文档介绍：基于单片机的电话远程控制系统
目录
1绪论 3
2系统设计原理 5
硬件功能分析 5
软件模块分析 7
3 系统硬件电路设计 8
8
8
电路图设计 8
摘挂机控制电路 9
9
电路图设计 10
核心AT89C2051芯片介绍 10
双音频DTMF解码电路 11
电路工作原理 11
电路图设计 12
核心MT8870芯片介绍 12
MT8870解码表 13
家用电器控制电路 14
电路工作原理 14
电路图设计 14
核心74LS273芯片介绍 15
信息反馈电路 16
电路工作原理 16
音乐集成电路芯片介绍 17
17
4系统软件设计 18
软件设计原理 18
系统程序设计流程图 18
5结束语 19
参考文献 21
附录一电路总图 22
附录二程序清单 23
基于单片机的电话远程控制系统
摘要:随着通讯产业的迅速发展,电话机已经走进了千家万户,,众所周知,近几年通信和电子信息技术行业有了长足发展,本文设计了一种电话远程控制系统,该系统以AT89C2051单片机和MT8870双音多频解码集成电路为核心,借助公共电话网络,通过电话实现对远程设备智能化控制。文章介绍了系统的组成、工作原理及程序设计方法。对“振铃检测、模拟摘挂机控制、双音频解码,语音提示及家用电器控制”等电路作了详细的说明。用户在户外可通过任意一部双音多频电话(包括手机、电话分机),根据语音提示,可以对各种电器(如电饭锅、微波炉等电器)进行远程控制。本装置适用于家庭、企事业单位、商店等场所,操作简单方便,系统性能可靠,是未来很有发展前景的科技产品.
关键词:AT89C51单片机;双音多频DTMF解码电路;振铃检测;摘挂机控制
Abstract:As the development munication, telephone is widely used all over the world. This is our motive that how to make the long-distance control system based on work used in our daily life. As we all know that there is a great development munication and electrical technology. In this article a long-distance control system based on work is designed. It can also be called intelligence control system. Depend on work of telephone, some functions of the long-distance control system e true. In this article pose of the control system and the principle about the long-distance control system are introduced. To meet the needs of long-distance and management of automation industry equipments based work munication. The system about long-distance control model and its architecture were put forward, and operation principles of the system were discussed in detail.
Keywords: Intelligence; Controller; Communication; Long-distance
1绪论
21世纪是信息时代,各种电信新技术推动了人类文明的进步。自从1876年,Alexander Graham Bell(贝尔)发明电话以来,世界各国的电话网络发展非常迅速。进十年来,中国的固定电话业务呈现出举世瞩目