基于光电技术的心率测量仪

2011－09－151973。1a21b1.a.b.4300742.430072、。80C51F3103LED。、、。TH778A1000－0682201201－0099－03Researchonheart-ratemeasuringinstrumentbasedonphotoelectrictechnologyLUOWen1aLIUYang2XIONGJunqiao1b1a.SchoolofScienceb.SchoolofElectricalandInformationEngineeringWuhanInstituteofTechnologyWuhan430074China2.SchoolofOptoelectronicsHuazhongUniversityofScienceandTechnologyWuhan430072ChinaAbstractConsideringneedforheart-ratemeasuringdevicewithlow-costandhigh-precisionthemicrophotoelectronicmeasuringinstrumentwithdigitaldisplayisdesigned.Thisheart-ratemeterde-pendentdiodeemitsinfraredlightandthechangeofitstransmittancecanreflectthecyclicalchangeofbloodvolumeinsidefingerthenreceptiondiodereceivesthemodulatedopticalsignal.ThissignalwhichisfilteredandamplifiedisdelivereddirectlytotheMCU80C51F310tobeprocessedandthecurrentheartrateisshownbythreeLEDs.Thesystemisconvenientintuitivedisplaylowpowerconsumptionad-vantages.Keywordsheart-rateinfraredmeasure1。1。。。PIN2。2、、、MCU80C51F310、。LM3245V3。2.11。5V50mA。0.5mA15mV。2。1、·99·2012122.2RC7Hz。LM3242.5V。3。32.34。LM324。0.8～4.0V1.6～2.5V220kΩ100kΩ。2010。。5。452.4、、、LED、。6。80C51F3103.3V5V5V3.3V。LED10～20mA74HCT573LED。2.0V3.3V。4P0.4～P0.74。80C51F310P1.1。P0.1。LED。30。0。0125ms。2count0count101。00count01。1count11。count0160×1/0.025×count1/count0=14400/count00.2%。count0count1。7。·001·2012167480C51F310、。。1.J.1991114329－330.2.J.200215266－67.3.J.201102113－115.94。2。10℃/min35～50min60～90min。2.3.4、。、。3。。105℃10℃/min。90%。1.J.2001115－18.2.J.2005636－39.3.GJB1032—90.S.1991－01－26.·101·20121