高动态范围激光雷达回波信号的全波形采集方法仿真研究  

Simulation research on full waveform acquisition method of high dynamic range lidar echo signal

作　　者：王睿 郭磐 张寅超 陈思颖 陈和 檀望舒 WANG Rui;GUO Pan;ZHANG Yinchao;CHEN Siying;CHEN He;TAN Wangshu(Key Laboratory of Photoelectric Imaging Technology and System,School of Optics and Photonics,Beijing Institute of Technology,Beijing 100081,China)

机构地区：[1]北京理工大学光电学院光电成像技术与系统教育部重点实验室,北京100081

出　　处：《光学技术》2024年第1期71-80,共10页Optical Technique

基　　金：国家自然科学基金青年基金(42005137)。

摘　　要：针对一些激光雷达系统中回波信号动态范围较大,难以对其进行强弱兼顾的高性能采集的问题,提出了利用高速数字化仪进行全波形采集,再配合算法软件处理的一种软硬件联合采集方法。对于其中的软件光子计数算法,还提出了一种脉冲甄别电压阈值的动态选择方法来提高计数准确度。为了对比验证方法的可行性,建立了光电探测采集的全链路器件仿真模型。基于一套优选器件的典型参数,仿真对比了全波形采集方法与现有方法的采集误差,验证了所提出的全波形采集方法及动态阈值选择算法的有效性与技术优势。该研究为高动态范围、微弱光信号的探测方法,提供了软硬件结合的新思路。For the high dynamic range of echo signals in some lidar systems, it can be challenging to achieve high performance acquisition of the strong and weak signals simultaneously. A hardware and software joint acquisition method is proposed, which uses a high-speed digitizer to acquire the full waveform and then deals with the algorithm software. For the software photon counting algorithm, a dynamic voltage threshold selection method is also proposed to improve the counting accuracy. The simulation model of devices in the full-link of photoelectric detection and acquisition is established to compare and verify the feasibility of the methods. Based on a set of typical parameters of preferred devices, the simulation compared the acquisition errors of the full waveform acquisition method with the existing methods, verifying the effectiveness and technical advantages of the full waveform acquisition method and the dynamic threshold selection algorithm. This research provides a novel idea for the detection of weak optical signals with high dynamic range by leveraging a synergistic combination of hardware and software techniques.

关 键 词：遥感与传感器 激光雷达 高速采集 高动态范围 光子计数 

分 类 号：TN249[电子电信—物理电子学]