Kinetic motion sensors based on flexible and lead-free hybrid piezoelectric composite energy harvesters with nanowires-embedded electrodes for detecting articular movements

2021 ◽  
Vol 212 ◽  
pp. 108705
Author(s):  
Seong Su Ham ◽  
Gyoung-Ja Lee ◽  
Dong Yeol Hyeon ◽  
Yeon-gyu Kim ◽  
Yeong-won Lim ◽  
...  
Keyword(s):  
Lead Free ◽  
Piezoelectric Composite ◽  
Motion Sensors ◽  
Energy Harvesters ◽  
Composite Energy

Barium Titanate Film Interfaces for Hybrid Composite Energy Harvesters

2017 ◽  
Vol 9 (4) ◽  
pp. 4057-4065 ◽  
Author(s):  
Christopher C. Bowland ◽  
Mohammad H. Malakooti ◽  
Henry A. Sodano
Keyword(s):  
Barium Titanate ◽  
Hybrid Composite ◽  
Energy Harvesters ◽  
Composite Energy

scholarly journals Responses of bistable piezoelectric-composite energy harvester by means of recurrences

2016 ◽  
Vol 76-77 ◽  
pp. 823-832 ◽  
Author(s):  
Arkadiusz Syta ◽  
Christopher R. Bowen ◽  
H. Alicia Kim ◽  
Andrzej Rysak ◽  
Grzegorz Litak
Keyword(s):  
Energy Harvester ◽  
Piezoelectric Composite ◽  
Composite Energy

scholarly journals Crack Protective Layered Architecture of Lead-Free Piezoelectric Energy Harvester in Bistable Configuration

Sensors ◽  
2020 ◽  
Vol 20 (20) ◽  
pp. 5808
Author(s):  
Ondrej Rubes ◽  
Zdenek Machu ◽  
Oldrich Sevecek ◽  
Zdenek Hadas
Keyword(s):  
Energy Harvester ◽  
Lead Free ◽  
Vibration Energy Harvester ◽  
Ultra Low Power ◽  
Energy Harvesters ◽  
Layered Architecture ◽  
Piezoelectric Energy ◽  
Wide Range ◽  
Ultra Low Power Devices ◽  
Novel Design

Kinetic piezoelectric energy harvesters are used to power up ultra-low power devices without batteries as an alternative and eco-friendly source of energy. This paper deals with a novel design of a lead-free multilayer energy harvester based on BaTiO3 ceramics. This material is very brittle and might be cracked in small amplitudes of oscillations. However, the main aim of our development is the design of a crack protective layered architecture that protects an energy harvesting device in very high amplitudes of oscillations. This architecture is described and optimized for chosen geometry and the resulted one degree of freedom coupled electromechanical model is derived. This model could be used in bistable configuration and the model is extended about the nonlinear stiffness produced by auxiliary magnets. The complex bistable vibration energy harvester is simulated to predict operation in a wide range of frequency excitation. It should demonstrate typical operation of designed beam and a stress intensity factor was calculated for layers. The whole system, without presence of cracks, was simulated with an excitation acceleration of amplitude up to 1g. The maximal obtained power was around 2 mW at the frequency around 40 Hz with a maximal tip displacement 7.5 mm. The maximal operating amplitude of this novel design was calculated around 10 mm which is 10-times higher than without protective layers.

scholarly journals LiNbO3 films – A low-cost alternative lead-free piezoelectric material for vibrational energy harvesters

2021 ◽  
Vol 149 ◽  
pp. 107171
Author(s):  
Giacomo Clementi ◽  
Giulia Lombardi ◽  
Samuel Margueron ◽  
Miguel Angel Suarez ◽  
Eric Lebrasseur ◽  
...  
Keyword(s):  
Piezoelectric Material ◽  
Vibrational Energy ◽  
Low Cost ◽  
Lead Free ◽  
Energy Harvesters

Experimental Usage of Humanoid Robot for Energy Harvesting Study From Walking Motion

2016 ◽  
Author(s):  
Youngsu Cha ◽  
Seokmin Hong
Keyword(s):  
Energy Harvesting ◽  
Humanoid Robot ◽  
Average Power ◽  
Piezoelectric Composite ◽  
Energy Sources ◽  
Knee Motion ◽  
Energy Harvesters ◽  
Walking Motion ◽  
Theoretical Predictions ◽  
Energy Transducer

Human motions are good energy sources for energy harvesters to support wearable devices. Among them, walking motions have received considerable attention as energy sources due to their large kinetic energy. Most of the studies about energy harvesting from human walking have been tested in real human wearing energy harvesters. In this paper, we use a humanoid robot to study energy harvesting from walking motion. We quantitatively analyze the energy harvesting from walking through the repeatable motion of the humanoid robot. A knee pad is attached on the leg of the humanoid robot. We make a pocket on the knee pad and put a piezoelectric composite as an energy transducer into the pocket. We refer to a trajectory of knee angle during one walking cycle of human from literature. The knee motion is formulated by performing Fourier series fitting for programming the movement of the humanoid robot. Additionally, an electromechanical model is used to explain the electrical responses from the piezoelectric composite in the pocket during the motion of the humanoid robot. We estimate average power transferred from the piezoelectric composite to the load resistances during the knee motion by using the model and validate the theoretical predictions by comparing with experimental results.

Human Body Constituted Triboelectric Nanogenerators as Energy Harvesters, Code Transmitters, and Motion Sensors

2018 ◽  
Vol 1 (6) ◽  
pp. 2955-2960 ◽  
Author(s):  
Renyun Zhang ◽  
Magnus Hummelgård ◽  
Jonas Örtegren ◽  
Martin Olsen ◽  
Henrik Andersson ◽  
...  
Keyword(s):  
Human Body ◽  
Motion Sensors ◽  
Energy Harvesters ◽  
Triboelectric Nanogenerators
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