基于单片机心率计的设计

前排提示，此论文是本人毕业的时候所做论文，通过了查重与答辩，内容真实可靠，结果完美运行归档号：武汉工商学院毕业论文(设计)学院：信息工程学院专业：电子信息工程年级：学生：学号：指导教师：职称:讲师题目:基于单片机心率计的设计2016年月日I武汉工商学院本科毕业论文（设计）原创性声明本人郑重声明：所呈交的论文是本人在导师的指导下独立进行研究所取得的研究成果。除了文中特别加以标注引用的内容外，本论文不包含任何其他个人或集体已经发表或撰写的成果作品。本人完全意识到本声明的法律后果由本人承担。作者签名:年月日III目录摘要...............................................................................................................III关键词...........................................................................................................IIIABSTRACT................................................................................................IVKEYWORDS.............................................................................................IV1绪论.............................................................................................................11.1前言.....................................................................................................................11.2研究意义.............................................................................................................12方案论证以及元器件选择.........................................................................22.1传感器的选择与论证.........................................................................................22.2信号处理方案选择和论证.................................................................................22.3显示模块选择和论证.........................................................................................33硬件系统设计.............................................................................................43.1系统设计总框图.................................................................................................43.2单片机最小系统部分.........................................................................................43.3输入部分.............................................................................................................53.3.1信号采集电路........................................................................................53.3.2信号放大整形电路................................................................................63.3.3键盘电路................................................................................................73.4输出模块.............................................................................................................83.4.1LCD1602显示电路.................................................................................83.4.2蜂鸣器....................................................................................................94系统软件设计...........................................................................................104.1测量计算原理...................................................................................................104.2程序流程图.......................................................................................................104.2.1主流程图..............................................................................................104.2.2心率计数流程图...................................................................................115系统测试...................................................................................................135.1仿真...................................................................................................................135.2测试数据...........................................................................................................135.3实物效果图.......................................................................................................146总结...........................................................................................................16参考文献.......................................................................................................17IIII基于单片机心率计的设计摘要随着经济的飞速发展，人们的生活水平得到了极大的提升，但是工作压力也是越来越大，很多人生活不规律，又缺乏锻炼，所以疾病就容易找上门。近几年来，患心脑血管疾病的人越来越多，这类疾病患病率和死亡率都很高，即使应用目前最先进的治疗手段也不能保证病人完全康复。死于心脑血管疾病的人数逐年增多，因此越来越多的人开始关注健康。本设计做的就是能够方便地测量心率并实时显示的数字心率计。此次设计以单片机为核心控制单元，由红外传感器采集信号，LM358放大和整形，以及按键和电源供电作为输入部分，LCD1602液晶显示和蜂鸣器为输出部分。测量上下限可用按键调节，并使用蜂鸣器报警，传感器放置部位并不固定，只要有比较明显的脉搏信号即可，因为指尖的厚度相对人体其他组织而言薄一点，透过手指后检测到的光强比较大，所以本次设计传感器的测量部分选取指尖，每检测到一次脉搏跳动红色发光二极管就会亮一次，测量结果在液晶上显示。关键词：心率计；红外传感器；单片机STC89C51；LM358放大器IIVDesignofHeartRateMeterBasedonSingleChipMicrocomputerAbstractWiththerapiddevelopmentofsociety,people'slivingstandardshavebeengreatlyimproved,buttheworkpressureisalsogrowing,alotofpeoplearenotregularlife,andlackofexercise,sothediseaseiseasytofindthedoor.Inrecentyears,moreandmorepeoplesufferingfromcardiovascularandcerebrovasculardiseases,thediseaseprevalencerate,highdisabilityrateandhighmortality,eveniftheapplicationiscurrentlythemostadvancedandperfecttreatmentmeanscannotguaranteethepatientfullyrecovered.Thenumberofpeopledyingfromcardiovascularandcerebrovasculardiseaseseachyearisashighas15million,somoreandmorepeoplepaymoreattentiontoit.Thisdesignistobeabletoeasilymeasuretheheartrateandreal-timedisplayofdigitalheartrate.Thedesignofsingle-chipmicrocomputerasthecorecontrolunit,bytheinfraredsensorsignalacquisition,lm358amplificationandshaping,andthebutton