基于ZigBee无线传感网络的人员定位系统设计与实现

Design and implementation of personnel positioning system based on ZigBee wireless sensor network

针对现有无线传感器网络定位系统精度不高的问题,采用基于校正模型的三边测距质心定位算法实现人员定位。通过研究ZigBee无线通信技术,分析无线电传播路径损耗模型,结合实验测试得到RSSI测距模型。引入高斯滤波模型和自校正模型修正测距值,在三边测量法的基础上结合质心定位思想,以三圆相交部分的质心作为盲节点的估算位置。经试验测试,该系统的定位误差小于10%,有效地降低了环境引起的盲节点位置误差,提高了定位精度。

Aiming at the problem of low accuracy of the existing wireless sensor network positioning system,in the paper,the three side location algorithm based on the calibration model is used to realize the positioning of the personnel. Through the research of Zig Bee wireless communication technology,analysis of radio propagation path loss model,combining RSSI（ Received Signal Strength Indication） ranging model by experiment test,and introducing the Gaussian filter model and the self correction model to correct the range values. On the basis of the three side measurement method which combined with the idea of centroid localization,using the estimation position of the centroid of the three circle intersection as the blind node. By testing,the positioning error of the system is less than 10%,which reduces the blind node position error caused by the environment effectively and improves the positioning accuracy.