红外高光谱大气探测仪星载固定点黑体辐射源的研制

介绍了中国计量科学研究院为风云三号05星红外高光谱大气探测仪研制的微型镓固定点星载黑体辐射源。设计了黑体辐射源空腔,其有效发射率优于0.997。针对星载固定点黑体辐射源的结构设计和性能测试展开了研究:星载固定点黑体辐射源17 ℃的温度均匀性仿真结果优于0.01℃;黑体辐射源在真空下均匀性优于0.02 ℃,稳定性优于0.002 ℃(90 min内);在通过满足航天应用的力学冲击等实验后,镓固定点的复现性优于0.03 ℃;微型固定点相变温坪复现实验加热功率与拐点值之间存在较好的线性关系。

Development of Blackbody Radiation Sources at Fixed Point on Satellite of Infrared Hyperspectral Atmospheric Detector

The miniature gallium fixed point onboard blackbody radiation source developed by National Institute of Metrology for the infrared hyperspectral atmospheric detector of Fengyun No.3 05 satellite is introduced. The black body radiation source cavity is designed, and the effective emissivity of the black body radiation source is better than 0.997. The structure design and performance test of blackbody radiation source with fixed point on satellite are studied. Blackbody radiation source uses double heating, one PID control output, one constant power output. Thermal simulation of spaceborne fixed point blackbody radiation source at 17 ℃, the temperature uniformity result is better than 0.01 ℃. The results of uniformity and stability of blackbody radiation source in vacuum are better than 0.02 ℃ and better than 0.002 ℃ (within 90 min), respectively. The reproducibility of the gallium fixed point is better than that of 0.03 ℃ by satisfying the mechanical impact test of aerospace application. There is a good linear relationship between the heating power and the inflection point value in the micro-fixed point phase transition temperature plateau reappearance experiment.