单片机控制的二线制变送器的设计与实现  

Design and Realization of Two-line Transfer Controlled by Single-chip Computer

作　　者：张锋[1] 

机构地区：[1]茂名学院计算机与电子信息学院,广东茂名525000

出　　处：《茂名学院学报》2005年第6期61-63,共3页Journal of Maoming College

摘　　要：介绍一种利用多功能前端测量电路采集数据来完成多种工程量的测量,并将测量的数据调制到两根电源线上使电源线同时作为数据线,实现与远端上位机控制板单向通信的单片机控制的硬件电路。电路基于单片机最小系统的设计,在智能自动化仪表可完成多种信号的测量,且比模拟的二线制变送器抗干扰能力强,有较好的实用价值。This paper mainly introduces a hardware circuit which uses multiplex forward measuring circuit to get forward data for measuring kinds of engineering item, and to modulate the data into the two power lines to realize the simplex transmission with the board controlled by a single - chip computer . The circuit is based on the design of the least system, and this functional circuit can be used in an automatic instrument to measure kinds of signals, having stronger anti - interaction power than that of analogy, with preferably practical value.

关 键 词：二线制变送器 传感器 调制解调 

分 类 号：TP368.1[自动化与计算机技术—计算机系统结构]