Article
Geochemistry & Geophysics
Mohamed H. Elbadry, Josh Wetherington, Mohammed A. Zikry
Summary: A frequency-based finite element framework has been developed to predict and understand the response of an electromagnetic induction sensor to buried targets. The framework was verified with an analytical model and used to predict electromagnetic response due to interrelated stimuli and properties. It was found that the sensor was not sensitive to small variations in stand-off height and lateral positions, indicating critical distances related to the EM response of buried objects.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2022)
Article
Engineering, Electrical & Electronic
Anyu Wang, Feng Zheng, Tian Gao, Zhiqiang Wu, Xiaojian Li
Summary: This article proposes a new method to integrate the dc and ac common mode inductors by magnetic coupling, aiming to shrink the volume of EMI filters. The advantage of volume reduction using this method is illustrated through modeling and experiments.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Article
Geosciences, Multidisciplinary
Farzad Shirzaditabar, Richard J. Heck
Summary: This study tested the ability of EMI instrument Geonics EM38 in field measurements of soil magnetic susceptibility and demonstrated that this method can accurately measure magnetic susceptibility of soil profiles with good correlation to laboratory measurements. It was found that poorly drained soil profiles had lower magnetic susceptibility values compared to well-drained profiles.
Article
Geochemistry & Geophysics
Andrew J. Kerr, Waymond R. Scott, James H. McClellan
Summary: The study shows that the CRB for a target's relaxation frequency response is independent of the amplitudes of other relaxations but is affected by the proximity of relaxation frequencies. Additionally, the RMSE per relaxation frequency changes with the number of relaxation frequencies present in the target's response.
IEEE GEOSCIENCE AND REMOTE SENSING LETTERS
(2022)
Article
Engineering, Electrical & Electronic
Benjamin Maddox, Cameron Deans, Han Yao, Yuval Cohen, Ferruccio Renzoni
Summary: We introduce a new approach to electromagnetic induction imaging (EMI) by performing a 2-D optical raster scan within the vapor cell of a radio frequency atomic magnetometer (RF-AM), which overcomes the limitations of mechanical scanning. This technique allows for robust and repeatable magnetic measurements and successfully resolves conductive targets with EMI.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2023)
Article
Geochemistry & Geophysics
Andrew J. Kerr, Waymond R. Scott, James H. McClellan
Summary: In this article, we derive the Cramer-Rao lower bounds for target parameters in a specific class of targets using an EMI system. We validate the derivation through Monte Carlo simulation and propose approximate expressions for the lower bounds based on a new low-rank model perspective. These expressions simplify the analysis and improve understanding of the factors impacting the target parameters. We demonstrate the utility and accuracy of the proposed expressions through two example targets.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2022)
Article
Engineering, Electrical & Electronic
Anurag Kumar Katiyar, Alok Prakash, Satya Kesh Dubey
Summary: This article presents the design of a low-cost and hand-held device for measuring low magnetic fields over a wide frequency band. The device has shown exceptional accuracy, sensitivity, linearity, and frequency response parameters, making it suitable for applications in electromagnetic interference/electromagnetic compatibility measurements and healthcare.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2023)
Article
Chemistry, Analytical
Martial Tazifor Tchantcho, Egon Zimmermann, Johan Alexander Huisman, Markus Dick, Achim Mester, Stefan van Waasen, Giovanni Betta
Summary: The article presents a temperature drift correction method for electromagnetic induction (EMI) systems using two low-pass filters to account for delayed thermal variations. Experimental results show that this method effectively reduces the influence of temperature drift and improves measurement accuracy.
Article
Materials Science, Composites
Jianming Yang, Yujian Chen, Bo Wang, Yingguo Zhou, Xianzhi Chai, Xin Yan, Wei Han, Chen Liu, Peng Lin, Youyi Xia, Hexin Zhang, Xia Liao
Summary: In this study, electromagnetic interference (EMI) shielding composites with gradient filler distributions were fabricated using an induced magnetic field. The composite exhibited outstanding conductivity and shielding effectiveness, with high absorption rate at specific frequency. Moreover, the composite showed excellent stability and applicability.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Article
Environmental Sciences
Gian Piero Deidda, Patricia Diaz de Alba, Federica Pes, Giuseppe Rodriguez
Summary: Electromagnetic induction (EMI) techniques are widely used in geophysical surveying due to easy and fast data acquisition. The quality of sensed data greatly affects the effectiveness of data inversion. Forward modelling is crucial in optimizing the EMI survey design and a new software tool for forward EMI modelling is introduced in this paper, along with an extended inversion module.
Article
Materials Science, Composites
Jun-Ru Tao, Xiao-Hong Tang, Qian-Ming He, Ming Wang
Summary: This study discusses the effect of surface conductivity on the microwave shielding effectiveness of sandwiched MWCNT/PCL composites. It is found that decreasing surface conductivity leads to a decrease in electromagnetic shielding. Simulation and experimental studies indicate that microwave reflection plays a vital role in the shielding performance. Furthermore, the dielectric properties of the surface layers have little effect on the shielding effectiveness.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Atsuhiro Takahashi, Katsuya Nomura, Takashi Kojima, Tsuyoshi Nomura
Summary: This article uses topology optimization to design a new magnetic core structure for an EMI filter circuit, resulting in significantly improved performance. By evaluating the noise reduction effects, it was found that the EMI filter with the optimized magnetic core showed about 30 dB higher performance compared to a filter with conventional ring-shaped cores.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2021)
Article
Computer Science, Information Systems
Jang-Yeol Kim, Hyun Joon Lee, Jae-Ho Lee, Jung Hoon Oh, In-Kui Cho
Summary: This paper presents a novel approach to magnetic communication using a differential magnetic induction receiver and sensor. The proposed differential MI sensor has ultra-high sensitivity and a smaller size than conventional sensors. By increasing the signal-to-noise ratio, the sensor contributes to improving performance. The design and fabrication were based on a printed circuit board. The results of the comprehensive analysis confirmed the applicability of the proposed receiver to a magnetic field.
Article
Engineering, Electrical & Electronic
Davorin Ambrus, Marko Simic, Darko Vasic, Vedran Bilas
Summary: This article investigates a specific search coil tracking problem related to the use of EMI sensors for classifying buried low metal objects. The proposed approach utilizes a moving search coil as a magnetic field beacon, two triaxial TMR sensors as anchors, and the EKF to estimate five degrees of freedom information on the coil's relative pose.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2021)
Article
Engineering, Environmental
Gian Piero Deidda, Lorenzo De Carlo, Maria Clementina Caputo, Giorgio Cassiani
Summary: The frequency-domain electromagnetic (FDEM) methods are a powerful tool for evaluating the impact of anthropic facilities on natural environments. It allows noninvasive investigation of large areas with no impact on the system. This technique is crucial for capped landfills, as the impermeable liner limits other investigation methods. It provides the only effective solution for static imaging and time-lapse monitoring of processes in waste deposits.
Article
Archaeology
Gerben Verbrugghe, Timothy Saey, Wim De Clercq
ARCHAEOLOGICAL PROSPECTION
(2020)
Article
Geochemistry & Geophysics
Christin Bobe, Ellen Van De Vijver, Johannes Keller, Daan Hanssens, Marc Van Meirvenne, Philippe De Smedt
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2020)
Article
Anthropology
N. Karimi Moayed, D. A. G. Vandenberghe, K. Deforce, J. Bastiaens, E. Ghyselbrecht, A-E Debeer, P. De Smedt, W. De Clercq, J. De Grave
JOURNAL OF ARCHAEOLOGICAL SCIENCE
(2020)
Article
Geochemistry & Geophysics
Daan Hanssens, Willem Waegeman, Ynse Declercq, Hans Dierckx, Henri Verschelde, Philippe De Smedt
Summary: The range of near-surface applications investigating the electrical and magnetic properties of the subsurface is expanding, with increasing spatial sampling densities for terrestrial applications. Small-loop frequency-domain electromagnetic (FDEM) instruments are commonly used to record variations of multiple EM properties simultaneously, with different coil configurations producing isotropic or directional responses.
IEEE GEOSCIENCE AND REMOTE SENSING MAGAZINE
(2021)
Article
Geochemistry & Geophysics
Daan Hanssens, Ellen Van De Vijver, Willem Waegeman, Mark E. Everett, Ian Moffat, Apostolos Sarris, Philippe De Smedt
Summary: The study investigates signal drift in electromagnetic instruments by conducting static ground and elevated measurements, and using machine learning to model the relationship between drift and environmental parameters. Results show potential for mitigating drift using ML, but complete elimination is not achieved, and challenges exist in evaluating the proposed calibration method accurately.
NEAR SURFACE GEOPHYSICS
(2021)
Article
Archaeology
Philippe De Smedt, Paul Garwood, Henry Chapman, Koen Deforce, Johan De Grave, Daan Hanssens, Dimitri Vandenberghe
ARCHEOSCIENCES-REVUE D ARCHEOMETRIE
(2021)
Article
Archaeology
Ekhine Garcia-Garcia, Hana Grison, Neli Jordanova, Philippe De Smedt, Eneko Iriarte
ARCHEOSCIENCES-REVUE D ARCHEOMETRIE
(2021)
Article
Archaeology
Lena Lambers, Walter Laan, Philippe De Smedt, Burkart Ullrich, Sandra Kniess, Henning Zoellner, Rudolf Kniess, Ivo van Wijk
ARCHEOSCIENCES-REVUE D ARCHEOMETRIE
(2021)
Article
Anthropology
Philippe De Smedt, Paul Garwood, Henry Chapman, Koen Deforce, Johan De Grave, Daan Hanssens, Dimitri Vandenberghe
Summary: Geophysical soil survey, combined with targeted sampling and excavation, enables reliable identification of complex activity traces and provides significant implications for understanding Stonehenge and its landscape setting.
JOURNAL OF ARCHAEOLOGICAL SCIENCE
(2022)
Article
Geography
Gerben Verbrugghe, Veerle Van Eetvelde, Steven Vanderputten, Wim De Clercq
Article
Geography
Gerben Verbrugghe, Wim De Clercq, Veerle Van Eetvelde
JOURNAL OF HISTORICAL GEOGRAPHY
(2020)
Article
Environmental Sciences
Ynse Declercq, Roeland Samson, Ellen Van de Vijver, Johan De Grave, Filip M. G. Tack, Philippe De Smedt
SCIENCE OF THE TOTAL ENVIRONMENT
(2020)
Article
Geosciences, Multidisciplinary
Koen Deforce, Jan Bastiaens, Philippe Crombe, Ewoud Deschepper, Kristof Haneca, Pieter Laloo, Hans Van Calster, Gerben Verbrugghe, Wim De Clercq
NETHERLANDS JOURNAL OF GEOSCIENCES-GEOLOGIE EN MIJNBOUW
(2020)
Article
Geosciences, Multidisciplinary
Marieke Paepen, Daan Hanssens, Philippe De Smedt, Kristine Walraevens, Thomas Hermans
HYDROLOGY AND EARTH SYSTEM SCIENCES
(2020)