Powering smart wearable systems with flexible solar energy harvesting

Jokic, Petar; Magno, Michele

doi:10.1109/iscas.2017.8050615

Cited by 61 publications

(22 citation statements)

References 8 publications

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“…Therefore, it is predicted that energy harvesting will be an essential part of the high power future wearables [188]. Many researchers already work on various opportunities to enable this feature, including microkinetic energy harvesting systems utilizing frequencies occurring in human motion to harvest energy [189], powering wearables with solar energy harvesting [190], self-powering smart fabric [191] and wireless power transfer for implantables [192], [193]. Considering the increasing power requirement of the IoT devices, some researchers have proposed green energy harvesting solutions for IoT devices [194].…”

Section: Challenges and Future Research Directionsmentioning

confidence: 99%

Towards Energy Efficiency in the Internet of Wearable Things: A Systematic Review

et al. 2020

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Personal mobile devices such as smartwatches, smart jewelry, and smart clothes have launched a new trend in the Internet of Things (IoT) era, namely the Internet of Wearable Things (IoWT). These wearables are small IoT devices capable of sensing, storing, processing, and exchanging data to assist users by improving their everyday life tasks through various applications. However, the IoWT has also brought new challenges for the research community to address such as increasing demand for enhanced computational power, better communication capabilities, improved security and privacy features, reduced form factor, minimal weight, and better comfort. Most wearables are battery-powered devices that need to be recharged-therefore, the limited battery life remains the bottleneck leading to the need to enhance the energy efficiency of wearables, thus, becoming an active research area. This paper presents a survey of energy-efficient solutions proposed for diverse IoWT applications by following the systematic literature review method. The available techniques published from 2010 to 2020 are scrutinized, and the taxonomy of the available solutions is presented based on the targeted application area. Moreover, a comprehensive qualitative analysis compares the proposed studies in each application area in terms of their advantages, disadvantages, and main contributions. Furthermore, a list of the most significant performance parameters is provided. A more in-depth discussion of the main techniques to enhance wearables' energy efficiency is presented by highlighting the trade-offs involved. Finally, some potential future research directions are highlighted.

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Section: Challenges and Future Research Directionsmentioning

confidence: 99%

Towards Energy Efficiency in the Internet of Wearable Things: A Systematic Review

et al. 2020

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“…Especially, the flexible solar cell has more potential applications in the real-time energy harvesting applications because they are light in weight, thin, flexible, and easy to integrate with clothes. Thus, the energy harvesting system has been reported using polyamide thin film photovoltaic smart bracelet for healthcare application, measuring the heartbeats of a patient through photoplethysmography (PPG) [1,2]. Inductively, the power transfer circuit is designed on plastic with the flexible solar cell as a power source [3], an intelligent hardware-based charging controller circuit is presented for wireless sensor application [4].…”

Section: Introductionmentioning

confidence: 99%

Integration of RF rectenna with thin film solar cell to power wearable electronics

Naresh

Singh

Sharma

2020

Int. J. Microw. Wireless Technol.

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This paper reports an integration of dual band microstrip antenna with thin film amorphous silicon solar cell which creates a wearable system to harvest microwave energy. The multiple layers in the encapsulation of the thin film solar cell are used as a substrate for microstrip antenna. The rectifier and matching circuit are designed on cotton jeans material and the whole system is mechanically supported by the foam of 5 mm thick. The performance of the antenna is studied for the mechanical bending condition. The device has maintained good power conversion efficiency. The efficiency of the voltage doubler is tested by varying radio frequency power levels from −30 to10 dBm. The voltage doubler conversion efficiency at 1.85 and 2.45 GHz are 58 and 43%, respectively, for a load of 7.5 kΩ for an input power level of −5 dBm.

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“…When such a generator is integrated with clothing, no direct contact with skin exists, leading to power outputs as low as 0.5–1.25 µW (2.6–to 6.5 nW/cm 2 ) [4]. Thus, those sources are unable to provide enough power to serve as the sole supply even for low‐power wearable sensor systems, which draw an average power up to the order of 10 mW [5, 6].…”

Section: Introductionmentioning

confidence: 99%

“…Photovoltaic (PV) generators are capable of supplying such devices for a reasonable time, thanks to their power density of the order of 10 mW/cm 2 [3]. For this reason, they have been successfully used in recent wearable sensor systems as the sole source of energy [6, 17, 18]. Compared to other alternative energy sources, solar modules are easy to integrate with clothing.…”

Section: Introductionmentioning

confidence: 99%

Comprehensive evaluation of a photovoltaic energy harvesting system in smart clothing for mountain rescuers

Dąbrowska

Bartkowiak

Pekoslawski

et al. 2020

IET Renewable Power Generation

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Powering smart wearable systems with flexible solar energy harvesting

Cited by 61 publications

References 8 publications

Towards Energy Efficiency in the Internet of Wearable Things: A Systematic Review

Towards Energy Efficiency in the Internet of Wearable Things: A Systematic Review

Integration of RF rectenna with thin film solar cell to power wearable electronics

Comprehensive evaluation of a photovoltaic energy harvesting system in smart clothing for mountain rescuers

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