Shinya Matsutomo
Niihama National College of Technology
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Publication
Featured researches published by Shinya Matsutomo.
IEEE Transactions on Magnetics | 2012
Shinya Matsutomo; Takenori Miyauchi; So Noguchi; Hideo Yamashita
In electromagnetics education, it is important for beginners, who start to learn electromagnetics, to give an illustration of magnetic field. In this paper we propose a new real-time visualization system. It can visualize a composite image of source materials and their generated magnetic field utilizing the Augmented Reality technique to the users. With this real-time visualization system, electromagnetics learners can observe the visualized magnetic field as a realistic magnetic distribution on real-time and the visualized field changes immediately they move the objects.
IEEE Transactions on Magnetics | 2012
Shinya Matsutomo; So Noguchi; Hideo Yamashita
To solve electromagnetic field problems by the finite element method, it is necessary for a user to make a mesh in preprocess. However, the made mesh is usually different from that made by the other users, since it depends on the users experience and knowledge. The mesh strongly affects the accuracy of the analysis result. The adaptive finite element method has been researched in order to address this problem. In this paper, we propose a new mesh generation method utilizing magnetic flux lines in two-dimensional electromagnetic field problem. Utilizing the magnetic flux lines computed with a rough mesh, it is possible to distribute elements with different densities suitable for the electromagnetic field distribution.
IEEE Transactions on Magnetics | 2006
Shinya Matsutomo; Tomoyuki Miyamoto; Kazufumi Kaneda; So Noguchi; Hideo Yamashita
The finite-element analysis is widely used in design stage of electromagnetic apparatuses. The analysis accuracy depends on the characteristics of the finite-element mesh, e.g., number of nodes, number of elements and shape of elements. Recently, the adaptive finite-element analysis is one of the most promising numerical analysis techniques. In process of the adaptive finite-element method, the error evaluation is one of the important schemes. In this paper, a new error evaluation scheme, which is suitable for electromagnetic problems, is proposed. The proposed error evaluation method is then applied to two-dimensional and three-dimensional magnetostatic field problems for its verification
IEEE Transactions on Magnetics | 2004
Shinya Matsutomo; So Noguchi; Hideo Yamashita; Shigeya Tanimoto
Optimal design techniques, which consist of numerical analysis and optimization technique, are commonly used for enhancing the efficiency and for reducing the noise of electromagnetic device. In the optimal design techniques, it is required that the exact solution of the analysis and the precise characteristic of the electromagnetic devices should be obtained. However, usually it is impossible to make the exact model of an electromagnetic device and to remove the numerical error of the numerical analysis. This is one of the reasons why the optimal design techniques has not been more widely utilized. In this paper, a new concept for optimal design considering the accuracy of the analysis is proposed. The proposed optimal design method considers the accuracy of the analysis and indicates multiple solutions. To verify its usefulness, in this paper, an example using the proposed method is shown.
IEEE Transactions on Magnetics | 2013
Shinya Matsutomo; Kenta Mitsufuji; Yuta Hiasa; So Noguchi
In this paper, we propose a real-time visualization system utilizing Augmented Reality Technology for electromagnetics education. It gives an image of magnetic field generated by a bar magnet with a piece of iron in real-time, however the bar magnet and the piece of iron are represented by mock ones. In the newly proposed visualization system, these mocks are captured by a web camera, and mesh needed in the calculation of magnetic field is deformed. Subsequently, a finite element analysis is carried out in very short time and then the magnetic field is immediately visualized. Thereby, it is, in real-time, observable that magnetic flux lines generated by the bar magnet are attracted to a piece of iron. Moreover, when a user moves the mocks, the magnetic flux lines are immediately depicted according to the position of the mocks.
Compel-the International Journal for Computation and Mathematics in Electrical and Electronic Engineering | 2011
Takashi Naohara; Hiromichi Aono; Hideyuki Hirazawa; Tsunehiro Maehara; Yuji Watanabe; Shinya Matsutomo
Purpose – The purpose of this paper is to develop a ferromagnetic needle adaptable for a novel ablation cancer therapy; the heat generation ability of the mild steel rod embedded into the Ti‐tube having a different thickness was investigated in a high‐frequency output at 300 kHz.Design/methodology/approach – The outer diameter and length of the Ti‐tubes were 1.8 and 20 mm, respectively, while the inner diameter was varied from 1.6 to 0 mm. The mild steel rod was embedded in a Ti‐tube for preparing the needle‐type specimen. Their heat generation ability was examined by changing the inclination angle to the magnetic flux direction in a high‐frequency coil.Findings – When the thickness of the Ti surrounding the mild steel rod was as low as 0.1 mm, the heat generation ability was drastically different among the three inclination angles (θ=0°, 45°, and 90°) to the magnetic flux direction due to the effect of the shape‐induced magnetic anisotropy. However, the effect of the inclination angle was almost eliminat...
Journal of Functional Biomaterials | 2012
Takashi Naohara; Hiromichi Aono; Tsunehiro Maehara; Hideyuki Hirazawa; Shinya Matsutomo; Yuji Watanabe
To develop a novel ablation therapy for human solid cancer, the heating properties of a ferromagnetic carbon steel rod and a prototype Ti-coated needle using this carbon steel rod, were investigated in several high-frequency outputs at 300 kHz. In the former, the heating property was drastically different among the three inclination angles (θ = 0°, 45° and 90°) relative to the magnetic flux direction as a result of the shape magnetic anisotropy. However, the effect of the inclination angles was completely eliminated in the latter. It is considered that the complete non-oriented heating property relative to the magnetic flux direction allows the precise control of the ablation temperature during minimally invasive thermotherapy without a lead-wire connected to a fiber-optic thermometer. This newly designed Ti-coated device will be suitable for clinical use combined with its superior biocompatibility for ablation treatments using high-frequency induction heating.
IEEE Transactions on Magnetics | 2015
So Noguchi; Shinya Matsutomo
In this paper, we propose an economically efficient optimal design method of different-size interior permanent magnet (IPM) motors to maximize their efficiency. Since the homothetic shape is used, the optimization design is, at once, performed. The use of the commonalized design can reduce the productive costs. Game theory is employed as an optimization method. The game theory can simultaneously increase the efficiency of all the IPM motors with the common and homothetic shape. So far, there are no previous reports considering both the economical efficiency and the motor performance simultaneously. Therefore, the proposed optimal design method of the commonalized different-size IPM motors using the game theory method achieves a high electrical efficiency in addition to the economical efficiency due to design optimization.
IEEE Transactions on Magnetics | 2017
Shinya Matsutomo; Tomohisa Manabe; Vlatko Cingoski; So Noguchi
In this paper, a visualization system of immersion into 3D magnetic field based on the augmented reality technology using a head mounted display, for education purpose, is presented. By utilizing the proposed visualization method, a user can easily observe and perceive in real-time a magnetic field distribution generated by single/multiple sources (e.g., permanent magnets and/or coils) and other magnetic/nonmagnetic material in an augmented 3-D space.
ieee conference on electromagnetic field computation | 2016
Shinya Matsutomo; Tomohisa Manabe; Vlatko Cingoski; So Noguchi
An immersive real-time visualization system of 3-D magnetic field for educational purposes is presented. This immersive visualization system is based on augmented reality technology. The proposed system provides observation of a magnetic field distribution and its stereoscopic vision in 3-D space using head mounted display. To improve the visualization capabilities, a new real-time method for drawing magnetic flux lines in 3-D space is developed and presented in this paper. It enables a user to easily observe and grasp a magnetic field generated by multiple sources (e.g., magnets and/or multiple coils) in an augmented 3-D space. Additionally, it permits a user to freely and interactively move the magnetic sources within the visualization space and to observe the magnetic fields interference in real-time. As a result, one can intuitively and easy visualize, observe and grasp the magnetic field even in 3-D space.