全天时便携式户外型红外探测气溶胶激光雷达系统设计及应用  

Design and application of all-day portable outdoor infrared detection aerosol lidar system

作　　者：庄鹏 谢晨波 康宝荣 刘建明 夏小维 Zhuang Peng;Xie Chenbo;Kang Baorong;Liu Jianming;Xia Xiaowei(School of Electrical Engineering,Tongling University,Tongling 244061,China;Anhui Lanke Information Technology Co.,Ltd.,Hefei 230031,China;Key Laboratory of Atmospheric Optics Anhui Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Hefei 230031,China;School of Mechanical Engineering,Chaohu University,Hefei 238000,China)

机构地区：[1]铜陵学院电气工程学院,安徽铜陵244061 [2]安徽蓝科信息科技有限公司,安徽合肥230031 [3]中国科学院安徽光学精密机械研究所中国科学院大气光学重点实验室,安徽合肥230031 [4]巢湖学院机械工程学院,安徽合肥238000

出　　处：《红外与激光工程》2024年第3期118-128,共11页Infrared and Laser Engineering

基　　金：安徽省自然科学基金项目(2208085UQ03);中国科学院合肥大科中心协同创新培育基金项目(2022HSC-CIP025);巢湖学院人才项目(KYQD-2023056)。

摘　　要：介绍了全天时便携式户外型红外探测气溶胶激光雷达的工作原理、系统设计与多种场景应用分析。红外探测气溶胶激光雷达具有大气穿透性强,受天空背景光影响小、对大粒子敏感等特点,在大气气溶胶污染时空分布特征获取、水平能见度监测和垂直边界层监测的应用上取得较好的效果。系统水平扫描可获取大区域颗粒物分布图,及时发现污染源并联合近地面风速风向、颗粒物和一氧化碳浓度等数据评估污染源影响程度,同时能够准确地反演水平能见度,与标准能见度仪比对相对误差均小于20%。激光雷达反演边界层高度采用消光系数梯度法,实验结果与探空气球反演绝对偏差为200 m,能够准确反演边界层高度。该系统能够实时精确地捕获大气气溶胶分布与传输情况,准确反演水平能见度、边界层高度等信息,在大气监测领域具有广泛的应用场景。Objective Air pollution control has higher requirements for environmental monitoring equipment.As an active remote sensing instrument,lidar is currently a powerful tool for monitoring the three-dimensional distribution characteristics of atmospheric aerosols in the troposphere.Lidar can compensate for the insufficient spatial distribution rate of existing ground monitoring data,mainly using various monitoring modes such as horizontal,vertical,navigation,and networking.Among them,horizontal scanning can effectively monitor horizontal visibility,dynamically extract the location and transmission path of pollution sources.Moreover,vertical monitoring can analyze the spatiotemporal changes in aerosol vertical diffusion,sedimentation transport,optical characteristics,boundary layer changes and their cloud information,as well as sand and dust monitoring.This article introduces a self-developed infrared lidar that can detect aerosol distribution,visibility,and boundary layer height in real-time under environmental pollution and multiple sudden weather conditions.It has unique advantages in analyzing the diffusion and sedimentation trends of polluted air masses.In the context of increasing observation needs,it can provide more scientific and effective data support for environmental management decisions and meteorological services.Methods The detection principle is based on the Mie scattering lidar equation.The schematic diagram and appearance of the aerosol lidar product structure are shown(Fig.2).The system mainly consists of three parts of laser emission unit,optical receiving unit,and data acquisition and processing unit.The main technical specifications are shown(Tab.1).The fundamental frequency 1064 nm linearly polarized laser of Nd:YAG laser is used as the detection light source,and the telescope uses an aspherical lens as the main mirror.The aspherical lens has the advantages of small aberration and short focal length,which can reduce the volume of the receiving module.The subsequent optical and detection units are

关 键 词：红外气溶胶激光雷达 颗粒物分布 能见度 边界层 

分 类 号：TN958.98[电子电信—信号与信息处理]