随着数字电子技术、数字集成电路以及与其相适应的各种数字传感器的发展,已使直线位移、旋转角度和转速等非电量的直接数字测量与显示成为可能。众所周知,一个数字测量或控制系统,依其所选用传感器工作原理之不同,其电路结构和逻辑电路的繁简 With the advent of digital electronics, digital integrated circuits and a variety of digital sensors that fit into it, direct digital measurements and displays of non-electrical quantities such as linear displacements, rotation angles and rotational speeds have been made possible. As we all know, a digital measurement or control system, according to the different working principle of the sensor of its choice, the circuit structure and the complexity of the logic circuit