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Mixing Frequency Bio-impedance Measurement Technology based on DFT and Virtual Reference Vector

机译:基于DFT和虚拟参考矢量的混合频率生物阻抗测量技术

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摘要

In order to obtain bio-impedance information at different frequency simultaneously, the bio-impedance measurement method in the condition of mixing frequency excitation is studied in this paper. The influence of energy leakage and fence effect of DFT to sine signal detection is analyzed, according to which the bio-impedance measurement technology based on DFT with virtual reference vector is presented. Finally, compensation of virtual reference vector is certificated by emulations and experiments. From the experimental results, the dynamic reaction of respiratory and cardiac activity in different frequency can be manifested according to the human impedance measurement.
机译:为了同时获得不同频率的生物阻抗信息,本文研究了混合频率激发条件下的生物阻抗测量方法。分析了DFT对正弦信号检测的能量泄漏和围栏效应的影响,根据该检测基于DFT的基于DFT的生物阻抗测量技术。最后,通过仿真和实验证书了虚拟参考矢量的补偿。从实验结果中,根据人的阻抗测量,可以表现出不同频率呼吸和心脏活性的动态反应。

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