The Journal of the Acoustical Society of Korea (한국음향학회지)

The Acoustical Society of Korea (한국음향학회)
권호 표지

Characteristics Control of a Thickness Mode Piezoelectric Vibrator Using a Negative Impedance Converter Circuit

부임피던스 변환회로를 이용한 두께 모드 압전 진동자의 특성제어

  • 황성필 (부경대학교 대학원 음향진동공학과) ;
  • 김무준 (부경대학교 물리학과) ;
  • 하강열 (부경대학교 물리학과)
  • Published : 2002.10.01
Download PDF
⟨ Previous Next ⟩

Abstract

In this paper, a Negative Impedance Converter (NIC) circuit was employed for the electro-mechanical characteristic control of a thickness mode piezoelectric vibrator. Two circular plane piezoelectric vibrators were bonded together and the NIC circuit was connected to one of the vibrators. The theoretical and experimental analysis of the characteristics shown that the quality factor and the electro-acoustic efficiency of the vibrator with the NIC circuit could be improved by 20 times and 2.5 times, respectively.

본 연구에서는 두께 모드 압전 진동자의 특성제어 부임피던스 변환 (NIC) 회로를 적용하였다. 두 개의 두께 모드 압전 진동자를 적층한 후, NIC 회로를 적용하여 입력 어드미턴스와 전기기계 변환효율을 측정한 결과를 시뮬레이션 결과와 비교하였다. 그 결과 NIC 회로에서 구현되는 부저항의 값에 따라 압전 진동자의 품질계수 및 전기음향 변환효율이 제어되었으며 NIC 회로를 적용한 경우에 품질계수는 약 20배, 전기음향 변환효율은 약 2.5배 정도 향상됨을 확인하였다.

Keywords

References

  1. Ultrasonnics Symposium, Proceedings, IEEE v.1 Piezoelectric characteristics of PMN-PZT ceramics for piezoelectric transfomer J.H.Yoo;H.S.Yoon;K.H.Yoon;Y.H.Jeong;C.Y.Park
  2. Jpn. J. Phys. v.36 Basic investigation on achieving high resonance quality factor of plezoelectric vibrator H.Tamura;Y.Tomikawa;C.Kusakabe;K.Sakurai;K.Ohnishi https://doi.org/10.1143/JJAP.36.3030
  3. Interdisciplinary Program of Acoustics and Vibration Engineering A Study for Characteristics Control of Piezoelectric Transducer and Sensitivity Improvement of Flexural-Type Ultrasonic Sensor Y.I.Ko;M.J.Kim;K.L.Ha
  4. Ph.D. Dissertation, depau of in Electrical Engineering, VPI Design and Analysis of Piezoelectric Transformer Converters C.Y.Lin
  5. 超音波工學 日本電子機械工學會(編)
  6. Ultrason. Ferroelect., and Freq., Contr., IEEE Transactions on v.46 no.2 PSpice modeling of ultrasound transducers: Comparison of software models to experiment E.Maione;P.Tortoli;G.Lypacewicz;A.Nowicki https://doi.org/10.1109/58.753029
  7. IEEE Tras. Ultrason., Ferroelect., Freq., Contr. v.41 no.1 Controlled-source analogue circuits and PSpice models for piezoelectric transducers W.M.Leach,Jr. https://doi.org/10.1109/58.265821