한국정밀공학회지 (Journal of the Korean Society for Precision Engineering)

  • 제29권1호
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  • Pages.48-55
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  • 2012
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  • 1225-9071(pISSN)
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  • 2287-8769(eISSN)
한국정밀공학회 (Korean Society for Precision Engineering)
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Digital Shearography 에서 Unwrapping 이미지와 FEM 을 이용한 압력용기의 내부결함 측정

Measurement of Internal Defects of Pressure Vessels using Unwrapping images in Digital Shearography

  • 김성종 (전북대학교 대학원 기계설계학과) ;
  • 강영준 (전북대학교 기계설계공학부) ;
  • 성연학 (전북대학교 대학원 기계설계학과) ;
  • 안용진 (전북대학교 대학원 기계설계학과)
  • Kim, Seong-Jong (Department of Mechanical Design,Graduate school of chonbuk Univ.) ;
  • Kang, Young-June (Department of Mechanical Design Engineering, Chonbuk Univ.) ;
  • Sung, Yeon-Hak (Department of Mechanical Design,Graduate school of chonbuk Univ.) ;
  • Ahn, Yong-Jin (Department of Mechanical Design,Graduate school of chonbuk Univ.)
  • 투고 : 2011.07.26
  • 심사 : 2011.09.16
  • 발행 : 2012.01.01
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초록

Pressure vessels in vehicle industries, power plants, and chemical industries are often affected by flaw and defect generated inside the pressure vessels due to production processes or being used. It is very important to detect such internal defects of pressure vessel because they sometimes bring out serious problems. In this paper, an optical defect detection method using digital shearography is used. This method has advantages that the inspection can be performed at a real time measurement and is less sensitive to environmental noise. Shearography is a laser-based technique for full-field, non-contacting measurement of surface deformation (displacement or strain). The ultimate goal of this paper is to detect flaws in pressure vessels and to measure the lengths of the flaws by using unwrapping, phase images which are only obtained by Phase map. Through this method, we could decrease post-processing (next processing). Real length of a pixel can be calculated by comparing minimum and maximum unwrapping images with shearing angle. Through measuring several specimen defects which have different lengths and depths of defect, it can be possible to interpret quantitatively by calculating gray level.

키워드

참고문헌

  1. Nichols, R. W., "In-service inspection as an aid to steel pressure vessel reliability?" Conference on Reactor Inspection, pp. 24-37, 1975.
  2. Hung, Y. Y., "Shearography: A Practical Nondestructive Testing Method, Edited by McGonnagle, W. J., International Advances in Nondestructive Testing, Vol. 14," pp. 95-124, 1989.
  3. Andreas, E., "Nondestructive Inspection with Shearography," Proc. SPIE, Vol. 2248, pp. 222-228, 1994.
  4. Kim, K. S., Jung, H. C., Chang, H. S., Kim, H. S. and La, S. W., "Defect Detection of Wall Thinned Straight Pipe using Shearography and Lock-in Infrared Thermography," Journal of the Korean Society for Precision Engineering, Vol. 26 No. 11, pp. 55-61, 2009.
  5. Chang, H. S., Jung, S. W., Kim, K. S. and Jung, H. C., "Quantitative Measurement of Out-of-plane Deformation Using Shearography," Journal of the Korean Society for Precision Engineering, Vol. 24, No. 4, pp. 131-137, 2007.
  6. Davila, A., Kaufmann, G. H. and Perez-Lopez, C., "Transient deformation analysis using a carrier method of pulsed electronic speckle-shearing pattern interferometry," Appl. Opt., Vol. 37, No. 19, pp. 4116-4122, 1998. https://doi.org/10.1364/AO.37.004116
  7. Steinchen, W., Kupfer, G. and Yang, L., "Nondestructive testing of micro-cracks using digital Speckle pattern shearing interferometry," Proc. SPIE, Vol. 3098, pp. 528-535, 1997.
  8. Steinchen, W., Yang, L. X., Schuth, M. and Kupfer, G., "Electronic Shearography(ESPI) for direct Measurement of Strains," Proc. SPIE, Vol. 2248, pp. 210-221, 1994.
  9. Mcgonnagle, W. J., "Nondestructive testing 2nd Ed.," Mcgraw-Hill, pp. 92-178, 1961.
  10. Doebelin, E. O., "Measurement systems; application and design, 4th Ed.," McGraw-Hill, pp. 251-253, 2003.
  11. Ennos, A. E., "Speckle Interferometry, Edited by Daint, J. C., Laser Speckle and Related Phenimena, " Springer Germany, pp. 203-207, 1975
  12. Goodman, J. W., "Statistical properties of laser speckle patterns, Edited by Dainty, J. C., Laser Speckle and Related Phenomena," Springer Germany, pp. 9-13, 1975.
  13. Jones, R. and Wykes, C., "Holographic and Speckle Interferometry," Cambrige University Press, pp. 146- 148, 1989.
  14. Hung, Y. Y., "Shearography for Non-destructive Evaluation of Composite Structures," Optics and Lasers in Engineering, Vol. 24, No. 2-3, pp. 161-182, 1996 https://doi.org/10.1016/0143-8166(95)00020-8
  15. Hung, Y. Y., "Shearography : A Novel and Practical Approach for Nondestructive Inspection," Journal of Nondestructive Evaluation, Vol. 8, No. 2, pp. 55-67, 1988.
  16. Mader, D. L., "Holographic and nonholographic NDT for nuclear and coal-fired power plants," Proc. SPIE, Vol. 604, pp. 37-56, 1986.
  17. Jones, R. and Wykes, C., "Holographic and Speckle Interferometery: A discussion of the theory, practice and application of the techniques, 2nd Edition," Cambridge University Press, 1989.
  18. Creath, K., "Temporal Phase Measurement Methodes, in Interferogram Analysis: Digital Fringe Pattern Measurement Techniques, Ed. Robinson, David W. and Reid, Graeme T.," IOP Publishing, pp. 94-140, 1993.
  19. Mader, D. L., "Holographic and nonholographic NDT for nuclear and coal-fired power plants," Proc. SPIE Vol. 604, pp. 37-56, 1986.

피인용 문헌

  1. Computer Vision-Based, Noncontacting Deformation Measurements in Mechanics: A Generational Transformation vol.65, pp.5, 2013, https://doi.org/10.1115/1.4024984