一、前言差动变压器,从1950年前后在生产计量领域开始使用,到目前为止,进行了大量的研究,基本上解决了设计制作以及使用上的重要问题。由于在原子能领域,同原子炉的安全性试验研究相关联,要在300℃,17Mpa 高温高压水中使用,所以需要能耐热 I. Introduction Differential transformer, started to be used in the field of production measurement around 1950, so far, a great deal of research has been done, basically solving the important problems in design, manufacture and use. As in the field of nuclear energy, with the atomic safety test related to the need to 300 ℃, 17Mpa high temperature and pressure water, so you need to heat