红外四谱段测温辐射计的电子学设计与实现
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摘要
为了给卫星上的红外辐射计做地面定标检测而设计了一种能自动测量海水表面温度的四谱段红外辐射计。文中针对红外辐射计的电子学系统进行了详细的设计,通过分光调制分别对3.5~4μm,8~13μm,10.3~11.3μm,11.5~12.3μm 4种波段的红外辐射进行采集和处理,利用双黑体标准辐射源实时自动校正系统参数和相应算法计算出当前海水表面的温度,并能在PC机上实时显示温度和保存数据的一种红外辐射系统。另外,通过A/D采样设计保证了系统采样分辨率0.1 K的要求。最后,通过分析该辐射计在南海所获得的数据,得到该系统满足了测温精度±0.5 K的技术指标要求。
A four-spectral infrared radiometer, which can automatically measure the temperature of sea surface, was designed to calibration and test the satellite on ground. The electronics system of the infrared radiometer was designed in detail using the spectral modulation, the wave length of 3.5-4 μm, 8-13 μm,10.3-11.3 μm, 11.5-12.3 μm infrared band was used to acquire and process the data. The temperature of the sea surface was computed by double blackbody standard source real-time automatic correction system parameters and corresponding algorithm. The designed infrared system could also display the temperature and save the data synchronously on PC. In addition, the requirement of sampling precision of 0.1 K was guaranteed by the design of A/D sampling. Finally, by analying the data acquired in south China sea,the measure precision of the system was verified in ±0.5 K, which can satisfy the technical requirement.
A four-spectral infrared radiometer, which can automatically measure the temperature of sea surface, was designed to calibration and test the satellite on ground. The electronics system of the infrared radiometer was designed in detail using the spectral modulation, the wave length of 3.5-4 μm, 8-13 μm,10.3-11.3 μm, 11.5-12.3 μm infrared band was used to acquire and process the data. The temperature of the sea surface was computed by double blackbody standard source real-time automatic correction system parameters and corresponding algorithm. The designed infrared system could also display the temperature and save the data synchronously on PC. In addition, the requirement of sampling precision of 0.1 K was guaranteed by the design of A/D sampling. Finally, by analying the data acquired in south China sea,the measure precision of the system was verified in ±0.5 K, which can satisfy the technical requirement.
引文
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[10]Yang Ciyin,Cao Lihua.Radiation calibration and error analysis for a large-aperture infrared opto-electric system[J].Infrared and Laser Engineering,2011,40(9):1624-1628.(in Chinese)杨词银,曹立华.大口径红外光电系统辐射定标及误差分析[J].红外与激光工程,2011,40(9):1624-1628.
[11]Lan Tiange,Fang Yonghua.New method of preprocessing infrared spectral signals[J].Infrared and Laser Engineering,2007,36(2):257-260.(in Chinese)兰天鸽,方勇华.红外光谱信号预处理的方法[J].红外与激光工程,2007,36(2):257-260.
[2]Dong Renjie,Li Tongji,Chen Qinglian,et al.Study on the method of vicarious calibration of satellite infrared radiometer based on ocean site[J].Ocean Technolgy,2006,25(2):73-77.(in Chinese)董仁杰,李铜基,陈清莲,等.星载红外辐射计海上辐射校正方法研究[J].海洋技术,2006,25(2):73-77.
[3]Branch R,Jessup A T,Minnett P J,et al.Comparisons of shipboard infrared sea surface skin temperature measurements from the CIRIMS and the M-AERI[J].J Atm&Oceanic Technol,2008,25(40):598-606.
[4]Minnett P J,Knuteson R O,Best F A,et al.The marineatmospheric emitted radiance interferometer:a highaccuracy,sea-going infrared spectroradiometer[J].J Atm&Oceanic Technol,2001,18(6):991-1013.
[5]Donion C,Robinson I S,Reynolds M,et al.An infrared sea surface temperature autonomous radiometer(ISAR)for deployment aboard volunteer observing ship(VOS)[J].J Atm&Oceanic Technol,2008,25(1):93-113.
[6]Donlon C J,Nightingale T J.The effect of atmospheric radiance errors in radiometric sea surface temperature measurements[J].Appl Opt,2000,39(15):2387-2392.
[7]Zhang Jian,Qu Enshi,Cao Jianzhong,et al.Study on a multi-spectral-band infrared sea surface temprature radiometer system[J].Acta Optica Sinica,2012,32(4):1-7.(in Chinese)张建,屈恩世,曹剑中,等.自动多波段红外海洋表面温度辐射系统研究[J].光学学报,2012,32(4):1-7.
[8]Fan Zheyuan,Yang Hongtao,Qu Enshi,et al.Design of long-wave infrared scan system with large field and large aperture[J].Infrared and Laser Engineering,2012,41(10):1-5.(in Chinese)范哲源,杨洪涛,屈恩世,等.大视场大相对孔径长波红外扫描光学系统设计[J].红外与激光工程,2012,41(10):1-5.
[9]Fu Wenyu.Analysis of noise performance forpyroelectric infrared sensor[J].Journal of Transducer Technology,2001,20(8):25-27.(in Chinese)付文羽.热释电红外传感器噪声特性分析[J].传感器技术,2001,20(8):25-27.
[10]Yang Ciyin,Cao Lihua.Radiation calibration and error analysis for a large-aperture infrared opto-electric system[J].Infrared and Laser Engineering,2011,40(9):1624-1628.(in Chinese)杨词银,曹立华.大口径红外光电系统辐射定标及误差分析[J].红外与激光工程,2011,40(9):1624-1628.
[11]Lan Tiange,Fang Yonghua.New method of preprocessing infrared spectral signals[J].Infrared and Laser Engineering,2007,36(2):257-260.(in Chinese)兰天鸽,方勇华.红外光谱信号预处理的方法[J].红外与激光工程,2007,36(2):257-260.