2.45-GHz Intermittent Wireless Power Transmission System for Batteryless LED Cosmetic Accessories

Nishihashi, Takeshi; Yoshida, Kakunoshin; Kashiyama, Norifumi; Nishikawa, Hisashi; Tanaka, Ami; Douseki, Takakuni

doi:10.1109/wpt.2018.8639082

Cited by 5 publications

(2 citation statements)

References 3 publications

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“…[ 51 ] Additionally, Nishihashi et al have demonstrated a wireless power transmitter for ultra‐small wearable devices, with a proof of concept involving attaching the receiving antenna module to an eyelash. [ 52 ] These advancements highlight the integration of physiological cues with sensor‐based responses, opening up new possibilities for artificial eyelashes. Furthermore, these static sensors hold potential in various applications, including the development of sensitive airborne camera lenses within drone‐assisted camera networks.…”

Section: Resultsmentioning

confidence: 99%

3D‐Printed Artificial Cilia Arrays: A Versatile Tool for Customizable Mechanosensing

et al. 2023

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Bio‐inspired cilium‐based mechanosensors offer a high level of responsiveness, making them suitable for a wide range of industrial, environmental, and biomedical applications. Despite great promise, the development of sensors with multifunctionality, scalability, customizability, and sensing linearity presents challenges due to the complex sensing mechanisms and fabrication methods involved. To this end, high‐aspect‐ratio polycaprolactone/graphene cilia structures with high conductivity, and facile fabrication are employed to address these challenges. For these 3D‐printed structures, an “inter‐cilium contact” sensing mechanism that enables the sensor to function akin to an on‐off switch, significantly enhancing sensitivity and reducing ambiguity in detection, is proposed. The cilia structures exhibit high levels of customizability, including thickness, height, spacing, and arrangement, while maintaining mechanical robustness. The simplicity of the sensor design enables highly sensitive detection in diverse applications, encompassing airflow and water flow monitoring, braille detection, and debris recognition. Overall, the unique conductive cilia‐based sensing mechanism that is proposed brings several advantages, advancing the development of multi‐sensing capabilities and flexible electronic skin applications in smart robotics and human prosthetics.

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Section: Resultsmentioning

confidence: 99%

3D‐Printed Artificial Cilia Arrays: A Versatile Tool for Customizable Mechanosensing

et al. 2023

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“…[1] Using the measured distance, the transmitter emits controlled electromagnetic waves with an electric field strength below that of Japan's national guidelines [2] while maintaining a constant power supply to the target device even if the distance between the human body and the transmitter changes. We also developed an intermittent power transfer system [3][4][5] that increases the distance from the transmitter to the wearable device while maintaining the average transmitted power. The distance is increased by intermittent operation with a peak power that rises in proportion to the reciprocal of the duty cycle.…”

Section: Introductionmentioning

confidence: 99%

Slidable Button-shaped Rectifier Module with LED on Conductive Yarn for Antenna Matching Powered by Microwaves

Nishimura

Tanaka

Otsuka

et al. 2022

Transactions of The Japan Institute of Electronics Packaging

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This paper describes a gamma-matched textile rectenna structure that is suitable for batteryless wearable accessories powered by microwaves using a conductive-yarn antenna. The proposed structure consists of a slidable button-shaped rectifier module with LED that allows the antenna to pass through its metal holes, thus making it possible to connect a soft textile antenna with a hard rectifier module to easily perform impedance matching by sliding the module on the antenna, while watching luminance of the LED light. To verify the effectiveness of our textile rectenna structure, we fabricated a button-shaped rectifier module 7.5 mm in diameter including an LED and a 6-cm-long bundled conductiveyarn antenna consisting of 0.5-mm-thick single yarns. The experimental results showed that, for 2.45-GHz wireless power transmission with an average transmitted power of 1 W, the LED on the rectifier module blinked while dissipating power of 0.355 mW at a distance of 70 cm from the wireless transmitter. We also fabricated a friendship bracelet and a pair of embroidered socks equipped with our rectenna as LED textile accessories.

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A Prototype of a Wireless Power Transmission System Based on Arduino

Habib

Suhan

Tanvir

et al. 2023

Lecture Notes on Data Engineering and Communications Technologies

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2.45-GHz Intermittent Wireless Power Transmission System for Batteryless LED Cosmetic Accessories

Cited by 5 publications

References 3 publications

3D‐Printed Artificial Cilia Arrays: A Versatile Tool for Customizable Mechanosensing

3D‐Printed Artificial Cilia Arrays: A Versatile Tool for Customizable Mechanosensing

Slidable Button-shaped Rectifier Module with LED on Conductive Yarn for Antenna Matching Powered by Microwaves

A Prototype of a Wireless Power Transmission System Based on Arduino

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