An Ergonomic Wireless Charging System for Integration With Daily Life Activities

“…Cooperation for healing and treatment among health centers and experts for scientific cooperation, studying the characteristics of chronic diseases, confronting pandemics, discovering treatments, developing smart devices and services, etc. [ 84 , 93 ].…”

Section: Ioht Definition Domains and Applicationsmentioning

confidence: 99%

An empirical investigation into the altering health perspectives in the internet of health things

Bahbouh

Compte

Valdes

et al. 2022

Int. j. inf. tecnol.

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“…While low-power wearable sensors can be powered using far/mid-field WPT [13], wearable applications such as Joule heaters [14] or mobile neural network classification processors, sampling wearable sensors [15], cannot be powered using any of the reported wearable textile-based energy harvesting or WPT solutions. To explain, wearable mid/far-field WPT solutions are focused on µW to mW applications [9], [16], [17]. Moreover, wearable and implantable near-field WPT research is mostly focused on the passive electromagnetic link [11], [18]- [20], with no flexible or textile-based rectifiers designed and optimized for wearable or large-area electronics.…”

Section: Introductionmentioning

confidence: 99%

A Wearable All-Printed Textile-Based 6.78 MHz 15 W-Output Wireless Power Transfer System and its Screen-Printed Joule Heater Application

Wagih¹,

Komolafe²,

Weddell³

et al. 2022

Preprint

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<p>While research in passive flexible circuits for Wireless Power Transfer (WPT) such as coils and resonators continues to advance, limitations in their power handling and low efficiency have hindered the realization of efficient all-printed high-power wearable WPT receivers. Here, we propose a screen-printed textile-based 6.78 MHz resonant inductive WPT system using planar inductors with concealed metal-insulator-metal (MIM) tuning capacitors. A printed voltage doubler rectifier based on Silicon Carbide (SiC) diodes is designed and integrated with the coils, showing a power conversion efficiency of 80-90% for inputs between 2 and 40 W. Compared to prior wearable WPT receivers, it offers an order of magnitude improvement in power handling along with higher efficiency (approaching 60%), while using all-printed passives and a compact rectifier. The coils exhibit a simulated Specific Absorption Rate (SAR) under 0.4 W/kg for 25 W received power, and under 21◦C increase in the coils’ temperature for a 15 W DC output. We finally demonstrate a wirelessly-powered textilebased carbon-silver Joule heater, capable of reaching up to 60◦C at 2 cm separation from the transmitter, as a potential wearable application which can only be wireless-powered using the proposed system. </p>

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“…Specifically, for power needs of mobile devices, RF technology has offered a new vision of wirelessly powered world 5 . This can be realized through a wireless power transmission grid, which could power a range of devices from traditional mobile phones to wearable health and fitness devices 6 , implantable devices 7 , and other Internet of Things (IoT) type devices 8 . This vision is specially becoming true on account of ever reducing power usage of modern electronics and innovations in rechargeable batteries.…”

Section: Introductionmentioning

confidence: 99%

Adhoc mobile power connectivity using a wireless power transmission grid

Gaire

Vital

Khan

et al. 2021

Sci Rep

Self Cite

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Wireless charging of devices has significant outcomes for mobile devices, IoT devices and wearables. Existing technologies consider using Point to Point type wireless transfer from a transmitter Tx (node that is sending Power) to a receiver Rx (node that receives power), which limits the area of coverage for devices. As a result, existing systems are forced to use near field coupling to charge such devices. Fundamental limitation is also that such methods limit charging to a small hotspot. In partnership with Wireless Electrical Grid LANs (WiGL pronounced “wiggle”), we demonstrate patented Ad-hoc mesh networking method(s) to provide wireless recharging at over 5 feet from the source, while allowing significant lateral movement of the receiver on the WiGL (Wireless Grid LAN or local area network). The transmitter network method leverages a series of panels, operating as a mesh of transmitters that can be miniaturized or hidden in walls or furniture for an ergonomic use. This disruptive technology holds the unique advantage of being able to provide recharging of moving targets similar to the cellular concept used in WiLAN, as opposed to prior wireless charging attempts, which only allow a hotspot-based charging. Specifically, we demonstrate the charging of a popular smartphone using the proposed system in the radiating near field zone of the transmitter antennas, while the user is free to move in the space on the meshed network. The averaged received power of 10 dBm is demonstrated using 1W RF-transmitter(s), operating in the 2.4 GHz ISM band. The proposed hardware consists of antennas arrays, rectennas, power management and USB 2.0 interfaces for maintaining a voltage between 4.2 and 5.3 V and smooth charging. We also show extending the wireless grid coverage with the use of multiple transmitting antennas, and mechanical beam-steering even further an increased coverage using the proposed system.

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An Ergonomic Wireless Charging System for Integration With Daily Life Activities

Cited by 21 publications

References 32 publications

An empirical investigation into the altering health perspectives in the internet of health things

An empirical investigation into the altering health perspectives in the internet of health things

A Wearable All-Printed Textile-Based 6.78 MHz 15 W-Output Wireless Power Transfer System and its Screen-Printed Joule Heater Application

Adhoc mobile power connectivity using a wireless power transmission grid

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