以“固定点-高温计”方式传递961．78℃以上国际温标  

Disseminating the International Temperature Scale above 961.78℃ in the ＂Fixed point- Pyrometer＂ Method

作　　者：卢小丰[1] 原遵东[1] 王景辉[1] 柏成玉[1] 董伟[1] 郝小鹏[1] 王铁军[1] 

机构地区：[1]中国计量科学研究院,北京100013

出　　处：《计量学报》2014年第3期193-197,共5页Acta Metrologica Sinica

基　　金：基金项目：国家科技平台基金（APT0812）

摘　　要：中国计量科学研究院在持续对高温基准装置研究工作的基础上，提升了光电高温计信噪比、非线性和辐射源尺寸效应等关键性能，并完善了光电高温计性能参数测量平台。与之前高温温标通过钨带灯传递不同，以“参考固定点-光电高温计”方式进行了银点以上高温温标的复现和传递，该方式可以避免光电高温计长期稳定性的影响，并将高温温度上限从2200℃延伸至2474℃，实验分析得到961．78—2474℃的温标扩展不确定度（k=2）为0．08—0．62℃。2009年中英西三国温标复现比对结果验证了三国国际温标的一致性，并支持了上述不确定度评定。新传递方法可为精密光电高温计提供最高水平校准，并可扩展应用于900nm等红外高温计校准。The high-temperature primary standard system was gradually improved through the continuing research work at the National Institute of Metrology （NIM） in China. Based on the developed primary standard pyrometer, an improved scheme, the ＂ fixed-point blackbody pyrometer＂ assembly, was applied to realize and disseminate the International Temperature Scale of 1990 （ITS-90） above the silver point. The new scheme can correct the drifts of the pyrometer and extend the highest temperature range from 2 200℃ to 2 474℃. The expanded uncertainties of the scale were 0. 08 - 0. 62℃ between the temperature range 961.78-474℃. The uncertainties of the temperature scale are strongly supported by the international comparison of the high temperature fixed points＇ ITS-90 values among China, the U K and Spain in 2009. The new method could be not only applied in the highest level calibration of the precise pyrometers, but also in the calibration of the 900 nm infrared thermometers.

关 键 词：计量学 国际温标 光电高温计 固定点 不确定度 

分 类 号：TB942[一般工业技术—计量学]