远程控制精准化灌溉系统中基于DTMF信号的数据传输技术

Data transmission technology based on DTMF signal for the remote control precision irrigation system

双音多频DTMF信令用于数据传输时,无需专用数据传输线且可靠性高,在远程控制精准化智能灌溉系统中是一项很有价值的工程应用信令.本研究在远程控制精准化智能灌溉系统数据和信令传输中引入了DTMF技术,阐述了DTMF编码的原理,研究了DTMF信号产生与检测的方法,并对DTMF信号进行有效的仿真分析.结果表明:采用DTMF信号来完成远程数据采集控制器与中心控制计算机的通信,实现远程灌溉设备的实时监控,灌溉数据采集具有良好的扩展性.

Dual tone multi-frequency（DTMF） signaling,without special data transmission line and high reliability in transmitting,is a valuable engineering application in the agricultural water-saving irrigation system by the remote control.In this study,DTMF technology was introduced into data and signal transmission,DTMF coding principle was described,and the production and detection methods of DTMF signal were also studied,meanwhile,DTMF signal was effectively simulated.The results showed that DTMF signal could be used in communication of remote data collector and center control computer,thus the remote irrigation equipment could be real-time controlled.