基于DFT和虚拟参考矢量的混频生物阻抗测量技术

Proceedings of the ... International Conference on Biomedical Engineering and Informatics. International Conference on Biomedical Engineering and Informatics Pub Date : 2008-05-27 DOI:10.1109/BMEI.2008.126

Wang Chao, H. Chunyan, Zhang Xiao-li, Wang Huaxiang

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引用次数: 6

摘要

为了同时获得不同频率下的生物阻抗信息，本文研究了混频激励条件下的生物阻抗测量方法。分析了能量泄漏和DFT的栅栏效应对正弦信号检测的影响，在此基础上提出了基于虚拟参考矢量DFT的生物阻抗测量技术。最后，通过仿真和实验验证了虚拟参考矢量的补偿效果。从实验结果来看，根据人体阻抗测量可以表现出呼吸和心脏活动在不同频率下的动态反应。

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

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.

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Proceedings of the ... International Conference on Biomedical Engineering and Informatics. International Conference on Biomedical Engineering and Informatics

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