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적외선 열화상 이미지 컨트라스트 파라미터를 이용한 결함 크기의 비파괴 평가
최정영(Jungyoung Choi),최수용(Sooyoung Choi),김재연(Jaeyeon Kim),유기태(Kitae Yoo),박재원(Jaiwon Park),현창용(Hyunchang Yong),변재원(Jaiwon Byeon) 한국신뢰성학회 2018 신뢰성응용연구 Vol.18 No.1
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.