposed collaborative target tracking algorithm is evaluated by the metrics of tracking precision and network energy consumption.     

基于强跟踪滤波的传感器目标跟踪算法

为了提高运动目标的跟踪精度,提出一种基于强跟踪滤波的传感器目标跟踪算法.首先通过传感器节点测量目标的状态值,并通过融合中心对信息进行融合,然后利用Cholesky分解技术变换成噪声独立的量化融合系统,并采用强跟踪滤波算法对目标状态进行估计,最后与其它目标跟踪算法进行对比实验.结果表明,本文算法不仅提高了目标跟踪的精度,而且具有更好的鲁棒性.     

无线传感网络安全防护路径激光追踪方法

为了提高无线传感网络安全防护能力,需要进行网络安全防护路径设计,提出基于联合节点行为覆盖的无线传感网络安全防护路径激光追踪方法.构建无线传感网络安全防护路径的覆盖关系模型,根据传感器节点与目标节点从属关系进行无线传感网络安全防护的路径空间规划设计,采用最短路径寻优方法进行无线传感网络安全防护路径的激光控制,采用激光扫描...     

Efficient Energy Utilization Through Optimum Number of Sensor Node Distribution in Engineered Corona-Based (ONSD-EC) Wireless Sensor Network

An optimum sensor node deployment in wireless sensor network can sense the event precisely in many real time scenarios for example forests, habitat, battlefields, and precision agriculture. Due to these applications, it is necessary to distribute the sensor node in an efficient way to monitor the event precisely and to utilize maximum energy during network lifetime. In this paper, we consider the energy hole formation due to the unbalanced energy consumption in many-to-one wireless sensor network. We propose a novel method using the optimum number of sensor node Distribution in Engineered Corona-based wireless sensor network, in which the interested area is divided into a number of coronas. A mathematical models is proposed to find out the energy consumption rate and to distribute the optimum number of sensor node in each corona according to energy consumption rate. An algorithm is proposed to distribute the optimum number of sensor nodes in corona-based networks. Simulation result shows that the proposed technique utilized 95 % of the total energy of the network during network lifetime. The proposed technique also maximizes the network lifetime, data delivery and reduce the residual energy ratio during network lifetime.     

Energy-efficient information routing in sensor networks for robotic target tracking

Target tracking problems have been studied for both robots and sensor networks. However, existing robotic target tracking algorithms require the tracker to have access to information-rich sensors, and may have difficulty recovering when the target is out of the tracker??s sensing range. In this paper, we present a target tracking algorithm that combines an extremely simple mobile robot with a networked collection of wireless sensor nodes, each of which is equipped with an unreliable, limited-range, boolean sensor for detecting the target. The tracker maintains close proximity to the target using only information sensed by the network, and can effectively recover from temporarily losing track of the target. We present two algorithms that manage message delivery on this network. The first, which is appropriate for memoryless sensor nodes, is based on dynamic adjustments to the time-to-live (TTL) of transmitted messages. The second, for more capable sensor nodes, makes message delivery decisions on-the-fly based on geometric considerations driven by the messages?? content. We present an implementation along with simulation results. The results show that our system achieves both good tracking precision and low energy consumption.     

On Prolonging the Lifetime for Wireless Video Sensor Networks

This paper investigates strategies for prolonging the system lifetime for wireless video sensor networks, by adopting a mobile sink and solar-powered video sensors. Issues of tracking moving objects in wireless video sensor networks are studied, and the effectiveness of adopting a mobile sink is evaluated. This paper applies a power-rate-distortion analysis framework, which provides a theoretical fundamental to quantify various properties of wireless video sensor networks. The performance of wireless video sensor networks is evaluated with a mobile sink versus a static sink, under different cluster sizes and number of sensors. Comparisons of network lifetime, tracking error, video distortion, are also covered in this paper. In addition, this paper also evaluates the performance of solar-powered video sensors under an unequal layered clustering topology.     

Optimal tracking interval for predictive tracking in wireless sensor network

An important application of wireless sensor networks is tracking moving objects. Prediction-based techniques have been proposed to reduce the power consumption in wireless sensor networks by limiting the sensor active time. This paper proposes a quantitative method to optimize the power efficiency by analyzing the effect of prediction on the energy consumption in such networks. To our best knowledge, our efforts are the first attempt made to calculate the optimal tracking interval for a given predictive tracking algorithm. Based on this method, the lifetime and power efficiency of a sensor network can be effectively improved.     

基于无线传感网络的手机实时医疗监护系统简

针对通过住院观察病人的心电图来对心血管疾病进行诊断的方法的不足,文中采用无线传感网络作为监控系统的信息采集平台,将其应用于人体健康监控领域,设计并实现了一款基于无线传感网络的手机实时医疗监护系统。系统通过无线传感网络来对患者的心电数据进行集中式管理．并可通过医生工作站来实现对患者的远程病情诊断。与目前现有的远程医疗监护系统相比,基于无线佳感网络的手机实时医疗监护系统具有精确度高、实时性好、能耗低、部署方便、设备廉价等一系列优势。     

基于神经网络的自组织传感器网络设计

多传感器目标跟踪是信息融合的一个重要研究内容。尽管已经有许多的融合算法,但目前对跟踪传感器的配置问题研究还很少,而这对于设计一个成功的UGS网络系统是必要的。本文设计了一种神经元阈值可调的自适应Hopfield网络,可以自组织地从整个网络中选取合适数目的传感器组成跟踪器,使整个系统的精度足够高,而使用的传感器数目尽可能少。仿真显示了算法的有效性。