一、引言实际上,电流的国际单位制(SI)单位:安培,是借助于一组稳定的惠斯顿型标准电池和标准电阻保存在国际计量局(BIPM)和各国计量标准研究所中。而被称为电流的保存单位和 SI 单位之间的关系,则是通过基于某种电流力天平形式的绝对测量建立起来的。另一方面,这个关系也可通过适当地 I. INTRODUCTION In practice, the current SI unit: ampere is stored in the International Bureau of Metrology (BIPM) and the National Institute of Metrology Standards by means of a stable set of standard Wheaton-type batteries and standard resistors. The relationship between the unit of storage, called the current, and the unit of SI, is established by absolute measurements based on some form of current force balance. On the other hand, this relationship can also be achieved by appropriate