中文摘要：
智能型家电（Smart Appliance）是未来白色家电的明星产品，其定义泛指主要用来作为连网用途或是在原有功能中加入连网功能的装置之统称。基于单片机AT89C51和计算机为核心,采用了双音多频解码集成电路MT8870、语音录放集成电路ISD1420和RS232/TTL的转换芯片和固态继电器,从而实现了智能网络型家电控制系统。采用开放式的设计方法，便于用户根据自身需求，进行各种扩展，包含常用接口,主要包括对振铃音的检测电路的设计，自动摘挂机,收发器串行通信的设计，控制电路AT89C51单片机和固态继电器，用C语言实现单片机下的软件编程，由于考虑到通信过程中存在干扰因素,所以对电路采用抗干扰设计的方法。最后通过单片机对固态继电器的闭合与断开进行控制，进而可以来控制家电的开关,来实现对家电的远程控制。可以广泛的应用于家用电器或者其它场所的各种控制设备。
关键词：双音多频解码；串行通信；远程智能控制；固态继电器；抗干扰
Title Intelligent Network Electrical Appliances Control System
Abstract：
Intelligent electronics products (Smart Appliance) is a future star white appliances products, Department refers to the definition used as a main link to the original purpose or function to add networking functions of the installations collectively. Based on AT89C51, and the computer as the core, using a DTMF decoder IC . Voice Recording and Playback IC ISD1420 and RS232/TTL conversion chips and solid-state relays, thus realizing the intelligent network appliance control system. The open design methods, user-friendly according to our own needs, for various extensions, and includes common interfaces. mainly covers the right ring tone detection circuit design, automatic Abstract hook, Transceivers serial communication theory, AT89C51 control circuit characteristics of the structure and principle C language of communication microcontroller programming software design; Due to the communication process interference factors exist, Therefore, the circuit design using the interference method. Finally through the serial port connected with the MCU, the MCU Solid State Relay closed with disconnected control, to realize the right remote control home appliances. Can be widely applied in household appliances, or other places of various control equipment.
Keywords：DTMF decoder；Serial communication；Remote Intelligent Control of Solid State；Relay interference
