基于AD8232和MLX90615的心电与体温测量系统设计_孙旭东

2014339TransducerandMicrosystemTechnologiesDOI10．13873/J．1000—9787201409—0081—04AD8232MLX90615*孙旭东1，2，张跃1，21．5180552．518055、、。、AD8232MLX90615。、、。、、。AD8232MLX90615TH776A1000—9787201409—0081—04DesignofECGandbodytemperaturemeasuringsystembasedonAD8232andMLX90615*SUNXu-dong12ZHANGYue121．DivisionofInformationScienceandTechnologyGraduateSchoolatShenzhenTsinghuaUniversityShenzhen518055China2．EmbeddedSystemandTechnologyLabGraduateSchoolatShenzhenTsinghuaUniversityShenzhen518055ChinaAbstractECGandbodytemperatureareimportantparametersthatreflecthumanhealthlong-termaccuratemonitoringECGandbodytemperatureplaysacrucialroleforpreventionanddiagnosisofdiseases．AkindofsolutiontoaportableECGandbodytemperaturemeasuringsystemisintroducedusingAD8232bio-electricitysensorandMLX90615infraredtemperaturesensortorealizemeasurementofhumanECGandbodytemperature．ECGandbodytemperaturedatawillbesenttomobilephonecomputerandotherterminalequipmentviaBluetoothafterprocessedintheprocessor．Themeasurementsystemhasadvantagesofsmallsizelowpowerconsumptionsoitiseasytocarryforlong-termmeasurementwhatismoreitslowcostandsimpleoperationmakesiteasytobepopularandpromoted．KeywordsECGacquisitionbodytemperaturemeasurementAD8232MLX90615Bluetooth0。。1。2PDA3～5。PDA、。、、、6。2014—02—25*2007FJ100418331s。。。、。3GInternet。AD8232MLX90615。1、、、、、1。1Fig1ArchitectureofECGandbodytemperaturemeasurementsystemA/DGPIOSMBus。UAＲT。。22．1电源模块设计、、3．3V3．3V。4．2VＲT91933．3V。2．2处理器模块Cortex-M3LPC1758100MHz512kB64kBSＲAMI/O2APB7。4UAＲT812A/D、4、1、70GPIOGPIO8。JTAG12MHz。2．3心电采集模块电路设计。AD8232。AD82323．3VＲLD9。AD82322。2AD8232Fig2FunctionblockdiagramofAD823223。0．5～5mVA/D。AD8232IA100OPAA14400ＲEFIN3．3V/2=1．65V。0．3Hz37Hz。AD8232A/DGPIO。2．4体温测量电路设计MLX90615—DAA。16ADCFIＲ/IIＲDSP0．02℃10。289AD8232MLX90615MLX90615PWMSMBusSMBus3。SMBus11。LPC1758SMBus2GPIOSMBusMLX90615。3SCLSMBusSDA。10k赘10k赘0.1滋F3MLX90615Fig3CircuitofMLX906152．5蓝牙电路设计BF10—A2．0UAＲTLED4。、。2k赘470k赘0.1滋F0.1滋F4Fig4CircuitofBluetoothmodule3、3。。5、、GPIO。400Hz。400Hz2．5msA/D。6。5Fig5Flowdiagramofmainprogram6Fig6FlowdiagramoftimerinterruptsubprogramSMBusMLX90615DataT=Data×0．02－273．15T。7。7Fig7Flowdiagramofexternalinterruptsubprogram44．1心电采集测试8AD82323833、。9。1。、。9876543210时间/s200202204206208210212214幅值/mV8Fig8OriginalECGwaveform9876543210时间/s幅值/mV876543210-2-19Fig9ECGwaveformaftersoftwarefiltering4．2红外体温测量测试61。1Tab1Measuringresultsofsurfacetemperatureofman’sskin12345MLX90615℃33．7133．4334．1534．7432．89℃33．933．734．635．133．4MLX90615ms。4．3系统功耗测试21#、2#、。2Tab2Testofsystempowerconsumption1#2#V3．33．3mA556055mA60mA。1600mAh24h。5AD8232MLX90615、、、、。。1．JAVAECGJ．201132118－22．2．J．20121252－54．3．PDAJ．20062622339－341．4．J．2006132172－174．5．J．20064215219－224．6．MLX90615MSP430J．2011309115－117120．7NXPSemiconductors．LPC1759_58_56_54_52_5132-bitAＲMCorte-M3MCUupto512kBflashand64kBSＲAMwithEther-netUSB2．0Host/Device/OTGCANEB/OL．2012—08—09．http∥．nxp．com/documents/data_sheet/LPC1759_58_56_54_52_51．pdf．8NXPSemiconductors．UM10360LPC17xxusermanualEB/OL．2010—08—19．http∥．nxp．com/documents/user_man-ual/UM10360．pdf．9AnalogDevicesInc．Single-LeadHeartＲateMonitorFrontEndAD8232EB/OL．2012—02—06．http∥．analog．com/stat-ic/imported-files/data_sheets/AD8232．pdf．10MelexisCorporation．MLX90615DB/OL．2010—10—12．http∥．futureelectronics．com/doc/MELEXIS/MLX90615SSG-DAA．pdf．1987－、。48