激光雷达风速模拟系统设计  

Design of Wind Velocity Simulation System for Lidar

作　　者：常博 严志腾 Chang Bo;Yan Zhiteng(92942 Unit of the Chinese People’s Liberation Army,Beijing 100161,China)

机构地区：[1]中国人民解放军92942部队,北京100161

出　　处：《计算机测量与控制》2020年第6期236-242,共7页Computer Measurement &Control

摘　　要：多普勒测风激光雷达是大气风场探测的重要手段;在实际搭建测量大气的多普勒测风激光雷达前,为对系统进行定标,以光纤Mach-Zehnder干涉仪作为鉴频器,设计并建立了风速模拟探测激光雷达的自校正式实验系统,创新地采用可控转速机械转轮产生的线速度引起激光多普勒频移的方法模拟大气风场;利用种子激光器调节波长实现了系统输出强度变化,绘制光纤M-Z干涉仪透过率曲线,反推了光程差精确值;通过对模拟风场装置转轮侧面散射光经过光纤M-Z干涉仪后的能量进行探测,测得±20m/s范围内不同转速下的模拟风速值;通过实验结果分析验证了风速模拟探测激光雷达的自校正式系统的设计理论及方法的可行性。Doppler lidar is an important means of atmospheric wind field detection,In order to calibrate the system,based on fiber optic Mach Zehnder interferometer as frequency discriminator,design and build a formal experiment system of self-calibration for wind speed simulated detection lidar,an innovative method to simulate the atmospheric wind field is to use the laser Doppler frequency shift caused by the linear velocity by the linear velocity generated by the controllable rotating speed mechanical wheel.Utilize the seed laser wavelength can be adjusted to achieve the system output intensity variation,the transmission and signal intensity curve of fiber M-Z interferometer is drawn,obtain the exact value of optical path difference.Detected the energy of scattering light which through the optical fiber M-Z interferometer and derived from the simulation of wind field device wheel side.Within the scope of(20 m/s,values of the simulated wind velocity were measured under different rotational velocity.

关 键 词：多普勒测风激光雷达 光纤Mach-Zehnder干涉仪 风速模拟系统 

分 类 号：TJ206[兵器科学与技术—武器系统与运用工程]