传感网协同环境下容错目标检测和定位策略  

Fault-Tolerant Target Detection and Localization Strategy Under Sensor Network Collaborative Environment

作　　者：冯钧[1] 吴晓蓓[2] 葛辉[1] 

机构地区：[1]南京理工大学泰州科技学院,江苏泰州225300 [2]南京理工大学自动化学院,南京210094

出　　处：《电光与控制》2015年第3期50-53,76,共5页Electronics Optics & Control

基　　金：国家自然科学基金(60672143);江苏省自然科学基金(BK2012803);教育部博士点基金(20113219110028)

摘　　要：针对无线传感网拓扑结构的动态特性和目标协同定位的准确性,通过对网络节点特性、网络模型和无线信道传输模型进行需求分析,给出若干相关定义和数学模型,并在此基础上提出了一种具有容错性的传感网协同环境下的目标检测和定位策略,由目标区域监测、目标监测定位和基站通信定位3个阶段组成。该方法的基本原理是所有传感节点通过判断接收目标信息的强度来确定观测值,在此基础上通过与其他节点进行通信,取观测平均值为本区域的观测值,从而筛选出合格和优秀传感节点与基站传感节点通信,最后由基站和通用两类传感节点协作完成对检测目标位置的准确定位,具有容错性能好、定位准确度高等特点。仿真结果从容错能力评价、定位准确度等方面验证了所提方法的正确性和有效性。Aiming at the dynamic characteristics of topological structure for wireless sensor network and the fault-tolerant requirement of target detection, by means of demand analysis to the network node characteristics, network model and the wireless channel model, some definitions and related mathematical model are given. On which basis, a fault tolerant target detection and localization strategy in the presence collaborative sensor network is proposed, which is composed of 3 phases as target region monitoring, target monitoring and positioning, and base station communication positioning. The principle of the method is that the target signal intensity received by sensor node is taken as the observation value, and the average of observation value sequence of the surrounding nodes as local observation through local information exchange. Thus the qualified and excellent sensor nodes and the base station node communication are selected. Finally, the target is localized precisely through two types of sensor node with good fault-tolerant performance and positioning accuracy. The simulation results verify the correctness and effectiveness of the proposed method from fault-tolerant ability evaluation and positioning accuracy.

关 键 词：目标检测 协同定位 容错性 传感网 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]