摘要:研究目的:轻型Lklar是近两年研发的体积小、重量轻的测绘装备，适合于搭载在三角翼或无人机等低 空飞行、起飞条件简易、航空管制少的航空器上。三角翼搭载轻型Lklar设备的数据获取、数据处理、点云配 准与滤波以及应用等方面研究课题较多，技术水平也在不断发展完善。本文基于我国南方山区、植被茂密某 铁路航飞项目，对上述四个研究方面进行分析探讨，以期对该技术的推广应用积累经验。 研究结论:（1)三角翼搭载轻8 Udar设备是常规机载Udar航飞数据获取的重要补充手段，空域协调申 请便捷，飞行条件简易，综合飞行效率高；2)轻型Lklar设备扫描角度大，可以实现对植被的上部和旁侧穿 透，有效点云密度大，点云数据绝对精度较高，可以基本满足铁路勘测大比例尺地形图、纵横断面测绘等的需 求；3)随着硬件性能的提高、数据处理算法的改进和完善，该技术在线状工程勘测中具有较大的推广应用 前景。

Abstract: Research purposes: Light - Lidar, a light small airborne radar, specially designed for delta wing and unmanned aerial vehicles which can fly low, take off easily and are less restricted by air traffic control, is a new scientific research achievement in recent two years. The technical levels of light - Lidar mounted on delta wing in data acquisition,data post - processing, point cloud alignment and filtering develop continually and are widely used and researched in many topics. Herein, further discussions and analysis are reported in this paper so as to accumulate experience in the new technology ’ s extension and application based on a dense vegetation railway aerial project in southern China, a mountain area. Research conclusions:(1) Light - Lidar mounted on delta wing provides an important supplement to the traditionally airborne radar and has advantages as follows： less air traffic control, easy takeoff, high efficiency. (2) Light - Lidar has a wide scan angle range. Lasers from it can penetrate trees in any angle. Light - Lidar receives denser available point clouds which have higher relative accuracy and can meet the need of large scale topographic map and vertical and horizontal section in railway survey. (3 ) With the improvement of the hardware and data processing algorithm，this technology has great application prospects.