基于改进双向双边测距的超宽带定位技术及应用研究

Research on UWB location technology and application based on improved symmetric double sided two-way ranging

针对飞行时间(time of flight,TOF)定位速度慢的问题,提出一种改进双向双边测距方法,结合距离差测量,只需一次测距就可以实现移动节点到多个固定参考节点的测距,进而提高TOF定位速度。设计超宽带(ultrawideband,UWB)定位实验系统,完成改进双向双边测距实验验证与定位精度测试,经测试定位精度达到分米级。改进的双向双边测距方法可提高传统TOF定位的定位速度,同时将该方法应用于过山车测速并结合卡尔曼滤波进行数据处理,为精确测量提供一个新角度。结果表明,采用四基站时定位时间约为原定位时间的1/4,能够较好地测量高速运动物体的速度,具有很好的应用前景。

Aiming at the problem of slow positioning speed of TOF(time of flight),an improved symmetric double sided two-way(SDS-TWR)ranging method is proposed.The measurement of distance difference can be used to measure the distance from a mobile node to multiple fixed reference nodes with only one ranging,thereby improving the TOF positioning speed.UWB(ultra-wideband)positioning experiment system was designed,and the experimental verification and positioning accuracy test of improved symmetric double sided two-way ranging,which reached the level of decimeter,were completed.The improved symmetric double sided two-way ranging method improves the positioning speed of the traditional TOF positioning,and the method is applied to the measurement of roller coasters’speed and combined with Kalman filtering for data processing,which provides a new perspective for accurate measurement.The results show that the positioning time of the four base stations is about 1/4 of the original positioning time,which can better measure the speed of high-speed moving objects,and has a good application prospect.