The Research On Design And Realization Of Smart Home Control System

Home intelligent system appears in the later 1970's.In the middle of 1980's, home intelligent controller has come into being in western market.In January 1984,the first intelligent building was being put to use in America.Since then, intelligent building springs up in a lot of countries.At the same time,family and building intelligence also become the inevitable tendency of meeting the needs of people's living standard and life quality.Various family control systems have emerged as condition requires.Our country start much later in this field,so the urgent task is to develop our own home intelligent control system that can implement the basic functions as well as can fit the present condition of our country.Home intelligent control system has characteristics as follow:①network have the ability to communicate with network;②digitization make max use of digital technology;③intelligentization have the ability to memory and self-dispose in respect to control function.The major function of family intelligent control system includes family safety alarm,telephone long-range control and Infrared remote control as well as automatic watch control etc.Group network mode divides into two kinds:Wired group net and wireless group net.Wired group net is to organize net mainly using net line or the telephone line at home;while the major technology of Infrared is to use Home Reflect Frequency(HomeRF) technology,Bluetooth technology and HomePAN technique etc.This paper is to design a system,using telephone line to organize net, adopting DTMF(Dual Tone Multi-Frequency ) decode chip ht9200a and hm9270d,to unify all electrical equipment and safety alarm sensor at home into one network so as to realize the two-way function as long-range intelligent control and automatic alarm of electric appliance.The major content of this paper includes some following aspects:First, introduces the conception of Intelligent Control.;shows the overall structural block diagram and working principle of the system as well as explains the structure and function of every part.;introduces DTMF coding technique; Ringing detection circuit accounts for detection of ringing signals.Invitational telephone hang up/on circuit realizes invitational telephone hang on/up.DTMF coding circuit completes DTMF coding and decoding and signal sound detection. As the core part of this system,SCM(Single Chip Micyoco) realizes the intelligentization of the system;Last,Infrared remote control,realizes the intelligentization of lighting,how to receive,send the signal and code,decode the signal.The paper summarizes the characteristics of Home intelligent control system and also exemplifies its application.And furthermore,it has put forward some ideas on how to improve the system.This system has a simple design,low cost,and flexible organization.And the control scope can be big as well as be small.