摘要
利用半导体制冷技术与热管技术,研制了低温达-30℃的新型低温黑体辐射源。通过实验得到其温度稳定性优于0.02℃/20min,均温区腔壁的轴向温度均匀性优于0.3℃,热管空腔有效发射率计算值大于0.9992。利用基于光线跟踪技术的Monte Carlo方法,计算得出该热管空腔发射率从中心到边缘位置的变化规律为逐渐减小的趋势,发射率的平均变化率仅为0.06‰,说明轴向温场均匀性对法向平均有效发射率的影响较小。
A new low-temperature blackbody radiation source is developed as low as -30 ℃ by semiconductor refrigeration technology and heat pipe technology. The temperature stability is better than 0.02 ℃/20 min, axial temperature uniformity of this cavity wall is better than 0. 3 ℃ and the effective emissivity of the heat pipe cavity is higher than 0. 9992 by experimental research. The effective emissivity of the blackbody cavity is evaluated by optical ray tracing with a Monte Carlo method, it is calculated that the emissivity of the heat pipe cavity from the center to the edge is gradually decreasing, and the average rate of change of the emissivity is only 0. 06 ‰, it shows that the axial uniformity of the temperature field has little effect on the normal mean effective emissivity.
出处
《计量学报》
CSCD
北大核心
2017年第5期589-592,共4页
Acta Metrologica Sinica
基金
国家质检公益性行业科研专项(200910106)
关键词
计量学
低温黑体
热管
发射率
均匀性
稳定性
metrology
low-temperature blackbody
heat pipe
emissivity
uniformity
stability
