Biomechanical Energy Harvesting System With Optimal Cost-of-Harvesting Tracking Algorithm

Cervera, Alon; Rubinshtein, Ze'ev; Gad, Moran; Riemer, Raziel; Peretz, Mor Mordechai

doi:10.1109/jestpe.2015.2514079

Cited by 21 publications

(21 citation statements)

References 17 publications

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“…e ., replacement). In this mode, the exoskeleton negative power could drive an electrical generator and energy could be stored in a battery or used to power electronic devices [ 19 , 60 , 61 ]. If the negative power is normally recycled within the body and transferred to the positive power phase, additional biological power may be required to maintain biological positive power output (Bio Add ).…”

Section: Discussionmentioning

confidence: 99%

“…(C) The exoskeleton (green) produces negative power and extracts energy from the joint during the negative power phase of the gait via a damper or some other energy sink and, in this example, the user maintains the total (exo+ bio) negative power output of the joint, enabling a reduced biological contribution (i.e., replacement). In this mode, the exoskeleton negative power could drive an electrical generator and energy could be stored in a battery or used to power electronic devices [19,60,61]. If the negative power is normally recycled within the body and transferred to the positive power phase, additional biological power may be required to maintain biological positive power output (Bio Add ).…”

Section: Implications For Lower-limb Exoskeleton Developmentmentioning

confidence: 99%

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Mechanics of walking and running up and downhill: A joint-level perspective to guide design of lower-limb exoskeletons

et al. 2020

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Lower-limb wearable robotic devices can improve clinical gait and reduce energetic demand in healthy populations. To help enable real-world use, we sought to examine how assistance should be applied in variable gait conditions and suggest an approach derived from knowledge of human locomotion mechanics to establish a 'roadmap' for wearable robot design. We characterized the changes in joint mechanics during walking and running across a range of incline/decline grades and then provide an analysis that informs the development of lowerlimb exoskeletons capable of operating across a range of mechanical demands. We hypothesized that the distribution of limb-joint positive mechanical power would shift to the hip for incline walking and running and that the distribution of limb-joint negative mechanical power would shift to the knee for decline walking and running. Eight subjects (6M,2F) completed five walking (1.25 m s-1) trials at-8.53˚,-5.71˚, 0˚, 5.71˚, and 8.53˚grade and five running (2.25 m s-1) trials at-5.71˚,-2.86˚, 0˚, 2.86˚, and 5.71˚grade on a treadmill. We calculated time-varying joint moment and power output for the ankle, knee, and hip. For each gait, we examined how individual limb-joints contributed to total limb positive, negative and net power across grades. For both walking and running, changes in grade caused a redistribution of joint mechanical power generation and absorption. From level to incline walking, the ankle's contribution to limb positive power decreased from 44% on the level to 28% at 8.53˚uphill grade (p < 0.0001) while the hip's contribution increased from 27% to 52% (p < 0.0001). In running, regardless of the surface gradient, the ankle was consistently the dominant source of lower-limb positive mechanical power (47-55%). In the context of our results, we outline three distinct use-modes that could be emphasized in future lower-limb exoskeleton designs 1) Energy injection: adding positive work into the gait cycle, 2) Energy extraction: removing negative work from the gait cycle, and 3) Energy transfer: extracting energy in one gait phase and then injecting it in another phase (i.e., regenerative braking).

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Section: Discussionmentioning

confidence: 99%

Section: Implications For Lower-limb Exoskeleton Developmentmentioning

confidence: 99%

Mechanics of walking and running up and downhill: A joint-level perspective to guide design of lower-limb exoskeletons

et al. 2020

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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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“…Reference 67 developed an efficient novel bio‐waste hybrid EH for abundantly accessible usual self‐arranged collagen leathery fish scale with a high power density of 28.5 μW/cm 2 . Similarly, Reference 68 presented a biomechanical EH for the human natural motion and Reference 69 developed bioenergy harvester from living tree are shown in Figure 9. The bar graph depicted analysis of various parameters for bioenergy harvesters in Figure 10.…”

Section: Energy Harvesting Systems For Wsnsmentioning

confidence: 99%

Energy harvesting in wireless sensor networks: A taxonomic survey

2020

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Wireless sensor networks (WSNs) have aroused the conspectus attention of scholars due to their extensive deployment in the emerging fields of the Internet of Things (IoT's) and self-driven devices. But WSNs technologies having a major bottleneck has been associated with limited energy. Mostly research in WSNs has been focused on minimizing energy usage to extend the survival time of limited power source in a network. Energy harvesting can be addressing its energy-scarcity problem of WSNs, so it is giving popularity to Energy Harvesting in Wireless Sensor Networks (EH-WSNs). The paper presents a comprehensive taxonomic survey on recently energy harvesting techniques and algorithms that proposed by various authors and also examined the work done by the various researchers in the field of EH-WSNs. For the ready reference of the researchers, a concise summary and comparative analysis of various promising techniques for energy harvesting have also been included in the systematic survey. However, many equipment developed using the hybridization method in a singular package to get full advantages of available free energy, are explored in this review. The review on hybrid energy harvesting (HEH) systems can be considered as the originality of this article. However, the outdoor photovoltaics have been provided maximum power density about ≈100 mW/cm 3 , and the piezoelectric harvesters have been given maximum voltage about 325 V but the current in very minute amount. The thermoelectric, rectenna and hybrid energy harvesters (EHs) have been given high efficiency more than 80%. Additionally, hybrid EHs have location/timeindependent characteristics which harnessed power from more than one source that can be became more popular for upcoming leading technologies of self-driven or autonomous devices shifting from battery operated devices. Finally, the survey also identifies often challenges and various significant issues that still essential to be addressed to develop a cost effective, efficient, long-lasting, and almost maintenance-free energy harvesting systems for WSNs along with trail to their possible solutions for future perspectives.

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Biomechanical Energy Harvesting System With Optimal Cost-of-Harvesting Tracking Algorithm

Cited by 21 publications

References 17 publications

Mechanics of walking and running up and downhill: A joint-level perspective to guide design of lower-limb exoskeletons

Mechanics of walking and running up and downhill: A joint-level perspective to guide design of lower-limb exoskeletons

Different kinds of energy harvesters from human activities

Energy harvesting in wireless sensor networks: A taxonomic survey

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