基于单激光雷达的低空风场反演与精度分析  

Accuracy analysis for low attitude wind retrieval based on single lidar

作　　者：蒋立辉[1] 庄子波[1] 李勇[1] 

机构地区：[1]中国民航大学通信工程系智能信号与图像处理天津市重点实验室,天津300300

出　　处：《红外与激光工程》2006年第z3期252-256,共5页Infrared and Laser Engineering

摘　　要：利用激光雷达进行风场检测,可以通过多普勒频移来获取径向速度矢量,对于单一的激光雷达测速系统测得的数据要进一步反演才能得到三维的风场信息。文中介绍了一种基于双边缘的直接探测激光雷达系统,采用圆锥扫描方式,对于获取的径向速度信息选取扫描圆锥的垂直截面上互相正交的四个点,在均匀风的假定下,利用空间几何的特性求出中心点的三维速度信息,并依据雷达系统对于径向速度的测量精度,综合考虑了角度和距离分辨率以及由观测坐标系到地面坐标系的变换对精度的影响,计算结果表明:反演的三维风矢量精度最差可达到2.8 m/s。Utilizing lidar can detect atmosphere.Radial velocity can be obtained by Doppler shift.For single lidar system,this is the only way to retrieve three-dimension wind field from the measured data.The double-edge technique incoherent lidar which utilize conical scanning is introduced.On the hypothesis of uniform wind,four orthogonal points are sampled to obtain three-dimension wind field by spatial geometry's operation.And the wind field accuracy including the angle resolution,range resolution and the transform between the measuring coordinate and ground coordinate is estimated.The numerical calculation shown that relatively accuracy is below 2.8 m/s.

关 键 词：激光雷达 多普勒 风场反演 双边缘技术 

分 类 号：TN958.98[电子电信—信号与信息处理]