热电桥型太阳绝对辐射计设计  

Design of thermoelectric bridge solar absolute radiometer

作　　者：王举光 杨东军[1] 隋龙[1] 叶新[1] 贾瑞栋 WANG Ju-guang;YANG Dong-jun;SUI Long;YE Xin;JIA Rui-dong(Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Science,Changchun 130033,China;University of the Chinese Academy of 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：《激光与红外》2024年第12期1913-1919,共7页Laser & Infrared

基　　金：国家重点研发计划“太阳绝对光谱辐照度测量基准载荷工程技术”项目(No.2022YFB3903100,No.2022YFB3903105)资助。

摘　　要：太阳绝对辐射计(SIAR)采用热电堆型探测器将入射太阳光功率转换为电功率,实现太阳总辐照度测量,但热电堆探测器存在以下局限性:首先,受热电偶数量的限制,难以进一步提高灵敏度;其次,受制作工艺复杂的限制,主备腔一致性难以保证。为了解决这些问题,本文基于惠斯通桥高互换性、高分辨率的特性,采用全新的探测器锥腔结构和全新的热连接方式,研制了一台具有高灵敏、高精度的热电桥型绝对辐射计。测试结果表明:探测器时间常数9.69 s,灵敏度0.078 W/m^(2),钨灯光源测量重复性优于0.07%,满足0.1%精度太阳总辐照度观测需求。The solar irradiance absolute radiometer(SIAR)adopts the thermopile-type detector to convert incident solar light power into electrical power,achieving the measurement of total solar irradiance.However,the thermopile detector has the following limitations.Firstly,it is difficult to further improve the sensitivity due to the limitation of the number of thermocouples.Secondly,the consistency of the main and backup chambers is difficult to be ensured due to the limitation of the complex fabrication process.To solve these problems,this paper develops a thermoelectric bridge absolute radiometer with high-sensitivity and high-precision based on the high interchangeability and high-resolution characteristics of the Wheatstone bridge,and adopts a new detector cone cavity structure and a new thermal connection method.The test results show that the time constant of the detector is 9.69 s,the sensitivity is 0.078 W/m^(2),and the measurement repeatability of tungsten light source is better than 0.07%,which can meet the observation requirements of total solar irradiance with a precision of 0.1%.

关 键 词：绝对辐射计 太阳总辐照度 惠斯通桥 热电桥型探测器 测量电路 

分 类 号：TP274[自动化与计算机技术—检测技术与自动化装置] TH741[自动化与计算机技术—控制科学与工程]