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Design and Fabrication of a 2D Array Ultrasonic Transducer

2D 배열형 초음파 트랜스듀서의 설계 및 제작

Wonseok Lee
,
Jeongdong Woo
,
Yongrae† Roh†
이 원석
,
우 정동
,
노 용래††
School of Mechanical Engineering, Kyungpook National University
경북대학교 기계공학과
†교신저자. †Corresponding Author. 
30 September 2013. pp. 393-401
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Abstract

In this paper, a 48×64 channel 2D array ultrasonic transducer with piezoelectric single crystals was designed, fabricated, and evaluated. Structure of the transducer was chosen to facilitate the electric connection on the planar array, and then components were fabricated in accordance with the structure. Detailed structure of the transducer was designed through finite element analyses. In order to improve the performance of the transducer, the crosstalk between adjacent elements was reduced through the control of kerf width and material, and the target frequency bandwidth was achieved through optimal design of the thickness of the single crystal and matching layers. After fabricating a prototype of the transducer according to the design and measuring its characteristics, the results were compared with those of finite element analyses to evaluate the performance of the developed transducer.

Keywords
Ultrasonic transducer
2D array transducer
Piezoelectric single crystal

본 논문에서는 48×64 채널로 이루어진 압전단결정 2D 배열형 초음파 트랜스듀서의 설계, 제작 및 평가를 하였다. 전기적 연결이 용이한 평면배열 구조를 선정한 후, 그에 맞게 구성소자를 제작하였다. 유한요소 해석을 통하여 트랜스듀서의 세부 구조를 설계하였다. 트랜스듀서의 성능을 향상시키기 위해 치폭의 너비와 재료를 조절하여 소자간 상호간섭을 저감하고, 압전단결정 및 정합층의 최적 두께를 설계하여 목표 주파수 대역폭을 구현하였다. 설계에 따라 트랜스듀서의 시작품을 제작하고 그 특성을 측정한 후, 측정된 결과를 유한요소 해석 결과와 비교하여 개발된 트랜스듀서의 성능을 평가하였다.

키워드
초음파 트랜스듀서
2차원 배열형 트랜스듀서
압전단결정
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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 :5
  • Pages :393-401
  • Received Date : 2013-04-11
  • Revised Date : 2013-06-05
  • Accepted Date : 2013-06-17
  • DOI :https://doi.org/10.7776/ASK.2013.32.5.393
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