高精度相位式激光雷达测距系统的设计  

Design of high precision phase laser radar ranging system

作　　者：李岸然 邵光存 靳凤宇 张传辉 李伟 牟媛慧 蔡恩林 Li Anran;Shao Guangcun;Jin Fengyu;Zhang Chuanhui;Li Wei;Mou Yuanhui;Cai Enlin(Qilu University of Technology(Shandong Academy of Sciences),Shandong Academy of Sciences Laser Research Institute,Jining,Shandong 272000,China;Jining Keli Optoelectronics Industry Co.,Ltd.,Jining,Shandong 272000,China;Tianjin Tianforging Press Co.,Ltd.,Tianjin 30000,China;School of Electronic Information,Qingdao University,Qingdao,Shandong 266071,China)

机构地区：[1]齐鲁工业大学(山东省科学院),山东省科学院激光研究所,山东济宁272000 [2]济宁科力光电产业有限责任公司,山东济宁272000 [3]天津市天锻压力机有限公司,天津30000 [4]青岛大学电子信息学院,山东青岛266071

出　　处：《光电工程》2024年第3期95-104,共10页Opto-Electronic Engineering

摘　　要：现代科技中,激光雷达在自动导航、工业测绘等领域扮演关键角色,但传统相位测距系统普遍存在测量精度低和结构复杂等问题。本文提出了一种新型的高精度相位式激光雷达测距系统。该系统采用激光控制同频参比的相位差检测方法,包括对激光发射和接收模块的光学结构优化,以及对接收电路的放大滤波与差分混频处理,最终制作出了一个基于AD8302的高分辨率鉴相系统。实验结果显示,该系统测量精度为毫米级别,简便实用且能满足广泛的实际应用需求。这一研究为激光雷达技术在高精度距离测量方面提供了可行的解决方案。In modern science and technology,LiDAR plays a key role in automatic navigation,industrial mapping and other fields,but the traditional phase ranging system has many problems such as low measurement accuracy and complex structure.A new high-precision phase laser radar ranging system is proposed in this paper.The system adopts the phase difference detection method of laser control with the same frequency reference,including the optical structure optimization of the laser transmitting and receiving modules,and the amplification filtering and differential mixing processing of the receiving circuit,and finally produces a high-resolution phase discrimination system based on AD8302.The experimental results show that the measurement accuracy of the system is millimeter level,which is simple and practical and can meet the needs of a wide range of practical applications.This research provides a feasible solution for LiDAR technology in high-precision distance measurement.

关 键 词：激光雷达 相位 精度 鉴相 

分 类 号：TN959.3[电子电信—信号与信息处理]