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2023 International Conference on Consumer Electronics - Taiwan, ICCE-Taiwan 2023

作者： Kawai, Yasunori Miyazaki, Takato Miyoshi, Takanori National Institute of Technology Ishikawa College Department of Electrical Engineering Ishikawa Japan National Institute of Technology Ishikawa College Advanced Engineering Course Electronic and Mechanical Engineering Course Ishikawa Japan Nagaoka University of Technology Department of System Safety Niigata Japan

ISBN: (纸本)9798350324174

This paper considers a human assistive system of the rehabilitation for lower-limb using the exoskeleton. When the patient feels the fatigue in the rehabilitation, the power assist is needed to continue and to stop safety. First, the proposed power assist equipment using exoskeleton is indicated. The DC motor, the torsion spring, worm wheel, worm gear are used. Next, the control system using PI controller is proposed. The encoder attached to the knee joint is used as the reference value and the encoder attached to the motor is controlled by the motor. Finally, an experiment of repeated flexion and extension of the knee joint is conducted. It is verified that the motor can be controlled to be same angle of the knee angle. Therefore, the power assist by the exoskeleton is useful for the rehabilitation. © 2023 IEEE.

关键词： DC motors

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Deformation in axial compression of aluminum tubular structures with ribs

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Keikinzoku/Journal of Japan Institute of Light Metals 2019年第8期69卷 379-386页

作者： Yokoya, Keisuke Miyazaki, Makoto Tojo, Yusuke Yamashita, Minoru Institute of Technology Nagano College Advanced Course of Production and Environment System National 716 Tokuma Nagano-shi Nagano381-8550 Japan Department of Mechanical Engineering Tokyo Institute of Technology [2-12-1 Ookayama School of Engineering Meguro-ku Tokyo152-8552 Japan Department of Mechanical Engineering National Institute of Technology Nagano Japan DENSO Aircool Corporation Japan Department of Mechanical Engineering Gifu University Japan

Dynamic compression behavior of various kinds of polygonal tubular structures with ribs are investigated. Square hollow structures and that with rib reinforcement of aluminum extrusions are in dynamic axial compression, using a drop hammer. Numerical simulation was also conducted for the wider variety of cross-sectional shapes and reinforcements. The effect of the axial length, cross-sectional shape and reinforcing rib arrangement on the deformation behavior were investigated. Comparable compressive force was obtained when the cross-sectional area of the structure is similar, even if the number of edges in cross-section increases from four (square) to eight. Rib reinforcement is very effective for the improvement of the crush or energy absorbing performance. Deformation behavior was successfully predicted by the numerical simulation. Numerical simulation of the compression of the various polygonal tubular structures with radial ribs was also carried out. The number of radial ribs in cross-section of the polygonal hollow structure has a positive relationship to the deformation constraint at corners and the torsional rigidity, consequently, the crush resistance increased. © 2019 The Japan Institute of Light Metals.

关键词： Reinforcement

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Overview of Research of Rollovers

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Journal of Traffic and Transportation engineering 2015年第1期3卷 1-6页

作者： Toshiaki Sakurai Mechanical Engineering and System Course Iwaki Meisei University Fukushima 970-8551 Japan

This paper describes the research of rollovers of passenger cars and proposes a ramp type test as a typical dynamic rollover test with evaluations of occupant injuries and vehicle deformation in accordance with various parametric functions. Many types of rollover tests have been conducted in the past and they have their merits and demerits. However, the ramp rollover test has a characteristic to evaluate both dummy injuries and vehicle deformations, and to perform tests under many conditions by exchanging ramp dimensions, steer timings made rotation and velocity of the vehicle.

关键词： Rollover roof crush dynamic ramp rollover test FMVSS 216 crashworthiness movement of passengers

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An in vitro stretch-injury model for elongation-controlled neuronal cells: Effect of strains along neurite 15

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15th International Conference on Biomedical engineering, ICBME 2013

作者： Nakadate, H. Aomura, S. Kakuta, A. Graduate School of System Design Tokyo Metropolitan University Tokyo Japan Advanced Course of Mechanical and Computer Systems Engineering Tokyo National College of Technology Tokyo Japan

ISBN: (纸本)9783319029122

Diffuse axonal injury (DAI), a major component of traumatic brain injury, is associated with rapid deformation of brain tissue resulting in the stretching of neural axons. Focal axonal beading, which is the morphological hallmarks of DAI pathology, leads to the disconnection of neurons from tissues, resulting in cell death. Our goal is better understanding of neuronal tolerance and help to predicting the pathogenesis of DAI from mechanical loading to the head. In present study, we developed a stretch-injury model that subjected cultured neuronal cells in which the directions of neurite elongation were controlled with microfluidic culture technique to uniaxial stretch and examined the effect of strains along neurite on the cell damage. Neurites from PC 12 cells were extended at 0, 45 and 90 degrees to stretch direction using a fabricated poly(dimethylsiloxane) (PDMS) piece having microgrooves in combination with PDMS substrate. Following stretch with a strain of 0.22 and a strain rate of 27 s-1, the morphology of same neurites were observed at 5 min–24 h. As a result, the beading along neurites oriented at 0 degree increased immediately following stretch and the increase was sustained until 24 h, although the beading along neurites oriented at 45 and 90 degrees transiently increased within 1 h following stretch. Many rupture of neurites was observed more in neurites oriented at 0 and 90 degrees than in neurites oriented at 45 degrees, however, the retraction and disappearance of neurites did not differ in any orientation conditions. These results suggest that the difference in strain along neurite induces different types and degrees of neurite damage and not strain of cellcultured substrate but strain loaded to neurite is important to evaluation of neuronal injury. © Springer International Publishing Switzerland 2014.

关键词： Microfluidics

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Design of a highly safe model vehicle for rear-end collision avoidance considering multiple faults of sensors

Design of a highly safe model vehicle for rear-end collision...

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CSSim 2009 - 1st International Conference on Computational Intelligence, Modelling, and Simulation

作者： Kasuga, Takeshi Yakubo, Satoshi Department of Electrical Engineering Fukushima National College of Technology Iwaki 970-8034 Japan Advanced Course in Mechanical and Electrical System Engineering Fukushima National College of Technology Iwaki 970-8034 Japan

ISBN: (纸本)9780769537955

This paper presents design of a highly safe driving control system using different kinds of sensors and its evaluation in order to avoid the rear-end collision of the model vehicle. An appropriate combination of different kinds of sensors is introduced to reduce the occurrence of multiple faults. It is shown in the computer solution that the reliability of the combination of different kinds of sensors is higher than that of the combination of the same kind of sensors. Moreover, the systematic design of the model vehicle is proposed, and it is also shown in the experiment that the rear-end collision avoidance can be achieved even if a fault occurs at any sensor. © 2009 IEEE.

关键词： Vehicles

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Highly safe driving control system for model vehicles using different kinds of sensors and one-way wheels

Highly safe driving control system for model vehicles using ...

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2009 9th International Symposium on Communications and Information Technology, ISCIT 2009

ISBN: (纸本)9781424445219

This paper presents a highly safe driving control technique using different kinds of sensors and one-way wheels to avoid the rear-end collision and sudden stop of the model vehicle. The basic concept is "sensor diversity" which enables fault tolerant operations. An appropriate combination of different kinds of sensors is introduced to reduce the occurrence of multiple faults. The systematic design of the model vehicle is presented, and the rear-end collision avoidance can be achieved even if a fault occurs at any sensor. Moreover, if the wheel races even if a fault occurs at any motor and then the rotation of the axle stops, a safe driving can be maintained. The important design concept is that a fault makes linearly additive effect with a small value to the final result. In order to meet the requirement, we introduce one-way wheels instead of usual wheels. It is shown in the experiment of driving control of the model vehicle that rear-end collision can be avoided and then safety operations can be achieved. ©2009 IEEE.

关键词： Signal processing

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Determination of Mung Bean Seed Viability Change in Vacuum Packaging during Storage in Different Temperatures 1

Determination of Mung Bean Seed Viability Change in Vacuum P...

引用

1st International Conference on mechanical Electronic and Biosystem engineering, MEBSE 2018

作者： Faisal, M. Ahmad, U. Wulandani, D. Postharvest Technology Master Course Program Graduate School Bogor Agricultural University Indonesia Dept. of Mechanical and Bio-system Engineering IPB Bogor Agricultural University Indonesia

Mung bean seeds decreased their viability very fast during storage, especially in tropical area without proper packaging. The purpose of this study is to observethe decrease in viability of mung bean seeds during storage and to build a mathematical model for shelf life prediction. Dried mung bean seeds were vacuum packed and stored in Accelerated Shelf-life Testing chamber at five different temperatures of 30° C, 35° C, 40° C, 45° C, 50° C with approximately 80% in relative humidity, to facilitate rapid deterioration with different rate of physical and chemical change in the seed. The results show that there was an increase in moisture content and the germination decreased in different rates. Changes in values for some parametersof the seeds affected the viabilty of the seeds during rapid deterioration. The value of constant (k)for viability decreasing was calculated and used to build the mathematical model for predicting the shelf life of mung bean seeds during storage at any temperature. Using the developed model, it was observed that the shelf life of the Sriti variety of mung bean seeds in vacuum packaging could maintain 90% of germination level for 421 days or 14.3 months if stored at 20 °C, and for 173.37 days or 5.78 months if stored at 25 °C. © Published under licence by IOP Publishing Ltd.

关键词： Deterioration

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X-Ray Stress Measurement of Titanium Casting Materials 11

X-Ray Stress Measurement of Titanium Casting Materials

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11th World Conference on Titanium, Ti-2007

作者： Shiro, Ayumi Nishida, Masayuki Jing, Tian Advanced Course of Mechanical System engineering Kobe City College of Technology Kobe651-2194 Japan Department of Mechanical engineering Kobe City College of Technology Kobe651-2194 Japan School of Materials Science and Engineering Harbin Institute of Technology Harbin150001 China

ISBN: (纸本)9784889034066

Recently, titanium casting technology attracts attention in the industrial fields. These casting metals are including a various residual stresses due to the heat shrinkage and inclusion particles, et al. In order to apply the casting technology, the accurate estimation of residual stresses is desired in many cases. In this study, it aims at the nondestructive stress evaluation of titanium casting material by the X-ray stress measurement technique. At first in this study, the sin2ψ method which used in the usual X-ray stress measurement was tried to measured the residual stresses. However, it was unsuitable for measurement of titanium casting material because of including coarse grains. After corrosion treatment of the sample surface, the coarse crystal grains are observed on surface, and it could be look by the naked eye. Therefore, another X-ray method for single crystal system was employed to coarse crystal grains, in order to investigate the possibilities of residual stress estimating. Four-axes sample table which can set the both of tilt angle and rotate one on the sample surface was prepared. The stereographic diagrams and the theory of elasticity were used to measure the single crystal stresses on the sample surface. © Ti-2007 - Proceedings of the 11th World Conference on Titanium. All Rights Reserved.

关键词： Residual stresses

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Heat Transfer Efficiency Evaluation for Outward and Inward Multi-Flame-Hole Gas Burner

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Journal of Thermal Science 2012年第2期21卷 189-195页

作者： Shin-ichi MORITA Yasutaka HAYAMIZU Takashi KATAYAMA Hideo INABA Department of Mechanical Engineering Yonago National College of Technology 4448 Hikona-cho Yonago city Tottori 683-8502 Japan Department of System Production Engineering Yonago National College of Technology Advanced Course 4448 Hikona-cho Yonago city Tottori 683-8502 Japan Tsuyama National College of Technology 624-1 Numa Tsuyama city Okayama 708-8509 Japan

The purpose of this study is to understand the factor that influence the heating efficiency of the outward and inward multi-hole gas burner. The flame-hole angle and the distance from flame hole to heating object are chosen as the experimental parameters. The measurement of the flame temperature distribution is carried out on each experimental condition. The observation of combustion flame, by the Schlieren method, is done from the purpose to understand the combustion phenomenon on the heating efficiency. LPG (Liquefied petroleum gas) is used for the test fuel gas. The compositions of LPG are propane 97.5vol%, butane 0.2vol% and methane + ethylene 2.3vol%. The optimum ranges of the flame-hole angle and the distance from flame hole to heating object are clarified. The experimental correlation equations for the outward and inward multi-flame-hole gas burner are proposed.

关键词： Burner Heat Transfer Design Thermal Efficiency Energy Saving

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A digital hand to mimic human hand in real time operation: Making of digital finger with partial soft skin and rigid bone 11

A digital hand to mimic human hand in real time operation: M...

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11th International Conference on Computer Graphics Theory and Application, GRAPP 2016;Part of the 11th Joint Conference on Computer Vision, Imaging and Computer Graphics Theory and Applications, VISIGRAPP 2016

作者： Hashimoto, Hiroshi Yokota, Sho Chugo, Daisuke Mitsuhashi, Kaoru Industrial Technology Graduate Course Advanced Institute of Industrial Technology Tokyo Japan Department of Mechanical Engineering Toyo University Saitama Japan Department of Human System Interaction Kwansei Gakuin University Hyogo Japan Department of Mechanical Engineering Tokyo University of Technology Tokyo Japan

ISBN: (纸本)9789897581755

This paper presents a digital hand which is a type of model to mimic human hand operation in real time operation. Human hand performs various difficult tasks in daily life and shows dexterous operation to use tools or equipment, because it has numerous degree of freedom (DoFs) of finger joints and soft skin. To realize the mimic of human hand operation in real time operation to overcome the problems such as high DoFs, soft skin. We have developed the digital hand whose input to control hand posture is obtained from a hand posture sensor and soft skin is designed as mesh structure. Here, the way to define parameters of mesh structure is discussed. We demonstrate the simulation of the digital hand model and examine how the model is able to mimic the motion of human hand. © Copyright 2016 by SCITEPRESS - Science and Technology Publications, Lda. All rights reserved.

关键词： Degrees of freedom (mechanics)

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