摘要
研究植入式医学传感器体内通信的人体信道传输特性。采用有限元方法建立植入式医学传感器体内通信的准静态场模型,设计实验平台验证模型的正确性,计算出模型电导率分别为各向同性和各向异性时体内电信号沿轴向和径向传输的电位增益。结果表明,植入式医学传感器的体内通信信号在准静态场频段内沿轴向衰减明显,沿径向稳定传输;信号增益受频率变化的影响较小;当电导率为各向异性时信号增益明显大于各项同性的情况;并比较了体内通信对射频通信在信号增益上的优势。
The human channel transmission characteristics of intra-body communication of implantable medical sen- sors are studied. A quasi-static field model of intra-body communication of implantable medical sensors is established using finite element method. An experiment platform was designed, which is used to verify the correctness of the mod- e]. The electrical potential gains are calculated as the intra-body electrical signal transmits along axial and radial di- rections when the model conductivity has isotropic and anisotropic characteristics, respectively. The results show that the intra-body communication signal attenuates obviously along the axial direction in the quasi-static frequency band, and the signal transmits stably along the radial direction. And the influence of frequency variation on signal gain is small; moreover, the signal gain for the anisotropic conductivity is obviously larger than that for the isotropic situa- tion. The signal gains for intra-body communication and radio communication are compared, and the signal gain for intra-body communication is superior.
出处
《仪器仪表学报》
EI
CAS
CSCD
北大核心
2012年第12期2661-2666,共6页
Chinese Journal of Scientific Instrument
基金
国家自然科学基金(51047001
61201397)
福建省自然科学基金(2011J05077)
澳门科学发展基金(014/2007/A1
063/2009/A
024/2009/A1)资助项目
关键词
植入式
传感器
体内通信
建模
增益
各向异性
implantable
sensor
intra-body communication
modeling
gain
anisotropic
