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2013 Vol.32, Issue 3
다중모드 광대역 Tonpilz 트랜스듀서의 설계 및 제작
Jinwook Kim1
,
Hoeyong Kim2
,
Yongrae Roh1*
김 진욱1
,
김 회용2
,
노 용래1*
1경북대학교 기계공학부
2(주)한화 선임연구원
*Corresponding Author
31 May 2013. pp. 191-198
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Abstract

In this paper, we designed a wideband Tonpilz transducer, and verified the validity of the design through experiments. The wide frequency bandwidth was achieved by coupling the fundamental longitudinal mode of the transducer with a flapping mode of the head mass. Structure of the Tonpilz transducer was optimized by means of the finite element method and genetic algorithm to achieve the widest fractional bandwidth under design constraints. The optimized structure showed a far wider -6dB fractional bandwidth of transmitting responses than that of single mode transducers. For verification of the design result, we manufactured a transducer prototype of the designed structure and characterized its performance, which showed good agreement with the design results.

Keywords
Tonpilz transducer
Flapping mode
Multi-mode
Wideband
Transmitting voltage response (TVR)

본 논문에서는 광대역 Tonpilz 트랜스듀서를 설계하고, 설계 결과의 타당성을 실험적으로 검증하였다. 광대역 주파수 특성을 이루기 위해서 전면추의 flapping 모드를 트랜스듀서의 종방향 공진 모드와 결합시켰으며, 유한요소 해석과 유전자 알고리즘을 이용하여 주어진 설계조건, 구동조건 하에서 가장 넓은 송신 비대역폭(fractional bandwidth)을 확보할 수 있는 트랜스듀서의 최적 구조를 설정하였다. 최적화된 구조는 단일모드 트랜스듀서에 비해 월등히 넓은 -6 dB 송신 비대역폭을 나타내었다. 설계 결과의 타당성을 검증하기 위하여 도출된 최적 구조대로 트랜스듀서 시험편을 제작하여 주파수 특성을 측정하였으며, 측정결과는 설계 결과와 잘 일치하였다.

키워드
Tonpilz 트랜스듀서
Flapping 모드
다중 모드
광대역
송신음압감도(TVR)
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Information
  • Publisher :The Acoustical Society of Korea
  • Publisher(Ko) :한국음향학회
  • Journal Title :The Journal of the Acoustical Society of Korea
  • Journal Title(Ko) :한국음향학회지
  • Volume : 32
  • No :3
  • Pages :191-198
  • Received Date : 2013-01-11
  • Accepted Date : 2013-02-18
  • DOI :https://doi.org/10.7776/ASK.2013.32.3.191
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