光电工程, 2020, 47 (10): 200265, 网络出版: 2021-01-12
宏/子脉冲编码光子计数激光雷达
Macro/sub-pulse coded photon counting LiDAR
摘要
光子计数激光雷达因其极高的探测灵敏度在远距离目标探测领域有着非常重要的作用。针对远距离、高速度的目标,普通的光子计数激光雷达无法简单通过统计直方图获得有用的回波信息。为了解决这一问题,本文提出了一种基于宏/子脉冲编码的光子计数激光雷达,利用时移脉冲累加的方法提取子脉冲的飞行时间进而在一个宏脉冲内获得目标距离信息。建立了宏/子脉冲编码光子计数激光雷达的理论模型,对虚警概率和探测概率的影响进行了分析,并通过蒙特卡洛仿真和实验验证了其对远距离高速径向运动目标探测的有效性。
Abstract
Photon counting LiDAR plays an important role in the long-distance target measurement because of the high detection sensitivity. For the targets with high radial velocity and long distance, ordinary photon counting LiDAR could not recover the useful echo information simply by statistical histogram. In order to solve this problem, a method based on macro/sub-pulse coded photon counting LiDAR is proposed. The flight time of the subpulses is extracted by time shift pulse accumulation and the target distance information is obtained in one macro pulse. In this paper, the theoretical model of macro/sub-pulse coded photon counting LiDAR is established, and the influence of false alarm probability and detection probability is analyzed. The effectiveness of the LiDAR is verified by Monte Carlo simulation and actual experiments.
刘博, 姜朔, 于洋, 陈臻. 宏/子脉冲编码光子计数激光雷达[J]. 光电工程, 2020, 47(10): 200265. Liu Bo, Jiang Shuo, Yu Yang4, Chen Zhen. Macro/sub-pulse coded photon counting LiDAR[J]. Opto-Electronic Engineering, 2020, 47(10): 200265.