摘要
本文以Ｃｏｌｅ—Ｃｏｌｅ提出的阻抗轨迹图和ＲＣ三元件网络为基础，研究了人体细胞内外液分布阻抗测量仪。整个系统在微机控制下实现了全自动测量和系统校正，提高了测量精度。采用多次测量平均技术，提高了抗干扰能力和信噪比。用光耦合实现电气隔离，隔离部分用隔离式ＤＣ／ＤＣ供电，激励电流选为１００μＡ，保证了被测者的安全。
An impedance measuring Instrument to measure the intra-and extra-cellulafluid distribution of human body has been set up based on Cole-Cole locus plot and RC mod-el.The system is controlled by a mlcrocomputer to realize the full automation,and the soft-ware method is adopted for zero-compensation and calibration.To ensure safety,the opticalcouplers and DC/DC converter are used for electrical isolation,with an exciting current of100μA,far below the excltation threshold.The result shows that the Instrument is of conve-nience,high accuracy,and good repeatability.
出处
《仪器仪表学报》
EI
CAS
CSCD
北大核心
1996年第6期612-617,共6页
Chinese Journal of Scientific Instrument
