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Electronics
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Wearable and Flexible Integrated Sensors
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Wearable and Flexible Integrated Sensors

A special issue of Electronics (ISSN 2079-9292). This special issue belongs to the section "Flexible Electronics".

Deadline for manuscript submissions: closed (31 December 2021) | Viewed by 5714

Special Issue Editors

Dr. Gianluca Traversi

E-Mail Website
Guest Editor
Department of Engineering and Applied Sciences, University of Bergamo, Via Marconi 5, 24044 Dalmine (BG), Italy
Interests: low-noise front-end electronics; radiation effects in CMOS technology; CMOS active pixel sensors; voltage references and regulators; wearable monitoring systems
Special Issues, Collections and Topics in MDPI journals
Dr. Patrick Locatelli

E-Mail Website
Guest Editor
Department of Engineering and Applied Sciences, University of Bergamo, Via Marconi 5, 24044 Dalmine (BG), Italy
Interests: inertial platforms; wearable devices; body sensor networks; physical activity monitoring; signal processing

Special Issue Information

Dear Colleagues,

Wearable sensors have received tremendous attention over the past decade thanks to their employment in the Internet of Things market. Moreover, these devices can also be used for medical purposes in the healthcare field as they can closely monitor an individual’s physical activities as well as assess their health status. The majority of these systems are composed of a mixed-signal front-end circuit, microcontroller unit, communication hardware to transmit data to a remote center, and battery with its power management block and memory, all integrated and interconnected on the same printed circuit board. In such a context, one of the main hurdles to employment in long-term monitoring has been the comfort in wearing such devices, which are dependent on its dimensions and weight. Advances in materials science have enabled the development of flexible and stretchable substrates that allow fabricating comfortable and lightweight wearable tools for non-invasive, long-term wearable sensing applications. In order to be both comfortable and wearable, it is fundamental that the energy source as well as the electronics section is flexible and stretchable. Articles on flexible nanogenerators for conversion of mechanical energy into electrical energy will also be considered for publication. This call for papers is concerned with the last advances in the field of flexible substrates which allow hosting complex mixed-signal systems, textile-based sensors, and e-textile-based systems that integrate sensing capabilities into garments and flexible energy sources and harvesting systems for powering the devices. 

We solicit papers covering (but not limited to) one or more of the following topics:

  • Novel materials for flexible sensors and electronics
  • Flexible sensor and interface systems
  • Flexible and stretchable substrates and devices
  • Organic and hybrid semiconductors with printing capabilities
  • Carbon-based materials for stretchable transistors
  • Flexible and stretchable organic field-effect transistors (OFETs)
  • Graphene-based flexible electronics
  • Printed electronics and sensors
  • Flexible integrated systems for wearable biomedical sensors
  • Flexible energy suppliers
  • Flexible supercapacitors
  • Flexible harvesters

Prospective authors are invited to submit original or review contributions for publication in this Special Issue.

Prof. Gianluca Traversi
Dr. Patrick Locatelli
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. Electronics 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 2400 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

  • flexible sensors
  • flexible electronics
  • graphene
  • textile sensors
  • smart textiles
  • flexible strain sensors
  • printed sensors and electronics
  • flexible composites
  • liquid metals
  • flexible supercapacitors
  • flexible harvester

Published Papers (2 papers)

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Research

15 pages, 4978 KiB  
Article
Temperature Measurement at Curved Surfaces Using 3D Printed Planar Resistance Temperature Detectors
by Adam Steckiewicz, Kornelia Konopka, Agnieszka Choroszucho and Jacek Maciej Stankiewicz
Electronics 2021, 10(9), 1100; https://doi.org/10.3390/electronics10091100 - 7 May 2021
Cited by 5 | Viewed by 2036
Abstract
In this article, novel 3D printed sensors for temperature measurement are presented. A planar structure of the resistive element is made, utilizing paths of a conductive filament embedded in an elastic base. Both electrically conductive and flexible filaments are used simultaneously during the [...] Read more.
In this article, novel 3D printed sensors for temperature measurement are presented. A planar structure of the resistive element is made, utilizing paths of a conductive filament embedded in an elastic base. Both electrically conductive and flexible filaments are used simultaneously during the 3D printing procedure, to form a ready–to–use measuring device. Due to the achieved flexibility, the detectors may be used on curved and irregular surfaces, with no concern for their possible damage. The geometry and properties of the proposed resistance detectors are discussed, along with a printing procedure. Numerical models of considered sensors are characterized, and the calculated current distributions as well as equivalent resistances of the different structures are compared. Then, a nonlinear influence of temperature on the resistance is experimentally determined for the exemplary planar sensors. Based on these results, using first–order and hybrid linear–exponential approximations, the analytical formulae are derived. Additionally, the device to measure an average temperature from several measuring surfaces is considered. Since geometry of the sensor can be designed utilizing presented approach and printed by applying fused deposition modeling, the functional device can be customized to individual needs. Full article
(This article belongs to the Special Issue Wearable and Flexible Integrated Sensors)
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14 pages, 5319 KiB  
Article
Development of Miniaturized Wearable Wristband Type Surface EMG Measurement System for Biometric Authentication
by Siho Shin, Mingu Kang, Jaehyo Jung and Youn Tae Kim
Electronics 2021, 10(8), 923; https://doi.org/10.3390/electronics10080923 - 13 Apr 2021
Cited by 13 | Viewed by 2935
Abstract
Personal authentication systems employing biometrics are attracting increasing attention owing to their relatively high security compared to existing authentication systems. In this study, a wearable electromyogram (EMG) system that can be worn on the forearm was developed to detect EMG signals and, subsequently, [...] Read more.
Personal authentication systems employing biometrics are attracting increasing attention owing to their relatively high security compared to existing authentication systems. In this study, a wearable electromyogram (EMG) system that can be worn on the forearm was developed to detect EMG signals and, subsequently, apply them for personal authentication. In previous studies, wet electrodes were attached to the skin for measuring biosignals. Wet electrodes contain adhesives and conductive gels, leading to problems such as skin rash and signal-quality deterioration in long-term measurements. The miniaturized wearable EMG system developed in this study comprised flexible dry electrodes attached to the watch strap, enabling EMG measurements without additional electrodes. In addition, for accurately classifying and applying the measured signal to the personal authentication system, an optimal algorithm for classifying the EMG signals based on a multi-class support vector machine (SVM) model was implemented. The model using cubic SVM achieved the highest personal authentication rate of 87.1%. We confirmed the possibility of implementing a wearable authentication system by measuring the EMG signal and artificial intelligence analysis algorithm presented in this study. Full article
(This article belongs to the Special Issue Wearable and Flexible Integrated Sensors)
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