• Title/Summary/Keyword: 열화상카메라

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An Exploratory Study on the Optimized Test Conditions of the Lock-in Thermography Technique (위상잠금 열화상 기법의 최적 실험 조건 탐색 연구)

  • Cho, Yong-Jin
    • Journal of the Korean Society for Nondestructive Testing
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    • v.31 no.2
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    • pp.157-164
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    • 2011

  • This work is devoted to the technique application of lock-in infrared Thermography in the shipbuilding and ocean engineering industry. For this purpose, an exploratory study to find the optimized test conditions is carried out by the design of experiments. It has been confirmed to be useful method that the phase contrast images were quantified by a reference image and weighted by defect hole size. Illuminated optical intensity of lower or medium strength give a good result for getting a phase contrast image. In order to get a good phase contrast image, lock-in frequency factors should be high in proportion to the illuminated optical intensity. The integration time of infrared camera should have been inversely proportional to the optical intensity. The other hand, the difference of specimen materials gave a slightly biased results not being discriminative reasoning.

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이것이 신기술이다 - F/1.0 이중배율 비냉각 열화상카메라 광학계 개발

  • Kim, Hyeon-Gyu
    • The Optical Journal
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    • s.122
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    • pp.41-43
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    • 2009

  • 본 연구에서는 최근에 민수용으로 활용 빈도가 높은 $320{\times}240$ 어레이를 갖는 비냉각 검출기에 적합하도록 F/1.0. 이중배율 광학계를 설계제작하여 열영상을 획득하고 광학성능을 확인하기 위하여 최소분해가능온도차(MRTD; Minimum Resolvable Temperature Difference) 값을 측정하고 사람과 차량의 탐지를 추정하였다.

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