| Authors |
Pecherskaya Ekaterina Anatolevna, doctor of technical sciences, associate professor, head of sub-department of information and measuring equipment and metrology, Penza State University (40 Krasnaya street, Penza, Russia), E-mail: pea1@list.ru
Antipenko Vladimir Viktorovich, postgraduate student, Penza State University (40 Krasnaya street, Penza, Russia), E-mail: v.antipenko7@yandex.ru
Karpanin Oleg Valentinovich, senior lecturer, sub-department of nano-and microelectronics, Penza State University (40 Krasnaya street, Penza, Russia), E-mail: karpanino@mail.ru
Antipenko Svetlana Anatolevna, engineer, PIC «Electropribor» (69 Pobedy Avenue, Penza, Russia), E-mail: zarsveta5@gmail.com
Alexandrov Vladimir Sergeevich, student, Penza State University (40 Krasnaya street, Penza, Russia), E-mail: vsalexrus@gmail.com
Melnikov Oleg Andreevich, postgraduate student, Penza State University (40 Krasnaya street, Penza, Russia), E-mail: oleg-068@mail.ru
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| Abstract |
Background. At the present stage of the development of personalized medicine, it is urgent to create an automated system for measuring biompedance with guaranteed accuracy, high speed and the ability to process measurement results using a computer. The aim of the presented study is to improve the metrological characteristics of the developed automated system.
Materials and methods. A schematic solution of an automated method for measuring bioimpedance is presented, which makes it possible to determine the ratio of different types of tissues in the composition of the human body.
Results. It has been established that errors in measuring bioimpedance arise when recording the current flowing through a system of parallelseries resistances and capacitors, which are the equivalent of a human electrical circuit. As a result of the metrological analysis of the automated biompedance measurement system, the basic relative measurement error has been reduced to 0.1 %.
Conclusions. A model has been developed in the form of an equivalent electrical circuit, according to which the human body is a parasitic capacitor at high frequencies, in which clothing acts as a dielectric, one of the plates is the human body, and the other is the earth. The phase – frequency characteristics of this circuit are analyzed, which made it possible to improve the circuitry part of the current source in order to minimize the effect of the parasitic capacitance of the object.
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