激光雷达视场角的研究  

Study on lidar receiver field of view

作　　者：卢益民[1] 杜竹峰[1] 黄铁侠 杨宗凯[1] 

机构地区：[1]华中理工大学电信系

出　　处：《激光技术》1999年第1期46-50,共5页Laser Technology

基　　金：国家自然科学基金

摘　　要：在激光雷达的研究中，接收机视场角是一个非常重要的参数。作者利用一种改进的半解析ＭｏｎｔｅＣａｒｌｏ方法对激光雷达接收信号进行了模拟。在作者的模拟中，采用ＨｅｎｙｅｙＧｒｅｎｓｔｅｉｎ函数的修正公式、加入权值以及放宽判决门限等方法来增进光子的利用效率。由计算结果可以看出，不同的接收机视场角使得接收信号波形有很大的差异。通过分析，我们认为接收机视场角ＦＯＶ＝２０～３０ｍｒａｄ时能够获得较佳的接收信号。The receiver field of view is a characteristic parameter of lidar and defined by its angular coverage.When laser beam propagates in liquid medium,received signal has the relation with the receiver field of view and beam scattering.We employ a improved semi analytic Monte Carlo method to simulate the lidar receiver signal.In order to obtain higher simulation accuracy,we use the modified Henyey Greenstein function to express the scattering phase function,insert weight collision coefficient of photon,and relax the critical limit in order to increase the calculation efficiency of photon.As known from the simulation results,different receiver field of view produce greatly different received signal waveform. Finally ,we concluded that the optimum receiver signal can be obtain when receiver field of view is in the range of 20～30mrad.

关 键 词：激光雷达 接收机视场角 多次散射 接收信号波形 

分 类 号：TN958.98[电子电信—信号与信息处理] TN957.52[电子电信—信息与通信工程]