基于RFID的考勤系统的设计与实现

315Vol．31No．520139JournalofJilinUniversityInformationScienceEditionSept．20131671-5896201305-0470-07RFID2013-03-072012A651761966—[e-mail]。130026RFIDRadioFrequencyIdentification。“”ICFM1702SL、nRF24L01FT232RL。VisualBasic。1018298813%。TM933．4ATheDesignandImplementationofAttendanceSystemUsedinClassroomBasedonRadioFrequencyIdentificationTechnologyLINGZhen-baoLIJiao-yangPIAOGuan-yuWUZi-yuCollegeofInstrumentationandElectricalEngineeringJilinUniversityChangchun130026ChinaAbstractInordertomakeupthedisadvantagethatthetraditionalattendancesystemusedinclassroomtakesuptheclasstime．Atthesametimeinordertoimprovestudents'classattendanceandeliminatetheburdenthattheteachersStatisticsstudentsusuallyscoresmanually．Wedevelopedaattendancesystemusedincampusclassroombasedonradiofrequencyidentificationtechnology．ThesystemcombinesstudentICcardwhichhasbeenpopularusedoncampus．ItusestwoalignmenttypeinfraredsensorscombinedFM1702SLwirelessRFcardreadertoGetstudents'namenumberandstatusthatstudentsoutoftheclassroomornot．ThentheinformationistransmittedtothehostcomputerthroughthenRF24L01wirelesstransmissionmoduleandtheFT232RLlevelconversioncircuit．ThehostcomputerstatisticsorganizesinformationandgeneratestudentsusualresultsthroughthesoftwareprogramwritteninVisualBasiclanguage．Itcaneliminatetheburdenofteachers．Systemtestingarrangementsfor183collegestudentscarryingtheStudentICcardoutoftheclassroomwhich101studentsfrombringinghimselfandotherstudentsICcardandcontinuousbrushcardsillegaloperationsinandoutoftheclassroomandtheremaining82studentsmakeanormalcreditcardoperation．Thetestresultsshowthat98studentsviolatetherulesamd81studentsobeytherulestherelativeerrorislessthan3%．KeywordsradiofrequencyidentificationRFIDwirelessmulti-pointtransmissionclassattendanceantiviolations0引言。。。1。、、。“”2。1测量原理1．1对射式红外传感器工作原理PIH-T12NO/NC3MDM12NPN10～30V200mA6m5ms。LED。NPN1kΩ13。。2。图1传感器模型图2传感器输出信号Fig．1SensormodeldiagramFig．2Sensoroutputsignal1．2FM1702SL读卡器工作原理FM1702SL。FM1702SLISO14443。13．56MHztypeA10cm4。“”MIFARES50IC13．56MHz。FM1702SLICLC。2V5。3。1745RFID图3读卡器的工作原理图Fig．3Readerworkingschematic2硬件设计、3。4。图4系统硬件示意图Fig．4Systemhardwarediagram2．1数据测量模块、FM1702SL、。、。2．1．1红外对管传感器。5。6。。ab图5输出信号时序图Fig．5Theoutputsignaltimingdiagram274312．1．2FM1702SL无线射频识别阅读器FM1702SLISO14443A。7。。IC。FM1702SL6。图6FM1702SL外围电路Fig．6FM1702SLperipheralcircuits2．1．3蜂鸣器电路和显示模块。12864、。2．2数据传输模块nRF24L01FT232RL。8。nRF24L01。2．4～2．5GHzISM、、9。40～50m。AT89C52710。图7多机通信原理框图Fig．7Schematicofmulti-machinecommunicationFT232RL。FT232RLTTLUSB11。FT232RL、、TXRX8。3745RFID图8FT232RL电路图Fig．8Circuitdiagram2．3上位机处理模块PC。VisualBasic12。3软件设计51CC13。VisualBasic。。01。。12。FM1702SL。。。61。914。表1考勤情况列表Tab．1AttendancelistAB1121310s410s5260。。FT232RL。10。47431图9下位机程序流程图图10主机程序流程图Fig．9LowercomputerprogramflowchartFig．10Hostprogramflowchart4系统测试图1112864液晶显示图Fig．1112864LCDdiagram183IC。101IC82。12864111512。2。表2系统测试结果及误差表Tab．2Systemtestresultsanderrortable/%82811．22101982．97图12上位机软件界面Fig．12PCsoftwareinterface。5结语、。。、。。、。5745RFID1．D．2011．WANGYong-guoYANGKui-heMENGZhi-gang．DesignandImplementationofAttendanceSystemonFingerprintIdentificationD．ShijiazhuangCollegeofInformationScienceandEngineeringHebeiUniversityofScienceandTechnology2011．2．RFIDJ．2013352-53．GONGShi-xiong．AnalysisofRFIDTechnologyandItsApplicationsJ．ChinaScienceandTechnologyInformation2013352-53．3．J．200827664-66．MAJian-fengWANGLiMAXu-fei．DevelopmentofDropletInfraredPhotoelectricAuto-DetectingCounterJ．ResearchandExplorationinLaboratory200827664-66．4．RFIDJ．20101844-50．LUShao-pingZHENGMingWUYao-hua．AttendanceSystemforClassroomwithRFIDJ．ModernElectronicsTechnique20101844-50．5QINTUAN-FA．Tree-BasedBackoffProtocolforFastRFIDTagIdentificationJ．201320237-41．ZHENGJia-liQINTUAN-FANIGuang-nan．Tree-BasedBackoffProtocolforFastRFIDTagIdentificationJ．ChinaPostandTelecommunicationsUniversityJournalsEnglishVersion201320237-41．6．M．2011．CHENGDe-fuWANGJunLINGZhen-baoetal．SensorPrincipleandApplicationM．BeijingChinaMechinePress2011．7．FM1702J．20071202-204．XINGHai-xiaSUOMing-he．BasedonFM1702RFIDReaderDesignandImplementationJ．TechnologySquare20071202-204．8．RFIDJ．2012686-87．PANShao-mingLUOGong-kunLAOYou-lan．DesignofRFIDSystemBasedonWSNJ．InstrumentTechniqueandSensor2012686-87．9．nRF24L01J．200835355-58．LIUZhi-pingZHAOGuo-liang．Short-RangeWirelessDataTransmissionBasedonnRF24L01J．AppliedScienceandTechnology200835355-58．10．CC1100J．2012305497-502．QIANCheng-huiHANXiao-huiWANGWen-yingetal．StatisticsSystemDesignonFlowofPeopleBasedonCC1100WirelessTransmissionJ．JournalofJilinUniversityInformationScienceEdition2012305497-502．11．FT232RUSB-RS232J．200871204-1206．BAOZhao-weiWANGLinXUQietal．AConverterModuleDesignaboutUSB-RS232BasedonFT232RJ．ComputerKnowledgeandTechnology200871204-1206．12．VisualBasicM．2007．SUChuan-fang．VisualBasicProgrammingM．BeijingHigherEducationPress2007．13．51CM．2009．GUOTian-xiang．51Single-ChipCLanguageTutorialM．BeijingPublishingHouseofElectronicIndustry2009．14．MiniTEDataAcquisitionRoutingforWirelessSensorNetworksJ．200916116-21．LIWen-fengWANGRu-chuanSUNLi-juan．MiniTEDataAcquisitionRoutingforWirel