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Application Angle of Defects Detection in the Pipe Using Lock-in Infrared Thermography

위상잠금 적외선 열화상 기법을 이용한 각도별 원전 감육 배관의 결함 검출

  • 윤경원 (조선대학교 대학원 첨단부품소재공학과) ;
  • 고경욱 (조선대학교 대학원 첨단부품소재공학과) ;
  • 김진원 (조선대학교 원자력공학과) ;
  • 정현철 (조선대학교 기계설계공학과) ;
  • 김경석 (조선대학교 기계설계공학과)
  • Received : 2013.06.10
  • Accepted : 2013.08.22
  • Published : 2013.08.30

Abstract

This perform research of angle rated defect detection conditions and nuclear power plant piping defect detection by lock-In infrared thermography technique. Defects were processed according to change for wall-thinning length, Circumference orientation angle and wall-thinning depth. In the used equipment IR camera and two halogen lamps, whose full power capacitany is 1 kW, halogen lamps and target pipe's distance fixed 2 m. To analysis of the experimental results ensure for the temperature distribution data, by this data measure for defect length. Reliability of lock-In infrared thermography data is higher than Infrared thermography data. This through research, Shape of angle rated defect is identified industry place. It help various angles defect detection in the nuclear power plant in operation.

위상잠금 적외선 열화상 기법을 이용하여 원전 배관의 결함 검출 및 각도별 결함 검출 조건에 관한 연구를 수행하였다. 결함의 가공은 감육 길이, 원주방향 각도, 감육 깊이를 변화시켜 결함조건을 가공하였다. 사용된 장비는 적외선 열화상 카메라와 1 kW용량의 halogen lamp 2개를 사용하였으며, halogen lamp와 대상 배관과의 거리는 2 m로 고정시켜 실험을 수행하였다. 실험결과의 분석을 위하여 온도분포, 위상 데이터를 확보하고, 이를 분석하여 결함 길이를 측정하였다. 이 연구를 통해 각도별로 나타나는 감육 결함의 검출 형태를 파악함으로서 실제 발전소의 배관에 나타나는 다양한 각도의 결함의 분석이 가능하다. 적외선 열화상 데이터보다 위상잠금 적외선 열화상 데이터가 측정 결과의 신뢰도가 높았다.

Keywords

References

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