Dynamic Mixing Frequency Impedance Measurement Method Based on DFT and Virtual Preference Vector

WANG Chao; HUANG Chun-yan; ZHANG Xiao-li; WANG Hua-xiang

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Dynamic Mixing Frequency Impedance Measurement Method Based on DFT and Virtual Preference Vector

更新时间：2025-07-16

- Dynamic Mixing Frequency Impedance Measurement Method Based on DFT and Virtual Preference Vector
- Acta Electronica Sinica Vol. 36, Issue 10, Pages: 2076-2080(2008)
- 作者机构：
  
  天津大学电气与自动化工程学院,天津,300072
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM938.84R318.03
- Published：2008
- 稿件说明：
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WANG Chao, HUANG Chun-yan, ZHANG Xiao-li, et al. Dynamic Mixing Frequency Impedance Measurement Method Based on DFT and Virtual Preference Vector[J]. Acta Electronica Sinica, 2008, 36(10): 2076-2080.
DOI：

WANG Chao, HUANG Chun-yan, ZHANG Xiao-li, et al. Dynamic Mixing Frequency Impedance Measurement Method Based on DFT and Virtual Preference Vector[J]. Acta Electronica Sinica, 2008, 36(10): 2076-2080. DOI：

摘要

为实现对生物阻抗信号在同一时刻

不同频率下的动态检测

本文对混频激励下阻抗信息的提取方法进行了研究

分析了DFT能量泄漏与栅栏效应对正弦信号测量结果的影响

提出了基于DFT和虚参考矢量的混频生物阻抗测量方法.通过仿真和实验

验证了虚参考矢量方法的补偿作用.实验表明

本方法可以通过测量不同频率下的人体阻抗

体现出呼吸、脉搏等信息在不同频率下的动态响应.

Abstract

In order to obtain bio-impedance information in 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 preference vector is presented.Finally

the compensation of virtual preference vector is certificated by the emulations and experiments.From the experimental results

the dynamic reaction of respiratory and sphygmus in different frequency can be manifested according to the human impedance measurement.

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