基于蓝牙技术的便携式心电采集设备设计

题目：基于蓝牙技术的便携式心电采集设备设计1摘要现如今我国民众对生活质量的要求不断提升,对自己的身体状态和生活层次也越来越重视。世界卫生组织的研究表明：心脑血管引起的死亡在全球范围看来仍然排在首位，作为病因之首，人们不得不对其引起重视，加以防范。心电图机作为诊断心脏疾病的最直观、高效的医疗设备，它可以即时检测心脏兴奋的电位活动状况，虽然医用心电图机使用方便，且检测结果可靠，对人体一般无创伤性损害，但是一般的心电图机体积和质量都较大，且价格不菲，对于非专业用户来说操作较为复杂，每次检查都需要患者亲自前往医院，这对患者检查带来了不少的负担。本文设计了一种便于携带，基于无线蓝牙技术的能持续对病人心电信号进行检测的个人医疗硬件系统，可以不间断地对患者心脏电活动状态进行记录，还能够为临床检查和评估提供可使用的参考资料。本文主要研究了心电采集电路的设计，将心电信号采集后，通过缓冲，滤波，放大，模数转换后传输到基于ARM7内核的LPC2138处理器上，经过MCU进行数据处理后，通过蓝牙芯片发送数据。该数据能被其他主机接收并通过软件对数据进行收集并显示出波形，同时该系统采用的蓝牙无线技术还可以通过网络将心电检测资料从家庭扩展到医院、社区等，能够对医疗资源的共享起到一定作用。关键词：心电检测；蓝牙技术；ARM处理器；个人医疗2AbstractNowadays,ourpeople’sdemandofqualityoflifeisrising.Theypaymoreattentiontotheirphysicalconditionandtheleveloflife.WorldHealthOrganizationstudyshowedthat:thedeathcausedbycardiovasculardiseaseinworldwideopinionisstillinfirstplace.Peoplehavetopayattentiontoit,toguardagainst.Electrocardiogram,asthemostintuitiveandefficientdiagnosticmedicaldevice,caninstantlydetectcardiacpotentialactivitystatus.AlthoughmedicalECGmachineiseasytobeusedanditstestresultsisreliable,anditisnon-invasivedamagetohumanbody,butitssizeandqualityarelargeanditisalsoexpensive.Theoperationfornon-professionalusersistoomorecomplex.PatientsarerequiredtoexaminetheirECGatthehospital,whichbroughtalotofburden.Thispaperpresentsanindividualportablemedicalhardware,whichisbasedonwirelessBluetoothtechnology,cancontinuedetectingthepatient’sECGandrecordingtheircardiacelectricalactivity,anditcanalsoprovidereferencematerialsforclinicalexaminationandassessment.ThispaperstudiesthedesignofECGacquisitioncircuit.AftertheECGdatahasbeenacquired,withthebuffer,filter,amplifyingandanalogtodigitalconversioncircuit,thesignalwillbeconversedtodigitalandtransmittedtotheLPC2138ARM7-basedprocessor.TheMCUcanprocessthedataandsenditoutthroughtheBluetoothchip.Thisdatacanbereceivedbytheotherhostandwiththesoftware,theECGwaveformscanbedisplayed.WiththeusingofBluetoothwirelesstechnology,theECGdatacanalsobeextendedtohospitalandcommunitythroughthenetworkandtheseplayaroleinmedicalresourcessharing.Keywords:ECG,Bluetoothwirelesstechnology,ARM7-basedprocessor,individualmedicalhardware3目录摘要.................................................................................................................1Abstract...................................................................................................................2第1章绪论...........................................................................................................51.1课题的来源及研究目的和意义..................................................................51.2国内外研究现状分析..................................................................................61.2.1我国研究现状分析...............................................................................61.2.2国外研究现状分析...............................................................................71.3本章小结......................................................................................................9第2章心电信号检测原理与电路设计.............................................................102.1心电波形产生原理概述............................................................................102.2心电导联体系和发展历程介绍................................................................122.3心电信号检测电路硬件设计要求............................................................132.4心电检测电路设计....................................................................................152.4.1保护和滤波电路.................................................................................152.4.2缓冲电路.............................................................................................162.4.3心电导联差分放大电路.....................................................................172.4.4滤波放大电路.....................................................................................182.4.5右腿驱动电路.....................................................................................192.5模数转换电路设计....................................................................................202.6本章小结....................................................................................................21第3章MCU及电源电路设计...........................................................................223.1MCU电路设计...........................................................................................223.1.1LPC2138特性......................................................................................223.1.2LPC2138电路设计..............................................................................223.1.3看门狗电路设计.................................................................................233.1.4JTAG接口设计....................................................................................243.2电源模块设计............................................................................................253.2.112VDC/DC电源设计.........................................................................253.2.2+5V与+7V稳压电路..........................................................................253.2.3-5V与-7V稳压电路........................................................................