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Measurement of the self-radiation impedance of an ultrasonic transducer with a square vibrating surface

정방형 방사면을 갖는 초음파 진동자의 자기방사임피던스 측정

Jungsoon Kim1
,
Moojoon Kim2*
김 정순1
,
김 무준2*
1동명대학교 전기공학과
2부경대학교 물리학과
*교신저자. *Corresponding Author. 
31 March 2017. pp. 108-114
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Abstract

We have experimentally analyzed the self-radiation impedance of an ultrasonic transducer with a square radiation surface that is used as a vibrator in underwater ultrasonic detection systems. The radiation reactance and the radiation resistance were measured in the range from 1 to 3 of ka that is the product of a wave number and a length of the edge of the square vibrator. By comparing the measured results with those of theoretical calculation of the radiation impedance using a series, we confirmed the validity of the experimental method and experimentally confirmed the variation trend in the radiation impedance of the square radiation surface.

Keywords
Ultrasonic transducer
Regular square radiation surface
Langevin type transducer
Radiation reactance
Radiation resistance
Self-radiation impedance

수중 초음파 탐지 시스템에서 배열 진동소자로 사용되는 정방형의 방사면을 갖는 초음파 트랜스듀서의 자기방사임피던스를 실험적으로 해석하였다. 7개의 진동수가 서로 다른 란주반형 진동자를 제작하여 파수와 진동자의 한 변의 길이의 곱인 의 값이 1~3의 범위에 대해서 방사리액턴스 및 방사저항을 측정하였다. 이 결과를 수열을 이용한 방사임피던스의 이론계산 결과와 비교하여 본 연구에서 수행한 실험방법의 유효성을 확인 하였고 정방형의 방사면에 대한 방사임피던스의 변화경향을 실험적으로 확인할 수 있었다.

키워드
초음파 트랜스듀서
정방형 방사면
란주반형 진동자
방사리액턴스
방사저항
자기 방사임피던스
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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 : 36
  • No :2
  • Pages :108-114
  • Received Date : 2017-01-11
  • Accepted Date : 2017-03-29
  • DOI :https://doi.org/10.7776/ASK.2017.36.2.108
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