基于单片机的脉搏测量仪设计

河南理工大学毕业设计（论文）说明书摘要本文介绍的是一种基于单片机的脉搏测量仪设计，作为该系统中重要的电路模块，如心率采集电路、显示电路和STC89C52单片机之间通过串口实现连接。本次设计运用单片机STC89C52作为中心控制处理单元，通过ST188作为红外光电传感器来采集脉搏信号，经过LM358进行运放；再通过前后级滤波、放大、整形，从而得到稳定信号；实现了快速检测心率的功能。还可以通过按键来设置脉搏值的上下限范围；蜂鸣器驱动模块可以在超出所设置的范围时进行报警提示，测量结果在液晶上显示。实验表明，该设计的测试结果与实际的要求基本一致，STC89C52单片机超强的抗干扰能力和LCD1602显示屏控制比较方便的优点使这些功能能够顺利地完成。该系统的制作成本在百元以内，具有价格低廉、便于操纵、功耗小、可靠性高等优点，十分适用于家庭和个人使用。关键词：心率；红外光电传感器；STC89C52；LM358；软件河南理工大学毕业设计（论文）说明书AbstractPresentedinthispaperisadesignofpulsemeasuringinstrumentbasedonMCU,asthecircuitmoduleplaysanimportantroleinthesystem,suchasheartrateacquisitioncircuit,displaycircuitandSTC89C52microcontrollerthroughtheserialporttorealizetheconnection.ThisdesignwithSTC89C52microcontrollerasthecentralcontrolunit,throughST188asinfraredphotoelectricsensortocollectthepulsesignal,afterthelm358foropamp;againthroughbeforeandafterfiltering,magnifying,shaping,andgetstablesignal;functionstoachievetherapiddetectionofheart.Youcanalsothroughthebuttontosetthepulsevaluescope;buzzerdrivermoduleIntherangebeyondthescopeofthealarmprompt,themeasurementresultsintheliquidcrystaldisplay.Experimentalresultsshowthatthetestresultsofthedesignandpracticalrequirementsarebasicallythesame,STC89C52MCUstronganti-interferenceabilityandLCD1602displaycontroltheadvantagesofmoreconvenientsothatthesefeaturescanbesuccessfullycompleted.Theproductioncostlessthan100yuan,withlowprice,easymanipulation,lowpowerconsumption,highreliability,veryapplicabletofamiliesandindividuals.Keywords:heartrate;infraredphotoelectricsensor;STC89C52;LM358;software河南理工大学毕业设计（论文）说明书目录第1章引言.....................................................................................................................................11.1选题背景及意义.............................................................................................................11.2国内外发展现状.............................................................................................................11.3课题研究内容.................................................................................................................2第2章整体方案设计.....................................................................................................................32.1核心器件的选型...............................................................................................................32.1.1单片机的选型.....................................................................................................32.1.2传感器的选型........................................................................................................42.1.3显示模块的选型...................................................................................................52.2系统方案设计.................................................................................................................5第3章硬件系统设计.....................................................................................................................63.1单片机最小系统.............................................................................................................63.1.1电源电路...............................................................................................................73.1.2复位电路...............................................................................................................83.1.3时钟电路...............................................................................................................93.2信号变送系统.................................................................................................................93.2.1信号采集电路.....................................................................................................103.2.2滤波电路.............................................................................................................113.2.3信号放大电路.....................................................................................................123.3显示电路.......................................................................................................................133.4按键电路.......................................................................................................................153.5报警电路.......................................................................................................................163.6系统硬件电路.................................................................................................................17第4章软件系统设计.................................................................................................................184.1软件编译环境...............................................................................................................184.2STC-ISP程序下载........................................................................................................194.3程序流程图...................................................................................................................194.2.1主程序流程图.....................................................................................................194.2.2定时器中断流程图.............................