基于激光遥感技术的硬靶相干测速试验  

Hard-Target Coherent Velocity Measurement Experiment Based on Laser Remote Sensing Technology

作　　者：陈玉宝[1,2] 李强 步志超[2] 李龙[4] 

机构地区：[1]南京信息工程大学气象灾害预报预警与评估协同创新中心中国气象局气溶胶-云-降水重点实验室,南京210044 [2]中国气象局气象探测中心,北京100081 [3]山东省东营市气象局,东营257091 [4]北京理工大学机械与车辆学院,北京100081

出　　处：《气象科技》2016年第5期697-701,共5页Meteorological Science and Technology

基　　金：2015年中国气象局气象探测工程技术研究中心开放课题"高光谱激光雷达探测气溶胶消光系数技术研究"资助

摘　　要：随着光纤激光技术的快速发展,全光纤相干多普勒激光雷达已逐步应用于大气风场探测业务中。为了更好地发挥相干多普勒激光雷达的效益,必须使激光雷达保障和使用人员更好地了解其基本原理及结构。基于多普勒效应和激光相干原理,以迈克耳逊干涉仪结构为原型,在实验室中搭建了基于532nm可见激光的空间多普勒测速系统,利用频谱处理技术,准确地测得了漫反射转轮的切向速度,直观地展示了激光相干多普勒测速系统的原理、结构及速度反演方法。此外,在532nm相干测速试验的基础上,搭建了基于1550nm激光的全光纤硬靶相干测速实验系统,开展了大量对比观测试验,在转轮速度分别为2.9m/s和4.8m/s时,试验系统与实测转轮速度之间的系统差分别为-0.01m/s和0.04m/s,标准差分别为0.08m/s和0.1m/s,说明了激光测速系统测量数据的可信性。With the rapid development of optical fiber technology,the all-fiber Doppler lidar has been used in the wind detecting.In order to maximize the benefits of the coherent Doppler lidar,the basic principles and structure of the Doppler lidar are described for the lidar data user and operators.The 532-nm visible laser Doppler measurement system was built in the lab based on the Michelson interferometer principle,and the accurate speed of the wheel is gained.The principles,structure,and velocity inversion of the laser coherent velocity measurement system are displayed directly.In addition,the all-fiber velocity measurement system based on 1550-nm laser was set up in the lab,through a great number of observation experiments.When the speed of the wheel is 2.9 m/s and 4.8 m/s,the system errors of the speed is-0.01m/s and 0.04m/s and the standard deviation is 0.08m/s and 0.1m/s,respectively.The results show that the speed measured by the all-filer 1550-nm laser velocity measurement system is credible.

关 键 词：多普勒 相干 迈克耳逊干涉仪 傅立叶变换 

分 类 号：TN241[电子电信—物理电子学]