Journal of the Korean Crystal Growth and Crystal Technology (한국결정성장학회지)

The Korea Association of Crystal Growth (한국결정성장학회)
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Behavior of ultrasonic transducer in air by using finite element method simulation

FEM 시뮬레이션을 이용한 공기 중에서의 초음파 트랜스듀서의 거동

  • Chae, Yeon-Hwa (Icheon Branch, Korea Institute of Ceramic Engineering and Technology) ;
  • Choi, Kyoon (Icheon Branch, Korea Institute of Ceramic Engineering and Technology) ;
  • Lee, Ho-Yong (R & D Center, Ceracomp Co., Ltd.)
  • Received : 2018.09.14
  • Accepted : 2018.09.28
  • Published : 2018.10.31
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Abstract

The Tonpilz transducer was implemented using the structural module of COMSOL which is a FEM simulation tool. In order to compare the sound pressure characteristics of the transducer with the simulated results, the spacial distribution of the sound pressure level (SPL) was simulated by the acoustic module of COMSOL and then compared with the SPL distribution measured by a microphone. As a result, the resonance frequency and the peak in SPL for the simulation were predicted to be 28 kHz and 163.5 dB, respectively. And the resonance frequency and the peak in SPL for the actual transducer were measured to be 28.84 kHz and 137.8 dB, respectively. It is also confirmed that the simulated SPL distribution and the actually measured one are formed in a similar pattern.

Tonpilz 트랜스듀서를 FEM 시뮬레이션인 COMSOL의 structural module을 이용하여 구현하였다. 트랜스듀서의 음압 특성과 시뮬레이션 결과를 비교하기 위하여 acoustic module을 이용하여 형성된 음압의 공간적인 분포와 실제로 트랜스듀서를 구현하여 마이크로폰으로 측정한 음압 분포를 비교하였다. 그 결과, 공진주파수와 최대 음압은 시뮬레이션의 경우는 28 kHz에서 163.5 dB로 예측되었고 실제 제작된 트랜스듀서에서는 28.84 kHz에서 137.8 dB로 측정되었다. 또한 모사된 음압 분포와 실제로 측정한 음압 분포가 유사한 패턴으로 형성되는 것을 확인하였다.

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References

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