CAJ | 학술논문

研制了一台探测大气温度、气溶胶、卷云的瑞利-拉曼-米氏激光雷达(RRML),介绍了激光雷达的设计方法,基于单片机实现了光电倍增管门控电路.通过数值模拟计算大气后向散射回波信号,分析仿真信号的特征,作为激光雷达设计的参考.通过设计合理的接收光路,采用极高灵敏度的R4632光电倍增管以及微弱信号光子计数技术,提高瑞利和拉曼微弱信号的信噪比(SNR).为了实现瑞利-拉曼-米氏激光雷达对大气气溶胶和卷云的联合探测,532 am回波信号采取高低分层技术,通过对气溶胶和卷云的回波光加衰减和探测器门控两种手段相结合,保证了R4632光电培增管极高的灵敏度探测器对大气气溶胶和高层卷云回波信号的线性检测,从而实现一台激光雷达对大气温度、气溶胶和卷云的探测.试验表明,信号检测单元的设计满足测量精度的要求.
연제료일태탐측대기온도、기용효、권운적서리-랍만-미씨격광뢰체(RRML),개소료격광뢰체적설계방법,기우단편궤실현료광전배증관문공전로.통과수치모의계산대기후향산사회파신호,분석방진신호적특정,작위격광뢰체설계적삼고.통과설계합리적접수광로,채용겁고령민도적R4632광전배증관이급미약신호광자계수기술,제고서리화랍만미약신호적신조비(SNR).위료실현서리-랍만-미씨격광뢰체대대기기용효화권운적연합탐측,532 am회파신호채취고저분층기술,통과대기용효화권운적회파광가쇠감화탐측기문공량충수단상결합,보증료R4632광전배증관겁고적령민도탐측기대대기기용효화고층권운회파신호적선성검측,종이실현일태격광뢰체대대기온도、기용효화권운적탐측.시험표명,신호검측단원적설계만족측량정도적요구.
A Rayleigh-Raman-Mie lidar(RRML)signal detection and optical receiver unit is constructed,the principle of lidar design is emphatically introduced,the design is based on the simulated calculation on atmosphere backscatter signal.The purpose ot the signal detection unit is to improve the signal to noise ratio(SNR)of the lidar signal.By rational design the signal detection and optical receiver unit,use extremely sensitive R4632 photomultiplier tube(PMT)and photo counting method,a good SNR of Raman and Rayleigh signal could received.Through construct the PMT gating control and signal attenuation unit,a linear detection of aerosol and cirrus signal is received.Finally,the experimental result shows the rationality of the signal detection and optical receiver unit design method.