Faculty Profiles - KANDA Takefumi

Presentations -

Division display 161 - 180 of about 898 ／ All the affair displays >>

1A2-N05 Miniaturization of bolt-clamped Langevin-type transducer for droplet generation(Nano/Micro Fluid System)

MORI Kota, KISHI Toru, KANDA Takefumi, SUZUMORI Koichi

2013.5.22 The Japan Society of Mechanical Engineers

Event date： 2013.5.22

Language：Japanese

In many fields, such as electronic material, medicine and cosmetics production, it is an important proposition to generate small and uniform droplets of various liquids. In order to realize these droplets' generation, a bolt-clamped Langevin-type transducer and a micropore plate has been used. The purpose of this study is to fabricate a bolt-clamped Langevin-type transducer having small and simple structure in comparison with the previous one, and to generate droplets by using this device. First, by using a new fixation method, we have designed a bolt-clamped Langevin-type transducer whose structure is suitable for miniaturization. Next, we have generated and evaluated droplets in the air by using pure water. When the micro pore diameter, the applied air pressure and the resonance frequency were 50μm, 30kPa and 37kHz, the average diameter of pure water droplets and standard deviation of diameter were 96.1μm and 0.98, respectively.

1P1-O02 Cavitation detection sensor in the micro channel using the piezoelectric polymer(MEMS and Nano-Technology)

YABUMOTO Masaki, KANDA Takefumi, SUZUMORI Koichi

2013.5.22 The Japan Society of Mechanical Engineers

Event date： 2013.5.22

Language：Japanese

In this research a small sensor which can detect cavitation in a microchannel has been fabricated using piezoelectric polymer thin film. P(VDF/TrFE) was used as the sensor material. We have applied integration technology of photolithography to miniaturize sensors. As a result, we have succeeded in fabricating micro-sensor whose thickness is 167μm. In this study, we introduce the details of the process in the fabrication sensor.

2A2-D10 Flow Metering Valve for Pneumatic Actuators Using Particle Excitation by PZT Vibrator : 9th report Confirm the optimization vibration condition for drive(Mechanism and Control for Actuator (2))

HIROOKA Daisuke, SUZUMORI Koichi, KANDA Takefumi

2013.5.22 The Japan Society of Mechanical Engineers

Event date： 2013.5.22

Language：Japanese

The purpose of this study is development of the high efficiency pneumatic system using small flow control valve. The control valve has small size, lightweight and can control air flow continuously. We aim at the precise flow control. In this repot, we report the vibrational condition for precise flow control. We discovered two high efficiency vibrational modes by the finite element method. We have measured vibrational condition and flow rate characteristics. From these result, we conclude that the tolerance of air pressure is most important parameter at optimum vibrational condition.

2A1-D04 Improvement of the waveguide pattern for light driven SMA actuator(Mechanism and Control for Actuator (1))

USAKI Keita, ASHIDA Yuichi, KANDA Takefumi, SUZUMORI Koichi

2013.5.22 The Japan Society of Mechanical Engineers

Event date： 2013.5.22

Language：Japanese

The purpose of this research is the improvement of driving performance and the downsizing of a light driven SMA actuator. The actuator consists of a substrate, an optical waveguide and SMA wires. The drive part of the SMA actuator is 15 X 1 [mm]. In this paper, the SMA wires are glued on the substrate. As a result, the thickness of the SMA actuator was reduced from 0.5 mm to 0.2 mm. In addition, an absorption film was patterned on the substrate by a YVO4 laser. This is because the SMA actuator was heated effectively. The effect of the pattern was evaluated empirically.

2P1-D06 Piezoelectric polymer flexible displacement sensor for soft actuators(Mechanism and Control for Actuator(3))

ICHIKAWA Tatsuya, KANDA Takefumi, SUZUMORI Koichi, WAKIMOTO Shuichi, YAMAMOTO Yhota

2012.5.27 The Japan Society of Mechanical Engineers

Event date： 2012.5.27

Language：Japanese

This research aims to realize a flexible displacement detection sensor that can be attached on flexible soft bellows actuators. The sensor material is piezoelectric polymer: poly(vinylidene fluoride-trifluoroethylene) [P(VDF/TrFE)]. By adjusting temperature and applied voltage in the process of polarization, fabrication conditions were optimized. In addition, the piezoelectric polymer sensor was mounted to the actuator having a bellows structure. A flexible substrate was used as wiring in order to keep flexibility. The actuator is curved by using a negative pressure. As a result, we have confirmed the detection of actuator displacement by the sensor.

2P1-F03 Improvement of a bolt-clamped Langevin Type transducer for a cryogenic ultrasonic motor(Robotics & Mechatronics in Hyper Environment)

KURODA Masataka, YAMAGUCHI Daisuke, TAKEDA Dai, KANDA Takefumi, SUZUMORI Koichi

2012.5.27 The Japan Society of Mechanical Engineers

Event date： 2012.5.27

Language：Japanese

In this study, an ultrasonic motor used in a cryogenic temperature condition has been fabricated and evaluated. To increase the rotation speed compare to a previous cryogenic ultrasonic motor, the bolt-clamped Langevin type transducer was designed. The PZT was placed at the anti-node of the bending vibration. The transducer was designed to have high vibration speed by using a finite element analysis. The diameter and the length of the motor are 22mm and 30.5mm. The rotation speed was 422rpm at 4.5K when the applied voltage was 50V_<p-p>. We have realized three times higher rotation speed than that of the previous motor.

2P1-F01 Evaluation of an ultrasonic motor for solid-state high resolution nuclear magnetic resonance spectrometer(Robotics & Mechatronics in Hyper Environment)

FUJISAWA Kazuya, YAMAGUCHI Daisuke, KANDA Takefumi, SUZUMORI Koichi

2012.5.27 The Japan Society of Mechanical Engineers

Event date： 2012.5.27

Language：Japanese

In this study, an ultrasonic motor for solid-state high resolution nuclear magnetic resonance (NMR) spectrometer has been fabricated and evaluated. The solid-state NMR analysis needs a sample spinning in the high intensity magnetic field. All parts of the motor are made of materials which has low magnetic permeability. The motor consists of two sector shaped vibrators. The diameter and the height of the motor including the sample case are 31 mm and 50 mm. The motor was unaffected by the influence of the magnetic field. The rotation speed was 1200 rpm when the magnetic flux density was 7 T. Additionally, the motor was used for the sample rotation system of NMR spectrometer.

1207 An ultrasonic motor for a cryogenic environment under a high intense magnetic field

TAKEDA Dai, YAMAGUCHI Daisuke, FUJISAWA Kazuya, KANDA Takefumi, SUZUMORI Koichi

The Machine Design and Tribology Division meeting in JSME 2012.4.22 The Japan Society of Mechanical Engineers

Event date： 2012.4.22

Language：Japanese

The aim of this study is to realize an ultrasonic motor which can be driven in a cryogenic temperature environment under a high intense magnetic field. We have fabricated and evaluated the ultrasonic motor made of titanium. The motor's diameter and length are 22 mm and 30.5 mm, respectively. We have succeeded in driving the ultrasonic motor at 4.5 K. The rotation speed was 215 rpm. We have also succeeded in driving the motor under the intense magnetic field of 7 T.

2A2-J09 Flow Metering Valve for Pneumatic Actuators Using Particle Excitation by PZT Vibrator : 7th report Optimization of orifice diameter for continuous flow rate control(Mechanism and Control for Actuator)

HIROOKA Daisuke, SUZUMORI Koichi, KANDA Takefumi

2011.5.26 The Japan Society of Mechanical Engineers

Event date： 2011.5.26

Language：Japanese

The purpose of this study is the development of the valve that can precisely control pneumatic cylinders. The valve that has a lightweight and simple structure and uses piezoelectric oscillator which is driven at resonance mode and it can control flow rate by controlling the amplitude of the particles excitation. We reported this flow control valve principle in the previous paper and concluded the diameter of orifice is an important parameter for flow rate change. In this report, we have designed a new prototype for the purpose of high controllability. We have measured flow rate characteristics and observed particle motion. From these result, we confirmed the conditions necessary for continuous adjustment of flow quantity by experiment.

1P1-A04 Research Project of Soft Fluid Actuator in Okayama University(Robotics & Mechatronics technology and Cooperation with industry in Okayama)

WAKIMOTO Shuichi, SUZUMORI Koichi, NORITSUGU Toshiro, NARUSE Keiji, OKA Hisao, KANDA Takefumi, TAKAIWA Masahiro, SASAKI Daisuke, IRIBE Gentaro, MATSUURA Koji, KITAWAKI Tomoki

2011.5.26 The Japan Society of Mechanical Engineers

Event date： 2011.5.26

Language：Japanese

Research project of "Soft fluid actuator" has been promoted in Okayama University. This project is organized by different field researchers; robotics, mechatoronics, health and medical researchers. Soft fluidic actuators are configured with polymer material and driven by fluid (pneumatic and hydraulic) pressure. Therefore they will have many advantages; high compliance, light weight, low cost and non-electrical drive. Namely they are breakthroughs of the realizations of highly safe mechanisms. In the project, not only fundamental researches of new soft fluid actuators but also applying them to medical and welfare mechanical systems have progressed. In this paper, the concept and purpose, the organization, and some researches of the project are introduced.

1P1-A02 Emulsion Generation based on Microreator Oscillated by Piezoelectric Vibrator(Robotics & Mechatronics technology and Cooperation with industry in Okayama)

KANDA Takefumi, SUZUMORI Koichi, ONO Tsutomu, OGAWARA Ken-ichi, HIGAKI Kazutaka

2011.5.26 The Japan Society of Mechanical Engineers

Event date： 2011.5.26

Language：Japanese

The aim of this paper is to introduce a project for emulsion generation device in Okayama University. We have generated sub-micrometer size droplets by using an ultrasonic vibration and microchannel plates. Especially, the device and system is for the generation of drug droplets. The ultrasonic vibration is oscillated by PZT plates and microchannel plates are made of stainless steel. The distribution of pressure depends on cross sectional pattern of the microchannel. As the applied voltage increased, emulsion became smaller and distribution became sharper. When the vibrator was oscillated in 2.25 MHz, the generated emulsion has an average diameter of 200 nm.

1A2-F10 Driving Performances of the Cryo Ultrasonic Motor Using Bolt-clamped Langevin Type Transducer(Robotics & Mechatronics in Hyper Environment)

YAMAGUCHI Daisuke, KANDA Takefumi, SUZUMORI Koichi

2011.5.26 The Japan Society of Mechanical Engineers

Event date： 2011.5.26

Language：Japanese

In this study, a small ultrasonic motor which is driven at a cryo temperature has been fabricated and evaluated. The motor consists of a bolt-clamped Langevin-type transducer (BLT), a rotor, a bearing, a spring, and a casing. The maximum diameter and the height of the motor are 22mm and 30.5mm. The ultrasonic motor has been evaluated in the room temperature and in the cryo helium gas. The relationship between contact pre-pressure of the rotor to the BLT the continuously rotating temperature is indicated. The rotation speed was 553 rpm at the room temperature and 65.4 rpm at the 4.5K helium gas.

1A2-H06 Improvement of the Ultrasonic Vibration Mixing Device to Deposit PZT Thin Film by Hydrothermal Method(MEMS and Nano-Technology)

NAKAHIRA Daichi, UENO Masahiro, KANDA Takefumi, SUZUMORI Kouichi

2011.5.26 The Japan Society of Mechanical Engineers

Event date： 2011.5.26

Language：Japanese

In this research, an ultrasonic vibration mixing device for the hydrothermal deposition system has been designed. A PZT thin film has been deposited on a titanium plate by the hydrothermal method with the fabricated new ultrasonic vibration mixing device. To improve a stir performance, the ultrasonic vibration mixing device has been designed by using the finite element method. The new vibration mechanism has been evaluated. The pressure of 396[kPa] was generated in the autoclave. This value was about twice larger than that of the vibration mechanism of the previous model. The deposited PZT thin film has been observed by the SEM.

1A2-F09 A Low-Profile Ultrasonic Motor Using Sector Shaped Vibrators for High Magnetic Field(Robotics & Mechatronics in Hyper Environment)

FUJISAWA Kazuya, MAEDA Hiraku, KANDA Takefumi, SUZUMORI Kouichi, TAKEGOSHI Kiyonori, MIZUNO Takashi

2011.5.26 The Japan Society of Mechanical Engineers

Event date： 2011.5.26

Language：Japanese

The purpose of this research is to apply a low-profile ultrasonic motor using sector shaped vibrators for sample spinning of the solid-state nuclear magnetic resonance (NMR) analysis. We have fabricated the motor made of nonmagnetic materials. The transducer consists of two sector shaped vibrators. The maximum diameter of this motor is 17 mm and the height is 41.5 mm. We have evaluated the driving performance of this motor in high magnetic field. As a result, the magnetic field had a small effect on the rotation performance of the motor. Therefore the motor can be used for sample spinning of the solid-state NMR analysis.

1A2-H05 Improvement of the condition of PLZT films by using a hydrothermal method and evaluation of the actuators(MEMS and Nano-Technology)

TONOKAI Akimasa, YAMAGUCHI Daisuke, KANDA Takefumi, SUZUMORI Koichi

2011.5.26 The Japan Society of Mechanical Engineers

Event date： 2011.5.26

Language：Japanese

Photo driven actuators have received an attention in recent years. PLZT has a photostrictive effect and can be driven by non-contact energy supply. In this study, PLZT films have been deposited by using a hydrothermal method. The growth and the condition of crystals would depend on a reactive temperature and an amount of reagent. The depositing condition of PLZT films has been improved and the characteristics of the films have been evaluated. Additionally, PLZT film actuators have been fabricated and those actuators have been driven by the ultraviolet lays. By measuring displacement, electric current and generative force, the PLZT thin film actuators have been evaluated.

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

石塚博章, 柏原斉佳, 神田岳文, 脇元修一, 岡久雄

第36回「センサ・マイクロマシンと応用システム」シンポジウム 2019

柔軟ひずみセンサを用いたウェアラブルインタフェースによる3自由度ソフトマニピュレータの操作

萩原弘貴, 脇元修一, 神田岳文, 古川匠太

日本機械学会2019年度年次大会 2019

インダクタンス変化型変位センサを一体化したスマート人工筋の磁性流体による駆動

小川草太, 脇元修一, 神田岳文, 大村健人

日本機械学会2019年度年次大会 2019

Composote structure of McKibben artificial muscle and optical ficer sensor International conference

Sota KOGAWA, Shuichi WAKIMOTO, Takefumi KANDA, Kento OMURA

International Workshop on Piezoelectric materials and Applications in Actuators 2019 & ENHANCE Workshop (IWPMA2019) 2019

Control of a hydraulic cylinder a particle excitation type three way valve International conference

Hikaru Yamamoto, Takefumi Kanda, Shuichi Wakimoto, Koichi Suzumori, Takahiro Ukida, Hiroyuki Nabae

International Workshop on Piezoelectric Materials and Applications in Actuators 2019 & ENHABCE Workshop (IWPMA2019) 2019

　 PREV - NEXT 　