论文部分内容阅读
电容测微计算得上是近年来发展最快的位移测量方法之一。其原理十分简单,由两块平行的金属板就可以构成一电容器,被测量的机械位移无论是改变极板间距、还是它们的相对面积或者介质特性,均能通过传感器电容量的变化转换成电讯号。早在1910年,维利(Villey J.)就开始运用电容的变化来测量小位移。但是直到惠丁顿(Whiddington R.1920)的“超测微计”问世后,这种原理才被人们广泛注意。当时这部仪器已能测量电极间距1A(埃=10~(-8)厘米)的变化。而在用变压器比率臂电桥代替谐振法
Capacitance micrometer calculation is one of the fastest growing displacement measurement methods in recent years. The principle is very simple, the two parallel metal plates can form a capacitor, the measured mechanical displacement either change the plate spacing, or their relative area or medium characteristics, can be converted by the sensor capacitance changes into telecommunications number. As early as 1910, Villey J. began to measure changes in capacitance to measure small displacements. However, this principle was not widely observed until the advent of the “super-micrometer” of Whiddington R.1920. At that time this instrument had been able to measure changes in the electrode spacing 1A (A = 10 ~ (-8) cm). In contrast with the ratio of transformer arm bridge instead of resonance method