摘要激光雷达已从 20 世纪的探索阶段，发展到了日臻成熟的阶段。相对微波、毫米波雷达，工作频段的迁移使其具有很多独特性的优点，但随之而来的也有一些缺点，例如受雨滴的影响较大，雨滴造成的衰减较为严重。因此雨滴对于光的衰减特性就变得极为重要。本文利用蒙特卡罗方法，将激光光束微观化为光子，建立了光子传输模型。模拟中通过光子与雨滴的相互作用来表现激光在雨中的传播过程，并编写了 Matlab 仿真程序。根据仿真结果得出，雨滴对激光光束的吸收在降雨强度不是很大的情况下可以忽略，而雨滴的散射使激光光束在传播方向的衰减严重不可忽略。雨滴的衰减会使激光雷达的错测率和漏测率增加，测距密集度减小。对激光雷达系统的优化设计具有理论指导意义。60997
毕业论文关键词 激光雷达 雨滴 蒙特卡罗模拟 Matlab仿真
Title The Ranging Property of Laser Radar in The Rain
Abstract The lidar has reached a maturity stage from the exploration stage in twentieth century. As opposed to the microwave radar, millimeter wave radar, the migrate of the work band make lidar process a lot of advantages, however, some shortcomings are followed, such as severe raindrop attenuation. So it is becoming more important that study on the raindrop attenuation. In this paper, we regarded the laser beam as photon beam and established a
