本文主要研究内容
作者邓迁（2019）在《拉曼激光雷达水汽探测自标定方法研究与全固态系统研制》一文中研究指出：地球大气中水汽的含量仅仅占整个空气体积比的0.1%～3%,但是水汽时空变化十分活跃,是地球大气中重要的温室气体之一,并且在全球水循环、天气系统、大气物理化学变化等过程中起着十分重要的作用。拉曼激光雷达可以探测水汽垂直分布廓线,具有探测精度高,时空分辨率高,能够连续探测等优点,但是其测量结果需要标定,现有标定方法(如无线电探空仪、GPS、微波辐射计等)不能满足当前对水汽长期高精度测量的要求,目前水汽拉曼激光雷达的标定已经成为限制该技术被广泛应用的瓶颈;传统水汽拉曼激光雷达通常采用高能量水冷激光器,体积和功耗较大,不利于小型集成化设计,且水冷激光器需要经常换水和氙灯,维护不便,这也限制了拉曼激光雷达水汽探测的应用场景。本文着重于水汽混合比双波长自标定方法研究和全固态拉曼激光雷达系统研制这两方面开展研究工作,主要内容如下:(1)水汽探测综述以及水汽拉曼激光雷达仿真。概述了大气水汽性质及其重要性,总结了大气水汽的分布及其变化特征,对常见的水汽探测方法进行了简要分析,并列举了国内外典型水汽探测拉曼激光雷达的研究进展;介绍了激光雷达基础理论,给出了水汽探测相关的物理参数及其转化关系,推导出拉曼散射频移和散射截面,结合已有的大气模型和回波信号模型,模拟计算得到水汽拉曼激光雷达回波信号,并根据拉曼激光雷达噪声模型给出了信噪比计算公式,依照信噪比公式,基于matlab平台设计了水汽探测拉曼激光雷达选型仿真软件,为确定拉曼激光雷达的技术参数和总体结构,了解其探测水汽的性能提供了参考。(2)拉曼激光雷达双波长自标定方法研究。详细论述了双波长自标定方法:通过对水汽拉曼激光雷达进行适当的改进,使其水汽拉曼通道能够分时测量空气分子的瑞利散射回波信号,并结合氮气拉曼通道测量的氮气分子的拉曼散射回波信号,计算得到未标定的大气中氮气混合比。根据大气中氮气混合比是已知的,从而推导出水汽混合比标定系数只与滤光片透过率比值以及后向散射截面比值有关,通过计算得到拉曼激光雷达测量水汽混合比的标定常数,此即为双波长自标定方法。为了验证该标定方法正确性,搭建了双波长拉曼激光雷达水汽探测实验平台,并开展了与无线电探空仪水汽探测对比实验,最后给出了数据处理和反演算法,测量结果表明:氮气混合比的标定常数为0.545±0.031,相对误差为5.7%,标定后的水汽混合比与无线电探空仪测量的水汽混合比数据一致性较好,验证了水汽混合比双波长自标定方法的正确性,说明双波长拉曼激光雷达系统具有实现水汽混合比自标定的能力。(3)全固态拉曼激光雷达系统研制与标定。研制了一台集成度非常高的全固态紫外拉曼激光雷达水汽探测系统,能够昼夜连续测量水汽的时空分布,白天和晚上的有效探测高度分别达到了2km和5km,水汽混合比测量误差小于10%。全固态设计使该激光雷达系统有很好的环境适应性,并且操作和维护非常简单,非常适用于长期的外场测量试验。高集成度的结构设计,使其能够安装在一个扫描叉架上,实现对半球天空中的水汽分布进行扫描探测。并且利用双波长自标定激光雷达进行了传递标定,标定结果与无线电探空仪进行了对比,进一步验证了双波长自标定方法不同波长的适用性。(4)高重频全固态拉曼激光雷达水汽探测初步探索。在双波长自标定拉曼激光雷达系统上进行改进,采用高重频全固态双波段激光器代替原有水冷Nd:YAG激光器,并且采用高速光子计数卡采集,初步获得了有效数据,夜晚探测高度可达2km,验证了高重频全固态拉曼激光雷达系统方案可行。
Abstract
de qiu da qi zhong shui qi de han liang jin jin zhan zheng ge kong qi ti ji bi de 0.1%～3%,dan shi shui qi shi kong bian hua shi fen huo yue ,shi de qiu da qi zhong chong yao de wen shi qi ti zhi yi ,bing ju zai quan qiu shui xun huan 、tian qi ji tong 、da qi wu li hua xue bian hua deng guo cheng zhong qi zhao shi fen chong yao de zuo yong 。la man ji guang lei da ke yi tan ce shui qi chui zhi fen bu kuo xian ,ju you tan ce jing du gao ,shi kong fen bian lv gao ,neng gou lian xu tan ce deng you dian ,dan shi ji ce liang jie guo xu yao biao ding ,xian you biao ding fang fa (ru mo xian dian tan kong yi 、GPS、wei bo fu she ji deng )bu neng man zu dang qian dui shui qi chang ji gao jing du ce liang de yao qiu ,mu qian shui qi la man ji guang lei da de biao ding yi jing cheng wei xian zhi gai ji shu bei an fan ying yong de ping geng ;chuan tong shui qi la man ji guang lei da tong chang cai yong gao neng liang shui leng ji guang qi ,ti ji he gong hao jiao da ,bu li yu xiao xing ji cheng hua she ji ,ju shui leng ji guang qi xu yao jing chang huan shui he xian deng ,wei hu bu bian ,zhe ye xian zhi le la man ji guang lei da shui qi tan ce de ying yong chang jing 。ben wen zhao chong yu shui qi hun ge bi shuang bo chang zi biao ding fang fa yan jiu he quan gu tai la man ji guang lei da ji tong yan zhi zhe liang fang mian kai zhan yan jiu gong zuo ,zhu yao nei rong ru xia :(1)shui qi tan ce zeng shu yi ji shui qi la man ji guang lei da fang zhen 。gai shu le da qi shui qi xing zhi ji ji chong yao xing ,zong jie le da qi shui qi de fen bu ji ji bian hua te zheng ,dui chang jian de shui qi tan ce fang fa jin hang le jian yao fen xi ,bing lie ju le guo nei wai dian xing shui qi tan ce la man ji guang lei da de yan jiu jin zhan ;jie shao le ji guang lei da ji chu li lun ,gei chu le shui qi tan ce xiang guan de wu li can shu ji ji zhuai hua guan ji ,tui dao chu la man san she pin yi he san she jie mian ,jie ge yi you de da qi mo xing he hui bo xin hao mo xing ,mo ni ji suan de dao shui qi la man ji guang lei da hui bo xin hao ,bing gen ju la man ji guang lei da zao sheng mo xing gei chu le xin zao bi ji suan gong shi ,yi zhao xin zao bi gong shi ,ji yu matlabping tai she ji le shui qi tan ce la man ji guang lei da shua xing fang zhen ruan jian ,wei que ding la man ji guang lei da de ji shu can shu he zong ti jie gou ,le jie ji tan ce shui qi de xing neng di gong le can kao 。(2)la man ji guang lei da shuang bo chang zi biao ding fang fa yan jiu 。xiang xi lun shu le shuang bo chang zi biao ding fang fa :tong guo dui shui qi la man ji guang lei da jin hang kuo dang de gai jin ,shi ji shui qi la man tong dao neng gou fen shi ce liang kong qi fen zi de rui li san she hui bo xin hao ,bing jie ge dan qi la man tong dao ce liang de dan qi fen zi de la man san she hui bo xin hao ,ji suan de dao wei biao ding de da qi zhong dan qi hun ge bi 。gen ju da qi zhong dan qi hun ge bi shi yi zhi de ,cong er tui dao chu shui qi hun ge bi biao ding ji shu zhi yu lv guang pian tou guo lv bi zhi yi ji hou xiang san she jie mian bi zhi you guan ,tong guo ji suan de dao la man ji guang lei da ce liang shui qi hun ge bi de biao ding chang shu ,ci ji wei shuang bo chang zi biao ding fang fa 。wei le yan zheng gai biao ding fang fa zheng que xing ,da jian le shuang bo chang la man ji guang lei da shui qi tan ce shi yan ping tai ,bing kai zhan le yu mo xian dian tan kong yi shui qi tan ce dui bi shi yan ,zui hou gei chu le shu ju chu li he fan yan suan fa ,ce liang jie guo biao ming :dan qi hun ge bi de biao ding chang shu wei 0.545±0.031,xiang dui wu cha wei 5.7%,biao ding hou de shui qi hun ge bi yu mo xian dian tan kong yi ce liang de shui qi hun ge bi shu ju yi zhi xing jiao hao ,yan zheng le shui qi hun ge bi shuang bo chang zi biao ding fang fa de zheng que xing ,shui ming shuang bo chang la man ji guang lei da ji tong ju you shi xian shui qi hun ge bi zi biao ding de neng li 。(3)quan gu tai la man ji guang lei da ji tong yan zhi yu biao ding 。yan zhi le yi tai ji cheng du fei chang gao de quan gu tai zi wai la man ji guang lei da shui qi tan ce ji tong ,neng gou zhou ye lian xu ce liang shui qi de shi kong fen bu ,bai tian he wan shang de you xiao tan ce gao du fen bie da dao le 2kmhe 5km,shui qi hun ge bi ce liang wu cha xiao yu 10%。quan gu tai she ji shi gai ji guang lei da ji tong you hen hao de huan jing kuo ying xing ,bing ju cao zuo he wei hu fei chang jian chan ,fei chang kuo yong yu chang ji de wai chang ce liang shi yan 。gao ji cheng du de jie gou she ji ,shi ji neng gou an zhuang zai yi ge sao miao cha jia shang ,shi xian dui ban qiu tian kong zhong de shui qi fen bu jin hang sao miao tan ce 。bing ju li yong shuang bo chang zi biao ding ji guang lei da jin hang le chuan di biao ding ,biao ding jie guo yu mo xian dian tan kong yi jin hang le dui bi ,jin yi bu yan zheng le shuang bo chang zi biao ding fang fa bu tong bo chang de kuo yong xing 。(4)gao chong pin quan gu tai la man ji guang lei da shui qi tan ce chu bu tan suo 。zai shuang bo chang zi biao ding la man ji guang lei da ji tong shang jin hang gai jin ,cai yong gao chong pin quan gu tai shuang bo duan ji guang qi dai ti yuan you shui leng Nd:YAGji guang qi ,bing ju cai yong gao su guang zi ji shu ka cai ji ,chu bu huo de le you xiao shu ju ,ye wan tan ce gao du ke da 2km,yan zheng le gao chong pin quan gu tai la man ji guang lei da ji tong fang an ke hang 。
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论文作者分别是来自中国科学技术大学的邓迁，发表于刊物中国科学技术大学2019-07-12论文，是一篇关于拉曼激光雷达论文,水汽混合比论文,自标定方法论文,全固态论文,中国科学技术大学2019-07-12论文的文章。本文可供学术参考使用，各位学者可以免费参考阅读下载，文章观点不代表本站观点，资料来自中国科学技术大学2019-07-12论文网站，若本站收录的文献无意侵犯了您的著作版权，请联系我们删除。
标签：拉曼激光雷达论文; 水汽混合比论文; 自标定方法论文; 全固态论文; 中国科学技术大学2019-07-12论文;