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1、摘要本文设计的是一种基于AT89C51单片机的远程电话控制系统。该系统是以AT89C51为核心、利用现有的个人通信终端,实现基于PLMN(陆基移动通信网>和PSTN(公用电话交换网>的电话远程控制系统。电话远程控制系统(ITRCS>,以CCITT<国际电报电话咨询委员会）及我国标准共同规定的部分标准程控交换信令(DTMF双音多频信号,振铃信号,回铃音信号等>作为系统控制命令,以PLMN与PSTN通信网作为传输介质,使用者可以在远端利用固定电话或移动电话发送DTMF双音多频信号,实现对近端电器设备的实时远程控制。该电话远程控制系统不需进行专
2、门的布线,不占用无线电频率资源,从而可避免电磁污染；且通过嵌入式的智能语音提示,突出的语音提示功能和密码控制系统,可使操作者根据各种提示音及时了解受控对象的有关信息。还可通过发出语音命令用电话远程控制多个受控对象,用户可以查询其状态,提供密码处理功能,只有输入正确的密码才能控制家电,从而提高了安全性。该系统设计实用，功能灵活多样，可靠性高，操作方便，可以广泛地应用于家庭或者其它场所的智能控制。 关键词 AT89C51；远程电话控制；DTMF；智能家电TheTelephoneRemoteControlSystemforHouseholdEl
3、ectronicApplianceBaseonTheMicrocontrollerb5E2RGbCAPAbstractThearticledesignedtheremotetelephonecontrolsystemwhichbasedonmicrocontrollerAT89C51.BasingonthePLMNandPSTN,thesystemwhichusesthecorecontrollerSingle-chipmicrocomputerAT89C51realizeslong-distancecontrolhouseholdapp
4、liances.Thetelephonecontrolsystem(ITRCS>whichusesthetelephonenetconvertandvoiceinformationreceivesDTMFcodefromthetelephonenet,andinterpretthecode,thecorecontrollercontrolsthestateofhouseholdappliancesrespondedto73/73theinterpretation.Longdistancecontroloftelephonedoesnotr
5、equirespecialwiresdistributionanddoesnottakeupwirelessfrequencyresources.Electromagneticpollutioncanthusbeavoided.Thedesigningofasystemoflong－distancecontrolbasedonsoundprocessingtechnologyandDTMFdecodingtechnologyispresentedinthispaper.Byusingsoundcommandsofsoundrecognit
6、iontechnology,thissystemrealizesitscontrolofhouseholdelectricalappliancesthroughtelephonenetworksandsorealizestheintelligentlycontroloftheminresidence.Theembeddedandintelligentsoundindication,itsoutstandingsoundfunctionofpromptanditscodecontrolsystemenabletheoperatorstoti
7、melyobtaintherelativeinformationofthecontrolledobjectsthroughindicatedsounds.Thesystemcanusetelephonetocontrolmanyhouseholdelectricalappliancesinlongdistancethroughutteringsoundcommandsandprovidesthecodesafeguardfunction.Onlythroughinputtingthecorrectpasswordtocontrolthem
8、,theuserscancontroltheconditionofhouseholdelectricalequipment,Sothesystemsecuritycanbeimproved.T
