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1、摘要单片机以其卓越的性能,得到广泛的应用,以深入到各个领域,已经成为一种比较成熟的技术,在医学方面更是得到了较好的应用。血压是极为重要的健康指标,血压测量的准确与否直接关系到人们的健康。现代人患心血管疾病呈低龄化趋势,所以随时关注我们的血压状况对我们百利无害。本论文讨论了以AT89C51单片机为核心的电子血压计测量原理。气泵给气囊充气后通过感器传的电压经放大、滤波得到脉搏信号,计算出收缩压、舒张压和脉搏。重点介绍了单片机及滤波电路的设计。首先依据示波法和脉搏波理论设计了血压测量系统的总体设计方案。该方案硬件电路以AT89C
2、51单片机为核心,包括信号采集处理电路,A/D转换电路,控制按钮电路和显示电路等几大部分。本文对以上几个部分的软硬件设计作了详细的阐述,介绍了核心芯片的选型,外围电路的连接,芯片与芯片之间的连接电路,程序设计方法和相应的软件程序。讨论说明了各部分电路点的工作原理,以及其软硬件的具体设计。关键词:单片机;血压;血压计;示波法;脉搏波IThedesignofportablebloodpressuremonitorAbstractSinglechipwithitssuperiorperformance,arewidelyused
3、todrillinvariousfieldshasbecomeamaturetechnology,inmedicineallthemoreyesgetabetterapplication.Bloodpressureisextremelyimportanthealthindicators;bloodpressuremeasurementaccuracyisdirectlyrelatedtopeople'shealth.Moderncardiovasculardiseasetrendsshowedyoungerage,soke
4、epaneyeonourbloodpressureBaileyusharmless.Thispaperstudiesinbloodpressuremeasurementmethodandwavemethod,onthebasisofpulsewavetheory,discusseswithAT89C51measuringprincipleofelectronicdevice.Aftertheairtoairpump,thevoltagesensorthroughenlargement,filtering,calculate
5、thepulsesignalobtainedsystolicpressure,diastolicpressureandpulse.Mainlyintroducesthedesignandtheentirecircuitchip.Firstofall,andthepulsewavebasedonoscillometricbloodpressuremeasurementsystemdesigntheorydesignproject.TheprogramhardwarewithAT89C51microcontrollerasth
6、ecore,includingsignalacquisitionandprocessingcircuit,A/Dconvertercircuit,memoryexpansioncircuits,LCDcircuits,AutomaticFillingandReleasingcircuit,mostofthekeyboardcircuitafew.Inthispaper,severalpartsoftheabovedetaileddescriptionofhardwareandsoftwaredesign,introduce
7、dtheselectionofcorechips,theexternalcircuitconnection,theconnectionbetweenthechipandthechipcircuit,programdesignmethodsandcorrespondingsoftwareprogram.Discussionillustratesthepointofallpartsofthecircuitworks,andthespecificdesignofitshardwareandsoftware.IIKeywords:
8、Single-chip;bloodpressure;Sphygmomanometer;Oscillometricmethod;pulsewaveform目录摘要........................................................................