去年,我们在原来的采用分立元件的差动变压器测量线路的基础上(见本刊一九七四年第四期《用差动变压器测量变形的数字显示装置》一文),改用集成元件,并对整机线路结构作了改进,使线路更为简化,装配调整更为简便。现概略介绍于下:(一)整机线路中(见图1),原线路的量程换档是采用改变交直流转换器的闭环放大倍数的办法来实现的,该方法的优点是能充分发挥交直流转换器的动态输出范围,即每一档量 Last year, on the basis of the original measurement circuit of differential transformer with discrete components (see our article “Digital Display Devices for Measuring Deformation with Differential Transformer”, Fourth Issue, 1974), we switched to integrated components, And the whole line structure has been improved to make the circuit more streamlined, easier to adjust the assembly. Now outlined in the following: (a) the whole line (see Figure 1), the original line range shift is to change the closed-loop magnification of the AC-DC converter to achieve this method has the advantage of being able to give full play AC and DC converter dynamic output range, that is, each file