家用语音拨号报警系统设计.doc

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1、。摘要摘要不分段采用AT89C51单片机作为控制核心，外接E2PROM用于存储电话号码、设置参数(定时布/撤防、联动、水等)以及警情信息等。当AT89C51单片机实时巡检到新的警情信号时，报警主机就会自动进行警情处理(声光报警、启动相应联动、记录警情以及拨号报警等)。拨号报警的工作原理如下：系统自动地控制摘／挂机电路模拟摘机，同时AT89C51单片机通过可编程并行接口8255将MT8880置为呼叫模式，检测是否有拨号音。若有拨号音，则将MT8880设为突发方式，并按用户预设的电话号码自动拨号。拨完电话号码以后立即检测对方是否摘机

2、，一旦检测到对方摘机，就启动语音提示电路发送与警情相一致的语音信息，完成自动拨号报警。重点论述了自动拨号和语音部分的电路结构、工作原理和软件设计方法。关键字：单片机自动拨号语音芯片信号音检测—29—ABSTRACTABSTRACTAdopttheAT89C51singleslicemachineistocontrolcoreandcircumscribeE2PROMstousedforsavingtelephonenumber,constitutionparameter(infixedtimecloth/withdrawagar

3、sion,alliedmove,wateretc.)andJingfeelinginformationetc..WhentheAT89C51singleslicethemachinebesolidhourcruisetochecknewJingfeelingsignal,reporttothepolicethehostwillautomaticallycarryonJingfeelingaprocessing.(soundandlightreporttothepolice,thestartcorrespondalliedmove

4、,recordJingfeelingandstirnumbertoreporttothepoliceetc.)Stirtheworkprinciplethatthenumberreporttothepoliceasfollows:Thesystemofoneselfcontrolstotakeoff/hangmachineelectriccircuitemulationtotakeoffmachine,theAT89C51singleslicemachinepassesinthemeantimeprogrammableabrea

5、stconnect8255placeMT8880inordertocallmode,whetherexaminationhasalreadystiredanumbersoundornot.Ifhavealreadystiredanumbersound,thenestablishtheMT8880asabruptway,andpressthecustomerthepre-establishedtelephonenumberautomaticallystirsnumber.Finishstirtelephonenumberherea

6、fterimmediatelyexaminewhethertheotherpartytakesoffmachineornot,onceexaminingtheotherpartytotakeoffmachine,initiateaspeechhintelectriccircuittosendoutwiththeJingfeelingmutuallyconsistentspeechinformation,completeanautostirnumbertoreporttothepolice.Thepointdiscussedtoa

7、utomaticallystirtheelectriccircuitstructure,theworkprincipleandsoftwareofnumberandspeechparttodesignamethod.Keywords:MCUAutomaticallystirnumberSpeechchipThesignalsoundexamine—29—目录目录摘要IABSTRACTII前言IV1绪论IV2系统组成基础12.1选题的背景12.2主控单元及I/O扩展22.3串行EEPROM42.4语音单元及模数转换芯片ADC080

8、942.5MT8880双音多频信号发送与接收单元73系统的硬件设计123.1系统的组成和工作原理122.2DTMF双音多频信号接收与发送电路及语音电路接口133.3警情采集电路154软件设计194.1信号音的识别方法194.2软件设置204.3编程过程中应注意的