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레이저 초음파의 횡파를 이용한 평판의 이면결함 측정에 관한 연구
이승훈(S. H. Lee),강영준(Y. J. Kang),이동환(D. H. Lee),백성훈(S. H. Baik),박승규(S. K. Park) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.9
Recently, an industrial interest for laser ultrasonic inspection system is increasing. A laser ultrasonic inspection system is non-contact inspection device which generates and measures ultrasounds by using laser beams. A laser ultrasonic inspection system provides a wide-band spectrum because the ultrasonic signal generated by a pulse laser beam and provides a high measurement resolution because the ultrasound is measured from a small focused spot of a detecting laser beam. In this paper, we have studied on the inspection technique of an opposite-side defect in a plate by using a laser-based shear wave. In this study, we could experimentally confirm that an opposite-side defect could be detected by observing the receiving of the laser-based shear wave.
윤경환(K. H. Yun),강영준(Y. J. Kang),박낙규(N. K. Park),백성훈(S. H. Baik),강신재(S. J. Kang) 대한기계학회 2004 대한기계학회 춘추학술대회 Vol.2004 No.10
A new dimension measuring method for the measurement of diameter of an object has been developed using laser triangulation. The 3-D data of an object was calculated from the 2dimensional image information obtained by the laser stripe using the laser triangulation. The system can measure the diameter of hole not only in a normal plane but also in an incline plane. We can experiment with magnification that is optimized according to size of object using zoom lens. In this paper, the theoretical formula and calibration of the system were described. The measuring precision of the system was investigated by experiment.
ESPI를 이용한 압력용기 내부 결함 측정 결과와 유한 요소 법을 이용한 결과 비교에 관한 연구
이정식(J. S. LEE),강영준(Y. J. Kang),백성훈(S. H. Baik) 한국정밀공학회 2005 한국정밀공학회 학술발표대회 논문집 Vol.2005 No.10월
The pipe which it uses from the nuclear power plant or factory by a long period use and a corrosive action the inside defect occurs on the inside. abstract here. The ESPI method is in order to investigate the laser light in the measurement object it will be able to measure the wide territory whole in once, does not receive an effect in direction of defect not to be, has the strong point it will be able to measure a change of place arrowhead real-time defect. It measured a inside defect of pressure vessel by using ESPI and FEM. It compared a each method result.
윤경환(K. H. Yun),강영준(Y. J. Kang),백성훈(S. H. Baik),강신재(S. J. Kang) 한국정밀공학회 2004 한국정밀공학회 학술발표대회 논문집 Vol.2004 No.10월
A new dimension measuring method for the measurement of diameter of an object has been developed using laser triangulation. The 3-D data of an object was calculated from the 2dimensional image information obtained by the laser stripe using the laser triangulation. The system can measure the diameter of hole not only in a normal plane but also in an incline plane. We can experiment with magnification that is optimized according to size of object using zoom lens. In this paper, the theoretical formula and calibration of the system were described. The measuring precision of the system was investigated by experiment.