Name KIRYU Shogo
Official Title Professor
Affiliation Faculty of Science and Engineering, Medical Engineering
Profile My recent research fields are wireless power transmission and acoustic engineering. Wireless power transmission is widely used to charge a battery in small electronic devices such as smartphones. Recently, magnetic resonance power delivery is developed and the transfor distance is getting to longer. In our lab., wireless power transfer systems delivering power to implantable devices is studying. In the research of acoustic engineering, I am especially interested in spacial audio, distortion due to time jitter in digital audio, and signal analysis using statistical characteristics.
Research Field(Keyword & Summary)
  1. Electromagnetic measurement, Acoustic Engineering, Wireless Power Transfer

    (1) Wireless power transmittion by using sown coils: we are developing magnetic resonant wireless power transfer systems using sown coils. The coils are made of rits wire. Ritz wire is not only low loss at higher frequency but also flexible. The wire can be sown in cloths such as a shirt due to the flexibility.

  2. Electromagnetic measurement, Acoustic Engineering, Wireless Power Transfer

    (2) Spacial audio: Spacial audio is recently used in movies and musics such as Dolby Atomos and 360 Aeality Audio. We are developing a recording and reproducing system conposed from 4 small microphones and software. The audio spacial information is recording by using the system and the sound with spacial effects such as a specific directional control.

  3. Electromagnetic measurement, Acoustic Engineering, Wireless Power Transfer

    (3) Signal analysis using statistical characteristics: In analysis of random signals, the statistical characteristics are sometimes important. Normal distribution are often assumed in many analysis methods. It is, however, difficult to estimate the statistical distribution of the signal. One method to estimate that is to use the statistical moments of the signal. A normalized high-order statistical moments is proposed to analyze the statistical distribution.

Representative Papers
  1. (1) R. Sasaki, K. Koizumi, and S. Kiryu , A Sown Auxiliary Coil for Improvement of Efficiency in Wireless Power Transmission to an Implantable Device from a Transmitter in an Implantable Device,“, International Journal of Applied Electromagnetics and Mechanics, Accepted.
  2. (2) T. Watanabe, R. Kato, K. Murata, and S. Kiryu, “Electric Characteristics of Capacitors Using a Conductive Transparent Film for an Application to Wireless Power Transfer, “ International Journal of Applied Electromagnetics and Mechanics, Accepted.
  3. (3) R.Suwahara, R.Kato, K.Murata, T.Watanabe, Y.Shimatani, and S. Kiryu, “A Coil for Wireless Power Transmission by Using Sewing Technique with Litz Wire, “ Journal of the Japan Society of Applied Electromagnetics and Mechanics, Vol. 27, No. 1, pp. 49-54, 2019.
Grant-in-Aid for Scientific Research Support: Japan Society for Promotion of Science (JSPS)
Recruitment of research assistant(s) No
Affiliated academic society (Membership type) (1) JSEAEM(member), (2) IECE(member), (3)ASJ(member)
Education Field (Undergraduate level) Electromagnetism, Acoustic Engineering, Measurement Engineering, Digital Circuits
Education Field (Graduate level) Medical Electronics