无人船测量系统在山地城市水下测量中的应用

Application of Unmanned Ship Survey System in Underwater Topographic Survey of Mountain City

GNSS与测深仪相结合目前是较大面积水域水下地形测量的主要方法,然而对于重庆等山地城市的河流来说,存在水域周边地形陡峭、水下地形起伏大、水面障碍物较多等问题,导致水下地形测量实施困难、成果质量不能保证。北斗卫星的不断增多显著增加了可见定位卫星数量,小型智能无人船大大减少了测量盲区。工程实践证明,北斗地基增强系统与小型智能无人船相结合,能较好地解决山地城市复杂水域的水下测量难题。

The combination of GNSS and bathymeter is the main method for underwater topographic survey of large area of water,but for rivers in mountainous cities like Chongqing,there are many problems such as steep terrain around the water area,large undulation of underwater terrain,and many obstacles on the water surface,which make the implementation of underwater topographic survey difficult and the quality of survey results cannot be guaranteed.The continuous increase of Beidou satellite significantly increases the number of visible positioning satellites,and the small intelligent unmanned vessel greatly reduces the measurement blind area.The practice shows that the combination of Beidou foundation strengthening system and unmanned vessel can solve the problem of underwater survey in the complex water area of mountainous city.