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Editorial Board Members' Collection Series: Magnetic-Responsive Smart Materials and Applications...
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Editorial Board Members' Collection Series: Magnetic-Responsive Smart Materials and Applications for Sensors and Transducers

A special issue of Sensors (ISSN 1424-8220). This special issue belongs to the section "Physical Sensors".

Deadline for manuscript submissions: 15 July 2024 | Viewed by 4929

Special Issue Editors

Prof. Dr. Seung-bok Choi

E-Mail Website
Guest Editor
Department of Mechanical Engineering, The State University of New York at Korea (SUNY Korea), 119 Songdo Moonhwa-Ro, Yeonsu-Gu, Incheon 21985, Korea
Interests: magnetorheological (MR) fluid; electrorheological (ER) fluid; polymer particles; magnetic particles; vibration control; haptic devices using MR/ER fluids; sensors and actuators using MR/ER fluids
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Evangelos Hristoforou

E-Mail Website
Guest Editor
School of Electrical and Computer Engineering, National Technical University of Athens, 15780 Athens, Greece
Interests: sensors; magnetic materials; biotechnology; structure and properties of materials; steel health monitoring
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Magnetic sensors and transducers have recently attracted interest from both academia and industry due to their increasingly exciting applications including electronic surveillance, electrical engineering, construction monitoring, automobiles, aircraft industries, medicine, informatics and magnetic recording, among others.

The development of magnetic sensors has been a human pursuit for centuries. Recent trends in magnetic sensors have included miniaturization, the improvement of features and finding new operating principles based on fundamental studies of new materials and phenomena.

This Special Issue will focus on the latest developments, research findings, and ideas around highly sensitive magnetic devices and applications, magnetic sensing technology, basic phenomena and fundamental aspects of magnetic materials suitable for magnetic sensors, actuators and applications, as well as on wireless nondestructive control and monitoring, wearable electronics and medicine involving magnetic sensors.

The topics of this Special Issue include, but are not restricted to, the following areas:

  • Novel magnetic materials for sensor and transducer applications and their advanced processing;
  • Fundamentals and physics involving basic effects, theory, and modeling of magnetic sensors;
  • Magnetic measurements and instrumentation, and measurement standards;
  • Smart materials and composites for wireless and nondestructive control including tunable metamaterials;
  • Development of magnetic sensor applications including biomedicine, electronic surveillance, electrical engineering, informatics, magnetic recording, construction monitoring, and automobile and aircraft industries, among others applications.

Prof. Dr. Seung-bok Choi
Prof. Dr. Evangelos Hristoforou
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Sensors is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • magnetic sensors
  • magnetic transducers
  • magnetic materials
  • magnetometers
  • fundamentals and physics of magnetic sensors
  • magnetic measurements and instrumentation
  • measurement standards
  • smart materials and composites
  • nondestructive control
  • tunable metamaterials
  • magnetic sensor applications

Published Papers (3 papers)

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Research

13 pages, 3206 KiB  
Article
Dependence of Magnetic Properties of As-Prepared Nanocrystalline Ni2MnGa Glass-Coated Microwires on the Geometrical Aspect Ratio
by Mohamed Salaheldeen, Valentina Zhukova, Ricardo Lopez Anton and Arcady Zhukov
Sensors 2024, 24(11), 3692; https://doi.org/10.3390/s24113692 - 6 Jun 2024
Viewed by 227
Abstract
We have prepared NiMnGa glass-coated microwires with different geometrical aspect ratios, ρ = dmetal/Dtotal (dmetal—diameter of metallic nucleus, and Dtotal—total diameter). The structure and magnetic properties are investigated in a wide range of temperatures [...] Read more.
We have prepared NiMnGa glass-coated microwires with different geometrical aspect ratios, ρ = dmetal/Dtotal (dmetal—diameter of metallic nucleus, and Dtotal—total diameter). The structure and magnetic properties are investigated in a wide range of temperatures and magnetic fields. The XRD analysis illustrates stable microstructure in the range of ρ from 0.25 to 0.60. The estimations of average grain size and crystalline phase content evidence a remarkable variation as the ρ-ratio sweeps from 0.25 to 0.60. Thus, the microwires with the lowest aspect ratio, i.e., ρ = 0.25, show the smallest average grain size and the highest crystalline phase content. This change in the microstructural properties correlates with dramatic changes in the magnetic properties. Hence, the sample with the lowest ρ-ratio exhibits an extremely high value of the coercivity, Hc, compared to the value for the sample with the largest ρ-ratio (2989 Oe and 10 Oe, respectively, i.e., almost 300 times higher). In addition, a similar trend is observed for the spontaneous exchange bias phenomena, with an exchange bias field, Hex, of 120 Oe for the sample with ρ = 0.25 compared to a Hex = 12.5 Oe for the sample with ρ = 0.60. However, the thermomagnetic curves (field-cooled—FC and field-heating—FH) show similar magnetic behavior for all the samples. Meanwhile, FC and FH curves measured at low magnetic fields show negative values for ρ = 0.25, whereas positive values are found for the other samples. The obtained results illustrate the substantial effect of the internal stresses on microstructure and magnetic properties, which leads to magnetic hardening of samples with low aspect ratio. Full article
(This article belongs to the Special Issue Editorial Board Members' Collection Series: Magnetic-Responsive Smart Materials and Applications for Sensors and Transducers)
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20 pages, 4009 KiB  
Article
A Feedback Control Sensing System of an Electrorheological Brake to Exert a Constant Pressing Force on an Object
by Tomasz Spotowski, Karol Osowski, Ireneusz Musiałek, Artur Olszak, Andrzej Kęsy, Zbigniew Kęsy and SeungBok Choi
Sensors 2023, 23(15), 6996; https://doi.org/10.3390/s23156996 - 7 Aug 2023
Cited by 2 | Viewed by 1022
Abstract
The paper presents the application of a strain gauge sensor and a viscous brake filled with an electrorheological (ER) fluid, which is a smart material with controlled rheological properties, by an electric field to the fluid domain. For experimental tests, a cylindrical viscous [...] Read more.
The paper presents the application of a strain gauge sensor and a viscous brake filled with an electrorheological (ER) fluid, which is a smart material with controlled rheological properties, by an electric field to the fluid domain. For experimental tests, a cylindrical viscous brake was designed. The tests were carried out on a test stand especially prepared for this purpose and suitable for the examination of the impact of the rotational speed of the input shaft and the value of the electric voltage supplied to the viscous brake on pressing forces, taking into account the ER fluid temperature and brake fluid filling level. On the basis of the experimental research results, a viscous brake control system to exert constant pressing forces with feedback from a strain gauge sensor, based on the programmable logic controller, was designed and implemented. This system, using its own control algorithm, ensured a control pressing force within the assumed range, both during the constant and follow-up control. The measurement results obtained during the tests of the viscous brake designed to exert a force were presented in the form of time courses, showing the changes of the pressing force, the electric voltage applied to the brake and the rotational speed of the brake input shaft. The developed ER fluid brake control system with feedback was tested for constant and follow-up control, taking into account the impact of the working fluid temperature. During the test it was possible to obtain a maximum pressing force equal to 50 N for an electric voltage limited to 2.5 kV. The resultant error was lower than 1 N, wherein the adjustment time after changing the desired value of the force was around 1.5 s. The correct operation of both the brake and the control system, as well as the compatibility of the pressing force value and time adjustment, were determined. The main technical contribution described in this article is the design of a new type of DECPF and a new method for its control with the use of a specifically programmed programmable logic controller which simulates the proportional-integral controllers’ operation. Full article
(This article belongs to the Special Issue Editorial Board Members' Collection Series: Magnetic-Responsive Smart Materials and Applications for Sensors and Transducers)
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14 pages, 4713 KiB  
Article
Contactless and Vibration-Based Damage Detection in Rectangular Cement Beams Using Magnetoelastic Ribbon Sensors
by Christos I. Tapeinos, Maria D. Kamitsou, Konstantinos G. Dassios, Dimitris Kouzoudis, Aggeliki Christogerou and Georgios Samourgkanidis
Sensors 2023, 23(12), 5453; https://doi.org/10.3390/s23125453 - 9 Jun 2023
Cited by 2 | Viewed by 2992
Abstract
This study investigated the innovative use of magnetoelastic sensors to detect the formation of single cracks in cement beams under bending vibrations. The detection method involved monitoring changes in the bending mode spectrum when a crack was introduced. The sensors, functioning as strain [...] Read more.
This study investigated the innovative use of magnetoelastic sensors to detect the formation of single cracks in cement beams under bending vibrations. The detection method involved monitoring changes in the bending mode spectrum when a crack was introduced. The sensors, functioning as strain sensors, were placed on the beams, and their signals were detected non-invasively using a nearby detection coil. The beams were simply supported, and mechanical impulse excitation was applied. The recorded spectra displayed three distinct peaks representing different bending modes. The sensitivity for crack detection was determined to be a 24% change in the sensing signal for every 1% decrease in beam volume due to the crack. Factors influencing the spectra were investigated, including pre-annealing of the sensors, which improved the detection signal. The choice of beam support material was also explored, revealing that steel yielded better results than wood. Overall, the experiments demonstrated that magnetoelastic sensors enabled the detection of small cracks and provided qualitative information about their location. Full article
(This article belongs to the Special Issue Editorial Board Members' Collection Series: Magnetic-Responsive Smart Materials and Applications for Sensors and Transducers)
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