A lightweight biomechanical energy harvester with high power density and low metabolic cost

Fan, Jun; Chen, Xiong; Huang, Zhongkui; Wang, Chen-Bo; Chen, Wenbin

doi:10.1016/j.enconman.2019.05.025

Cited by 40 publications

(33 citation statements)

References 31 publications

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“…All these power ranges are very minimal as the piezoelectric, triboelectric, and microelectromagnetic harvesters were used as the generators. Longhan Xie et al [26] harvested 6.47 W at walking speed of 1.41 m/s and Jun Fan et al [28] were able to generate 4.1 W at 1.5 m/s walking speed, at the lower walking speed of 1.34 m/s minimum RMS power generated in this study was 5.09 W and maximum RMS power generated was 6.93 W. Collier Apgar et al [27] were able to generate 8.43 W at 5211 RPM, whereby in this study the RMS power generated at 800 RPM was in the range of 11.2 W to 14.95 W. This was comparatively higher power at a lower speed. Maxwell Donelan et al [20] designed a device that generated 3.5 ± 0.35 W per device at 1.5 m/s walking speed under continuous generation mode.…”

Section: Resultsmentioning

confidence: 99%

“…At the 5.1 km/h walking speed, the harvester generates a maximum power of 6.47 W. Collier Apgar et al [27] use a brushless DC motor as the generator by integrating a gear train with a 1:86 ratio. At 5211 RPM, the generator produces 8.43 W. Jun Fan et al [28] investigated a knee-mounted harvester with a cable-pulley mechanism. This cable-pulley mechanism converts the flexion and extension gait cycle of the knee to electrical power.…”

Section: Introductionmentioning

confidence: 99%

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Simulation of Electromagnetic Generator as Biomechanical Energy Harvester

et al. 2022

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Portable electronic devices are dependent on batteries as the ultimate source of power. Irrefutably, batteries only have a limited operating period as they need to be regularly replaced or recharged. In many situations, the power grid infrastructure is not easily accessible to recharge the batteries and the recharging duration is also not convenient for the user to wait. Enhancement of a reliable electronic system by preventing power interruptions in remote areas is essential. Similarly, modern medical instruments and implant devices need reliable, almost maintenance-free power to ensure they are able to operate in all situations without any power interruptions. In this paper, the small-sized electromagnetic generator was designed to produce higher power by utilizing the knee angle transition involved during the walking phase as the input rotary force. The proposed generator design was investigated through COMSOL Multiphysics simulation. The achieved output RMS power was in the range of 3.31 W to 14.95 W based on the RPM range between 360 RPM to 800 RPM.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Simulation of Electromagnetic Generator as Biomechanical Energy Harvester

et al. 2022

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“…The lower limbs pull the cable in the swing stage of the walking cycle, one end of each cable is connected to the human lower tibia, and the other end F I G U R E 7 Different energy harvesters with center mass motion during human walking. A, An energy harvester that convert intermittent, bidirectional, low-speed and high torque mechanical power into electrical energy developed by Li et al 75 B, A energy harvester with a spring damping mechanism with spiral spring and generator developed by Xie et al 76 C, A knee-mounted biomechanical energy harvester developed by Chen et al 77 D, An innovative biomechanical energy harvester based on the regenerative braking developed by Cervera et al 78 E, A light cable pulley harvester installed on the knee joint developed by Fan et al 79 F, An energy harvester with a one-way clutch driving gear system developed by Rubinshtein et al 80 G, An energy harvester capture the linear displacement between the buttocks and ankles developed by Michael et al 81 H, An energy harvester based on lightweight large fiber composite (MFC) developed by Gao et al 82 [Colour figure can be viewed at wileyonlinelibrary.com] is connected to the pulley. The movement of two limbs is to be incorporated into a single generating unit.…”

Section: Electromagnetic Inductionmentioning

confidence: 99%

Different kinds of energy harvesters from human activities

Zhou

Han

et al. 2021

Intl J of Energy Research

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Human has abundant energy and can achieve energy from different human daily activities with energy harvesters. It can provide power for the wearable electronic devices, and the micro implanted electronic devices. Achieve the purpose of assisting movement, reducing metabolism, detecting life signals, and measuring metabolism level. Energy sources are mainly divided into mechanical energy and biochemical energy. According to the biomechanical energy achieved from different parts of the body, the energy harvesters are classified. The working principle, design idea, wearing style, and materials of the energy harvesters are compared and analyzed. It is indicated that the biochemical energy harvesting technology based on cell and molecular level is an innovative method which can be used for low-power devices with great potential. While mechanical energy technology based on the principle can achieve more energy, but larger and heavy structure will lead to poor wearing experience. Meanwhile, they should complement each other and excavate human energy. This paper is not only a summary of the current research, but also points to weaknesses and outlines possible improvements that are suitable for practical applications through comparison and analysis of different energy harvesters. Novelty Statement Human has abundant energy and can achieve energy from different daily activities. Energy sources are divided into mechanical energy and biochemical energy. The biochemical energy harvesters based on cell and molecular level is an innovative method which can be used for low-power devices. While mechanical energy harvesters can achieve more energy. This paper provides useful information for researchers to develop energy harvesters suitable for practical application in daily life.

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“…For example, Fan et al used a cable‐driven mechanism to reduce the mass of the energy harvester, obtaining an average power of 4.1 W with reduced COH and TCOH. [ 69 ] Although these devices can achieve watt‐level power output, the complicated mechanical structures result in heavy weight of the energy harvesters. To further cut down the weight and improve the wearing comfort of the device, various smart material‐based energy harvesters have been developed.…”

Section: Human Motion‐based Energy Harvesting Systemsmentioning

confidence: 99%

“…[ 73 ] The cable‐driven mechanism provides an effective solution to reduce the effect of weight and position on TCOH. [ 50,68,69 ]…”

Section: Human Motion‐based Energy Harvesting Systemsmentioning

confidence: 99%

Recent Advances in Human Motion Excited Energy Harvesting Systems for Wearables

et al. 2020

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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.

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A lightweight biomechanical energy harvester with high power density and low metabolic cost

Cited by 40 publications

References 31 publications

Simulation of Electromagnetic Generator as Biomechanical Energy Harvester

Simulation of Electromagnetic Generator as Biomechanical Energy Harvester

Different kinds of energy harvesters from human activities

Recent Advances in Human Motion Excited Energy Harvesting Systems for Wearables

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