扫描式测风激光雷达的风场反演  

Wind field inversion technique for scanning wind lidar

作　　者：李丽[1] 王灿召[1] 谢亚峰[1] 董光焰[1] 

机构地区：[1]中国电子科技集团公司第二十七研究所,河南郑州450047

出　　处：《中国光学》2013年第2期251-258,共8页Chinese Optics

摘　　要：为了解决扫描式测风激光雷达斜上方空域三维风场分布探测的难题,提出采用多点规则采集、四波束分组结算、多区域融和的方式进行观测区域的风场反演。以速度可控的硬目标作为研究对象,通过比较合成后的风速大小与控制速度的差异验证了该反演方式的有效性。通过设计精度试验,对实际风场进行测量。对雷达测量结果与三维超声波风速风向仪测量数据进行对比,结果表明:采用该风场反演技术对距离400 m内的风场进行推算,风向精度优于5°,风速精度优于2 m/s,能够准确描绘探测区域的风场信息。In order to solve the difficulty of detecting three-dimension wind field oblique upper of a scanning wind lidar, a method of wind field inversion was provided based on multi-point regular acquiring, four-beam packet calculating and multi-area merging. To verify the validity of this method, a target with controllable ve- locity was studied and synthetic velocity was compared with the velocity in control. The result indicates that the method is feasible and effective. The accuracy test was designed to calculate the actual wind field within 400 m. Measurement data from lidar were compared with that from three-axis anemometer. The results indicate that the wind direction accuracy is better than 5~, and the wind speed accuracy is better than 2 m/s, which is enough to describe the wind field of detecting area accurately.

关 键 词：扫描式测风激光雷达 风场反演 风场分布 四波束 

分 类 号：TN958.98[电子电信—信号与信息处理]