基于FMCW毫米波雷达远于2m生命体征实时监测系统研究

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Research on FMCW millimeter wave radar based real-time monitoring system forvital signs beyond

LIU Tao’，ZENG Wei²，WANG Chuchu²，JIANG Rong³，CHEN Yiqin，ZENG Sanyou² （1.Fire and Rescue Corps of Yangzhou，Yangzhou 225ooo， China; 2.SchoolofMechanicalEngineringandElectronicInformation，China UniversityofGeoscenes，Wuhan43o4，hina; 3.Shenzhen Kaiyangxing Information Technology Co.，Ltd.， Shenzhen 5180oo， China）

Abstract：Itisdificulttoextracttheexisting long-rangeradar-based vitalsignsignals，soanimprovedadaptiveparameter variationalmodedecomposition（IAPVMD）algorithmbasedonthetraditionalvariationalmodedecompostion（VMD）forvitalsign monitoringisproposed.Thisalgorithmaimstoextracttheweakvitalsignenergyinformationfromdistantsources.Inadition， theMUICalgorithmisutilizedforspectralpeaksearching，extractingthevitalsignsignalssuefully.Experimentalresults indicate that when the detection distance is 2m and the processing window length is 1 s，the mean absolute error （MAE） of respirationisbelow10%andtheMAEofheartrateisbelow6%overacertainperiodoftime.Furthermore，theproposed algorithmshowsbeterstabilityandhigheracuracyratewhencomparingtheestimatedvitalsignsof1Osubjectswithvarious methods.Whencomparingresultsbasedondiferentdistances，theproposed method performsbestfordataacquiredatdistances over2 m.To sumup，the validity of the proposed method has been proved.

Keywords：FMCW millimeter wave radar; vital sign monitoring; VMD; IAPVMD; mode quantity; penalty coefficien

0 引言

根据是否需要贴身佩戴检测设备，呼吸心跳的测量方法可大致分为接触式和非接触式两类。（剩余8977字）