基于DTMF的智能电话控制器.docx
- 文档编号:12448599
- 上传时间:2023-04-19
- 格式:DOCX
- 页数:14
- 大小:161.01KB
基于DTMF的智能电话控制器.docx
《基于DTMF的智能电话控制器.docx》由会员分享,可在线阅读,更多相关《基于DTMF的智能电话控制器.docx(14页珍藏版)》请在冰豆网上搜索。
基于DTMF的智能电话控制器
DTMF-basedintelligencetelephonecontroller
(Source:
Monolithicmachineanddyadicimplantationsystemapplication)
Abstract:
IntroduceonekindofDTMF(dual-tonemultifrequency)signalandRS485-basedlong-rangeintelligencecontroller.IthasringingdetectingandthesignalsimulatingOffHook,DTMFdecoding,infraredremotecontrolcodecertainlyliftsthefunctionstudyingandlaunchingthemulti-pathinfraredremotecontrolsignal's.Composition,hardwareallocation,softwaretothatcontrollerdesign,operatingprinciple,thefunctiondiscussdetailedlyaswellasthetechnologyfunctionhasbeeninprogressthemainbodyofabook.Thatcontrollerusesthequeen,testifiesthepersonconvenient,reliableandhaspracticalvalueinlong-rangeunderthecontrolofdataterminalsystem.
Keywords:
DTMF;RS485;Infraredremotecontrol;MT8870
1.Summary
Horizontalgoingastepfurtherimproveswiththeindustrialautomation,industrysceneguardinginalotofself-service,hopeisabletocarryoutlong-rangecontrollingonequipmentandmonitor,interposeswithdatacollectaswellasareinprogresstolong-rangedataterminal.Telephone'sgraduallyuniversalthesceneinstallsatelephonewilldoinindustrybecomingpossibility.Thein-bridgehavingdesignedandmakingonekindofDTMF(DualToneMultipleFrequency)-basedmultiplextelephonycontrolleraccordingtothiscondition,us,aslongaswithtelephonecontrollercanpassitrightawayonindustryscenetelephoneline,withusingtelephonenowandtheneverywheretoequipmentbeinprogresson-offcontrol,dataacquisition,long-rangeinterposeandsoon.Besides,horizontalceaselesssocietyeconomyrisealreadybeginsurgethefamilyautomation,peopleishopedbeingabletoputlong-rangesupervisorycontrolintopracticealwaysandeverywheretofamilysafetyandputslong-rangeunderthecontrolofintopracticetothehomeappliance.Becausethetelephonelineisthatthewholenationisnetworked,remotecontroldistancecanstrideovertheprovincecity.Beacontroller'sturntoadoptthemonolithicmachineandpronunciationchip,maymakeuseofpronunciationtohandlethehintbeinginprogresstodiversitymaycouplebacktheinformationsquarestateischargedtogether.
Picture1Principleblockdiagram
2.Compositionandprinciplecontrolling
2.1Thecontrolleroperatingprinciple
Theelectromechanicalincludesaroundnumberiftheroadpursuingwhatpicture1shows:
Ringingchecksandthesimulationextractstheelectromechanicalroute,MT8870waitforthedecodingcircuitbeingcomposedof,infraredgeneratethelaunchcircuit,octuplexswitchamountsimportandoctuplexswitchesamountsexportacontrolcircuit,pronunciationunderthecontrolofandrecordreadjustoneselftoacertainextentcircuit,clockcircuitbeingcomposedofDS12887,RS232orRS485stringstheinfraredsignalselfstudycircuitthatrowofthecircuitcommunicatingbyletter,appositionkeyboardandliquidcrystaldisplaycomposetogether.
Bethecontrolleroperatingprinciple'sturn:
Whileneedinglong-rangeunderthecontrolof,allocatesincethecorrespondingtelephonenumber,theringingdetectingcircuitcheckthebellstreamsignal.(Numberoftimescanpassasoftwareafterringingnumberoftimesreaches5timearbitrarilysetup),89C51controlthemonolithicmachinerealizingcircuitautomationOffHook,andthestartingpronunciationcircuitissuesahintimportingapassword.Thepasswordcarriesout
acheckbythatthereceivingcircuitreceivingandimportingmiddletomonolithicmachine,checkrightnesspromptsthenimportingthecontrolcommandkey,themonolithicmachinecarriesoutanalyseajudgement,andcorrespondingaccordingtoorderingarequesttobecompletedoperationonorder.Serveastheentering"*"keyqueen,theautomationrealizestelephoneon-hook,accomplishalong-rangeunderthecontrolofthereby.If30sinnerofOffHooknotimportingorderorthepassword,circuitmeetingautomationon-hook;Bythesametoken,ifimportingabuttonexceedalsoautomaticon-hookofeightkeys.
Thecontrollertheequipmentbeingabletostringthefunctiondoingthelong-rangecircuitrealizationinformationcollectcommunicatingbyletter,controllingsomeswitchamountsandhavinginfraredremotecontroltogetherbyRS485;Functionssuchasmaystartupbythefactthatthelong-rangetelephoneorcomputerinterposesregulartimeorshuttingmachinedown.
2.2Thecircuitiscomposedofhardware
2.2.1Ringingchecks,pluckstheelectromechanicalroad
TheringingcheckscircuitisthatcoupleT521-1and74LS123composefrombrightness.Shouldtherebetelephonebreathedoutfashionable,25Hz,90Vbellsignalsexportpulsesignalfromcommutationqueenphotoelectricityisolation.Inbeingpulse'sturntoimportto74LS123,74LS123makeminorpulsecountinginformingtheexpertwavesignal,sendinginthemonolithicmachine.Ding-dangcountingisreachedwhensettingupnumberoftimes,themonolithicmachine
Picture2Ringingchecks,pluckstheelectromechanicalroad
controlsthehighleveloutputing,messengeraudionleads,thereby,therelayattractsthesmallsidedoor,accomplishesasimulationextractingexpedientwork.Sincepronunciationsignalandpairofanaudiblesignalsvoltagearewaybelowbellsignalvoltage,beacircuit'sturntobeabletonotarouseanerroneousjudgementtherefore.Ringingchecks,plucksanelectromechanicaliftheroadpursuingwhatpicyure2shows.
2.2.2Dual-tonemultifrequencydemodulatorcircuit
MT8870isthattheDTMFsignalreceivesthespecialusechiphandling,whosefunctionistowillreceivethedecodingtoDTMAsignalfortwo4makesacode,fromQ1~Q4directoutput.AftersimulatingOffHook,thedual-tonemultifrequencysignalimportsafootbythatthecouplingisolationtransformercouplingentersMT8870.AfteranaudiblesignalfiltersthatpairexceptdialtonesignalfirstafterinternaldialtoneofMT8870wavefilter,sendinpairofVFwavefilteragainasaresultofpreposeanamplifier,pairofanaudiblesignalsissplitaccordingtoheight,thelowfrequencysignal,thedetectorsendsinthedecodingcircuitafterheight,lowfrequencywavefilter,extent,thefinaldataoutputfromMT8870holdscorrespondingcodeofoutput.ReceivetheAT89C51INT0forSTDgainingtheeffectivedata,MT8870.ThinkthatSTDelectricallevelreceivestheeffectivedialingkeyvaluecodefrombeingchangedintoheightlow,beingpassingtheP1mouthhighwaybythatAT89C51checksthequeen.Dual-tonemultifrequencydecodesacircuitifpursuingwhatpicture3shows.
Picture3Dual-tonemultifrequencydemodulatorcircuit
2.2.3Pronunciationcontroledandpronunciationrecordcircuit
Pronunciationunderthecontrolofandpronunciationrecordputinacircuitifpursuingwhat4shows,adopttheISD2590chiptodothefiguresoundrecordingcomponent.Recordputsintimemayamountto90ses,canbecontinuousrecordreadjustoneselftoacertainextentalsobeingabletoreadjustoneselftoacertainextentbythefactthataddresswireA0~A9choosespiecewiserecord.PronunciationchipISD2590movieselectionsinputendCEistostarttheplaybackperiodtimelowpulse.TheplaybacknotfollowingCEelectricallevelreturningtohighlybutisover.CEsignalcomingdownfollowstostartthesoundrecordingperiod.ThePDfootistoenterlow-powerconsumptionstatetimeheight.TheselectedplaybackhandlestheP/Rinputendforhighelectricityintheordinarytime,theselectedlowelectricitysoundrecordingtheordinarytimehandles.CorrespondingpronunciationDuanplayingcomestocometruefromthesoftware.ThesignalthatISD2590SP+,SP-holdgivestheamplificationbeinginprogresstillVFenlargescircuitLM386,gothroughtheisolationtransformercouplingagaintilltelephonecircuit,theconsumercanhearthehintthatsystemunderthecontrolofpronunciationchipissueslifromtelephone,tocarryoutcorrespondingoperation.
ISD2590
Picture4Pronunciationcontrolandpronunciationrecord
2.2.4Infraredlaunchcircuit
555formationproduces38.5kHzpulseoscillatingcircuitsfromtimebasecircuit,thelaunchrealizingthepassagechoiceoutputingwithGAL16V8logicarraycomponentandoverlayingthecarriersignalexporting38.5kHzactingas2803drivequeenswhocontroloutput,passthroughoctuplexdrivegoesout.MonolithicmachinethatP1.4,P1.5,P1.6areGAL16V8threepassagechoiceenteringof89C51,thatP1.7accomplishesmakestobeabletocontrol.ThinkthatP1.7isthatthehighelectricityforbidsoutputingintheordinarytime,;ThinkthatP1.7isthatthelowelectricityallowsoutputintheordinarytime.From89,C51monolithicmachinetimerT0controlstheinfraredpulsestringwidthandgap.Betoimprovetheanti-interferenceabilityandcarryoutreliablecommunication,someremotecontrolimplementneedstotheallkindsofguidancecodebethrustinto,forthepurposeofthereceiveriseasytodistinguishbeforedispatchingbinarysystemcode.Fortheremotecontrolimplementdistinguishingthedifferenttype,needtodispatchanaddresscodeandtocheckacode.Codestrongpointdispatchedbyother,differentremotecontrolimplementisneitheridentical.Theinfraredlaunchisascircuitalaspicturewhat5shows.
Picture5Infraredlaunchcircuit
2.2.5Othercircuit
ThecontrollerhasincreasedrealtimeclockcircuitDS12887,maybeprovidedstandardspacebysystem.Thecontrollerhasthetimingunderthecontroloffunctionatthesametime.
ThecontrollermaycommunicatebyletterbythefactthattheRS485long-rangecommunicatebyletterinterfaceandthesuperordinationcomputerareinprogress,m
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- 基于 DTMF 智能 电话 控制器