摘要心率测量仪在我们的日常生活中已经得到了非常广泛的应用,通过观测心率信号，可以对人体的健康进行检查，通常被用于保健中心和医院。为了提高心率测量仪的简便性和精确度，本课题设计了一种基于51单片机的心率测量仪。系统以STC89C52单片机为核心，以光电传感器利用单片机系统内部定时器来计算时间，由光电传感器感应产生信号，单片机通过对信号累加得到心脏跳动的次数，时间由定时器定时而得。系统运行中可以通过观察指示灯闪烁，若均匀闪烁说明测量值准确。系统停止运行时，能够显示总的脉搏次数和时间。经测试，系统工作正常，达到设计要求。本设计利用红外光电传感器产生脉冲信号，经过放大整形后，输入单片机内进行相应的控制，从而测量出一分钟内的心脏跳动的次数，快捷方便。系统可以供用户测量当时的心脏跳动的次数，同时还可以设定上限次数和下限次数，当测量的范围超过设定的范围则驱动蜂鸣器报警提醒，除此外用户还可以设定每天闹钟提醒测量，时间可以自行设定，结果最终可以把采集到的心率信号显示在数码管上。关键词：STC89C52；光电传感器；数码管；心率测量仪AbstractHeartratemeterhasbeenwidelyusedinourdailylife.Byobservingtheheartratesignal,wecancheckthehealthofhumanbody.Itisusuallyusedinhealthcentersandhospitals.Inordertoimprovethesimplicityandaccuracyofheartratemeasuringinstrument,aheartratemeasuringinstrumentbasedon51singlechipcomputerisdesignedinthispaper.ThesystemisbasedonSTC89C52singlechipcomputer.Thephotoelectricsensorcalculatesthetimebyusingthetimerinsidethesinglechipcomputersystem.Thesignalisinducedbythephotoelectricsensor.Thenumberofbeatingheartsisobtainedbyaddingupthesignals.Thetimeisdeterminedbythetimer.Intheoperationofthesystem,theindicatorcanbeobservedtoflicker.Iftheuniformflickerindicatesthatthemeasuredvalueisaccurate.Whenthesystemstopsrunning,itcandisplaythetotalpulsenumberandtime.Aftertesting,thesystemworksnormallyandmeetsthedesignrequirements.Thisdesignusesinfraredphotoelectricsensortogeneratepulsesignal.Afteramplificationandshaping,thepulsesignalisinputintotheMCUforcorrespondingcontrol,soastomeasurethenumberofheartbeatinginoneminute,whichisfastandconvenient.Thesystemcanbeusedtomeasurethenumberofheartbeatsatthattime,atthesametime,theupperandlowerlimitscanbeset.Whentherangeofmeasurementexceedsthesetrange,thebuzzercandrivethealarmreminder.Inaddition,theusercansetthealarmclocktoremindthemeasurementeveryday.Thetimecanbesetbyhimself.Theresultcanfinallydisplaythecollectedheartratesignalonthedigitaltube.Keywords:STC89C52;PhotoelectricSensor;Digitaltube;InstantHeartRate目录.......................................................................................................................................5...........................................................................................................................5...................................................................................................................5...................................................................................................................6...........................................................................................6...........................................................................................................6...........................................................................................................6....................................................................................6..................................................................................6...
