基于ZigBee的室内定位系统研究

Research on the Indoor Positioning System based on ZigBee

本文基于ZigBee无线传感器网络技术,研究了一种通过记录接收信号强度指示RSSI(Received Signal Strength Indicator)的方法,利用三角质心算法进行定位的室内定位系统。该系统采用指数平滑法过滤采集到的RSSI数据,可以大量的节省存储器;采用简单的三角质心算法进行室内定位,可以较大的减少计算量,非常适合使用嵌入式系统做节点,实现室内定位系统成本低、功耗小、速度快、可靠性高的目标。此外,该系统采用数据拟合法,通过大量的实验拟合RSSI的衰减参数,达到了较高的定位精确度。

Based on ZigBee wireless sensor network technology, the purpose of this article is to study a system using triangle centroid location algorithm to undertake indoor positioning task by recording the Received Signal Strength In- dicator （RSSI）. The system uses the exponential smoothing method to filter the RSSI data, which can save a lot of memory. It also uses the triangle centroid location algorithm in order to reduce the amount of calculation. Given its low cost, low power consumption, high speed and reliability of the target, it is very convenient to implant the indoor positioning system in an embedded system In addition, the system uses the data fitting method. With a large number of experiments, our work is able to fit the attenuation parameters ofRSSI, and achieve a higher accuracy of positioning.