PAGE\*MERGEFORMATI数字式心]率计设计摘要在社会飞速发展的今天，人们的物质文化生活得到了极大的提高，但同时多种疾病威胁着人们的生命；而心脏病的发作又是人们难以预防的突发致命疾病，所以健康也被越来越多的人所重视。本设计要解决的问题就是可以测量心率、预防心脏病等心脏方面疾病的数字心率计。本设计采用以AT89S52单片机为核心的低成本、高精度、微型化数字显示心率计的硬件电路和软件设计方法。整个电路采用模块化设计，由主程序、预置子程序、信号采集子程序、信号放大处理子程序、显示子程序等模块组成。各探头的信号经单片机综合分析处理，实现心率测量的各种功能。在此基础上设计了系统的总体方案，最后通过硬件和软件实现了各个功能模块。相关部分附有硬件电路图、程序流程图。该心率计的原理是用红外光电传感器OPT101接收到人体信号，因人体信号很微弱，所以在电路中设置了双重放大电路（主要芯片：OP07、LM324N）。该信号经放大整形处理后传给A/D转换器实现模拟信号转为数字信号，经过以上处理后，再传给单片机AT89S52计算，计算完后由四位数码管显示出来。该心率计可以简单的测量出人的心跳和人体体温，基本实现了预定的目标，这将大大减少病人测量心跳和体温的时间。关键字：心率；测量；单片机AT89S52；转换器ⅡDigitalheartratemeterdesignAbstractTodayintherapiddevelopmentofsociety,people'smaterialandculturallifehasbeengreatlyimproved,butalsoavarietyofdiseasesthreateningpeople'slives;andheartattackisitdifficulttopreventsuddenfataldisease,sohealthisalsovaluedbymoreandmorepeople.Thedesignproblemtobesolvedisthatyoucanmeasureheartrate,cardiacdisease,heartdiseaseandotherdigitalheartratemeter.ThisdesignusestoAT89S52microcontrollercore,low-cost,highaccuracy,digitaldisplayofheartratemeterminiaturizationofhardwareandsoftwaredesign.Theprobebythesinglechipintegratedanalysisofsignalprocessingfunctionstoachieveheartratemeasurement.Onthisbasis,theoveralldesignofthesystemprogram,andfinallyachievedthroughvarioushardwareandsoftwaremodules.Withtherelevantpartsofthehardwarecircuit,theprogramflowchart.TheprincipleoftheheartratemeterisusedtoreceiveinfraredphotoelectricsensorOPT101tohumansignals,thesignalisveryweakbecauseofthehumanbody,sothecircuitissetinthedualamplifier(mainchip:OP07,LM324N).ThesignalpassedthroughenlargedplastictreatedA/Dconverterforanalogsignalsintodigitalsignals,withtheabovetreatment,andthenpassedtomicrocontrollerAT89S52calculated,finishedupbyfourdigitaldisplaydsheartrate,Theheartratemetercaneasilymeasuretheperson'sheartrateandbodytemperature,essentiallyachievingitsstatedgoals,whichwillgreatlyreducethepatientsofheartrateandbodytemperatureofthetime.Keywords:heartrate；measurement；microcontrollerAT89S52；co