Journal of Sensor Science and Technology (센서학회지)

The Korean Sensors Society (한국센서학회)
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Proposal of a piezoelectric floating mass transducer for implantable middle ear hearing devices

이식형 인공중이를 위한 압전 플로팅 매스 트랜스듀서의 제안

  • Lee, Chang-Woo (School of Electrical Engineering & Computer Science, Kyungpook National University) ;
  • Kim, Min-Kyu (Dept. of Medical & Biological Engineering, Graduate School, Kyungpook National University) ;
  • Park, Il-Yong (Advanced Research Center for Recovery of Human Sensibility, Kyungpook National University) ;
  • Song, Byung-Seop (Dept. of Rehabilitation Science & Technology, School of Rehabilitation Science, Daegu University) ;
  • Roh, Yong-Rae (School of Mechanical Engineering, Kyungpook National University) ;
  • Cho, Jin-Ho (School of Electrical Engineering & Computer Science, Kyungpook National University)
  • 이창우 (경북대학교 전자전기컴퓨터학부) ;
  • 김민규 (경북대학교 대학원 의용생체공학과) ;
  • 박일용 (경북대학교 첨단 감각기능 회복장치 연구센터) ;
  • 송병섭 (대구대학교 재활공학과) ;
  • 노용래 (경북대학교 기계공학부) ;
  • 조진호 (경북대학교 전자전기컴퓨터학부)
  • Published : 2005.09.30
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Abstract

A new type of transducer, piezoelectric floating mass transducer (PFMT) which has advantages of piezoelectric and electromagnetic transducer has been proposed and implemented for the implantable middle ear hearing devices. By the uneven bonding of piezoelectric material to the inner bottom of transducer case, the PFMT can vibrate back-and-forth along the longitudinal axis of the transducer even though the piezoelectric material within the cylindrical case produces only the bilateral expansion and contraction according to the applied electrical signal. To improve efficiency of the PFMT, the multi-layered piezoelectric material has been adapted. The small number of components in the PFMT enables the simple manufacturing and the easy implanting into the middle ear. In order to examine the characteristics of vibration, mechanical modeling and finite element analyses of the proposed transducer have been performed. From the result of theoretical analyses and the measured data from the experiment, it is verified that the implemented PFMT can be used in implantable middle ear hearing devices.

Keywords

References

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