1.前言談到精密电气仪表,首先要想到“实驗室”的大形0.2級精密仪表。这种仪表虽已有較长历史,但是,至今在原理和結构上几乎都沒有什么变化。而測量技术和其他技术一样,經过第二次世界大战后的技术革新,主要是材料工艺或制造技术,电子技术都有极大发展,在指示仪表結构的改进和新測量技术探討等方面取得了較大的成就。交流精密測量(如果籠 1. Preface Speaking of precision electrical instruments, we must first think of “laboratory” large 0.2 precision instruments. Although this instrument has a long history, but so far in the principle and structure almost no change. Measurement technology, like other technologies, has made great achievements in technological innovation since the Second World War, mainly material technology or manufacturing technology and electronic technology, and has made improvements in the structure of indicator instruments and discussions on new measurement techniques A larger achievement. Exchange precision measurements (if cage