Unmanned aerial vehicle assisted vehicle-mounted road acquisition three-dimensional modeling system and realization method thereof

The invention discloses an unmanned aerial vehicle assisted vehicle-mounted road acquisition three-dimensional modeling system and a realization method thereof, aiming at solving the problems that an existing road acquisition three-dimensional modeling system is not accurate enough, the accuracy is not high and the like. The unmanned aerial vehicle assisted vehicle-mounted road acquisition three-dimensional modeling system comprises a vehicle carrying body; an unmanned aerial vehicle; a data acquisition system comprising a vehicle-mounted LIDAR, a vehicle-mounted SLAM and an airborne LIDAR; a data analysis system for acquiring precision optimized point clouds; a data splicing system for splicing a precision optimized vehicle-mounted LIDAR point cloud, an airborne LIDAR point cloud and SLAM data through a fusion boundary to form integrated positioning information; and a road three-dimensional modeling system for integrating road guardrails, a side slope, an overpass, a bridge lower part, a hillside outside a tunnel and an inner module of the tunnel to form a road three-dimensional model. The unmanned aerial vehicle assisted vehicle-mounted road acquisition three-dimensional modeling system takes the vehicle-mounted LIDAR as a main part and the unmanned aerial vehicle as an assisting part; and the vehicle-mounted LIDAR is combined with the unmanned aerial vehicle so that the comprehensive acquisition of target road data can be realized.