基于DTMF的有线载波控制系统

Carrier control system based on DTMF

根据有线载波通信的原理和双音多频DTMF(DualToneMultiFrequency)编码,同时利用单片机实现对目标负载有线遥控的智能控制系统。介绍了有线载波数据传输的基本原理及利用DTMF信号编码的特点,给出了控制系统的硬件设计、模块组成及软件设计的程序流程。针对载波线路易受干扰,提出了系统的抗干扰措施。试验表明,控制系统稳定可靠,能够达到借助电力线实现载波控制的目的。

Based on the principle of carrier communication,an intelligent control system is presented,which applies single chip microcomputer and DTMF(Dual Tone Multi Frequency) coding technique to realize remote control of objective load. The principle of carrier data transmission is introduced,as well as the characteristics of DTMF coding. The hardware design,module configuration and pro-gram flowchart of software design are given. Measures of interference rejection are proposed. The test results show that the control system is stable and reliable,and meets the requirement of carrier control with power line.