一种基于智能手机的实时高精度定位系统开发与车载应用测试

Development of a real-time high-precision positioning system based on smartphones and vehicle-mounted application test

手机GNSS芯片可支持多模GNSS观测信号,其提供的原始观测量为高精度导航定位提供了可能,智能手机高精度导航定位成为研究热点之一。本文首先基于自研的反向RTK算法,设计并开发了一套基于智能手机的实时高精度定位系统,降低手机的计算压力;然后基于智能手机小米8,进行了大范围(覆盖深圳、武汉、北京)、多场景(城市开阔/遮挡,高速开阔/遮挡)的动态车载应用测试,用于验证系统的可靠性和可用性。测试结果表明:系统在各场景下均能稳定有效运行,在开阔环境下,小米8可实现亚米级的实时动态定位精度,精度最优可达0.21 m。

With the development of smartphones with multi-system GNSS observations,the raw GNSS observations of the smartphones are feasible for high-precision positioning,which has become one of the research hotspots.In this paper,we develop a set of real-time high-precision positioning system for smartphones based on reverse RTK,which could reduce the computing pressure of smartphones.Based on Mi 8 smartphone,we perform a large-scale(Shenzhen,Wuhan and Beijing),multi-scenarios(urban open/blocking,highway open/blocking)dynamic vehicle-mounted application test to verify the reliability and usability of the system.The results show that the system can operate stably and effectively in all scenarios.Besides,we can achieve sub-meter real-time dynamic positioning accuracy under the open sky environment,with an optimal accuracy of 0.21 m.