便携式心率监测仪的设计

AI目录绪论......................................................................................................................................11系统统方案设计..............................................................................................................21.1系统功能要求........................................................................................................21.2医学常识................................................................................................................21.3系统方框图............................................................................................................32系统硬件设计..................................................................................................................52.1单片机介绍............................................................................................................52.1.1AT89C2051主要性能..................................................................................52.1.2AT89C2051的引脚说明..............................................................................62.2传感器与信号处理电路的设计............................................................................72.2.1光电式脉搏波传感器..................................................................................72.2.2前置放大与滤波电路..................................................................................82.3显示电路..............................................................................................................102.3.1ULN2003的功能.......................................................................................102.3.3显示电路接口设计....................................................................................102.4报警电路.......................................................................................................112.5时钟和复位电路设计...........................................................................................112.5.1时钟电路设计............................................................................................112.5.2复位电路的设计........................................................................................123软件设计........................................................................................................................133.1中端程序流程图..................................................................................................133.1.1定时器中断程序流程图............................................................................133.1.2INT中断程序流程图.................................................................................143.2显示程序流程图..................................................................................................154调试与仿真....................................................................................................................164.1仿真软件..............................................................................................................16II4.2调试仿真中注意的问题......................................................................................16结论....................................................................................................................................17参考文献............................................................................................................................18附录A心率监测仪电气原理图....................................................................................19附录B部分源程序..........................................................................................................20致谢..................................................................................................................................25III便携式人体心率监测仪的设计摘要多年来，心率监测仪在心血管疾病的研究和诊断方面发挥出显著的作用，它们所记录的心脏活动时的生物电信号，已成为临床诊断的重要依据。目前，检测心率的仪器虽然很多，但是能像本文设计的系统一样实现精确测量、便于携带、报警等多种功能的便携式全数字心率测量装置却不多。本系统以AT89C2051单片机为核心控制芯片，光电式脉搏波传感器采集信号，以七段数码管作为显示系统，经信号处理电路后脉冲送入单片机，由数码管显示心率。本文设计的人体心率监测仪使用方便，只需将手指端轻轻放在传感器上，即可实时显示出每分钟脉搏次数，特别适合体育训练和外出旅游等场合使用。采用红外光学检测法，能够在运动的状态下进行心率测量。该系统运行稳定，实时性强，安全可靠，系统通用性好，移植、扩展方便，同时具有功耗低，体积小，操作简单，便于随身携带等特点，适合家庭和社区医疗保健使用，对心血管疾病的早期诊断具有重要的意义。【关键词】：心率监测单片机数码显示IVTheDesignofPortableHeartRateMonitorAbstractFormanyyears,theheartratemonitorhasplayedasignificantroleinresearchanddiagnosesofcardiovasculardiseases.Biologicalsignalsofcardiacactivityrecordedbytheheartratemonitorhavebecomeimportantbasisofclinicaldiagnosis.Atpresent,therearealotofinstrumentsofdetectingheartrate,butthereisalittleportabledigitalheartbeatmeasurementdevicethesameasthesysteminthispaperwithvariousfunctionssuchasaccuratemeasurement,easytocarryandalarm.ThesystemadoptsAT89S52051microcontrollerascorecontrolchip,photoelectricpulsewavesensorfordataacquisition,seven-segmentdigitaltubesasthedisplaysystem.Throughsignalprocessingcircuitry,thepulseisdirectedtothemicrocontroller,displayingheartratebydigitaltubes.Thehumanheartratemonitordesignedinthispaperiseasytouse,justlightlyputtingafingeronthesensorsidewhichcandisplayreal-timepulserateperminute,especiallyforsportstrainingandtravelandsoon.Themethodofinfraredopticaldetectionisabletomeasuretheheartrateinmotionstate.Thesystemisstable,