基于DTMF的煤矿井下安全警示系统的设计  

Design of safety warning system in coal mine based on DTMF

作　　者：陆静[1] 王计元[1] 

机构地区：[1]上海电力学院,上海200090

出　　处：《电子技术应用》2010年第3期124-126,共3页Application of Electronic Technique

基　　金：上海高校选拔培养优秀青年教师科研专项基金资助项目(Z-2006-56)

摘　　要：介绍了以单片机AT89S52和DTMF信令解码芯片MT8870为核心,通过PSTN电话网络远程遥控煤矿井下安全警示系统的工作原理。从硬件接口和软件设计两方面阐述了铃流检测、模拟摘挂机、DTMF信令解码、密码检测、输入信号分析处理等功能的实现方法。The working principle of remote control safety warning system in coal mine using PSTN telephone network is intro- duced, which is based on the single chip microcomputer AT89S52 and DTMF signaling decoder chip MT8870. The implement methods of various functions of ringing detection, simulation of picking up and hanging up the telephone, DTMF signaling decoder, password detection and input signal analysis and processing are clarified from the hardware interface and the software design aspects.

关 键 词：DTMF AT89S52 MT8870 安全警示 

分 类 号：TP368.4[自动化与计算机技术—计算机系统结构]