摘要
介绍一种以MCS51单片机为核心、基于公共电话网的家用远程自动报警系统的设计与实现。介绍了该系统的基本工作流程和整个系统的组成结构,以及系统中无线发射和接收、单片机控制中心、DTMF(双音多频)收发电路、语音电路的工作原理及实现,重点阐述了无线发射和接收部分电路的工作原理、设计及实现,最后给出了系统整个软件控制及一些重要子程序的实现过程。
In this paper, a long-distance automatic alarm system is introduced. The system is realized with single-chip microcomputer MCS51, and is based on the telephone net. The paper discusses the principle and realization of its each circuit. The system is constituted of five parts, such as wireless transmitter and receiver, control center of a single-chip microcomputer, the receiving and dispatching of DTMF signal, and voice circuit. The part of radio transmitter and radio receiver is interpreted in particular. In the end, the system realization with software control is mentioned.
出处
《电子工程师》
2006年第5期62-65,共4页
Electronic Engineer
关键词
远程报警系统
DTMF
单片机
DTMF
long-distance alarm
single-chip microcomputer
