多通道光子计数符合激光测距系统设计与实现

Design and Realization of Photon-counting Laser Ranging with Multi-channel Coincidence

介绍一种针对高光背景下快速小目标探测的多通道光子符合计数激光测距方法,研制了一套基于7通道单光子探测器的1 064 nm激光测距实验装置。数值仿真得到,该系统测量145 km小目标的探测概率达到85%,并且有效抑制了白天背景噪声。在外场测试中,实现了日光背景下的远距离快速目标激光测距,最远测量了25 km的目标,距离测量精度为0.514 m。提出的多通道符合计数方法,有效地提高测量速率,同时改善系统的抗背景噪声能力,为实现远距离快速运动目标的跟踪提供了一种高灵敏的探测方案。

A multi-channel coincidence photon counting laser ranging method for long-distance and fast moving targets detection under strong sunlight background is introduced.A 1064 nm laser ranging experimental system with 7 channel single photon detector is developed.Numerical simulation shows that the detection probability is as high as 85%for detecting 145 km small target,and the daytime background noise is effectively suppressed.In the outfield testing,the laser ranging for far distance and high speed targets under daytime background is realized,and the farthest ranging distance is 25 km with the ranging precision of 0.514 m.The multi-channel coincidence photon counting method can effectively improve the measurement rate and the background noise suppression,providing a highly sensitive detection scheme for long-distance and fast moving target tracking.