The Journal of the Acoustical Society of Korea (한국음향학회지)

The Acoustical Society of Korea (한국음향학회)
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Design and Fabrication of a Convex Array Ultrasonic Transducer with Finite Element Analysis

유한요소 해석법을 이용한 컨벡스 배열형 초음파 탐촉자의 설계 및 제작

  • 이수성 (경북대학교 센서공학과) ;
  • 권재화 (경북대학교 센서공학과) ;
  • 은홍 (경북대학교 기계공학부) ;
  • 노용래 (경북대학교 기계공학부)
  • Published : 2002.10.01
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Abstract

In this study, an ultrasonic transducer was designed with a commercial finite element analysis (FEA) code, PZFlex, and fabricated based on the design. The transducer has the dimension and shape suitable for abdomen diagnosis working at 5 ㎒ and consists of 128 piezoelectric elements disposed in a convex linear array form. The transducer is composed of two impedance matching layers, one backing layer, and kerfs placed between the piezoelectric elements. Validity of the design with the FEA was illustrated through experimental characterization of a sample transducer. Comparison with the design results by equivalent circuit analysis method was also made to check the superiority of the FEA design.

본 연구에서는 상용 유한요소 해석 프로그램인 PZflex를 이용하여 초음파 탐촉자를 설계하고 이에 따라 제작하였다. 제작된 탐촉자는 복부 진단용에 적합한 크기와 형태로 중심 주파수 5 ㎒에 128개의 압전 소자가 곡면상에 1차원 배열된 컨벡스 (convex)형이며 두 층의 음향정합층, 하나의 후면층 그리고 각 압전소자 간의 커프로 구성된다. 제작된 탐촉자의 성능을 평가하여 설계치의 타당성을 검증하였으며, 등가회로 해석법에 의한 결과와 비교하여 유한 요소 해석법에 의한 설계법의 우수성을 확인하였다

Keywords

References

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