| 高秀娥,唐佳,陈波.多频多段人体生物电阻抗测量系统[J].测控技术,2012,31(04):122-124 |
| 多频多段人体生物电阻抗测量系统 |
| A Bioelectrical Impedance Measurement System Based on Multi-Frequency and Multi-Segment Technology |
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| DOI： |
| 中文关键词: 生物电 阻抗测量 多频多段 |
| 英文关键词:bioelectricity impedance measurement multi-frequency and multi-segment |
| 基金项目:国家863计划资助项目(2010AAXX)；辽宁省教育厅基金资助项目(LT2010007) |
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| 中文摘要: |
| 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°。 |
| 英文摘要: |
| Bioelectrical impedance is an important composition of human body,and reflects the physical conditions of human tissues to some extent.Based on this,a multi-frequency and multi-segment bioelectrical impedance 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 ranged from 5~500 kHz.Experiment results show that the system finally realizes high-accuracy measurements of amplitude and phase of bioelectrical impedance with the result of a relative error of magnitude which is less than 0.7% and an absolute error of phase which is less than 0.8°. |
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