摘要
本文介绍了一个简单实用的信号转换变送电路,即如何将来自单片机的脉宽调制信号PWM转换变送为工业标准的电流信号(4-20mA)。文章描述了如何将一个单片机与模拟工控网相连接,把单片机的数字信号PWM传递到过程控制系统中去的方法。
A simple and practical signal conversion electric circuit is introduced in this paper, which can convers the PWM signal from single-chip microcomputer to industrial standard current signal（4-20mA）. The method is diseribed in the paper how to connect the single-chip microcomputer to analog industrial control network and deliver the PWM signal to the process control system.
出处
《传感器世界》
2006年第10期22-25,29,共5页
Sensor World
