双成像云底高测量系统的研究
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摘要
云天自动化观测是气象业务发展必然的趋势。现有的云自动化观测仪器,价格昂贵,测量精度差,很难满足气象业务发展的要求,基于双目成像原理的可见光成像测云高和红外成像测云高相结合方案能够很好的解决白天和夜间云高的测量,本文分析了系统作用距离,给出了作用距离、目标辐射温差和大气影响因素三者之间的关系,并与现有云高测量设备进行了对比分析,通过试验实现了云底高的测量。
Automated observation for cloud sky is an inevitable trend in the development of meteorological services. The existing cloud automated observing instruments are expensive and with poor measurement accuracy,which is difficult to meet the requirements of meteorological business development. The combination of visible light imaging and high-infrared imaging cloud measurement based on binocular imaging principle can solve the problems of cloud height measurements both in daytime and nighttime. This paper analyzes the operating distance of the system,gives the relationship between the operating distance,target radiation temperature difference and atmospheric influence factors,and makes a comparative analysis with the existing cloud height measurement equipment,and realizes the measurement of cloud base height through experiments.
Automated observation for cloud sky is an inevitable trend in the development of meteorological services. The existing cloud automated observing instruments are expensive and with poor measurement accuracy,which is difficult to meet the requirements of meteorological business development. The combination of visible light imaging and high-infrared imaging cloud measurement based on binocular imaging principle can solve the problems of cloud height measurements both in daytime and nighttime. This paper analyzes the operating distance of the system,gives the relationship between the operating distance,target radiation temperature difference and atmospheric influence factors,and makes a comparative analysis with the existing cloud height measurement equipment,and realizes the measurement of cloud base height through experiments.
引文
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[2] SUN Xuejin,GAO Taichang,ZHAI Dongli,et al.Whole sky infrared cloud measuring system based on the uncooled infrared focal plane array[J].Infrared and Laser Engineering,2008,37(5):761-764.(in Chinese)孙学金,高太长,翟东力,等.基于非制冷红外焦平面阵列的全天空红外测云系统[J].红外与激光工程,2008,37(5):761-764.
[3] WANG Jimei,ZHANG Yimo,LIU Tiegen,et al.Portable lidar ceilometer for cloud-base height measurement[J].High Power Laser and Particle Beams,2005,17(9):1312-1316.(in Chinese)王青梅,张以谟,刘铁根,等.一种便携式激光测云仪的云底高度反演算法[J].强激光与粒子束,2005,17(9):1312-1316.
[4] ZHANG Wenxing,LV Daren,CHANG Youli.Afeasibility study of cloud base height remote sensing by simulating ground2based thermal infrared brightness measurements[J].Chinese J.Geophys,2007,50(2):354-363.(in Chinese)章文星,吕达仁,常有礼.地基热红外亮温遥感云底高度可行性的模拟研究[J].地球物理学报,2007,50(2):354-363.
[5] ZHANG Wenxing,LV Daren,XUAN Yuejian,et al.An experiment study of cloud cover detection by ground based sky thermal infrared brightness temperature measurements[J].Acta Meleorologica Sinica,2010,68(6):808-821.(in Chinese)章文星,吕达仁,宣越健,等.利用扫描式红外亮温仪对天空云量的试验观测[J].气象学报,2010,68(6):808-821.