摘要
通过对现行简易无验潮水下地形测量原理及作业过程的系统分析,找出了制约或严重影响测量成果质量的因素及关键环节,在此基础上,提出了有别于现行方法的多源多传感器集成下的精密无验潮水深测量新理念。基于GNSS、测深仪、姿态传感器、电子罗经等多源多传感器数据,通过RTK和Heave的信息融合,实现了动态情况下RTK高程质量的控制;基于一致性垂直运动,精确获得了动态时变时延序列;基于姿态、罗经和RTK数据的信息融合,实现了一体化船姿改正,获得了厘米级的水下测点三维坐标,将传统的水深测量精度提高了一个量级。野外进行的工程测量实例,进一步证明了该方法的正确性及可靠性。
With the systematic analysis on the principle and process of current simple underwater topographic survey without tidal observation,we find out the factors and critical steps that limit or significantly affect the products of survey.Based on these,a new idea of precision surveying method of water depth without tidal observation integrated by multi-sensors is proposed,which differs from current method.Based on the data from multi-source sensors such as GNSS,bathymeter,attitude transducer and electric compass,in combination with fused information from RTK and Heave,the altitude data by RTK can be dynamically controlled.Based on homogeneous vertical motions,the dynamic series of time-varying delays can be achieved accurately.Through the information fusion of data from attitude transducer,compass and RTK,the unified correction of vessel attitude is achieved,and the 3D coordinates of underwater measuring point is achieved at centimeter magnitude.The traditional water depth measurement accuracy is improved by one order of magnitude.The field practices of engineering measurement further prove the validity and liability of the method.
作者
王真祥
刘世振
WANG Zhenxiang;LIU Shizhen(Changjiang River Estuary Bureau of Hydrology and Water Resources Survey,Bureau of Hydrology of Changjiang Water Resources Commission,Shanghai 200136,China;Bureau of Hydrology,Changjiang Water Resources Commission,Wuhan 430012,China)
出处
《人民长江》
北大核心
2019年第12期60-65,共6页
Yangtze River
基金
国家自然科学基金资助项目(40776048)
江苏省测绘科研资助项目(JSCHKY200805)
关键词
水深测量
无验潮
传感器
船体坐标系
质量控制
水下地形测量
water depth measurement
without tidal observation
sensor
vessel coordinate system
quality control
underwater topographic survey
