• Title/Summary/Keyword: 랑주방형 변환기

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Vibration Characteristics of Langevin-Type Piezoelectric Torsional Transducers (랑주방형 압전 비틀림 변환기의 진동특성)

  • Kwon, Oh-Soo;Kim, Jin-Oh
    • Proceedings of the KSME Conference
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    • 2000.11a
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    • pp.612-617
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    • 2000
  • The vibrational characteristics of Langevin-type piezoelectric torsional transducers have been studied theoretically and experimentally in this paper. The differential equations of piezoelectric torsional motion have been derived in terms of the circumferential displacement and the electric potential. Solutions of the boundary-value problem have yielded the natural frequencies and mode shapes of the transducers. The theoretical solutions have been verified by comparing the numerical results with experimental ones.

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Vibration Characteristics of Langevin-Type Piezoelectric Torsional Transducers (랑주방형 압전 비틀림 변환기의 진동특성)

  • Kim, Jin-O;Gwon, O-Su
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.25 no.8
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    • pp.1197-1205
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    • 2001
  • The vibrational characteristics of Langevin-type piezoelectric torsional transducers, which consist of a couple of piezoelectric discs and a couple of elastic blocks, have been studied theoretically and experimentally in this paper. The differential equations of piezoelectric torsional motion have been derived in terms of the circumferential displacement and the electric potential. Solutions of the boundary-value problem have yielded the natural frequencies and mode shapes of the transducers. The theoretical solutions have been verified by comparing the numerical results with experimental ones.

Fabrication and Evaluation of Piezoelectric Torsional Transducers (압전 비틀림 파동 변환기 제작 및 평가)

  • Kwon, Oh-Soo;Kim, Jin-Oh
    • Journal of the Korean Society for Nondestructive Testing
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    • v.21 no.4
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    • pp.434-438
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    • 2001
  • Piezoelectric torsional transducers have been fabricated to generate torsional waves in a rod. The principle of generating torsional wane is based on the use of the circumferential shear motion derived by axial voltage exerted on the piezoelectric disk poled in the circumferential direction. The natural frequency or the piezoelctric torsional dish has been reduced by fabricating Langevin-type torsional transducers. The natural frequecies of the fabricated transducers have been measured and have shown good agreement with the characteristics predicted by analysis.

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