数显技术是五十年代发展起来的一门新技术。由于电子技术的发展,促使这种新的数字检测元件用于机床的地置长度和角度的测量,它比起小型量具、量仪的测量优越得多。因为它直接作为机床位移或角度的动态显示,借助于电子技术的发展,目前的感应同步器、光栅、磁尺已达到精度0.01～0.001mm,角度±1角秒 Digital display technology is a new technology developed in the 1950s. Due to the development of electronic technology, this new digital detection element is used to measure the ground length and angle of the machine tool. It is much superior to the measurement of small measuring instruments and measuring instruments. Because it is directly used as a dynamic display of machine tool displacement or angle, with the development of electronic technology, the current induction synchronizer, grating, magnetic ruler has reached the accuracy of 0.01 ~ 0.001mm, angle ± 1 arc seconds