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1、电子测量与仪器学报JOURNALOFELECTRONICMEASUREMENTANDINSTRUMENT第27卷第1期2013年1月Vol.27No.1·21·DOI:10.3724/SP.J.1187.2013.00021肌肉电导率对人体通信信号传输的影响*曾雪芝1,2高跃明1,2潘少恒2,3麦炳源2,3韦孟宇2,3民1,2杜(1.福州大学物理与信息工程学院福州350108;2.福建省医疗器械和医药技术重点实验室福州350002;3.澳门大学科技学院电机及电脑工程系澳门特别行政区999078)摘要:肌肉组织具有良好的电导率且占据人体较大体积,研究肌肉电导率在人
2、体通信中的作用,有助于掌握电流耦合信号传输特性,提高人体建模的准确性。采用有限元法建立电流耦合信号在肢体传输的准静态场模型,研究不同频率下肌肉电导率的变化引起各组织层总电流密度分布的变化,重点分析肌肉各向异性电导率对耦合电流信号传输的影响,最后通过实验测量验证有限元模型。结果表明,超过64%的电流信号流经肌肉层,并且肌肉电导率越大流经肌肉层的电流越多;在1kHz~1MHz范围内,肌肉各向异性电导率对人体信号传输有较大影响;考虑肌肉电导率各向异性的模型更接近人体实验结果。关键词:肌肉电导率;各向异性;人体实体中图分类号:TN919文献标识码:A国家标准学科分类代码
3、:510.50Effectsofmuscleconductivityonsignaltransmissionofintra-bodycommunicationsZengXuezhi1,2GaoYueming1,2PanShaoheng2,3MaiBingyuan2,3WeiMengyu2,3DuMin1,2(1.CollegeofPhysicsandTelecommunicationEngineering,FuzhouUniversity,Fuzhou350108,China;2.KeyLaboratoryofMedi-calInstrumentationand
4、PharmaceuticalTechnologyofFujianProvince,Fuzhou350002,China;3.DepartmentofElectricalandComputerEngineering,FacultyofScienceandTechnology,UniversityofMacau,MacaoSAR999078,China)Abstract:Themuscleoccupiesthelargevolumeofthehumanbodyandhasgoodelectricalconductivity.Theresearchoneffectof
5、muscleconductivityinintra-bodycommunicationcanhelpforanalyzingthetransmissioncharacteristicsofcur-rentcouplingsignal,aswellasimprovingtheaccuracyofmodel.Thequasi-staticmodelbasedonthefiniteelementmethod(FEM)wasestablishedandanalyzed,forcurrentcouplingsignaltransmissionthroughthelimb.
6、Thevariationoftotalcurrentdensitydistributionresultedfromthemuscleconductivityatdifferentfrequencywasstudied.Thentheeffectsofmuscleanisotropicconductivitywereemphaticallyanalyzed.Finally,theFEMmodelwasverifiedbyexperimentalmeasurements.Theresultsshowedthatmorethan64%ofthecurrentsigna
7、ltransmittedthroughthemusclelayer.Andthelargermuscleconductivity,themorecurrentpropagatesthroughthemuscle.In1kHz~1MHz,theanisotropicconductiv-ityofmusclehasagreateffectonsignaltransmissionofintra-bodycommunications.What’smore,themodelwithmus-cleanisotropicconductivityclosertorealhuma
8、nbody.Keywor