从ITS-90过渡到1235K以上的初级温度计
Maria Jose Martin1, Jose Manuel Mantilla1
1Termodinamica y Medioambiente, Centro Español de Metrología, Madrid, Community of Madrid, Spain.
概括
现在使用初级温度计实现了重新定义的凯尔文 (K) 单位,将热力学温度 (T) 与银点以上的实用ITS-90尺度进行比较. 本研究回顾了放射性温度测量方法,以准确测量温度.
科学领域:
- 计量学 计量学 计量学
- 热力学是一种热力学.
- 物理 物理学 物理
背景情况:
- 国际单位系统 (SI) 根据基本常数重新定义了凯尔文 (K),需要实际实现方法 (mise en pratique - MeP).
- 初级温度计技术提供了热力学温度 (T),补充了现有的实用尺度,如1990年国际温度尺度 (ITS-90).
研究的目的:
- 描述和比较用于测量热力学温度 (T) 与银点 (1234.93 K) 以上的ITS-90 (T90) 的初级方法.
- 审查绝对和相对初级放射性温度计,评估它们的不确定性和实现重新定义的凯尔文的可行性.
主要方法:
- 使用普朗克辐射定律的放射性温度计,以绝对和相对形式.
- 初级温度计测量与ITS-90 (T90) 参考点的比较.
- 不同初级温度计方法的可行性和不确定性分析.
主要成果:
- 初级放射性温度计是一种可行的方法,可以实现在银点以上的热力学温度 (T).
- 绝对和相对放射测量方法在不确定性和实用性方面都有不同的优点和缺点.
- 来自西班牙测量中心的例子说明了这些方法的应用和比较.
结论:
- 凯尔文 (MeP-K) 的实践使得使用初级放射性温度计能够准确地实现银点以上的热力学温度 (T).
- 初级温度计提供了一个更基本的温度测量 (T) 与实用的ITS-90尺度 (T90) 相比.
- 了解这些主要方法的性能对于准确传播重新定义的凯尔文至关重要.
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