A Battery‐Less Arbitrary Motion Sensing System Using Magnetic Repulsion‐Based Self‐Powered Motion Sensors and Hybrid Nanogenerator

2020 ◽  
Vol 30 (36) ◽  
pp. 2003276
Author(s):  
Trilochan Bhatta ◽  
Pukar Maharjan ◽  
Md. Salauddin ◽  
M. Toyabur Rahman ◽  
SM Sohel Rana ◽  
...  
Keyword(s):  
Motion Sensors ◽  
Motion Sensing ◽  
Sensing System ◽  
Hybrid Nanogenerator ◽  
Self Powered

scholarly journals Gait Assessment of Younger and Older Adults with Portable Motion-Sensing Methods: A User Study

2019 ◽  
Vol 2019 ◽  
pp. 1-13 ◽  
Author(s):  
Runting Zhong ◽  
Pei-Luen Patrick Rau ◽  
Xinghui Yan
Keyword(s):  
Older Adults ◽  
Technology Acceptance ◽  
User Experience ◽  
User Study ◽  
Sensor Technology ◽  
Motion Sensors ◽  
User Evaluation ◽  
Motion Sensing ◽  
Sensing System ◽  
Gait Assessment

Wearable motion sensors with built-in accelerometers have been deployed for gait assessment. This study aims at exploring gait patterns between younger and older adults using a motion-sensing system and exploring sensor technology acceptance among participants. The motion-sensing system was formed by a smart bracelet, an Android application, and a website based on Microsoft Azure. The study employed quasi-experimental, nonexperimental, and qualitative design. A total of 28 younger and 28 older adults were recruited. The gait assessment result indicated that the root mean square (RMS) acceleration increased significantly as the walking pace increased based on the right ankle sensor. Older participants usually presented a lower magnitude of acceleration patterns in the anteroposterior and mediolateral direction compared with the younger participants, while the stride regularity and variability were not significantly different between younger and older participants. User evaluation indicated that the user experience of the motion-sensing system could be further enhanced by providing feedback on the smart bracelet display, generating an analysis report on the gait visualization website, and involving family members in data sharing for older adults. Study findings demonstrated that it is feasible to use portable motion-sensing methods to measure gait characteristics among Chinese adults. Suggestions proposed through user evaluation could be of value to improve the user experience of the motion-sensing system.

scholarly journals Stretchable and Wearable Triboelectric Nanogenerator Based on Kinesio Tape for Self-Powered Human Motion Sensing

Nanomaterials ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 657 ◽  
Author(s):  
Shutang Wang ◽  
Minghui He ◽  
Bingjuan Weng ◽  
Lihui Gan ◽  
Yingru Zhao ◽  
...  
Keyword(s):  
Short Circuit ◽  
Human Motion ◽  
Triboelectric Nanogenerator ◽  
Motion Sensors ◽  
Motion Sensing ◽  
Compact Structure ◽  
Term Operation ◽  
Wide Range ◽  
Macro Scale ◽  
Self Powered

Recently, wearable, self-powered, active human motion sensors have attracted a great deal of attention for biomechanics, physiology, kinesiology, and entertainment. Although some progress has been achieved, new types of stretchable and wearable devices are urgently required to promote the practical application. In this article, targeted at self-powered active human motion sensing, a stretchable, flexible, and wearable triboelectric nanogenerator based on kinesio tapes (KT-TENG) haven been designed and investigated systematically. The device can effectively work during stretching or bending. Both the short-circuit transferred charge and open-circuit voltage exhibit an excellent linear relationship with the stretched displacements and bending angles, enabling its application as a wearable self-powered sensor for real-time human motion monitoring, like knee joint bending and human gestures. Moreover, the KT-TENG shows good stability and durability for long-term operation. Compared with the previous works, the KT-TENG without a macro-scale air gap inside, or stretchable triboelectric layers, possesses various advantages, such as simple fabrication, compact structure, superior flexibility and stability, excellent conformable contact with skin, and wide-range selection of triboelectric materials. This work provides a new prospect for a wearable, self-powered, active human motion sensor and has numerous potential applications in the fields of healthcare monitoring, human-machine interfacing, and prosthesis developing.

Stretchable-Rubber-Based Triboelectric Nanogenerator and Its Application as Self-Powered Body Motion Sensors

2015 ◽  
Vol 25 (24) ◽  
pp. 3688-3696 ◽  
Author(s):  
Fang Yi ◽  
Long Lin ◽  
Simiao Niu ◽  
Po Kang Yang ◽  
Zhaona Wang ◽  
...  
Keyword(s):  
Body Motion ◽  
Triboelectric Nanogenerator ◽  
Motion Sensors ◽  
Self Powered

Hybrid Nanogenerator-based Self-Powered Double-Authentication Microsystem for Smart Identification

Nano Energy ◽  
2021 ◽  
pp. 106100
Author(s):  
Dan-Liang Wen ◽  
Peng Huang ◽  
Heng-Yi Qian ◽  
Yan-Yuan Ba ◽  
Zhen-Yu Ren ◽  
...  
Keyword(s):  
Hybrid Nanogenerator ◽  
Self Powered

Reverse Electrowetting-on-Dielectric Energy Harvesting Integrated With Charge Amplifier and Rectifier for Self-Powered Motion Sensors

2020 ◽  
Author(s):  
Pashupati R. Adhikari ◽  
Nishat T. Tasneem ◽  
Dipon K. Biswas ◽  
Russell C. Reid ◽  
Ifana Mahbub
Keyword(s):  
Energy Harvester ◽  
Schottky Diodes ◽  
Boost Converter ◽  
Motion Sensor ◽  
Motion Sensors ◽  
Frequency Range ◽  
Charge Amplifier ◽  
Electrowetting On Dielectric ◽  
Dc Voltage ◽  
Self Powered

Abstract This paper presents a reverse electrowetting-on-dielectric (REWOD) energy harvester integrated with rectifier, boost converter, and charge amplifier that is, without bias voltage, capable of powering wearable sensors for monitoring human health in real-time. REWOD has been demonstrated to effectively generate electrical current at a low frequency range (< 3 Hz), which is the frequency range for various human activities such as walking, running, etc. However, the current generated from the REWOD without external bias source is insufficient to power such motion sensors. In this work, to eventually implement a fully self-powered motion sensor, we demonstrate a novel bias-free REWOD AC generation and then rectify, boost, and amplify the signal using commercial components. The unconditioned REWOD output of 95–240 mV AC is generated using a 50 μL droplet of 0.5M NaCl electrolyte and 2.5 mm of electrode displacement from an oscillation frequency range of 1–3 Hz. A seven-stage rectifier using Schottky diodes having a forward voltage drop of 135–240 mV and a forward current of 1 mA converts the generated AC signal to DC voltage. ∼3 V DC is measured at the boost converter output, proving the system could function as a self-powered motion sensor. Additionally, a linear relationship of output DC voltage with respect to frequency and displacement demonstrates the potential of this REWOD energy harvester to function as a self-powered wearable motion sensor.

High Output Compound Triboelectric Nanogenerator Based on Paper for Self-Powered Height Sensing System

2018 ◽  
Vol 17 (6) ◽  
pp. 1217-1223 ◽  
Author(s):  
Kequan Xia ◽  
Zhiyuan Zhu ◽  
Hongze Zhang ◽  
Chaolin Du ◽  
Rongji Wang ◽  
...  
Keyword(s):  
Triboelectric Nanogenerator ◽  
Sensing System ◽  
Self Powered ◽  
High Output

Energy harvesting and self-powered microphone application on multifunctional inorganic-organic hybrid nanogenerator

Energy ◽  
2019 ◽  
Vol 166 ◽  
pp. 963-971 ◽  
Author(s):  
Ayesha Sultana ◽  
Md. Mehebub Alam ◽  
Sujoy Kumar Ghosh ◽  
Tapas Ranjan Middya ◽  
Dipankar Mandal
Keyword(s):  
Energy Harvesting ◽  
Organic Hybrid ◽  
Hybrid Nanogenerator ◽  
Self Powered
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