太阳辐照度绝对辐射计的光电不等效性修正  

Non-equivalence correction of solar irradiance absolute radiometer

作　　者：唐潇[1,2] 贾平[1] 王凯[1] 宋宝奇[1] 方伟[1] 王玉鹏[1] TANG Xiao JIA Ping WANG Kai SONG Bao-qi FANG Wei WANG Yu-peng(Changchun Institute of Optics Chinese Academy of Sciences University of Chinese Academy of , Fine Mechanics and Physics, Changchun 130033, China Sciences, Beijing 100049, China)

机构地区：[1]中国科学院长春光学精密机械与物理研究所,吉林长春130033 [2]中国科学院大学,北京100049

出　　处：《光学精密工程》2016年第10期2370-2376,共7页Optics and Precision Engineering

基　　金：国家自然科学基金资助项目(No.41474161);国家863高技术研究发展计划资助项目(No.2015AA123703)

摘　　要：针对绝对辐射计光电不等效性来源复杂、实验测量难度大的特点,提出了修正太阳辐照度绝对辐射计(SIAR)光电不等效性的有限元单元法。结合SIAR的测量方法,对真空中辐射计的腔温响应进行了实验测试。基于有限元单元法,建立了与实验腔温度响应相对误差仅为0.14%的有限元模型,对接收腔的温度响应进行了实验测试。测试结果显示:入射光功率为73.8mW时,接收腔与热沉之间的温度差异约为0.85K,响应的时间常数为29.8s。运用建立的有限元模型对SIAR的光电不等效性进行了评估和修正。结果表明:太阳辐照度绝对辐射计的光电不等效性来源主要为不同加热途径和不同加热区域引起的偏差,SIAR的光电不等效性因子N为0.999 621±0.000 004。该修正模型完善了仪器的修正体系,提高了测量精度,为绝对辐射计的发展提供了可靠的数据来源。As the non-equivalence of absolute radiometers has complex sources and it is difficult to be measured,this paper proposes the finite element method to correct the non-equivalence of a Solar Irradiance Absolute Radiometer（SIAR）.On the basis of the measuring method the SIAR,the nonlinear thermal dynamic response of the cavity in vacuum was tested.A finite element model with a relative error of 0.14%for an experimental cavity was established based on the finite element method to test the temperature response of the receiving cavity.The experimental results show that the temperature difference between the receiving cavity and the heat sink is approximately 0.85 Kand the time constant is 29.8swhen input optical power is 73.8mW.The finite element method was employed to estimate and correct the non-equivalence of the absolute radiometer.It indicates that the source of non-equivalence of SIAR mainly comes from the drifts driven by different heating paths and areas,and thecorrectional factor of non-equivalence for the SIAR is 0.999 621±0.000 004.The finite element correct model completes the correctional system of SIAR and significantly increases the accuracy of the SIAR.It is helpful to improve the future design of absolute radiometers.

关 键 词：太阳辐照度绝对辐射计 有限元单元法 光电不等效性 温度响应 

分 类 号：P414.51[天文地球—大气科学及气象学]