基于北斗的智能手机内河航道高精度定位软件研发

Research and Development of BeiDou-Based High-Precision Positioning Software for Smartphones on Inland Waterways

针对目前日渐繁忙的内河航运场景下存在航线狭窄、船只近距离航行频繁、迫切需要高精度实时定位服务的问题,研究了基于智能手机的北斗卫星导航系统(BDS)差分定位关键算法,开发了一款智能手机内河航道实时高精度定位软件。通过利用船舶航行中高程缓变的特点,基于前溯若干个历元高程数据构建虚拟观测值,形成附加高程约束的滤波算法,有效提升了手机定位精度。对该软件在内河航行船舶上进行了性能测试,结果表明:以普通货船为载体时,实时平面动态定位精度为1.28 m;以高速公务艇为载体时,实时平面动态定位精度为1.60 m,完全能满足船舶实时高精度导航需求。

Aiming at the current increasingly busy inland waterway navigation scenarios,where there are problems of narrow routes,frequent close navigation of vessels,and an urgent need for high-precision real-time positioning services,this study focuses on the key algorithms of BeiDou Navigation Satellite System(BDS)differential positioning based on smartphones and develops a real-time high-precision positioning software for inland waterway navigation on smartphones.By leveraging the characteristic of slow elevation changes during ship navigation,virtual observation values are constructed based on elevation data from several previous epochs,and a filtering algorithm with additional elevation constraints is formed,effectively improving the positioning accuracy of smartphones.Performance tests of this software on inland waterway vessels show that the real-time planar dynamic positioning accuracy is 1.28 meters when ordinary cargo ships are used as carriers,and 1.60 meters when high-speed official boats are used as carriers,fully meeting the demand for real-time high-precision navigation of ships.