Platon Sovilj, Dragan Pejić, Marjan Urekar, Sanja Mandić
Digital stochastic measurement methods were developed in the past, with the focus onto “measurement over interval” strategy and use of stochastic dither signals. These methods obtained the increase of effective precision from low-precission A/D converters. Combination of simple analog hardware and state-of-art digital modules makes these methods suitable in many applications.Development of 4th industrial revolution (often named as Industry 4.0 concept) is extensivelly based on communication technologies advancement. This advancement enhanced microprocessor and integrated circuits based...
TC4 Symposium 2023
· TC4
· 2023
· 10.21014/tc4-2023.35
· Download
Platon Sovilj, Sanja Mandić, Dragan Pejić, Đorđe Novaković, Marjan Urekar
The threat of climate change and the global challenges in the energy sectors, led the countries all over the world to consider investing in low-carbon energy projects. Hence, renewable energy technologies, storage technologies, smart electric energy grids, energy efficiency aspects and other similar issues, are some of the main aspects which can lead into the direction of large-scale decarburization. The Knowledge Triangle (KT) methodology points out the significance of jointly organized research, education and innovation processes, and importance of the linkages between these processes. The...
TC4 Symposium 2023
· TC4
· 2023
· 10.21014/tc4-2023.34
· Download
Sanja Mandić, Dragan Pejić, Đorđe Novaković, Marjan Urekar, Platon Sovilj
In this article, the methods of measuring the relative phase difference between two simple periodic signals, based on timer modules, are considered, with an analysis of a measurement system, its following problems, and proposed solutions. The basic motivation for this research is the necessity for a very precise and accurate measurement of the relative phase difference between the voltage signal and current signal of a two-channel source, when there is a degradation of the phase in the output stage of a twochannel source. To compensate for the deviation of the measured and real phase angle...
TC4 Symposium 2023
· TC4
· 2023
· 10.21014/tc4-2023.33
· Download
Jozef Kromka, Levente Fekete, Jan Saliga
Over the years, numerous web-based remote laboratories have been developed, providing a practical solution for offering hands-on training and education in various scientific fields, especially in online settings. This article outlines the initial design of a LabVIEWbased remote laboratory with a web interface created using a novel technology, National Instruments' (NI) G Web Development Software. In addition, a reservation system was implemented to manage access to the remote laboratory's web interface, allowing access only at specific times.
TC4 Symposium 2023
· TC4
· 2023
· 10.21014/tc4-2023.32
· Download
Antonia Juskova, Ondrej Kovac
In this paper, the technology and design of a driving assistant called the Surround View Monitor (SVM) are discussed. The procedures used to create a unified, bird's-eye view are presented, which involve stitching images captured by strategically placed cameras on the vehicle. The proposed algorithm was successfully implemented on a car model and involves various stages, including camera calibration, photometric and perspective correction, scale planar transformation, and final image stitching. The paper should be considered student work and it is positioned as the foundation for the...
TC4 Symposium 2023
· TC4
· 2023
· 10.21014/tc4-2023.31
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Radivoje S. Popovic, Dragana Popovic Renella, Sasa Dimitrijevic, Bojan Milenkovic, Sasa Spasic
This paper introduces a novel magnetic sensor IC for current sensing applications. The magnetic sensing function is based on the combination of the Hall effect devices for DC and low frequency fields, and an inductive coil for high frequency fields. The sensor IC incorporates a horizontal Hall device and a planar coil for the magnetic field perpendicular to the chip surface; and a vertical Hall device that can be combined with an external coil for the magnetic field parallel to the chip surface. The integrated signal processing electronics contains innovative circuits based on the switched...
TC4 Symposium 2023
· TC4
· 2023
· 10.21014/tc4-2023.30
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Daniel Belega, Gabriel Găspăresc
In this paper the accuracy of the power system frequency measurement achieved by means of two commonly used electronic instruments, which are a universal counter and a bench top digital multimeter, are investigated under steady-state conditions in the case of synthetized and real-life power system signals. Moreover, the accuracy of the Rate-Of-Change Of Frequency (ROCOF) estimates achieved by means of the frequency measurements is analyzed. The results obtained by both instruments are compared with each other. In addition, from the achieved measurements some remarks are drawn.
TC4 Symposium 2023
· TC4
· 2023
· 10.21014/tc4-2023.29
· Download
Andreas Blug, Kerstin Thiemann, Simon Philipp, Thomas Straub, Alexander Bertz
Microfabricated optically pumped magnetometers (OPM) are a novel class of commercially available quantum magnetometers combining high sensitivity with high dynamic range. In non-destructive testing (NDT) this should enable new applications like measuring stray fields arising from small stress concentrations affecting local magnetization. In ferromagnetic steel the sensitivity of OPM is sufficient to measure magnetization from critical stresses for crack initiation in submillimeter volumes. However, OPM, as they are built today, require additional components like magnetic flux guides to...
TC4 Symposium 2023
· TC4
· 2023
· 10.21014/tc4-2023.28
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Paolo Durandetto, Bruno Trinchera, Danilo Serazio, Emanuele Enrico
A 10 V DC quantum voltage calibration system, based on a programmable Josephson voltage standard (PJVS) operating in liquid helium, has been recently set-up and tested at INRiM. The PJVS system is partly-commercial and is based on a 10 V superconductor-normal metal-superconductor (SNS) array of 69631 Josephson junctions operated on the first Shapiro steps. The goal is to establish a new highreliability quantum voltage standard for the DC calibration of solid-state voltage sources and digital voltmeters (DVMs). The paper reports the PJVS system description and first experimental testings and...
TC4 Symposium 2023
· TC4
· 2023
· 10.21014/tc4-2023.27
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A. Stuck, M. Mijalkovic, M.Vidojevic, D. Popovic
The fundamental factors that limit the accuracy of magnetic measurements for field strengths typically encountered in industrial measurements of permanent magnets are discussed. In regions where magnetic fields can be considered homogenous, the accuracy of the measurement is limited by the stability of the magnetometer, the accuracy of its calibration, and the orthogonality of the sensor. However, the fieldsensitive volume's size and the measurement axis’s orthogonality determine the total accuracy in the nearfield region of small magnetic structures. Using measured magnetic images from...
TC4 Symposium 2023
· TC4
· 2023
· 10.21014/tc4-2023.26
· Download