摘要
人体生物电阻抗是人体体成分的重要组成部分,在一定程度上反映了人体组织的生理状况。基于此,设计了一套基于八电极的多频多段人体生物电阻抗测量系统。测量系统由单片机系统、正弦交流激励电流源、有效值检测电路等组成,实现了5～500 kHz频率范围的左右上下肢及躯干的5段测量。测试结果表明,测量系统实现了人体生物电阻抗的幅值和相位的高精度测量,幅值相对误差小于0.7%,相位绝对误差小于0.8°。
Bioelectrical impedance is an important composition of human body, and reflects the physical condi- tions of human tissues to some extent. Based on this, a multi-frequency and multi-segment bioelectrical imped- ance measurement system is designed on the principle of eight electrodes. In fact, the system, which consists of MCU system, sinusoidal excitation current source, RMS-to-DC circuit and etc, has achieved the impedance measurement of the extremities as well as the trunk under the frequency results show that the system finally realizes high-accuracy measurements impedance with the result of a relative error of magnitude which is less ranged from 5 -500 kHz. Experiment of amplitude and phase of bioelectrical than O. 7% and an absolute error of phase which is less than 0. 8°
出处
《测控技术》
CSCD
北大核心
2012年第4期122-124,129,共4页
Measurement & Control Technology
基金
国家863计划资助项目(2010AAXX)
辽宁省教育厅基金资助项目(LT2010007)
关键词
生物电
阻抗测量
多频多段
bioelectricity
impedance measurement
multi-frequency and multi-segment
