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Hofker, Tjipke (author)Superconductors expel magnetic fields, a phenomenon known as the Meissner effect. This effect makes it notoriously difficult to predict the magnetic field around a superconductor. One successful way of calculating these fields is through conformal mappings; coordinate transformations that preserve Maxwell's equations of magnetic fields in free...bachelor thesis 2024
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Joshi, Kanhai (author)Despite stringent safety standards, concrete is prone to various forms of deterioration over time, and the occurrence of cracks is not uncommon. Therefore, the detection and monitoring of deformations in concrete are essential to mitigate the risks associated with structural failure. Implementing a real-time Structural Health Monitoring (SHM)...master thesis 2023
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van den Beld, David (author)ADCS magnetometers on board of satellites suffer from the disruptive magnetic field produced by the satellite itself. For CubeSats and PocketQubes this magnetic field is usually not quantified. If the largest magnetic field sources are known and if there is freedom in the magnetometer placement, the magnetometer is simply placed as far from the...master thesis 2023
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Fetter, Marnix (author)Indoor positioning systems cannot rely on conventional localization methods, such as GPS, to locate devices because of interference with the structure of buildings. One solution is to use magnetic positioning, which is based on spatial variations in the patterns of the ambient magnetic field. To model magnetic fields, Gaussian process regression...master thesis 2023
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Chen, Y. (author), Castro Heredia, L.C. (author), Smit, J.J. (author), Ghaffarian Niasar, M. (author), Ross, Robert (author)Partial discharges (PD) detection is an effective diagnostic method to assess the insulation condition of electrical power equipment in the high-voltage laboratory or field tests. This paper presents a non-contacting PD detection method for power equipment. The method is based on an extra high-sensitivity adapted giant magneto-resistive (xMR)...journal article 2023
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Field Model Identification and Control of a Mobile Electromagnet for Remote Actuation of Soft RobotsRiccardi, A. (author), Furtado, Guilherme P. (author), Sikorski, Jakub (author), Vendittelli, Marilena (author), Misra, Sarthak (author)The actuation of miniaturized robots through external magnetic fields has great potential for medical applications. The controllability properties of the miniaturized robots are affected by magnetic field generation modality. In this work, the magnetic field of a mobile electromagnet, notably capable to generate a desired magnetic field in...journal article 2023
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Yan, Bin (author), Vogt, Sarah J. (author), Blankert, Bastiaan (author), Vrouwenvelder, J.S. (author), Johns, Michael L. (author), Fridjonsson, Einar O. (author)Early fouling warning is important for the economical operation of membrane separation systems. In parallel multi-channel flow systems, flow re-distribution between channels due to fouling is often associated with maloperation. In the current research we use low magnetic field NMR to monitor multi-fiber hollow fiber membrane modules...journal article 2023
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Baghini, Mahdieh Shojaei (author), Broekens, Kristiaan (author), Oderwald, Michiel (author), Breedveld, P. (author), Heidari, Hadi (author), Van Der Heiden, Maurits (author)Magnetostrictive strain sensors with high spinorbit coupling have been integrated with Fiber-Bragg-Grating sensors wherein the gap within the gratings varies with strain within the encapsulating magnetostrictive material. Terfenol-D has been chosen as the mm sized magnetostrictive material which exhibits the largest known bulk...conference paper 2023
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Du, Yunlu (author), Huang, Yunkai (author), Guo, Baocheng (author), Peng, Fei (author), Yao, Yu (author), Dong, J. (author)In this article, a new analytical model for predicting the magnetic field of the U-shaped interior permanent magnet motor (IPMM) is proposed. In the polar coordinates, rectangular permanent magnets are equivalent to the combination of consistent fan-shaped subdomains, and after that, the Laplace or Poisson equation of each solution domain can...journal article 2023
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Edridge, T.I. (author), Kok, M. (author)Ferromagnetic materials in indoor environments give rise to disturbances in the ambient magnetic field. Maps of these magnetic disturbances can be used for indoor localisation. A Gaussian process can be used to learn the spatially varying magnitude of the magnetic field using magnetometer measurements and information about the position of the...conference paper 2023
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Menzen, C.M. (author), Fetter, Marnix (author), Kok, M. (author)We present a mapping algorithm to compute large-scale magnetic field maps in indoor environments with approximate Gaussian process (GP) regression. Mapping the spatial variations in the ambient magnetic field can be used for 10-calization algorithms in indoor areas. To compute such a map, GP regression is a suitable tool because it provides...conference paper 2023
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Luo, T. (author), Ghaffarian Niasar, M. (author), Vaessen, P.T.M. (author)In this article, an approach combining semi-empirical equations and the method of images is proposed for round conductor layer windings with un-gapped core. The new equation for proximity effect can convert the constant field strength from the magneto-motive force (MMF) across the core window into a frequency-dependent uniform background...journal article 2023
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Veen, Thijs (author)Indoor localisation is a growing field of interest in recent studies. While GPS (global positioning system) is a standard for outdoor localisation, no such solution exists for indoor applications. The literature provides several methods to obtain the location of indoor systems, often using optical sensors. A small number of recent studies use...master thesis 2022
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Feldstein Bofill, David (author)Resonators are useful structures due to their simplicity in modeling, design, fabrication and measurement. They can be measured over a wide range of frequencies, power and temperatures, making them convenient for many experiments. Recently, superconducting resonators started being used to investigate microscopic phenomena which require applied...master thesis 2022
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Manafu, Marius (author)The technology of focus in this paper, the applied-field magnetoplasmadynamic (MPD) thruster (AF-MPDT), was developed in the 1960s. However, little research has been conducted for this thruster. There is still the need for an accurate model describing the thruster's functioning, its thrust and the physical phenomenons inside.<br/>This project...master thesis 2022
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Boele, Jelle (author)This thesis describes the design of a CMOS magnetic field sensor system for measuring electronic currents. A hybrid system, using Hall plates and a pick-up loop is chosen to obtain improved performance compared to conventional Hall based magnetic field sensors. The pick up loop enables to reduce the current consumption and increases the...master thesis 2022
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Viset, F.M. (author), Helmons, R.L.J. (author), Kok, M. (author)We present a computationally efficient algorithm for using variations in the ambient magnetic field to compensate for position drift in integrated odometry measurements (dead-reckoning estimates) through simultaneous localization and mapping (SLAM). When the magnetic field map is represented with a reduced-rank Gaussian process (GP) using...journal article 2022
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Farinacci, L.S.M. (author), Veldman, L.M. (author), Willke, Philip (author), Otte, A. F. (author)Historically, electron spin resonance (ESR) has provided excellent insight into the electronic, magnetic, and chemical structure of samples hosting spin centers. In particular, the hyperfine interaction between the electron and the nuclear spins yields valuable structural information about these centers. In recent years, the combination of...journal article 2022
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Kok, M. (author), Viset, F.M. (author), Osman, M.E.A. (author)In this work, our focus is on indoor localization using the indoor magnetic field as a source of position information. This relies on the fact that ferromagnetic materials inside buildings cause the magnetic field to vary spatially. We jointly estimate the pose of a combined sensor module (containing a magnetometer) as well as the magnetic field...conference paper 2022
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Osman, M.E.A. (author), Viset, F.M. (author), Kok, M. (author)In this paper, a simultaneous localization and mapping algorithm for tracking the motion of a pedestrian with a foot-mounted inertial measurement unit is proposed. The algorithm uses two maps, namely, a motion map and a magnetic field map. The motion map captures typical motion patterns of pedestrians in buildings that are constrained by e.g....conference paper 2022