A belt-integrated piezoelectric energy harvester for wearable electronic devices

Due to the self-supplied energy requirements of wearable electronic devices, flexible piezoelectric energy harvesters (FPEHs) that can convert waste vibration energy in the environment into electrical energy have received widespread...

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Experimental evaluation of Tusi couple based energy harvester for scavenging power from human motion

MATEC Web of Conferences ◽

10.1051/matecconf/201821105004 ◽

2018 ◽

Vol 211 ◽

pp. 05004

Author(s):

Jan Smilek ◽

Zdenek Hadas

Keyword(s):

Output Power ◽

Energy Harvester ◽

Electronic Devices ◽

Low Frequency ◽

Human Motion ◽

Single Measurement ◽

Average Output ◽

Wearable Electronic ◽

Wearable Electronic Devices ◽

Inertial Energy

This paper deals with the experimental performance evaluation of the prototype of a novel inertial energy harvester based on Tusi couple mechanism. The harvester was developed as an autonomous power source for environments with very low frequency and magnitude of mechanical vibrations available. The experiments were conducted using human body during different activities as a source of mechanical excitation, with the prospect of using the harvester for powering up future wearable electronic devices. Four different locations on a single measurement specimen were picked for the harvester placement - back of the head, belt, wrist and ankle. Measurements in each location comprised of walking on a straight and level path at natural speed, walking up and down the stairs, jumping, running, and location-specific activities that were expected to provide significant output power. The measured average output power of the device with dimensions 50x50x20 mm on empirically selected 2 kΩ electrical load reached up to 6.5 mW, obtained with the device attached to the ankle while shaking the leg.

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Characteristics of Discharge Currents Measured through Body-Attached Metal for Modeling ESD from Wearable Electronic Devices

IEICE Transactions on Communications ◽

10.1587/transcom.2015ebp3184 ◽

2016 ◽

Vol E99.B (1) ◽

pp. 186-191 ◽

Cited By ~ 2

Author(s):

Takeshi ISHIDA ◽

Fengchao XIAO ◽

Yoshio KAMI ◽

Osamu FUJIWARA ◽

Shuichi NITTA

Keyword(s):

Electronic Devices ◽

Wearable Electronic ◽

Wearable Electronic Devices

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Recent Progress of Fluxgate Magnetic Sensors: Basic Research and Application

Sensors ◽

10.3390/s21041500 ◽

2021 ◽

Vol 21 (4) ◽

pp. 1500

Author(s):

Songrui Wei ◽

Xiaoqi Liao ◽

Han Zhang ◽

Jianhua Pang ◽

Yan Zhou

Keyword(s):

Recent Progress ◽

Electronic Devices ◽

Basic Research ◽

Research Direction ◽

Magnetic Sensor ◽

Magnetic Sensors ◽

Future Research ◽

Calibration Methods ◽

Wearable Electronic ◽

Wearable Electronic Devices

Fluxgate magnetic sensors are especially important in detecting weak magnetic fields. The mechanism of a fluxgate magnetic sensor is based on Faraday’s law of electromagnetic induction. The structure of a fluxgate magnetic sensor mainly consists of excitation windings, core and sensing windings, similar to the structure of a transformer. To date, they have been applied to many fields such as geophysics and astro-observations, wearable electronic devices and non-destructive testing. In this review, we report the recent progress in both the basic research and applications of fluxgate magnetic sensors, especially in the past two years. Regarding the basic research, we focus on the progress in lowering the noise, better calibration methods and increasing the sensitivity. Concerning applications, we introduce recent work about fluxgate magnetometers on spacecraft, unmanned aerial vehicles, wearable electronic devices and defect detection in coiled tubing. Based on the above work, we hope that we can have a clearer prospect about the future research direction of fluxgate magnetic sensor.

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Engineering flexible carbon nanofibers concatenated MOFs-derived hollow octahedral CoFe2O4 as anode materials for enhanced lithium storage

Inorganic Chemistry Frontiers ◽

10.1039/d1qi00414j ◽

2021 ◽

Author(s):

Fangfang Xue ◽

Yangyang Li ◽

Chen Liu ◽

Zhigang Zhang ◽

Jun Lin ◽

...

Keyword(s):

Mechanical Property ◽

Anode Materials ◽

Electrode Materials ◽

Electronic Devices ◽

High Capacity ◽

Lithium Ion ◽

Lithium Storage ◽

Excellent Mechanical Property ◽

Wearable Electronic ◽

Wearable Electronic Devices

Constructing suitable electrode materials with high capacity and excellent mechanical property is indispensable for flexible lithium-ion batteries (LIBs) to satisfy the growing flexible and wearable electronic devices. Herein, a necklace-like...

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Textile-Based Triboelectric Nanogenerators for Wearable Self-Powered Microsystems

Micromachines ◽

10.3390/mi12020158 ◽

2021 ◽

Vol 12 (2) ◽

pp. 158

Author(s):

Peng Huang ◽

Dan-Liang Wen ◽

Yu Qiu ◽

Ming-Hong Yang ◽

Cheng Tu ◽

...

Keyword(s):

Rapid Development ◽

Electronic Devices ◽

Quantitative Relationship ◽

Triboelectric Nanogenerator ◽

Output Performance ◽

Integrated Microsystems ◽

Wearable Electronic ◽

Self Powered ◽

Representative Work ◽

Wearable Electronic Devices

In recent years, wearable electronic devices have made considerable progress thanks to the rapid development of the Internet of Things. However, even though some of them have preliminarily achieved miniaturization and wearability, the drawbacks of frequent charging and physical rigidity of conventional lithium batteries, which are currently the most commonly used power source of wearable electronic devices, have become technical bottlenecks that need to be broken through urgently. In order to address the above challenges, the technology based on triboelectric effect, i.e., triboelectric nanogenerator (TENG), is proposed to harvest energy from ambient environment and considered as one of the most promising methods to integrate with functional electronic devices to form wearable self-powered microsystems. Benefited from excellent flexibility, high output performance, no materials limitation, and a quantitative relationship between environmental stimulation inputs and corresponding electrical outputs, TENGs present great advantages in wearable energy harvesting, active sensing, and driving actuators. Furthermore, combined with the superiorities of TENGs and fabrics, textile-based TENGs (T-TENGs) possess remarkable breathability and better non-planar surface adaptability, which are more conducive to the integrated wearable electronic devices and attract considerable attention. Herein, for the purpose of advancing the development of wearable electronic devices, this article reviews the recent development in materials for the construction of T-TENGs and methods for the enhancement of electrical output performance. More importantly, this article mainly focuses on the recent representative work, in which T-TENGs-based active sensors, T-TENGs-based self-driven actuators, and T-TENGs-based self-powered microsystems are studied. In addition, this paper summarizes the critical challenges and future opportunities of T-TENG-based wearable integrated microsystems.

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Wearable electronic devices and technologies

10.3403/bseniec63203-201 ◽

2021 ◽

Keyword(s):

Electronic Devices ◽

Wearable Electronic ◽

Wearable Electronic Devices

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Wearable electronic devices and technologies

10.3403/30382649 ◽

2021 ◽

Keyword(s):

Electronic Devices ◽

Wearable Electronic ◽

Wearable Electronic Devices

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Mortality of people over working age in the context of COVID-19 pandemic

Успехи геронтологии ◽

10.34922/ae.2021.34.6.020 ◽

2022 ◽

pp. 961-968

Author(s):

Т.П. Сабгайда ◽

А.Н. Эделева

Keyword(s):

Information Technologies ◽

Electronic Devices ◽

Social Assistance ◽

Small Scale ◽

New Information ◽

Exogenous Stress ◽

Working Age ◽

Wearable Electronic ◽

Wearable Electronic Devices ◽

Death Causes

Проанализирована смертность лиц старше трудоспособного возраста (женщины 55+ и мужчины 60+) в условиях пандемии COVID-19 для определения потенциальной возможности её предотвращения. Использовали информацию базы данных РФС-ЕМИАС Москвы за 2019, 2020 и 2021 гг. (за периоды до 15 июня). Сделано заключение, что на фоне более корректного учета причин смерти в 2021 г., связанных с инфицированием вирусом SARS-CoV-2, вклад психических расстройств и болезней эндокринной системы в структуру причин смерти лиц старше трудоспособного возраста без учета случаев смерти от COVID-19 превышает показатели 2019 г. Рост смертности от заболеваний этих классов в значительной степени является следствием экзогенного стресса, связанного с пандемией, изоляцией лиц 65 лет и старше в начале пандемии, снижением эффективности их медико-социальной поддержки. Недостатки в организации социальной помощи лицам старших возрастных групп, слабое внедрение новых информационных технологий и носимых электронных устройств в практическую работу здравоохранения, малые масштабы общественных инициатив в области социальной помощи привели к потерям населения, которые могли бы быть предотвращены в период пандемии. The mortality of people over working age (women 55+ and men 60+) was analyzed in the context of COVID-19 pandemic in order to determine the potential for its prevention. The information from the Moscow mortality database for 2019, 2020 and 2021 (up to June 15) was used. Against the background of more correct accounting of death causes associated with SARS-CoV-2 virus infection in 2021, the contributions of mental disorders and endocrine diseases to the structure of death causes (excluding deaths from COVID-19) for people over working age are more than in 2019. The increase in mortality from diseases of these classes is largely a consequence of exogenous stress associated with a pandemic, isolation of people older 64 years and a decrease in the effectiveness of medical care. It was concluded that indirect losses from COVID-19 include avoidable mortality of elderly caused by shortcomings in organization of social assistance for them, the weak introduction of new information technologies and wearable electronic devices into the practical work of health care, small scale of public initiatives in the field of social assistance.

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