다중 모드 Total Focusing Method를 이용한 균열형 결함 영상화

국문 초록 (Abstract)

Full matrix capture (FMC)는 위상배열 초음파 탐촉자에서 가능한 모든 송수신 조합으로 radio frequency (RF) 형태의 A-scan 데이터 전체를 수집하는 신호 수집 방법이다. 수집된 FMC 데이터의 후처리를 통해 기존 위상배열 초음파와 동등한 영상 뿐만 아니라 기존 위상배열 초음파에서 구현하지 못하는 다양한 영상을 구현할 수 있다. 특히, corner trap echo 신호를 이용하는 다중 모드 Total focusing method (TFM)은 균열형 결함을 영상화 할 수 있다. 본 논문에서는, 기울어진 균열형 결함을 영상화하기 위한 다중 모드 total focusing method (TFM)에 대한 기본 알고리즘을 기술하고, 초음파 시뮬레이션과 실험에 의해 수집된 FMC 데이터로 구성된 다중모드 TFM 영상을 비교하였다.

다국어 초록 (Multilingual Abstract)

Full matrix capture (FMC) is a data acquisition process that collects a complete matrix of radio frequency (RF) A-scan data from every possible independent transmit-receive combination in a phased array ultrasonic transducer. Through post-processing of the FMC data, it is possible to create not only the images equivalent to a conventional phased array image but also various images that cannot be performed from conventional phased array data. Especially, the multi-mode total focusing method (TFM), which uses a corner trap echo signal, can image a crack-type flaw. This paper describes the basic algorithm of the multi-mode TFM, which is able to image angled crack type flaws. In addition, the multi-mode TFM images reconstructed from the FMC dataset obtained from the ultrasonic simulation and the experiments are compared.

목차 (Table of Contents)

• 초록
• Abstract
• 1. 서론
• 2. 다중 모드 TFM에 의한 영상화
• 3. 시뮬레이션을 통한 다중 모드 TFM 영상화
• 4. 실험을 통한 다중 모드 TFM 영상화
• 5. 결론
• References

참고문헌 (Reference)

1 A. J. Hunter, "The wavenumber algorithm for full-matrix imaging using an ultrasonic array" 55 (55): 2450-2462, 2008

2 M. Sutcliffe, "Realtime full matrix capture for ultrasonic non-destructive testing with acceleration of post-processing through graphic hardware" 51 : 16-23, 2012

3 A. Bulavinov, "Real-time quantitative Ultrasonic Inspection" 1-15, 2007

4 C. Holmes, "Post-processing of the full matrix of Ultrasonic transmit-receive array data for non-destructive evaluation" 38 (38): 701-711, 2005

5 E. Ginzel, "Phased Array Ultrasonic Technology" Eclipse Scientific Products Inc 23-37, 2013

6 G. Dao, "Full matrix capture with a customizable phased array instrument" 1650 : 1001-1006, 2015

7 이태훈, "Full Matrix Capture 데이터를 이용한 균열 영상화" 한국비파괴검사학회 37 (37): 13-20, 2017

8 이태훈, "Full Matrix Capture 기법을 통한 초음파신호 영상화 향상 연구" 한국비파괴검사학회 35 (35): 299-306, 2015

9 E. Carcreff, "Fast total focusing method for ultrasonic imaging" 1706 (1706): 040001-, 2016

10 P. Tremblay, "Development and validation of a full matrix capture solution" 85-94, 2012

11 E. Carcreff, "Comparison of conventional technique and migration approach for total focusing" 70 : 566-569, 2015

12 S. Robert, "Assessment of real-time techniques for ultrasonic non-destructive testing" 1430 (1430): 1960-1967, 2012

13 Olympus NDT, "Advances in phased array ultrasonic technology applications" 7-18, 2007

14 P. D. Wilcox, "Advanced reflector characterization with ultrasonic phased arrays in NDE applications" 54 (54): 1541-1550, 2007

15 C. Holmes, "Advanced post-processing for scanned ultrasonic arrays: Application to defect detection and classification in non-destructive evaluation" 48 : 636-642, 2008

16 L. Le Jeune, "Adaptive ultrasonic imaging with the total focusing method for inspection of complex components immersed in water" 1650 (1650): 1037-1046, 2015

17 M. V. Felice, "Accurate depth measurement of small surface-breaking cracks using an ultrasonic array post-processing technique" 68 : 105-112, 2014

18 M. Njiki, "A multi-FPGA implementation of real-time reconstruction using total focusing method" 468-473, 2013

19 M. Njiki, "A multi-FPGA architecture-based real-time TFM ultrasound imaging" 1-17, 2016