Directory of Researchers
| FUKUDA Hiroya |  |
| Graduate School of Human Development and Environment / Department of Human Environmental Science | |
| Associate Professor | |
| Electro-Communication Engineering |
Researcher Profile and Settings
Affiliation
＜Faculty / Graduate School / Others＞
Graduate School of Human Development and Environment / Department of Human Environmental Science＜Related Faculty / Graduate School / Others＞
Faculty of Global Human Sciences / Department of Environment and Sustainability, Faculty of Human Development / Department of Human Environmental Science
Teaching
- Faculty of Global Human Sciences, 2021, Introducton to Environment and Sustainability Studies 1
- Faculty of Global Human Sciences, 2021, Appliance for Human Life Environment
- Faculty of Global Human Sciences, 2021, Seminar on Environmental Practices 1
- Faculty of Global Human Sciences, 2021, Graduation Thesis
- Faculty of Global Human Sciences, 2021, Experiments for Estimation on Environmental Research C
- Faculty of Global Human Sciences, 2021, Seminar on Environmental Practices 2
- Faculty of Global Human Sciences, 2021, Smart Sensing and Human Life Science
- Faculty of Global Human Sciences, 2021, Seminar on Environmental Practices 3
- Faculty of Global Human Sciences, 2021, Experiments for Estimation on Environmental Research D
- Faculty of Global Human Sciences, 2021, Seminar on Environmental Practices 4
- Office for the Promotion of International Exchange, 2021, Elementary Physics Laboratory
- Office for the Promotion of International Exchange, 2021, Physics Laboratory
- Graduate School of Human Development and Environment / Department of Human Environmental Science, 2021, Topics in Electronic Devices and Energy Equipments I-A
- Graduate School of Human Development and Environment / Department of Human Environmental Science, 2021, Seminar on Electronic Devices and Energy Equipments A
- Graduate School of Human Development and Environment / Department of Human Environmental Science, 2021, Independent Studies Ⅰ
- Graduate School of Human Development and Environment / Department of Human Environmental Science, 2021, Independent Studies Ⅱ
- Graduate School of Human Development and Environment / Department of Human Environmental Science, 2021, Topics in Electronic Devices and Energy Equipments I-B
- Graduate School of Human Development and Environment / Department of Human Environmental Science, 2021, Seminar on Electronic Devices and Energy Equipments B
- Graduate School of Human Development and Environment / Department of Human Environmental Science, 2021, Topics in Electronic Devices and Energy Equipments II-A
- Graduate School of Human Development and Environment / Department of Human Environmental Science, 2021, Topics in Electronic Devices and Energy Equipments II-B
- Faculty of Human Development, 2021, Graduation Thesis
Research Activities
Research Interests
Research Areas
Published Papers
- Last, Jan. 2021, IEICE TRANSACTIONS ON COMMUNICATIONS, J104-A (1), 1 - 2, JapaneseNonlinear Discrimination Using Multi-Layered Hyperplanes
[Refereed]
Scientific journal
- Last, Sep. 2020, 神戸大学大学院人間発達環境学研究科研究紀要, 14 (1), 139 - 141, Japanese超平面を用いたDeep Learning情報処理過程の解析とシグナルフロー線図による表現
Research institution
- Apr. 2019, 電気学会論文誌, 139-E (4), 85 - 86, JapaneseDetection of Swallowing Movement Using Pressure Sensor
[Refereed]
Scientific journal
Measurement of bio-information and prevention of fall from bed are needed for elderly person during sleep. In this paper, the authors propose a novel system for these purposes using game machine. Respiration signal can be detected by fluctuation of load value from body motion. Possibility of fall from bed can be easily discriminated from movement and distribution of load value. From experimental results, proposed system was worked well for the purpose of watching elderly person.
Institute of Electrical Engineers of Japan, 2018, IEEJ Transactions on Electronics, Information and Systems, 138 (5), 635 - 636, Japanese[Refereed]
Scientific journal
Force plates and treadmills are commonly used to measure the ground reaction force (GRF) and center of pressure (COP) of walking. However, the location and condition of measurement are confined when using force plates and treadmills. To address this issue, we have developed a wearable insole-type force sensor for estimating GRF. In this study, we conducted COP measurements using the insole-type force sensor. The insoletype force sensor is equipped with an array of thin-film force sensors. The arrangement of thin-film force sensors is determined according to the subjectʼs plantar pressure distribution while in a static and upright position, captured on pressure-sensitive paper. To measure plantar pressure changes in the longitudinal direction, sensors are placed in two-by-two fashion on the heel, metacarpophalangeal joint, and big toe areas. In addition, five sensors are placed for measuring changes in the horizontal direction. The total number of sensors used is smaller than that used in similar insole-type sensor. COP were estimated in five male subjects (age: 22.6 ± 1.5 years). Each subject wore the insole-type force sensor on the left foot. The measurements were made with the subject was standing on one leg or walking on the force plate. The COP trajectory calculated from the thin-film force sensor output was corrected for the inherent trajectory of the force plate using multiple regression analysis. In all subjects, the measured and estimated COP trajectories were within 10 mm of each other after correction. The insole-type sensor allows easy measurement of COP while walking naturally.
Japan Soc. of Med. Electronics and Biol. Engineering, 2016, Transactions of Japanese Society for Medical and Biological Engineering, 54 (1), 15 - 21, Japanese[Refereed]
Scientific journal
Wearable technology for measuring biomedical signal and momentum has been advanced for the purpose of physiological monitoring system during daily life. In measuring ground reaction force, a method to estimate plantar pressure from output of compact force sensors on the underside of footwear has been used. However, compact sensors used in this method are expensive, it is hard to use these sensors in daily monitoring of sports activity and rehabilitation. In this paper, the authors adopted low-priced film force sensors instead of the compact force sensors, and measured load on plantar and made it possible to estimate vertical ground reaction force in walking. In addition, the authors confirmed that this monitoring system can be used in different pace and footwear.
2014, Transactions of Japanese Society for Medical and Biological Engineering, 52 (2), 108 - 112, Japanese[Refereed]
Scientific journal
- Feb. 2011, 生体医工学, 4 (1), 245 - 249, JapanesePerformance Evaluation of Thin-Film Force Sensor and Its Application to Plantar Pressure Measurement
[Refereed]
Scientific journal
- Aug. 2003, 電気学会論文誌, 123-D・8, 894-902, JapaneseDesign Method of Digital Optimal Control Scheme and Multiple Paralleled Bridge Type Current Amplifier for Generating Gradient Magnetic Fields in MRI Systems
[Refereed]
Scientific journal
- Mar. 2003, 電気学会論文誌, 123-D・3, 188-195, JapaneseTwo-Paralleled Bridge Type High Frequency PWM Chopper with Multi-Loop Current Feedback Tracking Scheme for Gradient Magnetic Field Controller
[Refereed]
Scientific journal
In recent years, MRI (Magnetic Resonance Imaging) systems have been actually requested to diagnose the moving parts of a human body such as the heart or the blood in angiography, where images should be taken in milliseconds instead of minutes. The gradient power supplies which are small but vital components for advanced MRI require higher output power capability as well as faster rise/fall dynamic response characteristics under a variety of specified current reference signals. This paper presents a novel switch-mode gradient power amplifier using IGBTs which is connected in parallel with the conventional 4-switch full-bridge power conversion circuits at their inputs/outputs in order to realize further high-power density. To satisfy the design specifications which require minimized the ripple and improved the rise/fall dynamic response characteristics of the current in the gradient coil, a unique digital control scheme on the basis of optimal preview type-1 servo system is proposed and described in detail. The above effectiveness is discussed and evaluated through the computer-aided analysis. It is expected that the proposed techniques will highly enlarge the diagnostic target and improve the image quality of ultrahigh-speed scanning MRI. © 2003, The Institute of Electrical Engineers of Japan. All rights reserved.
2003, IEEJ Transactions on Electronics, Information and Systems, 123 (11), 1944 - 1950, English[Refereed]
Scientific journal
- Sep. 2002, 神戸大学発達科学部研究紀要, ,, JapaneseFundamental Study on Piezoelectric Film Sensor for the Detection of Decubital Movement
[Refereed]
Scientific journal
- Parallel operation of four-switch full-bridge power amplifiers and a unique digital control scheme for advanced magnetic resonance imaging
In recent years, magnetic resonance imaging (MRI) systems have been in demand to diagnose moving parts in the human body such as the heart or the blood in angiography, where images should be taken in milliseconds instead of minutes. Gradient power amplifiers, which are small but vital components for advanced MRI, require higher output power capacity as well as faster rise/fall dynamic response characteristics under a variety of specified current reference signals. This paper presents a novel switch-mode gradient power amplifier using IGBTs which are connected in parallel to a conventional four-switch full-bridge power conversion circuit at their inputs/outputs in order to realize a higher power density. To satisfy the design specifications, which require minimized tipple and improved rise/fall dynamic response characteristics of the current in the gradient coil, a unique digital control scheme based on an optimal type 1 servo system is proposed and described in detail. The effectiveness of the above is discussed and evaluated through computer-aided analysis. It is expected that the proposed techniques will greatly expand the diagnostic targets and improve the image quality of MRI. (C) 2000 Scripta Technica, Electr Eng Jpn.
SCRIPTA TECHNICA-JOHN WILEY & SONS, Jul. 2000, ELECTRICAL ENGINEERING IN JAPAN, 132 (1), 64 - 72, English[Refereed]
Scientific journal
- Jul. 1998, 電気学会論文誌, 118-C・7/8, 1034-1041, JapaneseParallel Operation of 4-Switch Full-Bridge Power Amplifiers and A Unique Digital Control Scheme for Advanced Magnetic Resonance Imaging
[Refereed]
Scientific journal
- Apr. 1998, Proceedings of PCIM (International Conference and Exhibition on Power Conversion and Intelligent Motion), , 301-306, EnglishDSP-Based Precision Current Tracking Control System for Two-Paralleled PWM Amplifiers in MRI Systems
[Refereed]
International conference proceedings
- DSP-based high precision current tracking control of Gradient Coil in two-paralleled PWM amplifiers for MRI systems
This paper presents a two-paralleled PWM amplifier using switch-mode power current tracking technique in order to generate a gradient magnetic field in the Magnetic Resonance Imaging (MRI) system. This circuit has 8-IGBTs at their inputs/outputs so as to realize further high-power density. A digital control scheme can minimize the current ripple and improve its control response in the Gradient Coils (GCs). It is proved that the proposed technique will highly enlarge the diagnostic target and improve the image quality of MRI.
IEEE, 1998, PESC 98 RECORD - 29TH ANNUAL IEEE POWER ELECTRONICS SPECIALISTS CONFERENCE, VOLS 1 AND 2, , 916-921, 916 - 921, English[Refereed]
International conference proceedings
- Mar. 1997, 博士論文（神戸大学）, , 全71p, JapaneseApplication of High-Frequency Switching Power Supply to Medical Imaging Machines and Its Digital Control Scheme
[Refereed]
Scientific journal
- Nov. 1996, 電気学会論文誌, 116-C・11, 1267-1275, JapaneseApplication of Repetitive Learning Control Scheme to Phase-shifted PWM Resonant DC-DC Converter
[Refereed]
Scientific journal
- Sep. 1996, Proceedings of IEE-PEVD (International Conference on Power Electronics and Variable-Speed Drives), , 366-371, EnglishA Unique Digital Control Scheme of Multiple Bridges Power Conversion Circuit for Advanced Magnetic Resonance Imaging
[Refereed]
International conference proceedings
- Feb. 1995, Proceedings of IEEE-PEDS (International Conference on Power Electronics and Drive Systems), , 238-245, EnglishHigh-Frequency ZVS PWM Power Amplifier for Magnetic-Field Current Tracking Control Scheme and Its Design Considerations
[Refereed]
International conference proceedings
- Nov. 1994, Memoirs of The Faculty of Engineering, Kobe University, 41, 35-47, EnglishState-Vector Feedback Control-Based Servo Power Amplifier for High-Precision Magnetic-Field Current Tracking
[Refereed]
International conference proceedings
- INST ELECTRICAL ENGINEERS, 1994, FIFTH INTERNATIONAL CONFERENCE ON POWER ELECTRONICS AND VARIABLE-SPEED DRIVES, (399), 211 - 216, EnglishSTATE-VECTOR FEEDBACK 100KHZ CARRIER PWM POWER AMPLIFIER FOR HIGH-PRECISION MAGNETIC-FIELD CURRENT PATTERN TRACKING
[Refereed]
International conference proceedings
- INST ELECTRICAL ENGINEERS, 1994, FIFTH INTERNATIONAL CONFERENCE ON POWER ELECTRONICS AND VARIABLE-SPEED DRIVES, (399), 608 - 613, EnglishADVANCED 3-PHASE ZVS-PWM ACTIVE POWER RECTIFIER WITH NEW RESONANT DC LINK AND ITS DIGITAL CONTROL SCHEME
[Refereed]
International conference proceedings
- ZM COMMUNICATIONS GMBH, 1993, PCIM '93 EUROPE - OFFICIAL PROCEEDINGS OF THE TWENTYSIXTH INTERNATIONAL POWER CONVERSION CONFERENCE, , 487-496, 487 - 496, EnglishSTATE-FEEDBACK CONTROL-BASED 100KHZ CARRIER SWITCHED-MODE PWM POWER CONVERSION AMPLIFIER FOR MAGNETIC-GRADIENT FIELD CURRENT-TRACKING CONTROL
[Refereed]
International conference proceedings
- INST ELECTRICAL ENGINEERS, 1993, FIFTH EUROPEAN CONFERENCE ON POWER ELECTRONICS AND APPLICATIONS, VOL 3, 3, 11-16 (377), 11 - 16, EnglishSTATE-VECTOR FEEDBACK-CONTROL BASED HIGH-FREQUENCY CARRIER PWM POWER CONVERSION AMPLIFIER WITH HIGH-PRECISION MAGNETIC-FIELD CURRENT-TRACKING SCHEME
[Refereed]
International conference proceedings
- INTERTEC INTERNATIONAL, INC, 1993, OFFICIAL PROCEEDINGS OF THE TWENTY-SEVENTH INTERNATIONAL POWER CONVERSION CONFERENCE - PCIM '93, , 154-165, 154 - 165, EnglishSOFT-SWITCHED PWM DC-DC HIGH-POWER CONVERTER WITH QUASI-RESONANT-POLES AND PARASITIC REACTIVE RESONANT COMPONENTS OF HIGH-VOLTAGE TRANSFORMER
[Refereed]
International conference proceedings
- I E E E, 1993, PROCEEDINGS OF THE IECON 93 - INTERNATIONAL CONFERENCE ON INDUSTRIAL ELECTRONICS, CONTROL, AND INSTRUMENTATION, VOLS 1-3, 2, 1105-1110, 1105 - 1110, EnglishSTATE-VECTOR FEEDBACK CONTROL-BASED 100KHZ CARRIER PWM POWER CONDITIONING AMPLIFIER AND ITS HIGH-PRECISION CURRENT-TRACKING SCHEME
[Refereed]
International conference proceedings
- ZM COMMUNICATIONS GMBH, 1993, PCIM '93 EUROPE - OFFICIAL PROCEEDINGS OF THE TWENTYSIXTH INTERNATIONAL POWER CONVERSION CONFERENCE, , 211-216, 487 - 496, EnglishSTATE-FEEDBACK CONTROL-BASED 100KHZ CARRIER SWITCHED-MODE PWM POWER CONVERSION AMPLIFIER FOR MAGNETIC-GRADIENT FIELD CURRENT-TRACKING CONTROL
[Refereed]
International conference proceedings
- Apr. 1992, Proceedings of IEEE-ISPE (International Symposium on Power Electronics), , 148-152, EnglishSuper Low Speed Control for LIM
[Refereed]
International conference proceedings
MISC
Wearable technology for measuring biomedical signal and momentum has been advanced for the purpose of physiological monitoring system during daily life. In measuring ground reaction force with wearable module, compact sensors are used. However, they are expensive. So it's hard to use these sensors daily and easily at the spot of walk rehabilitation. In addition, types of modules attached inside or outside of footwear have problems, the former limits footwear to open one and the later loses footwear original characteristic. In this paper, we adopted durable piezoresistive force sensors and developed wearable Ground Reaction Force Measuring System using wireless communication module.
Japan Soc. of Med. Electronics and Biol. Engineering, 17 Aug. 2014, Transactions of Japanese Society for Medical and Biological Engineering, 52, 31, JapaneseReport scientific journal
Books etc
Presentations
- 日本調理科学会近畿支部第 45 回研究発表会, 01 Dec. 2019, Japanese圧力センサを用いた嚥下動作の検出
Oral presentation
- 電子情報通信学会総合大会 2018 年大会, Mar. 2018, Japanese, 東京電機大学（東京都）, Domestic conference無線通信を利用した気圧センサによる身体活動量の推定
Poster presentation
- 平成 30 電気学会全国大会, Mar. 2018, Japanese, 九州大学（福岡市）, Domestic conference荷重中心の計測による臥床者の体位検出
Oral presentation
- 平成 30 電気学会全国大会, Mar. 2018, Japanese, 九州大学（福岡市）, Domestic conference圧力センサを用いた高齢者の嚥下動作の検出
Oral presentation
- 平成 29 電気学会全国大会, Mar. 2017, Japanese, 富山大学（富山市）, Domestic conference気圧センサによる活動状態の推定
Oral presentation
- 平成 29 電気学会全国大会, Mar. 2017, Japanese, 富山大学（富山市）, Domestic conferenceインソール型フォースセンサによる床反力および足圧中心軌跡の推定
Oral presentation
- 平成 28 年電気学会 電子・情報・システム部門大会, Aug. 2016, Japanese, 神戸大学（神戸市）, Domestic conferenceバランス Wii ボードによる生体情報の計測
Oral presentation
- 生体医工学シンポジウム 2015, Sep. 2015, Japanese, 岡山国際交流センター（岡山市）, Domestic conference歪みゲージを用いた柔軟な一軸剪断力センサに関する検討
Oral presentation
- 生体医工学シンポジウム 2015, Sep. 2015, Japanese, 岡山国際交流センター（岡山市）, Domestic conference圧力センサを用いた姿勢・行動判別法
Oral presentation
- 生体医工学シンポジウム 2015, Sep. 2015, Japanese, 岡山国際交流センター（岡山市）, Domestic conferenceインソール型フォースセンサによる足圧中心軌跡の推定
Oral presentation
- 第 54 回日本生体医工学会大会, May 2015, Japanese, 名古屋国際会議場（名古屋市）, Domestic conference気圧センサによるベッド上の姿勢変化推定
Oral presentation
- 生体医工学シンポジウム 2014, Sep. 2014, Japanese, 東京農工大学（小金井市）, Domestic conference気圧センサの荷重計測システムへの応用
Oral presentation
- 第 53 回日本生体医工学会大会, Jun. 2014, Japanese, 仙台国際センター（仙台市）, Domestic conference薄型フォースセンサと無線通信モジュールを用いた床反力計測システムの開発
Oral presentation
- 第 53 回日本生体医工学会大会, Jun. 2014, Japanese, 仙台国際センター（仙台市）, Domestic conference加速度センサとプレゼンテーションソフトを用いた反応時間計測システムの構築
Oral presentation
- 生体医工学シンポジウム 2013, Sep. 2013, Japanese, 九州大学（福岡市）, Domestic conference動き出しにおける敏捷性評価のための反応時間計測システムの考案
Oral presentation
- 生体医工学シンポジウム 2013, Sep. 2013, Japanese, 九州大学（福岡市）, Domestic conference異なる歩調および履物における床反力推定インソールの性能評価
Oral presentation
- 平成 25 電気学会全国大会, Mar. 2013, Japanese, 名古屋大学（名古屋市）, Domestic conference環境温度の変化に対する植物の生体電位応答
Oral presentation
- 電子情報通信学会総合大会 2013 年大会, Mar. 2013, Japanese, 岐阜大学（岐阜市）, Domestic conference温度変化に対する植物の生体電位応答と気孔動態
Oral presentation
- 生体医工学シンポジウム 2012, Sep. 2012, Japanese, 大阪大学（豊中市）, Domestic conference汎用ピエゾ抵抗フォースセンサを用いた簡易歩行計測システムの考案
Oral presentation
- 生体医工学シンポジウム 2012, Sep. 2012, Japanese, 大阪大学（豊中市）, Domestic conference静止時における握り強さが動き出し反応時間に及ぼす影響
Oral presentation
- 日本生物環境工学会 2012 年大会, Sep. 2012, Japanese, 東京大学（東京都）, Domestic conference温度刺激に対する植物の生体電位応答と気孔動態の観察
Oral presentation
- 第 51 回日本生体医工学会大会, May 2012, Japanese, 福岡国際会議場（福岡市）, Domestic conference歩行分析のための鉛直床反力と 3 軸加速度の無線計測システムの構築
Oral presentation
- 第 32 回バイオメカニズム学術講演会, Nov. 2011, Japanese, 大阪科学技術センター（大阪市）, Domestic conference靴内挿入型の荷重計測デバイスを用いた床反力の推定
Oral presentation
- ジョイント・シンポジウム2011（スポーツ工学とヒューマン・ダイナミクス）, Oct. 2011, Japanese, 京都大学（京都市）, Domestic conference薄型フォースセンサを用いたウェアラブルな足底荷重計測デバイスの評価
Oral presentation
- 生体医工学シンポジウム 2011, Sep. 2011, Japanese, ビッグハット（長野市）, Domestic conference薄型フォースセンサを用いた歩行時の鉛直床反力の推定
Oral presentation
- 第 31 回バイオメカニズム学術講演会, Nov. 2010, Japanese, 静岡, Domestic conference薄型フォースセンサを用いた足底荷重計測インソールの製作
Oral presentation
- 生体医工学シンポジウム 2010, Sep. 2010, Japanese, 北海道, Domestic conferencePerformance Evaluation of Thin-Film Force Sensor and Its Application to Plantar Pressure Measurement
Oral presentation
- ジョイント・シンポジウム2009（スポーツ工学とヒューマン・ダイナミクス）, Dec. 2009, Japanese, 福岡工業大学（福岡市）, Domestic conference足袋を利用した足底荷重計測インソールの製作
Oral presentation
- パワーエレクトロニクス学会161回研究会, Dec. 2005, Japanese, パワーエレクトロニクス学会, 神戸市立工業高等専門学校, Domestic conference高磁場ＭＲＩ用並列多重化スイッチング電源の電流リプル低減法に関する研究
Poster presentation
- 半導体電力変換研究会, Jan. 2005, Japanese, 電気学会, 大阪, 日本, Domestic conferenceMultiple Paralleled 3-Level Inverter Using Digital Preview Optimal Control for Current Ripple Reduction
Oral presentation
- パワーエレクトロニクス学会創設記念大会, Nov. 2004, Japanese, パワーエレクトロニクス学会, 奈良, 日本, Domestic conferenceSwitching Power Supply in Ultrahigh-Speed Scanning MRI for Current Ripple Reduction
Poster presentation
- 平成 15 年電気学会産業応用部門全国大会, Aug. 2003, Japanese, 電気学会, 八王子, 日本, Domestic conferenceMethod of Improving the Transitional Response Characteristics for Gradient Magnetic Field Current in MRI
Oral presentation
- 平成 15 年電気学会全国大会, Mar. 2003, Japanese, 電気学会, 電子情報通信学会, 照明学会, 映像情報メディア学会, 情報処理学会, 仙台, 日本, Domestic conferenceCharacteristics of the Low-Pass Filters for the Multi-paralleled Bridge Type High Frequency PWM Current Amplifier in the MRI Gradient Magnetic Field Current Controller
Oral presentation
- 平成 14 年電気関係学会関西支部連合大会, Nov. 2002, Japanese, 電気学会, 電子情報通信学会, 情報処理学会, 照明学会, 映像情報メディア学会, 日本音響学会, 電気設備学会, 東大阪, 日本, Domestic conferenceMultiple Paralleled Bridges for High-Power Magnetic-Field Current Control and Its Digital Optimal Control
Oral presentation
- 平成 14 年電気・情報関連学会中国支部連合大会, Oct. 2002, Japanese, 電子情報通信学会, 電気学会, 照明学会, 情報処理学会, 映像情報メディア学会, 電気設備学会, 松江, 日本, Domestic conferenceMultiple Paralleled Switching PWM Power Supply for Magnetic-Field Current Tracking and Its Digital Optimal Control Considerations
Oral presentation
- 平成 13 年電気学会全国大会, Mar. 2001, Japanese, 電気学会, 電子情報通信学会, 照明学会, 映像情報メディア学会, 情報処理学会, 名古屋, 日本, Domestic conferenceMultiple Paralleled Switching Power Supply for MRI Gradient Magnetic-Field and Its Digital Optimal Control
Oral presentation
- 平成 11 年電気学会全国大会, Mar. 1999, Japanese, 電気学会, 電子情報通信学会, 照明学会, 映像情報メディア学会, 情報処理学会, 山口, 日本, Domestic conferenceSwitching Power Amplifier System for Gradient Magnetic-Field Current Tracking Control Using Optimal Type-1 Digital Control Scheme
Oral presentation
- 平成 9 年電気関係学会関西支部連合大会, Nov. 1997, Japanese, 電気学会, 電子情報通信学会, 情報処理学会, 照明学会, テレビジョン学会, 日本音響学会, 吹田, 日本, Domestic conferenceHigh-Power Multiple Paralleled Switching Power Supply and Its Digital Control Scheme
Oral presentation
- 電子情報通信学会技術研究会, Feb. 1997, Japanese, 電子情報通信学会, 福岡, 日本, Domestic conferenceGradient Magnetic Field Current Tracking-based Switching Power Supply System with Digital Optimal Regulating Scheme for Medical Use MRI
Oral presentation
- 平成 8 年電気関係学会関西支部連合大会, Nov. 1996, Japanese, 電気学会, 電子情報通信学会, 情報処理学会, 照明学会, テレビジョン学会, 日本音響学会, 草津, 日本, Domestic conferenceParallel Operation of 4-Switch Full-Bridge Power Amplifiers and A Unique Digital Control Scheme for Advanced Magnetic Resonance Imaging
Oral presentation
- 平成 8 年電気・情報関連学会中国支部連合大会, Oct. 1996, Japanese, 電気学会, 電子情報通信学会, 照明学会, テレビジョン学会, 情報処理学会, 鳥取, 日本, Domestic conferenceHigh-Frequency PWM Power Conversion System for MRI Gradient Magnetic Field Generation Using Digital Optimal Control Algorithm
Oral presentation
- 平成 8 年電気学会産業応用部門全国大会, Aug. 1996, Japanese, 電気学会, 仙台, 日本, Domestic conferenceDevelopment of Parallel PWM High-Power Amplifier for MRI System
Oral presentation
- パワーエレクトロニクス研究会, Jun. 1996, Japanese, 電気学会, 神戸, 日本, Domestic conferenceParallel Operation of 4-Switch Full-Bridge Circuits and Unique Digital Control Scheme for Advanced Magnetic Resonance Imaging
Oral presentation
- 平成 7 年電気関係学会関西支部連合大会, Nov. 1995, Japanese, 電気学会, 電子情報通信学会, 情報処理学会, 照明学会, テレビジョン学会, 日本音響学会, 京都, 日本, Domestic conferenceLatest Power Electronics Technologies and A New Direction in Investigation
[Invited]
Invited oral presentation
- 平成 7 年電気関係学会関西支部連合大会, Nov. 1995, Japanese, 電気学会, 電子情報通信学会, 情報処理学会, 照明学会, テレビジョン学会, 日本音響学会, 京都, 日本, Domestic conferenceApplication of Repetitive Learning Control Scheme to Phase-shifted PWM Resonant DC-DC Converter
Oral presentation
- 平成 6 年電気関係学会関西支部連合大会, Nov. 1994, Japanese, 電気学会, 電子情報通信学会, 照明学会, テレビジョン学会, 日本音響学会, 吹田, 日本, Domestic conferenceSoft-Switching PWM Power Conversion Amplifier System for Magnetic-Field Current Tracking Control
Oral presentation
- 平成 6 年電気関係学会関西支部連合大会, Nov. 1994, Japanese, 電気学会, 電子情報通信学会, 照明学会, テレビジョン学会, 日本音響学会, 吹田, 日本, Domestic conferenceApplication of Repetitive Learning Control Scheme to Medical Use Resonant PWM DC-DC Converter System
Oral presentation
- 平成 6 年電気・情報関連学会中国支部連合大会, Oct. 1994, Japanese, 電気学会, 電子情報通信学会, 照明学会, テレビジョン学会, 情報処理学会, 岡山, 日本, Domestic conferenceState Feedback Control System of Soft-Switching PWM Power Conversion Amplifier for Magnetic-Field Current Tracking
Oral presentation
- 平成 6 年電気・情報関連学会中国支部連合大会, Oct. 1994, Japanese, 電気学会, 電子情報通信学会, 照明学会, テレビジョン学会, 情報処理学会, 岡山, 日本, Domestic conferenceApplication of Repetitive Learning Control Scheme to High-Frequency-Linked PWM DC-DC Converter with Transformer Resonant Operation
Oral presentation
- 平成 6 年電気学会産業応用部門全国大会, Aug. 1994, Japanese, 電気学会, 松山, 日本, Domestic conferenceA Novel Type Magnetic-Field Current Tracking Soft-Switching PWM Power Conversion Amplifier and Its State-Feedback Control Scheme
Oral presentation
- 平成 5 年電気学会全国大会, Mar. 1993, Japanese, 電気学会, 電子情報通信学会, 照明学会, テレビジョン学会, 情報処理学会, 熊本, 日本, Domestic conferenceEvaluations of High-Frequency PWM Power Conversion System with State Feedback Control-Based Current Tracking Loops
Oral presentation
- 平成 4 年電気関係学会関西支部連合大会, Nov. 1992, Japanese, 電気学会, 電子情報通信学会, 照明学会, テレビジョン学会, 日本音響学会, 神戸, 日本, Domestic conferenceEvaluations and Design Considerations of High-Frequency Switching PWM Power Conversion Amplifier with State Feedback Control-Based Current Tracking Servo-System
Oral presentation
- 電気学会電子デバイス/半導体電力変換合同研究会, Oct. 1992, Japanese, 電気学会, 長崎, 日本, Domestic conferenceHigh-Frequency Carrier PWM Power Amplifier for Magnetic-Field Current Tracking Control
Oral presentation
- 電子情報通信学会技術研究会, Sep. 1992, Japanese, 電子情報通信学会, 松本, 日本, Domestic conferenceAnalysis and Design of High-Frequency Carrier PWM Power Amplified Conversion System for Magnetic-Field Current Tracking Control
Oral presentation
Association Memberships
Research Projects
- Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research Challenging Research (Exploratory), Challenging Research (Exploratory), Kobe University, Jun. 2019 - Mar. 2022Development of low-cost and disposable smart insole for daily gait analysis
- Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C), Grant-in-Aid for Scientific Research (C), Kyushu Kyoritsu University, Apr. 2018 - Mar. 2021衣類の着用による触覚情報を利用した日常生活動作向上に繋がる方策について
立位時に身体を支えられない程度の力で床面に固定された物へ触れると，触覚入力を通して自身の身体位置や向きの認識が高まり，姿勢動揺が低下する．この現象は「ライトタッチ効果」と呼ばれている．本研究の目的は，ライトタッチ効果を活用し，衣類を介した触覚入力により，日常生活動作向上に繋がる方策を検討することである．そして，当該年度は，ライトタッチ効果のメカニズムについて検討するとともに，衣類を介したライトタッチ効果獲得の可能性について言及することであった． 立位時のライトタッチ効果について，二点弁別閾により評価した指先の触覚感度と姿勢動揺低下度との関係について調べた結果，触覚感度と姿勢動揺低下度との関係は認められなかった．すなわち，ライトタッチ効果における触覚の役割は，触覚を通して自身の動きを把握しているのではなく，触覚を参照点として，それに対する身体各部位の相対的な位置変化を捉えている可能性を示した．そのため，ライトタッチ効果を得るために必要な触角は高度な感度が必要なのではなく，大凡何かに触れていることが把握できる程度で十分なことを示唆している． この結果をふまえ，腰周りに下腿部まで覆われる布を巻き，布に下肢が接触することに対する歩行能力への影響を調べた．その結果，通常歩行に対して，視覚入力を遮断した（目隠し）歩行では，歩幅が大幅に低下するが，布を巻くことによって，歩幅の低下を抑制することが出来た．すなわち，歩行時に下肢への布の接触があることは，脚を運ぶ方向など歩幅感覚の把握に繋がることを示唆している．この結果は，自身の動きが反映されるような布を身に纏うことにより，布との接触から自身の身体位置や向きの知覚が向上し，歩行時の姿勢制御向上に繋がることを示し，着用する衣類の形状によっては，動作の向上・改善に繋がる可能性を示している．
- Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research Grant-in-Aid for Challenging Exploratory Research, Grant-in-Aid for Challenging Exploratory Research, Kobe University, Apr. 2016 - Mar. 2019Development of insole-type wireless measurement system for daily gait analysis
In order to measure in real time the ground reaction force, the center of plantar pressure and the arch of sole, we have developed an inexpensive and simple gait measurement insole system by combining two or more commercially available inexpensive thin-film force sensors. Several mechanical properties, such as compressive load, shear force and bending stress, were made to evaluate the performance of commercially available inexpensive thin-film force sensors and a new designed triaxial shear force sensor. In addition, the estimating results of ground reaction force waveform and trajectory of the center of plantar pressure were verified experimentally over different footwear and walking pace on a group of subjects. It will be expected that the research results have been contributed to sports instruction and walking rehabilitation in the field.
- Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C), Grant-in-Aid for Scientific Research (C), Kobe University, Apr. 2014 - Mar. 2017Development of strength index of human bones by using natural frequencies of bones and measurement equipment for evaluating muscle load
In order to make mechanical indexes for evaluating the quality and strength of human bones, sectional modulus of cortical bones against bending moment and muscle at forearm were analyzed through CT (computed tomography) images. The aging characteristics of women aged 50 to 82 were investigated. The ratio of cross section of muscle to bone and the strength index by using natural frequency of forearm bones corresponding to Young’s modulus were calculated. These indexes showed the tendency to decrease with aging similarly to the bone mineral density. Effective arrangement of sensors and bending properties of thin piezoelectric films were investigated and then the usage as an equipment for measuring and revealing the load relationship between bones and muscle was ascertained.
- Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research Grant-in-Aid for Challenging Exploratory Research, Grant-in-Aid for Challenging Exploratory Research, Kobe University, Apr. 2013 - Mar. 2016Development of ground reaction force measuring insole and inexpensive wireless measurement system for gait analysis
In order to easily and quantitatively evaluate the gait in walking rehabilitation, we have developed a reaction force measuring insole and inexpensive wireless measurement system for gait analysis. Several mechanical properties, such as compressive load, shear force and bending stress, were made to evaluate the performance of commercially available inexpensive thin-film force sensors and a new designed uniaxial shear force sensor. As a result, the accuracy for estimating and considerations upon implementation in force measurement for various daily body activities were revealed. In addition, the estimating results of ground reaction force waveform were verified experimentally over different footwear and walking pace on a group of subjects. It will be expected that a simple and inexpensive system to evaluate daily gait has been developed.
- Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C), Grant-in-Aid for Scientific Research (C), Kobe University, 2011 - 2013Development of strength index of human bones by using natural frequencies of bones and evaluation of muscle forces
In order to evaluate the quality and strength of human bones, cross sectional areas of bones and muscles of forearm were calculated from computed tomography (CT) image analysis. Then mechanical indexes involving the effect of muscle forces were proposed and the aging porperty was investigated. For comparison the bone mineral density and the strength index by using natural frequency of forearm bones corresponding to Young's modulus were calculated. The proposed indexes with respect to bending and compression showed the tendency to decrease with aging similarly to the bone mineral density and the strength index. Bending and compression properties of thin films of sensors were investigated for revealing the loading relationship between bones and muscle force and measuring those forces, and then the usage as a force sensor was ascertained.
- Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C), Grant-in-Aid for Scientific Research (C), Kobe University, 2004 - 2006Research on evaluation of bone strength using a natural frequency and biomechanical characteristics of forearm
Concerning evaluating the strength and quality of human bones, we proposed some indexes by the measurement of natural frequencies of forearms and bone mineral densities and then investigated these aging characteristics for female over age 50. Bone mineral densities were measured by pQCT method at both 4% and 20% distal sites of radii and the CT images were analyzed. Results of the present research were as follows: 1. Aging characteristics of total bone density and cortical density at the 20% distal site were compared with those of bone densities at the 4% distal site. It was found that the ratio of total bone density at the 20% site to that at the 4% site was about twice for any age group and the decrease rate of cortical density at the 20% site was smaller than that of total bone densities. 2. Concerning the influence of muscles on bones, the sectional areas of muscles and bones were analyzed from CT images at the 20% site. A method for obtaining the muscle area without fat regions was proposed and the ratio of bone areas to muscle areas (B/M ratio) was used as an index for this purpose. 3. For subjects with the measurement of natural frequencies bone strength indexes of three kinds corresponding to the Young's modulus were calculated and these aging characteristics were investigated. The bone strength index using the total bone density at the 4% site is considered to be most available. The decrease rate of the bone strength index for aging is more remarkable than that of bone mineral densities and B/M ratio. It is found that bone mineral densities and the bone area decrease earlier than bone strength indexes and the muscle area.