Journal of Applied Reliability (한국신뢰성학회지:신뢰성응용연구)

The Korean Reliability Society (한국신뢰성학회)
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Nondestructive Evaluation of Defect Size by Using a Contrast Parameter of Infrared Image

적외선 열화상 이미지 컨트라스트 파라미터를 이용한 결함 크기의 비파괴 평가

  • Choi, Jungyoung (Manufacturing Technology Convergence Program, Seoul National University of Science and Technology) ;
  • Choi, Sooyoung (Manufacturing Technology Convergence Program, Seoul National University of Science and Technology) ;
  • Kim, Jaeyeon (Program of Materials Science & Engineering, Convergence Institute of Biomedical Engineering and Biomaterials, Seoul National University of Science and Technology) ;
  • Yoo, Kitae (Manufacturing Technology Convergence Program, Seoul National University of Science and Technology) ;
  • Park, Jaiwon (Department of Non Destructive Inspection, Asea Aviation College) ;
  • Hyun, Changyong (Manufacturing Technology Convergence Program, Seoul National University of Science and Technology) ;
  • Byeon, Jaiwon (Manufacturing Technology Convergence Program, Seoul National University of Science and Technology)
  • 최정영 (서울과학기술대학교 신소재공학과) ;
  • 최수용 (서울과학기술대학교 신소재공학과) ;
  • 김재연 (서울과학기술대학교 의공학-바이오소재융합협동과정 신소재공학프로그램) ;
  • 유기태 (서울과학기술대학교 신소재공학과) ;
  • 박재원 (아세아항공 전문학교 비파괴검사학과) ;
  • 현창용 (서울과학기술대학교 신소재공학과) ;
  • 변재원 (서울과학기술대학교 신소재공학과)
  • Received : 2018.03.15
  • Accepted : 2018.03.23
  • Published : 2018.03.25
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Abstract

Purpose: In this study, the defect quantification of thin metal plate was evaluated by using lock-in infrared thermography. Methods: A STS304 standard specimens, which had the artificial-defects of different size, were used. The focal distance between the infrared camera and the specimen was set to 500mm, and the distance between the lump and the specimen was set to 200mm. One halogen lamp with a maximum capacity of 1kW was used, and phase-lock infrared thermal images with a frequency of 1Hz were captured and analyzed. Result: Objectively quantified data values were obtained by analyzing the contrast ratio and signal-to-noise ratio. Conclusion: The possibility of defect diagnosis for thin metal plate was confirmed by using the lock-in infrared thermography technique.

Keywords

References

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