多导联在线阻抗检测的实现与分析  

Implementation and Analysis of Multi-lead Online Bioimpedance Measurement

作　　者：卫毅[1,2] 郭建平[1] 姚宇华[1] 殷学民[1] 张喆[1] 陈浩[1] 

机构地区：[1]中国科学技术大学电子工程与信息科学系,安徽合肥230072 [2]中国航天员科研训练中心,北京100094

出　　处：《现代生物医学进展》2013年第1期135-140,共6页Progress in Modern Biomedicine

基　　金：航天医学基础与应用国家重点实验室项目(SMFA09A16);中国航天医学工程预先研究项目(2011SY5407019;2012SY54B0601)

摘　　要：目的:提出了一种基于多导联生理信号采集装置平台的快速、稳定、低功耗的在线阻抗测量方法。方法:在线阻抗测量的实现主要有两个关键技术:正弦信号恒流源和数字带通滤波器,都主要是采用软件的方式实现的。结果:单极性和双极性两种模式四组测量阻值的变异系数均不超过10%,测量值的稳定性较高,可以通过多次测量求平均值的办法来修正测量误差,修正后的误差明显优于修正之前的误差。结论:由单极性和双极性两种模式实际阻抗测量值可知,测量值能够准确反映电极与人体表皮的接触情况,此种方法稳定可靠。Objective： To propose a rapid, stabile and low-power method of online bioimpedance measurement based on multi-lead physical signal collection instrument. Methods： The two key techniques of online bioimpedance measurement such as sine wave constant-current source and digital bandpass filt^r are realized using software. Results： Coefficient of variation of unipolar and bipolar two modes of four groups of the measured bioimpedance does not exceed 10%, the measured values is the measurement error is fixed by repeatedly measuring average way, as the amended error＂ is significantly better than the error before the correction. Conclusion： The actual impedance measurement shows that two modes of unipolar and bipolar measurements accurately reflect the electrode and the skin contact, this method is stable and reliable.

关 键 词：软件 多导联 阻抗测量 

分 类 号：Q-33[生物学] TH79[机械工程—仪器科学与技术]