基于八电极的生物电阻抗分析检测系统设计  

Design of Electrical Impedance Analysis System Based on Eight Electrodes

作　　者：单珂 刘照阳 王芳 高天雷 赵凯 SHAN Ke 1,2 ,LIU Zhao-yang 1,2 ,WANG Fang 3,GAO Tianlei 1,2 ,ZHAO Kai 4(1.Shandong Computer Science Center（National Supercomputer Center in Jinan）;2.Shandong Provincial Key Laboratory of Computer Networks , Jinan 250000, China;3.Sinopec Pipeline Storage and Transportation Co., LTD., Weifang 261000, China;4.School of Electrical Engineering and Automation, Qilu University of Technology, Jinan 250353, China)

机构地区：[1]山东省计算中心(国家超级计算济南中心) [2]山东省计算机网络重点实验室,山东济南250000 [3]中石化管道储运有限公司潍坊输油处,山东潍坊261000 [4]齐鲁工业大学电气工程与自动化学院,山东济南250353

出　　处：《软件导刊》2018年第8期141-143,148,共4页Software Guide

基　　金：山东省科学院创新工程专项项目(2016);山东省重点研发计划项目(2015GGH309003)

摘　　要：精确采集人体生物电阻抗信号,是人体成分分析的重要基础。设计一套测量生物电阻抗系统,利用MSP430主控芯片控制恒流源产生50-300KHz激励电流信号,并通过电极施加于被测人体不同部位,采用八电极多频率阻抗采集法,通过乘法解调对生物三元模型的阻容模型进行测量。实验结果表明,应用不同频率的激励电流信号对同一人体进行测量,不同部位的阻抗值幅值以及偏移相角不同,应选取合适的频率,使测量值与理论值误差达到极小、测量系统精度达到最优。The basis of human component analysis is to accurately measure the biological electrical impedance value of human body.This article designed a set of bioelectrical impedance measurement system,using the MSP430 main control chipto control constant current source and produce 50-300 KHZ excitation current signal,and the electrode is applied on different parts of human body to be tested.Eight electrode impedance frequency acquisition method and the multiplication demodulation are employed to measure the resistance capacity model of the biological ternary model.The experimental results show that for the same measurement of bioelectrical impedance system,different exciting current frequency should be adopted to measure amplitude and phase angle,which comes closest to the measured value with the theoretical value and minimizes the error,therfore the precision of the measurement system can be achieved.

关 键 词：生物电阻抗 八电极 乘法解调 多频率测量 

分 类 号：TP319[自动化与计算机技术—计算机软件与理论]