HARDWARE – SOFTWARE COMPLEX FOR AUTOMATED BIOIMPEDANCE MEASUREMENTS 

Grachev Andrey Yurievich, student, Penza State University, E-mail: nauka-fpite@mail.ru
Karpanin Oleg Valentinovich, associate professor, sub-department of nanoand microelectronics, Penza State University,
E-mail: micro@pnzgu.ru
Pecherskaya Ekaterina Anatolyevna, doctor of technical sciences, sub-department of nanoand microelectronics, Penza State University, E-mail: pea1@list.ru 

621.37, 615.47.144 

Background. Bioimpedance analysis is one of ways of diagnosing body composition. However, the possibility of its wide practical application is limited by metrological characteristics of measuring instruments. Ways to minimize tool, methodical and subjective components of bioimpedance measurement error using the developed automated hardware and software system are described.
Materials and methods. The structure of the hardware of the computer-aided complexand circuit solution of the probe current source are offered in the article. Methodological and instrumental errors of the measurement results dependfrom the implementation of its.
Results. The methodological errors of impedance measurement are minimized due to the proposed electrical equivalent model of the object in the form of RC – circuit simulation and model of measurement process in the Electronics Workbench.
Conclusions. Hardware-software complex allows to measure bioimpedance in automatic mode at frequencies from 300 Hz to 2 MHz with the basic relative error not exceeding  0,1 %. Except for the occasional error is achieved by multiple measurements
with subsequent processing of measurement results; subjective errors are excluded due to automation of measurements. 

bioimpedance, hardware-software complex, metrological analysis, current source, reducing errors