서지주요정보
압전형 초음파 변환자의 제작 및 성능해석 = Fabrication and performance analysis of piezoelectric ultrasonic transducers
서명 / 저자 압전형 초음파 변환자의 제작 및 성능해석 = Fabrication and performance analysis of piezoelectric ultrasonic transducers / 이종현.
발행사항 [서울 : 한국과학기술원, 1986].
Online Access 원문보기 원문인쇄

소장정보

등록번호

4104019

소장위치/청구기호

학술문화관(문화관) 보존서고

DME 8608

휴대폰 전송

도서상태

이용가능

대출가능

반납예정일

리뷰정보

초록정보

Ultrasound has been shown as an important tool in NDT applications, especially, in diagnostic imaging systems. The quality of ultrasonic imaging has close relations with the characteristics of acoustic waves generated by the ultrasonic transducers. In this thesis, the method of analysis, fabrication, and experiments for piezoelectric ultrasonic transducers are investigated. Also, the evaluation of piezoelectric composite materials for ultrasonic medical applications are carried out. In chapter 2, the fundamental concepts and important performance parameters in the design of ultrasonic transducers are introduced. And, the functions of each component of the transducer in transmitting and receiving the ultrasonic waves are described. In chapter 3, the internal losses of a piezoelectric resonator and layers are considered in the analysis of the performances of piezoelectric ultrasonic transducers. The piezoelectric resonator is represented by the transmission line model in terms of 5 effective parameters in which the attenuation coefficient is suggested to involve the internal losses of the transducer. The attenuation coefficients of PZT by our resonance method are in good agreement with those by pulse-echo method. By inserting these 5 model parameters into the developed simulation programs, the round trip insertion loss and pulse-echo response are calculated for the variation of important components of an ultrasonic transducer. These results give useful guidelines to design the ultrasonic transducers. In chapter 4, PZT-polymer composite plates with 1-3 connectivity are considered, and the experimental study on the relation between electrical input impedance and vibration modes is performed. This composite transducer is verified to have a stable pulse-echo response for the variation of the thickness of matching layer. Even with a single matching layer, the pulse-echo response of the composite transducer has a broadband characteristic with the quality factor of 2.1. The experimental pulse-echo response is in good agreement with predicted one, and this fact confirms the effectiveness for biomedical applications. In chapter 5, the operation and beam pattern of linear array are described. For the fabricated linear array with 33 elements, the electrical impedance, impulse response, cross coupling, and angular response are measured and discussed.

서지기타정보

서지기타정보
청구기호 {DME 8608
형태사항 viii, 139 p. : 삽도 ; 26 cm
언어 한국어
일반주기 부록 : 변환자 요소에 대한 전달 행렬 및 전달함수
저자명의 영문표기 : Jong-Hyun Lh
지도교수의 한글표기 : 이병호
지도교수의 영문표기 : Byung-Ho Lee
학위논문 학위논문(박사) - 한국과학기술원 : 기계공학과,
서지주기 참고문헌 : p. 66-76
주제 Ultrasonic imaging.
Diagnosis, ultrasonic.
Ultrasonic waves.
Biomedical engineering.
초음파. --과학기술용어시소러스
초음파 화상. --과학기술용어시소러스
압전 진동자. --과학기술용어시소러스
초음파 진단. --과학기술용어시소러스
압전 재료. --과학기술용어시소러스
Piezoelectric transducers.
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