研究者詳細 - 神田　岳文

論文 - 神田　岳文

分割表示 118 件中 1 - 20 件目／全件表示 >>

Length Estimation of Pneumatic Artificial Muscle with Optical Fiber Sensor Using Machine Learning 査読

Yilei Ni, Shuichi Wakimoto, Weihang Tian, Yuichiro Toda, Takefumi Kanda, Daisuke Yamaguchi

Sensors 25 ( 7 ) 2221 - 2221 2025年4月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：MDPI AG

A McKibben artificial muscle is a soft actuator driven by air pressure, characterized by its flexibility, lightweight design, and high power-to-weight ratio. We have developed a smart artificial muscle that is capable of sensing its motion. To enable this sensing function, an optical fiber was integrated into the sleeve consisting of multiple fibers and serving as a component of the McKibben artificial muscle. By measuring the macrobending loss of the optical fiber, the length of the smart artificial muscle is expected to be estimated. However, experimental results indicated that the sensor’s characteristics depend not only on the length but also on the load and the applied air pressure. This dependency arises because the stress applied to the optical fiber increases, causing microbending loss. In this study, we employed a machine learning model, primarily composed of Long Short-Term Memory (LSTM) neural networks, to estimate the length of the smart artificial muscle. The experimental results demonstrate that the length estimation obtained through machine learning exhibits a smaller error. This suggests that machine learning is a feasible approach to enhancing the length measurement accuracy of the smart artificial muscle.

DOI： 10.3390/s25072221

researchmap

Study on Noncontact Driving of Disk by Piezoelectric Transducer under Cryogenic Condition 査読

Takefumi Kanda, Koa Yasuda, Takumi Nishida, Kazuki Kubo, Daisuke Yamaguchi, Shuichi Wakimoto

2024 IEEE Ultrasonics, Ferroelectrics, and Frequency Control Joint Symposium 8380(1) - 8380(3) 2024年11月

A Flow Control Valve using Piezoelectric Vibrator for Hydraulic Soft Actuators 査読

Takefumi Kanda, Kou Hashimoto, Yuma Mizokuchi, Yusuke Ota, Shuichi Wakimoto, Daisuke Yamaguchi, Koichi Suzumori, Hiroyuki Nabae

ACTUATOR 2024 International Conference and Exhibition on New Actuator Systems and Applications 182 - 183 2024年6月

ナノ粒子生成システムにおける液滴の温度制御条件の検討査読

岡本幸樹, 神田岳文, 河本尚樹, 藤本望夢, 脇元修一, 山口大介, 阪田祐作, 妹尾典久, 中崎義晃, 音山貴史

電気学会論文誌Ｅ（センサ・マイクロマシン部門誌） 144 ( 6 ) 141 - 148 2024年6月

Development of a smart artificial muscle using optical fibres 査読

Weihang Tian, Shuichi Wakimoto, Daisuke Yamaguchi, Takefumi Kanda

Smart Materials and Structures 33 ( 5 ) 055047 - 055047 2024年4月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：IOP Publishing

Abstract

A McKibben artificial muscle is a fluid-driven soft actuator comprising sleeve fibres and rubber tube. However, as typical bulky and rigid displacement sensors are unsuitable as sensor elements in soft actuators, displacement sensing is challenging for the McKibben artificial muscle. Therefore, we propose an optical fibre-based smart artificial muscle (OSAM) to estimate self-displacement from the bending loss of the optical fibre used as the sleeve fibre. The optical fibre can be effortlessly integrated into the OSAM sleeve using a braiding machine, which is generally used for manufacturing strings, easing the mass production process. The radius of curvature of the optical fibre changed when the OSAM was driven. The displacement of the artificial muscle was estimated based on the sensor output. To demonstrate the usefulness of OSAM, displacement feedback control experiments were conducted using the optical fibre sensor integrated into OSAM. From the results, OSAM’s displacement showed a good response to the target displacement. Therefore, the developed artificial muscle can facilitate displacement feedback control without requiring external sensors, which in turn can improve the performance of rehabilitation and wearable devices.

DOI： 10.1088/1361-665x/ad3ec9

researchmap

その他リンク： https://iopscience.iop.org/article/10.1088/1361-665X/ad3ec9/pdf

Fabrication Process for Twisting Artificial Muscles by Utilizing Braiding Technology and Water-Soluble Fibers 査読

Weihang Tian, Shuichi Wakimoto, Daisuke Yamaguchi, Takefumi Kanda

IEEE Robotics and Automation Letters 9 ( 4 ) 3147 - 3154 2024年4月

Texturing to Dramatically Increase Thermal Deformation of Bilayer Film and Application to Actuator 査読

Daisuke Yamaguchi, Yuki Takahara, Shuichi Wakimoto, Takefumi Kanda

IEEJ Transactions on Electrical and Electronic Engineering 19 ( 5 ) 882 - 887 2024年3月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Wiley

The effect of adding texture to increase the deformation of a bilayer actuator by a factor of over 100 was demonstrated. A bilayer actuator is driven by the difference in thermal deformation. Therefore, two films or plates with a large difference in thermal expansion coefficient are required. The newly developed textured film actuator (TFA) obtained large deformation even in a case involving a combination of two films with a small difference in thermal expansion coefficient. The TFA was fabricated by transferring the texture when laminating two PI films with different coefficients of thermal expansion. A TFA with thin‐film electrodes was heated by applying electric power. Thereby, it unfolded from a curled state. The maximum generated force and curvature of the TFA were 7.4 mN and 0.19 mm⁻¹, respectively, at 0.38 W. The manufacturing process for the TFA is simple and convenient, as it does not require adhesives or special materials. In thermal drive bilayer actuator fabrication, the range of material selection is expanded substantially. In addition, large deformations are generated with less energy. Therefore, the energy consumption is likely to be reduced. © 2024 Institute of Electrical Engineer of Japan and Wiley Periodicals LLC.

DOI： 10.1002/tee.24056

researchmap

A Microchannel Device for Droplet Classification by Manipulation Using Piezoelectric Vibrator 査読

Ao Fujioka, Shoko Seo, Takefumi Kanda, Shuichi Wakimoto, Daisuke Yamaguchi

Actuators 13 ( 3 ) 95 - 95 2024年2月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：MDPI AG

Emulsion formulations should be monodispersed in terms of their stability. Therefore, there is a need for a device that can classify droplets of the desired size from polydispersed emulsions in a fluidized bed manufacturing system. In the previous study, we evaluated the fabrication of a droplet manipulation device using acoustic radiation forces through simulation using the finite element method. In this study, particle manipulation experiments using 1, 6, and 10 µm polystyrene particles were first estimated and evaluated in comparison with their theoretical particle behavior. Based on the results we obtained, the driving conditions and droplet behavior were derived, and the droplet manipulation device using ultrasonic waves to shrink monodisperse emulsions was evaluated. As a result, the droplet classification effect in the microchannel was confirmed to be consistent with the droplet behavior prediction, and the microchannel structure with a constriction component improved its classification effect.

DOI： 10.3390/act13030095

researchmap

Evaluation of transducer for cryogenic actuators by equivalent circuit model 査読

Kazuki Kubo, Kairi Yagi, Takefumi Kanda, Koa Yasuda, Daisuke Yamaguchi, Shuichi Wakimoto

Japanese Journal of Applied Physics 63 ( 3 ) 03SP03 - 03SP03 2024年2月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：IOP Publishing

Abstract

Cryogenic environments are increasingly used in scientific and industrial fields. Recently, cryogenic environments are also used for storage and supply of liquid hydrogen, which is considered essential for the realization of a decarbonized society. Actuators to drive a valve that controls such a low-temperature fluid are required. In this study, a piezoelectric transducer that can be driven in the cryogenic environment has been fabricated and evaluated. Although the performance of piezoelectric elements degrades at cryogenic temperatures in general, the application of a preload can suppress the degradation of performance. Equivalent circuits were used for evaluation, and force factors and figures of merit were compared. As a result, the force factor was as high as that at RT even at cryogenic temperatures, and a high figure of merit was obtained. The result indicates that the transducer can be used for the driving of micro actuator at cryogenic temperature.

DOI： 10.35848/1347-4065/ad1e9b

researchmap

その他リンク： https://iopscience.iop.org/article/10.35848/1347-4065/ad1e9b/pdf

A study on MMG sensor using piezoelectric polymer nanofibers by electrospinning 査読

Rintaro Abe, Koa Yasuda, Takefumi Kanda, Shuichi Wakimoto, Hisao Oka

Electronics and Communications in Japan 106 ( 4 ) e12432(1) - e12432(9) 2023年11月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Wiley

Abstract

In the fields of medical and sports science, it is required to evaluate muscle activity qualitatively and quantitatively. Currently, mechanomyogram (MMG) that can reflect the mechanical activity of muscle fibers is attracting attention. The purpose of this study is to develop a sensor that can measure MMG during exercise. In this study, a small and flexible MMG sensor using P(VDF/TrFE), which is a piezoelectric polymer material, spun into nanofibers by the electrospinning method has been fabricated and evaluated. By the fabricated electrospinning equipment and the obtained fabrication conditions of the nanofibers MMG sensor has been fabricated by using piezoelectric polymer fibers. By using nanofiber nonwoven fabric for the sensor element, the flexible sensor has been realized. In a sound wave reception experiment assuming MMG measurement, the P(VDF/TrFE) nonwoven fabric element showed that the element detected the sound pressure. Additionally, MMG during isometric contraction and pedaling motion has been measured using the fabricated sensor. The results show that the proposed sensor is effective for measuring MMG during exercise.

DOI： 10.1002/ecj.12434

researchmap

エレクトロスピニングによる圧電高分子ナノファイバーを用いた筋音センサに関する研究査読

阿部林太郎, 安田項阿, 神田岳文, 脇元修一, 岡久雄

電気学会論文誌 E（センサ・マイクロマシン部門誌） 143 ( 10 ) 313 - 320 2023年10月

Displacement Sensing of an Active String Actuator Using a Step-Index Multimode Optical Fiber Sensor 査読

Weihang Tian, Shuichi Wakimoto, Takefumi Kanda, Daisuke Yamaguchi

Sensors 22 ( 9 ) 3232 - 3232 2022年4月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：MDPI AG

A thin McKibben artificial muscle is a pneumatic actuator with an outer diameter of only 1.8 mm. We fabricated a string-shaped actuator called an “active string actuator,” which achieves a high contractile displacement by accumulating thin McKibben artificial muscles. To control the displacement, the length of the active string actuator should be estimated. However, this is difficult because bulky and rigid sensors are unsuitable for the sensor element of the active string actuator. Therefore, in this study, we propose a new sensing method for estimating the length of an active string actuator. The proposed sensing system is simple and comprises only three components: a step-index multimode optical fiber, a light emitter, and a light receiver. A step-index multimode optical fiber was combined with the active string actuator, and the length was estimated from the change in the amount of light propagating in the optical fiber when the active string actuator was driven. Fundamental experiments were conducted in this study, and the results demonstrated that the optical fiber sensor value changed with the actuator length. This suggests that it is possible to estimate the displacement of an active string actuator using an optical fiber sensor.

DOI： 10.3390/s22093232

researchmap

Core–Shell Droplet Generation Device Using a Flexural Bolt-Clamped Langevin-Type Ultrasonic Transducer 査読

Kentaro Omori, Nozomu Fujimoto, Takefumi Kanda, Shuichi Wakimoto, Norihisa Seno

Actuators 10 ( 3 ) 55(1) - 55(10) 2021年3月

担当区分：責任著者記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：MDPI AG

Droplets with a core–shell structure formed from two immiscible liquids are used in various industrial field owing to their useful physical and chemical characteristics. Efficient generation of uniform core–shell droplets plays an important role in terms of productivity. In this study, monodisperse core-shell droplets were efficiently generated using a flexural bolt-clamped Langevin-type transducer and two micropore plates. Water and silicone oil were used as core and shell phases, respectively, to form core–shell droplets in air. When the applied pressure of the core phase, the applied pressure of the shell phase, and the vibration velocity in the micropore were 200 kPa, 150 kPa, and 8.2 mm/s, respectively, the average diameter and coefficient of variation of the droplets were 207.7 μm and 1.6%, respectively. A production rate of 29,000 core–shell droplets per second was achieved. This result shows that the developed device is effective for generating monodisperse core–shell droplets.

DOI： 10.3390/act10030055

researchmap

圧電高分子を用いた筋音センサの等尺性収縮による評価査読

石塚博章, 柏原斉佳, 神田岳文, 脇元修一, 岡久雄

電気学会論文誌E（センサ・マイクロマシン部門誌） 141 ( 2 ) 44 - 49 2021年2月

A small three-way valve using particle excitation driven by a single piezoelectric transducer for hydraulic actuator 査読

Hikaru Yamamoto, Takefumi Kanda, Shuichi Wakimoto, Yusuke Ota, Hatuto Takami, Koichi Suzumori, Takahiro Ukida, Hiroyuki Nabae

Sensors and Actuators A: Physical 316 112363 - 112363 2020年12月

Active Cloth Fabricated by a Flat String Machine and its Application to a Safe Wheelchair System 査読

Makoto Takada, Shuichi Wakimoto, Takero Oshikawa, Takeji Ueda, Takefumi Kanda

Journal of Robotics and Mechatronics 32 ( 5 ) 1010 - 1018 2020年10月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Fuji Technology Press Ltd.

In this study, a pneumatically contracting active cloth has been developed; its application is proposed for a safe sitting-posture recovery system for wheelchair users to avoid fall-related accidents. The active cloth consists of thin artificial muscles knitted via a flat string machine. The safe wheelchair system is configured with an active cloth and seating pressure sensor. The seating pressure sensor, located on the seating surface of the wheelchair, estimates the inclination of the upper body of the user; when this reaches an angle that is dangerous for falling from the wheelchair, the active cloth contracts to correct the posture of the upper body. In this paper, we clarify the fabrication process and fundamental characteristics of the active cloth and indicate its potential as a mechanical element for welfare apparatuses by demonstrating a safe wheelchair system.

DOI： 10.20965/jrm.2020.p1010

researchmap

Realistic and Highly Functional Pediatric Externally Powered Prosthetic Hand Using Pneumatic Soft Actuators 査読

Hironari Taniguchi, Nobuo Takemoto, Ren Yakami, Shuichi Wakimoto, Takero Oshikawa, Kosuke Morinaga, Takefumi Kanda

Journal of Robotics and Mechatronics 32 ( 5 ) 1034 - 1043 2020年10月

製紐機を用いたインダクタンス型スマート人工筋の製作手法の確立査読

小川草太, 脇元修一, 神田岳文, 大村健人, 安藤克倫

日本フルードパワーシステム学会論文集 51 ( 2 ) 25 - 31 2020年10月

Nanoparticles generation using monodisperse droplets by an ultrasonic transducer 査読

Nozomu Fujimoto, Takefumi Kanda, Masaya Katsuta, Yusaku Sakata, Yoshiaki Yamada, Norihisa Seno, Yoshiaki Nakazaki, Takafumi Otoyama

Electronics and Communications in Japan 103 ( 7 ) 49 - 55 2020年7月

超音波ねじり振動子による単分散液滴を用いたナノ粒子生成査読

藤本望夢, 神田岳文, 勝田将矢, 阪田祐作, 山田嘉昭, 妹尾典久, 中崎義晃, 音山貴史

電気学会論文集E（センサ・マイクロマシン部門誌） 140 ( 2 ) 37 - 42 2020年2月

　前のページ - 次のページ　

<神田 岳文>

論文 - 神田 岳文

<神田　岳文>

論文 - 神田　岳文