INSIDE the Laboratory

Human Information Systems Division

Electromagnetic Bioinformation Engineering Laboratory

Kazushi Ishiyama, Professor
Shuichro Hashi, Associate Professor
Yoshiaki Hayashi, Assistant Professor

Our laboratory researches high-sensitivity sensors and sensing systems, which utilize magnetic motions and functions based on electromagnetic phenomena and the character of magnetic materials. The sensing system can catch the electromagnetic signals from the human body not only from the electric devices. Our group has 13 members: Prof. Kazushi Ishiyama, Associate Prof. Shuichiro Hashi, Assistant Prof. Yoshiaki Hayashi, one research assistant, one Ph.D. course students, six master course students and two undergraduate students.

Our three representative research topics are as follows;

1. Magnetic wireless pumps for artificial heart assist blood pump

To realize fully implantable artificial heart assist blood pumps, we research wireless and battery-free pumps driven by magnetic torque and force. The simple structure composed of a pump housing and a full magnetic impeller enables us to reduce the size and weight of the blood pumps. We have succeeded in the development of small pumps which are fully implantable size and have sufficient hydrodynamic performance to assist the heart of adults.

2. High-sensitivity strain sensors and microvibration measuring systems

We work on development of high-sensitivity sensors using magnetic films. Through investigation on control methods of the magnetic anisotropy and optimum designs of the sensors, we have previously developed a strain sensor with the highest sensitivity (Gauge factor: 18,000) in the world. Currently, we also work on the development of microvibration measuring systems using the strain sensor.

3. Wireless magnetic motion capture system

We research less-invasive motion capture systems for medical and welfare applications. Our proposed magnetic system using battery-free LC markers is capable of wireless detecting the position, orientation and motion of the markers. Moreover, unlike other techniques, this magnetic system is also capable of detecting the markers in unseen spaces such as inside the living body.

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