Macro fiber composite-based energy harvester for human knee

Gao, Fei; Liu, Gaoyu; Chung, Brendon Lik-Hang; Chan, Hugo Hung-Tin; Liao, Wei-Hsin

doi:10.1063/1.5098962

Cited by 59 publications

(27 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Gao et al investigated a macrofiber composite‐based energy harvester to capture the kinetic energy of knee joint and experimentally validated that the macrofiber composite‐based energy harvester does not significantly affect the metabolic expenditure. [ 70 ] Kuang et al explored a piezoelectric energy harvester with a magnetic plucking mechanism to scavenge the kinetic energy of the knee joint. [ 71 ] Besides macrofiber composite and piezoelectric transducer, stretchable TENG can also be used to be integrated into the clothing to capture the motion of joints bending.…”

Section: Human Motion‐based Energy Harvesting Systemsmentioning

confidence: 99%

“…Compared with electromagnetic energy harvesters, the smart material‐based energy harvesters have the advantage of improved wearing comfort and negligible effect on user effort. [ 70–72,74 ] However, the power output of these devices is significantly compromised (several milliwatts). In addition, due to weak electromechanical coupling between the device and the human body, these smart material‐based energy harvesters can hardly assist human walking to reduce the metabolic cost.…”

Section: Human Motion‐based Energy Harvesting Systemsmentioning

confidence: 99%

See 1 more Smart Citation

Recent Advances in Human Motion Excited Energy Harvesting Systems for Wearables

et al. 2020

Self Cite

View full text Add to dashboard Cite

The development of wearable electronics and sensors is constrained by the limited capacity of their batteries. Therefore, energy harvesting from human motion is explored to provide a promising embedded sustainable power supply for wearable devices. Herein, the principles, development, and applications of human motion excited energy harvesters are reviewed. The energy harvesters are classified based on the human motions with distinguished characteristics: center of mass motion (COM), joint motion, foot strike, and limb swing motion. According to the motion characteristics, the principles, features, and limitations of different energy harvesters are discussed, and the power generation performances are compared. Finally, various self-powered applications enabled by embedded energy harvesters are introduced, so as to show the great potential of embedded energy harvesting systems in boosting the development of the wearables.

show abstract

Section: Human Motion‐based Energy Harvesting Systemsmentioning

confidence: 99%

Section: Human Motion‐based Energy Harvesting Systemsmentioning

confidence: 99%

Recent Advances in Human Motion Excited Energy Harvesting Systems for Wearables

et al. 2020

Self Cite

View full text Add to dashboard Cite

show abstract

“…The ultimate goal is to enable perpetually powered stand-alone wireless microelectronic devices with the energy harnessed from ambient environment. Available energy sources in the environment include mechanical vibrations (Adhikari et al, 2009;Ando et al, 2012Ando et al, , 2014Dai et al, 2011), ocean wave energy (Khan and Kim, 2016;Liu et al, 2018;Wang et al, 2017c), human motions (Fan et al, 2017;Gao et al, 2019;Wang et al, 2017a), and wind energy (Hu et al, 2016;Orrego et al, 2017;Zhang et al, 2017). In recent years, piezoelectric energy harvesting from structural vibrations has emerged as a promising power generating technique which converts alternating structural strain energy into electricity via direct piezoelectric effect.…”

Section: Introductionmentioning

confidence: 99%

Enhanced frequency synchronization for concurrent aeroelastic and base vibratory energy harvesting using a softening nonlinear galloping energy harvester

Chen

Eager

Zhao

2021

Journal of Intelligent Material Systems and Structures

View full text Add to dashboard Cite

This paper proposes a softening nonlinear aeroelastic galloping energy harvester for enhanced energy harvesting from concurrent wind flow and base vibration. Traditional linear aeroelastic energy harvesters have poor performance with quasi-periodic oscillations when the base vibration frequency deviates from the aeroelastic frequency. The softening nonlinearity in the proposed harvester alters the self-excited galloping frequency and simultaneously extends the large-amplitude base-excited oscillation to a wider frequency range, achieving frequency synchronization over a remarkably broadened bandwidth with periodic oscillations for efficient energy conversion from dual sources. A fully coupled aero-electro-mechanical model is built and validated with measurements on a devised prototype. At a wind speed of 5.5 m/s and base acceleration of 0.1 g, the proposed harvester improves the performance by widening the effective bandwidth by 300% compared to the linear counterpart without sacrificing the voltage level. The influences of nonlinearity configuration, excitation magnitude, and electromechanical coupling strength on the mechanical and electrical behavior are examined. The results of this paper form a baseline for future efficiency enhancement of energy harvesting from concurrent wind and base vibration utilizing monostable stiffness nonlinearities.

show abstract

“…Further, it has been reported that after 2 hours of walking or 30 minutes of running, energy of the magnitude 1.4 J will be harvested to the storage element. Gao et al 9 utilised human knee motion with a light weight electromagnetic energy harvester for power generation without increase in walking efforts and reported peak power of 1.6 mW. Cai et al 10 have used mechanical motion rectifier in a human motion based energy harvester that delivered peak power of 300 mW for walking speed of 4.9 Kmph.…”

Section: Introductionmentioning

confidence: 99%

Design and analysis of motion and energy regulating vibration harvester

Satpute¹,

Jugulkar²,

Jabade³

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part C:

View full text Add to dashboard Cite

In this paper a novel design of energy harvester has been proposed, which converts harmonic or random vibrations energy into useful electric power. The energy harvester comprises of mechanical motion rectifier, motion regulator, strain energy storage element and a rotary electric generator. The mechanical motion rectifier comprises of a spatial mechanism with unidirectional bearings and spherical joint that converts the linear oscillating force into unidirectional torque pulses. Further, motion regulating mechanism directs the energy flow to the strain energy storage element and drives the electric generator. The arrangement ensures that flow of vibration energy is regulated such that it is stored in the spring up to a threshold limit and thereafter dissipated to the electric generator. Rigid body simulations in Adams and Matlab have been used in design and analysis of the energy harvester with investigations for the effect of significant design parameters. Experimentation on a prototype has been performed to validate the numerical model which delivered 4.13 W of peak power and average power of 0.12–0.52 W within frequency range of 1–15 Hz. Simulation results on a real size device with higher torsion spring stiffness indicates that the harvester can operate with 69.8% efficiency and deliver 0.32–2.45 W of average power for frequency of 0.5–4 Hz.

show abstract

Macro fiber composite-based energy harvester for human knee

Cited by 59 publications

References 44 publications

Recent Advances in Human Motion Excited Energy Harvesting Systems for Wearables

Recent Advances in Human Motion Excited Energy Harvesting Systems for Wearables

Enhanced frequency synchronization for concurrent aeroelastic and base vibratory energy harvesting using a softening nonlinear galloping energy harvester

Design and analysis of motion and energy regulating vibration harvester

Contact Info

Product

Resources

About