直接探测激光雷达系统的建模与仿真
Modeling and simulation of lidar for direct detection
1 哈尔滨工业大学,应用物理系,黑龙江,哈尔滨,150001
2 天津津航技术物理研究所,天津,300192
摘要
从直接探测激光雷达系统的建模、激光雷达仿真系统的研究、计算机仿真实验等方面介绍了进行激光雷达系统仿真设计的理论和实践.从虚警概率、探测概率、信噪比和阈值噪声比决定最大探测距离的这一角度阐述建立直接探测激光雷达模型;假设在直接检测方式下,探测器噪声可以用高斯概率密度函数表示;考虑了大气分子和气溶胶的吸收和散射作用;仿真系统参数输入中尽可能考虑了实际系统的各种参数要求.仿真实验表明仿真软件能够客观地反映直接探测激光雷达在不同条件下应该探测的结果.
Abstract
Based on available data and theoretical models, the computer simulation of laser radar for direct detection is demonstrated. The basis of the theory model of laser radar for direct detection is built on that the maximal detectable distance is decided by certain detection probability, false-alarm rate, signal noise ratio and threshold noise ratio. In this simulation, it is supposed that the detector noise be denoted by Gaussian probability intensity function, the absorption and scattering of atmosphere and aerosol be interpreted by the U S Standard Atmosphere Model. The simulation results show that this simulation software of direct-detection lidar can give reasonable data under various practical conditions.
参考文献
[1] 米切尔R L.雷达系统模拟[M].北京:科学出版社,1982.15-60;224-314.
[2] 王广君,田金文,柳健.激光雷达前视成像仿真及障碍物识别方法研究[J].红外与激光工程,2001,30(6):462-465.
[3] . Simulation of error in optics radar range measurements[J]. Appl Opt, 1997, 36(27): 6869-6874.
[4] Over Steinvall,Tomas Carlsson. Three-dimensional Laser Radar Modeling[A]. SPIE[C] 2001, 4377.23-34.
[5] 熊辉丰.激光雷达[M].北京:宇航出版社,1994.45-54.
[6] 吴振森,韩香娥,张向东,等.不同表面激光双向反射分布函数的实验研究[J].光学学报,1996,16(3):262-266.
[7] . Threshold detection in the presence of atmospheric turbulence[J]. Appl Opt, 1995, 34(6): 1097-1102.
[8] 孙景群.激光大气探测[M].北京:科学出版社,1986.69-81.
张宇, 唐勐, 陈锺贤, 吴杰, 孙秀冬, 苏建忠, 刘锋, 崔玉平. 直接探测激光雷达系统的建模与仿真[J]. 红外与激光工程, 2004, 33(6): 572. 张宇, 唐勐, 陈锺贤, 吴杰, 孙秀冬, 苏建忠, 刘锋, 崔玉平. Modeling and simulation of lidar for direct detection[J]. Infrared and Laser Engineering, 2004, 33(6): 572.
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