Shin-nosuke Suzuki

Power and Interactive Information Transmission to Implanted Medical Device Using Ultrasonic

In this paper, we propose the power supply and the bi-directional information transmission system using ultrasonic. Ultrasonic does not interfere with the electronic circuits of implanted devices and is safe for a living body. Previously, we have clarified experimentally that ultrasonic is applicable to power and information transmission. This study deals with improving information transmission speed from the inside to the outside of the body. The new system uses two transmission paths, Path 1 and Path 2. Each path consists of a pair of piezo oscillators. Path 1 transmits a carrier wave and Path 2 echoes back the inside information. As a result, the transmission speed increases to 9.6 Kbps from 600 bps without errors. Additionally, several types of information, such as text, static and motion image files can be transmitted. The proposed system can be applied to various medical applications.

Electric power-generating system using magnetic coupling for deeply implanted medical electronic devices

This paper proposes an innovative electric power supply system for medical devices implanted deeply, using a low-frequency magnetic field. It is composed of a permanent-magnet coupling and a small generator. The system provides sufficient power at deep positions, adopting two kinds of acceleration. A prototype experiment is carried out and it is verified that the system is able to provide power at deep positions in the human body.

Fundamental study of an electric power transmission system for implanted medical devices using magnetic and ultrasonic energy

Abstract In this paper, the authors propose a novel electric power supply system for implanted medical devices. The system is noninvasive and uses two kinds of energy, magnetic and ultrasonic. The system can provide high power levels harmlessly. The energies are obtained by two types of vibrator, i.e., piezo and magnetostriction devices. A prototype was built and it was verified experimentally that the system is basically able to provide power. At high frequencies, such as 100 kHz, the output power was higher than the conventional system using a transformer. The normalized output power per unit volume also exceeded the transformer system.

Evaluation of force delays on the operation of haptic sense

Recently, virtual reality (VR) technology has developed quickly, together with research conducted on various elemental and related technologies and research in various fields of its application. We experimented about the delay. The haptic media is very sensitive to the network delay and its jitter and packet loss. The AHP is one of methods to evaluate physical phenomena as correctness of the human sensation. In consequence of its application to the present experiment, it was made clear that the haptic media could be estimated from the delay times. An experiment was conducted using the AHP technique into the effect of feedback force delay on users by using the normal feedback force of a spring as an experimental model. The experiments in this study showed that there is a time delay threshold of 4 ms or more. In addition, when a thorough experiment was conducted in this range, it was found that humans could perceive a variation (difference threshold) in the delay of feedback force for a virtual spring that is between 4 ms and 5 ms.

Loss analysis and efficiency improvement of the power supply system using magnetic coupling for medical implants

Noninvasive electric power supply for medical implants, such as artificial hearts and cardiac pacemakers, should be indispensable, as the function of these devices becomes more sophisticated and the power consumption is increasing. The paper proposed a novel power supply system for a deep position, using magnetic coupling. The system does not have a danger of the wire break or corrode. Several losses of the system were analyzed, in order to improve the system. In addition, exchanging the rectifier, the rotation speed can be kept slower and the mechanical loss is decreased when the batteries are charged.

A proposal of method to make active learning from class to self-study using active note taking and active textbook system

Abstract In this paper, we describe a method to make active learning from class to self-study by two proposed methods. One of them is naming active note taking (A-note), which actively makes note taking at class. The other is a system called active textbook system (A-txt) which promotes students’ self-study by adding digital contents to a general paper textbook and browsing with a mobile smart device. A-note is aimed at making the head work for taking note itself. In this method, in order to reduce passive note taking as much as possible, let students actively write out the information by the students’ words and diagrams to handouts distributed in advance. In the class to which this method was applied, the results of the test improved and the introduction effect was confirmed. We also analyzed the materials written by students using image processing technology. When examining the correlation between the analyzing results and the test results, a certain correlation was observed. Therefore, quantitative effects by introducing A-note could be shown. As for A-txt, we expanded iOS application using augmented reality (AR) technology in order to be more easy and effective the conversion of general books into digital educational materials. In this time, we have developed a GUI system that makes it easy to produce the additional content to a textbook. In addition, we added functions that allow students to post questions about the textbook etc. to teachers. We also conducted an application survey cooperating testers and found a smart device specification that can use A-txt without problems. Therefore, by combining A-note and A-txt, we found a possibility that students actively learn from lecture to self-study.

Basic Development of the Active Textbook System consisted of a General book and a Portable Electronic Terminal

Abstract We have proposed a novel educational system named the active textbook (hereafter A-txt) system. A-txt system consists of an ordinary paper-based textbook, a general portable electronic terminal with a camera like a smartphone and application software for the system. A normal textbook can be evolved into a digital one through the attachment of additional digital information and all kinds of digital contents such as movie, animation, 3D CG and so on will be available. The teachers who use the system can create contents for A-txt freely without expertise about information technology. The introduction cost is relatively low, because the mobile terminal for students may be their owned general-purpose type, not special-purpose type, and authored educational materials do not need particular software. For the reasons above, the system has a large possibility to spread in multiple educational fields and it can be easy for students to understand several subjects into which the system is introduced.

Electric power generating system using magnetic coupling, for medical electronic devices implanted deeply

Summary form only given. Safe electric power provision to medical implants, such as pacemakers and artificial hearts, is much needed, because those medical devices are becoming more sophisticated. Up to the present, several noninvasive methods of transmitting power to a rechargeable battery for implanted medical devices have been reported. In this paper, we propose a novel electric power provision system to a medical implant at a deep position in the body. A permanent magnet rotor is set up outside the body. Another permanent magnet rotor, in which a generator has been installed, is implanted. The magnets of the rotors have magnetic coupling each other. When the rotor outside the body rotates, the other rotor in the body synchronously rotates and the electric power is generated from the mechanical power.