目前数字显示的精密测量系统(以下简称 DPRO)有各种型式,本文先对其原理、构造作一概述,然后重点叙述有关磁尺最近的动向并介绍一些实例。一、增量式和绝对式DPRO 的变换器,按得到电信号的方法分为增量式和绝对式。增量式变换器,是将机械的单位移动量(增量)转变为脉冲信号,并将输出的脉冲信号采用累 Currently there are various types of precision measurement systems for digital display (hereinafter referred to as DPRO). In this paper, an overview is given of the principle and structure, and then the recent trends of the magnetic ruler are described and some examples are introduced. First, the incremental and absolute DPRO converter, according to the method of obtaining the electrical signal is divided into incremental and absolute. Incremental converter, is the mechanical movement of the unit (incremental) into a pulse signal, and the output of the pulse signal is tired