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针对我国首台自主知识产权车载LiDAR技术的高程精度问题,从系统的测量原理出发分析该系统高程精度的影响因素。其中,针对组合导航影响因素,通过试验对比组合导航加里程计对该系统精度的影响,并根据车载系统的特点给出组合导航安装里程计的方法;针对城市测绘环境问题,为车载系统用于道路测绘设计了特制控制点来提高精度的方案,并通过实例证明。提出的方法对车载LiDAR的市政道路高程精度进行了有效控制,可为该类系统在市政道路测绘等相关方面的应用提供参照。
In view of the problem of the elevation accuracy of the first in-vehicle LiDAR technology with independent intellectual property rights in our country, the influencing factors of the elevation accuracy of the system are analyzed based on the measurement principle of the system. In view of the influence factors of integrated navigation, the influence of combined navigation and odometer on the accuracy of the system is compared with the experimental results. Based on the characteristics of vehicle-mounted system, the method of integrated navigation and installation of odometer is given. For the urban mapping environment, Road mapping designed a special control point to improve the accuracy of the program, and proved by examples. The proposed method effectively controls the elevation accuracy of municipal road LiDAR, which can provide reference for the application of this kind of system in municipal road mapping and other related aspects.