车载移动激光扫描测绘系统设计

Design of Land-based Mobile Laser Scanning Mapping System

为了高效快速地获取城市三维空间信息,设计完成了一套基于多传感器集成技术的车载移动激光扫描测绘系统。该系统采用激光陀螺捷联惯性测量组合、差分全球定位系统(DGPS)和里程计构成高精度定位定向系统,提供测量的位置姿态基准;以激光扫描仪为主,CCD相机、高速视频摄像机为辅助构成数字图像系统,采集数字图像信息;两个系统在车载计算机系统的控制下完成测量数据的同步采集存储;采用后处理方式,将各种数据进行匹配整合,完成城市三维真实场景的建模。

In order to obtain urban three-dimensional spatial information quickly and efficiently, the land-based mobile laser scanning mapping system based multi-sensor integration technology is designed. In this system, ring laser gyro（RLG） strapdown inertial measurement unit（SIMU） ,DGPS and odometer constitute the high-accuracy position and orientation system（POS） to provide positional and orientation information of the mapping. Major with laser scanner, supplementary with CCD camera and SVHS camera, the digital imaging system is constituted to acquire digital imaging information. Under control of the land-based computer system, both of these systems accomplish mapping data synchronous acquisition and storage. By means of post-procession,all kinds of data is matched and coordinated. Thus urban three-dimensional actual scene modeling can be constructed.