新国际单位制对电磁计量体系的影响

The Impact of the Electromagnetic Metrology System after the New International System of Units

从2019年5月起,以4个基本物理常数为基础的新国际单位制正式实施,全面实现了用基本物理常数定义基本单位、基本单位的量子化以及量子基准取代实物基准,开启了计量单位独立复现、不再依赖于国际计量局的全新局面。论述了新SI体系下电学计量体系相比于1990电学计量体系的变化,探讨了国际单位制变革所引发的电磁测量活动。

Since May 2019,the new international system of units(SI)based on the four fundamental physical constants has been formally implemented.The quantization of the basic units and the replacement of the artifact standards by the quantum standards open a new area,which can independently reproduce the fundamental SI units without the Bureau International des Poids et Mesures(BIPM).The major variations of the electrical units between the new SI and the original system in 1990 are mainly introduced.In the meantime,the changes for the electromagnetic measurement activities are also presented.