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利用多普勒测风激光雷达(DWL)进行实地风场探测,对探测数据进行深入分析。介绍了基于三通道法布里-珀罗(FP)标准具的多普勒频率检测等基本原理,给出了DWL结构组成和系统参数;并分别给出了该DWL与风廓线雷达(WPR)低空对比探测数据、与气球探空仪高空对比探测数据,结果表明,低空数据的风速偏差在0.1~1.2 m/s,风向偏差在1°~9°之间,高空数据的风速偏差在0.1~2 m/s之间,风向偏差在1°~12°之间,表现出良好的一致性;对DWL数据精度进行分析,得出光束入射角、发散角、信噪比和探测器是影响精度主要因素的结论,从标准具透射率扫描拟合曲线入手,计算得出该型DWL实际探测偏差值高出理论值2.07%。
The use of Doppler wind lidar (DWL) for field wind detection, the probe data in-depth analysis. The basic principle of Doppler frequency detection based on the three-channel Fabry-Perot (FP) etalon is introduced, and the structure and system parameters of the DWL are given. Finally, the relationship between DWL and wind profiler radar (WPR ). The results show that the wind speed deviation of low-altitude data is between 0.1 and 1.2 m / s, the wind direction deviation is between 1 ° and 9 °, and the wind speed deviation of the upper-air data is 0.1 ~ 2 m / s, the wind direction deviation between 1 ° ~ 12 °, showing good consistency; DWL data accuracy analysis, the beam angle of incidence, divergence angle, signal to noise ratio and the detector is affected Accuracy of the main conclusions of the conclusion, starting from the standard transmittance scanning curve fit, calculated DWL actual detection deviation of the type value higher than the theoretical value of 2.07%.