Wireless power transfer to moving ornamental robot fish in aquarium

Itoh, Ryuji; Sawahara, Yuichi; Ishizaki, Toshio; Awai, Ikuo

doi:10.1109/gcce.2014.7031277

Cited by 11 publications

(3 citation statements)

References 1 publication

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“…Under these conditions, when the separation between the inner and outer resonators, x, of the dual-spiral resonator is set as 3.5 cm, the resonant frequency of each resonators is 11.4 MHz, and D 2 = 24.4 cm in this paper. Since the dual-spiral resonator is a type of coupled-resonator, it has two modes: odd mode and even mode [27]. In our study, the lowest resonant point mode, f 1 = 10.0 MHz, is referred to as mode 1, and the other resonant point, f 2 = 13.4 MHz, is referred to as mode 2.…”

Section: Configuration Setup For Rc-wpt Systemmentioning

confidence: 94%

Effects of Lossy Mediums for Resonator-Coupled Type Wireless Power Transfer System using Conventional Single- and Dual-Spiral Resonators

Norodin

Nakamura

Hotta

2022

IEICE Trans. Electron.

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To realize a stable and efficient wireless power transfer (WPT) system that can be used in any environment, it is necessary to inspect the influence of environmental interference along the power transmission path of the WPT system. In this paper, attempts have been made to reduce the influence of the medium with a dielectric and conductive loss on the WPT system using spiral resonators for resonator-coupled type wireless power transfer (RC-WPT) system. An important element of the RC-WPT system is the resonators because they improve resonant characteristics by changing the shape or combination of spiral resonators to confine the electric field that mainly causes electrical loss in the system as much as possible inside the resonator. We proposed a novel dual-spiral resonator as a candidate and compared the basic characteristics of the RC-WPT system with conventional single-spiral and dual-spiral resonators. The parametric values of the spiral resonators, such as the quality factors and the coupling coefficients between resonators with and without a lossy medium in the power transmission path, were examined. For the lossy mediums, pure water or tap water filled with acryl bases was used. The maximum transmission efficiency of the RC-WPT system was then observed by tuning the matching condition of the system. Following that, the transmission efficiency of the system with and without lossy medium was investigated. These inspections revealed that the performance of the RC-WPT system with the lossy medium using the modified shape spiral resonator, which is the dual-spiral resonator proposed in our laboratory, outperformed the system using the conventional single-spiral resonator.

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Section: Configuration Setup For Rc-wpt Systemmentioning

confidence: 94%

Effects of Lossy Mediums for Resonator-Coupled Type Wireless Power Transfer System using Conventional Single- and Dual-Spiral Resonators

Norodin

Nakamura

Hotta

2022

IEICE Trans. Electron.

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“…Researchers have also studied the wireless rechargeable capabilities of marine robots, which would increase the practicality of these technologies. Itoh et al [27] and Abdelnour et al [28] investigated the magnetic-resonance-based wireless charging of underwater robots. Phamduy et al [29] studied the docking and autonomous wireless charging of robotic fish, but they did not mention how long the underwater robot could work and how far it could swim without charging.…”

Section: Introductionmentioning

confidence: 99%

A Miniature Robotic Turtle With Target Tracking and Wireless Charging Systems Based on IPMCs

Qiang

Han

et al. 2020

IEEE Access

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State-of-the-art autonomous micro-robotic turtles suffer from various limitations, such as power restrictions that minimize their deployment times. In this paper, an Ionic Polymer Metal Composite (IPMC) actuator-based centimeter-level biomimetic underwater robot was designed and developed as a robotic turtle with self-charging capabilities to overcome such limitations. It could move forward and make turns driven by five IPMCs on the water. The underwater charging station was able to transmit wideband ultrasonic and electromagnetic fields for electromagnetic induction charging. An ultrasonic communication system with one ultrasonic transmitter and two ultrasonic receivers was first fabricated to implement communication between the underwater station and the biomimetic underwater robot for autonomous tracking and rechargeable capabilities. Experiments were carried out to confirm the operation of the biomimetic underwater robot, which verified the centimeter-level rechargeable capabilities and autonomous target tracking features. The micro-robot demonstrated a self-tracking radial displacement error of approximately 6 mm and a charging reliability rate of more than 73%.

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“…The sensors can get 180 mW power from a 100 kHz UWPT system at a 1 mm coil gap. UWPT systems for power deliver to robot goldfish are reported in [3] working at 1.06 MHz and the robot goldfish can swim freely in a 40 × 25.5 × 28 cm tank. A UWPT system for power deliver to autonomous underwater lamprey‐like robots is reported in [4].…”

Section: Introductionmentioning

confidence: 99%

Analysis and experimental results of frequency splitting of underwater wireless power transfer

Niu

Chu

2017

J. eng.

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Wireless power transfer to moving ornamental robot fish in aquarium

Cited by 11 publications

References 1 publication

Effects of Lossy Mediums for Resonator-Coupled Type Wireless Power Transfer System using Conventional Single- and Dual-Spiral Resonators

Effects of Lossy Mediums for Resonator-Coupled Type Wireless Power Transfer System using Conventional Single- and Dual-Spiral Resonators

A Miniature Robotic Turtle With Target Tracking and Wireless Charging Systems Based on IPMCs

Analysis and experimental results of frequency splitting of underwater wireless power transfer

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