Slavica Gajić, Platon Sovilj
In recent years, usage of electromagnetic field of static magnets in biomedical experiments is increased. It has been shown that extremely lowfrequency (ELF) magnetic fields improve the impact of oncological therapy on cancer cells. Therefore, there is a huge need for ELF magnetic fields usage in biomedical experiments. In this paper, different designs and optimizations of solenoid for electromagnetic field homogenization along its axis, as well as in experimental volume, is compared. Using metrological analysis, the best design based on achieved homogenization of electromagnetic field and...
TC4 Symposium 2022
· TC4
· 2022
· 10.21014/tc4-2022.54
· Download
Erika Pittella, Alice Bologni, Roberta Cervoni, Vincenzo Fortunato, Emanuele Piuzzi
The paper shows a comparison between a photoplethysmography wearable device and a bare pulse-oximeter based on an analog front-end for optical bio-sensing applications. In particular, a specific experimental set-up was implemented, simulating an artery, which allows to compare and acquire signals from both proposed devices on a repeatable system. Results both on the artery model and on a healthy volunteer are shown.
TC4 Symposium 2022
· TC4
· 2022
· 10.21014/tc4-2022.53
· Download
Jozef Kromka, Jan Saliga, Ondrej Kovac, Luca De Vito, Francesco Picariello, Ioan Tudosa
This paper presents a compressive sampling (CS) based measurement method for estimation of radial artery pulse wave from bio-impedance (Bio-Z) variation. The mathematical steps of the method, the 3D electrical model of the wrist used for simulations as well as the preliminary simulation investigations are presented. The reported result shows that the proposed method could be used to estimate radial artery pulse wave, which could be further used in blood pressure (BP) computation.
TC4 Symposium 2022
· TC4
· 2022
· 10.21014/tc4-2022.52
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Fapanni Tiziano, Emilio Sardini, Mauro Serpelloni
In the latest years, the need of a renewed paradigm for healthcare arose promoting the research towards the idea of remote diagnosis, care and monitoring of physiological parameters. Thus, the wearable and eskin devices arose to be embedded in the standard medical equipment. In this work, a preliminary study on flexible AJP-printed temperature sensors is reported in order to propose a novel approach to evaluate infection sites, monitor the body temperature and compensate the effects of temperature on other on-body sensors. Two different geometries are proposed, designed, produced, evaluated...
TC4 Symposium 2022
· TC4
· 2022
· 10.21014/tc4-2022.51
· Download
Claudio Nevoloso, Ciro Spataro, Rosario Miceli, Antonino Oscar Di Tommaso, Gioacchino Scaglione, Giuseppe Schettino
The international standard IEC 61800-9-2 introduces energy efficiency classification for frequency converters or complete drive module (CDM) and provides instrumentation minimum requirements for accurate measurement of CDM input and output power valid for conventional pulse-width-modulated (PWM) voltage source inverter (VSI). This paper highlights the necessary improvements to update the standard with more detailed prescriptions according to the converter topologies and the modulation techniques adopted. In this framework, this paper address the power analysis in the frequency domain of a...
TC4 Symposium 2022
· TC4
· 2022
· 10.21014/tc4-2022.50
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Daniel Belega, Dario Petri, Dominique Dallet
An iterative Interpolated Discrete Fourier Transform (IpDFT)-based frequency estimator of a sinewave affected by decaying dc offset is proposed in this paper. The accuracies of the proposed procedure and the classical IpDFT algorithm are compared with each other under different steady-state and dynamic testing conditions suggested in the IEC/IEEE 60255-118.1:2018 - Synchrophasors for power systems – Measurements. A decaying dc offset is added to the test signals suggested in the Standard and off-nominal frequency is considered. Procedure accuracy is analyzed through simulations by...
TC4 Symposium 2022
· TC4
· 2022
· 10.21014/tc4-2022.49
· Download
Arthur Silva Souza, Raimundo Carlos Silveiro Freire, Luiz Augusto M. M. Nobrega, Felipe Alexandre Da Silva Bento, George Victor Rocha Xavier, Marlo Andrade
Considering increasing the reliability of electrical systems, continuous equipment maintenance is essential, thus ensuring longevity and avoiding failures that can cause irreparable damage to the equipment. Partial discharges are physical phenomena that cause short circuits in power equipment. There are techniques that use the detection of partial discharges as a condition monitoring techniques for electrical equipment. One of these techniques is the detection of partial discharges in power transformers by means of antennas. Thus, different antennas were analyzed for different coupling to...
TC4 Symposium 2022
· TC4
· 2022
· 10.21014/tc4-2022.48
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Jakub Svatos, Jan Fischer, Jan Holub
The paper describes the Equivalent-Time Sampling (ETS) in Software-Defined Instruments (SDI) - typically oscilloscopes. It introduces a possible solution of the microcontrollers drawback caused by the maximal sampling frequency and its limitations in digitizing quick transient responses. The principle of ETS used in microcontrollers is explained, and the jitter effect is taken into account. Analog-to-digital converter input model and real properties of softwaredefined oscilloscope from ETS point of view are introduced and explained. In the system for circuit behavior analysis as a step...
TC4 Symposium 2022
· TC4
· 2022
· 10.21014/tc4-2022.47
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Sioma Baltianski
The paper presents mainly the simulation of impedance measurements utilizing a frequency response analyzer (FRA) for the study of the currentcarrying conductors under the influence of bias. It is vital to have confidence in the results of impedance spectroscopy because one of the informative quantities has very little impact on the resulting impedance. During the passage of an electric current, the studied objects have an additional low-frequency impedance called the bias-induced impedance effect (ZBI-effect) [1]. An emphasis was placed on explaining how the ZBIeffect acts as an amplifier...
TC4 Symposium 2022
· TC4
· 2022
· 10.21014/tc4-2022.46
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Krzysztof Musioł, Maciej Koszarny, Marian Kampik, Krzysztof Kubiczek, Adam Ziółek, Jolanta Jursza
Collaboration of the Polish National Metrology Institute (GUM, Warsaw) with the Silesian University of Technology (SUT, Gliwice) and joint participation in international projects focused on the development of digital sources and digital impedance bridges contributed to the development of the impedance metrology infrastructure at GUM. The article presents current work related to expanding the current infrastructure with a new 4TP, mostly thermostated impedance standards terminated with MUSA connectors. Design solutions, results of thermal stability measurements and results of the comparison...
TC4 Symposium 2022
· TC4
· 2022
· 10.21014/tc4-2022.45
· Download