FEM 시뮬레이션을 이용한 위상배열 초음파 집속 기법의 집속 성능 비교 연구

국문 초록 (Abstract)

위상배열 초음파 탐촉자를 이용한 비파괴검사는 초음파 빔의 집속과 조향을 통해 피검체 내부 구조를 가시화한다. 이러한 이미지 기반 검사에서 이미지의 품질을 증가시키기 위해서는 집속 성능을 증가시켜 초음파의 신호 대 잡음비(SNR)를 높이는 것이 중요하다. 그에 따라 위상배열 초음파 탐촉자를 이용한 결함의 평가와 이미지화를 위한 집속 기법들이 발전되어 왔다. 본 논문에서는 현재까지 소개된 위상배열 초음파 탐촉자의 집속 기법들인 phase matching method, adaptive focusing method, time reversal technique, synthetic aperture focusing technique, total focusing method, dynamic depth focusing 등을 유한요소해석(FEM)을 통해 재현하고, 이미지를 구성하는 방식, 특징, 장단점을 정리하였다.

다국어 초록 (Multilingual Abstract)

A phased array ultrasonic transducer produces the specimen image by focusing and steering the ultrasound and showing the inner structure. In this type of image-based inspection, the signal-to-noise ratio must be increased by improving the focusing performance to produce a better image. The focusing method is important, hence, many types of this method have been developed. This study reproduces focusing methods, namely phase matching method, adaptive focusing method, time reversal technique, synthetic aperture focusing technique, total focusing method, and dynamic depth focusing with finite element method, and organizes the focusing method characteristics.

목차 (Table of Contents)

• 초록
• Abstract
• 1. 서론
• 2. 집속 기법 정리
• 3. 위상배열 초음파 집속 기법 성능 비교
• 4. 결론
• References

참고문헌 (Reference)

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