Journal of the Architectural Institute of Korea Structure & Construction (대한건축학회논문집:구조계)

Architectural Institute of Korea (대한건축학회)
권호 표지
DOI QR코드

DOI QR Code

Non-destructive Measurement Technique of Welding Using Infrared Thermography Technique

적외선 열화상 기법을 이용한 용접부의 결함 비파괴 측정기법

  • Received : 2017.05.29
  • Accepted : 2017.10.10
  • Published : 2017.11.30
⟨ Previous Next ⟩

Abstract

Recently, the Infrared-Thermography Technique is widely used for nondestructive testing (NDT) of structures due to its convenience. In particular, various techniques have been applied to detect imperfections such as surface defects and welding defects of steel structures. This paper is a part of a study to detect defects in weld zone in steel structures using Infrared Thermography techniques. The temperature on steel structures surface depends on the material and thermal properties such as specific heat, thermal conductivity, and thermal diffusion coefficient. In this study, Infrared thermography technique was used to detect the information on the diagnosis of steel structure in welds. Test specimens were prepared with artificial defects, then the passive and active methods were used to determine damages on the steel structures in welds as well to detect the defects. Finally, defects were observed by comparing infrared thermal image and surface temperature data of defected area with the normal area. Furthermore, the defects were measured using the standard deviation of the temperature corresponding to the weld. For normal weld, the standard deviation of the temperature corresponding to the weld zone was low; although the standard deviation of the weld defects zone was high.

Keywords

Acknowledgement

Supported by : 국토교통과학기술진흥원

References

  1. Special Act in the Safety Control of Public Structures (2004).
  2. Yoo, L., Kim, J., & Lee, G. (2015). Hybrid Non-destructive measurement technique of welding using infrared data, Journal of the Korean Society of Tribologists And Lubrication Engineers, 127-128
  3. Kim, Y., & Kil, S. (2017). Latest Technology of Non Destructive Inspection for Welded Structure, Journal of the Korean Wedling & Joining Society, 35(2), 63-70
  4. Choi, M., Kang, K., Park, J., Kim, W., & Kim, K. (2007). Defect Sizing and Location by Lock-in Photo-Infaraed Thermography, Journal of the Korean Society for Nondestructive Testing, 27(4), 321-327
  5. Park, H., Choi, M., Park, J., Kim, W., & Choi, W. (2011). Study on the Qualitative Defects Detection in Composites by Optical Infrared Tehrmography, Journal of the Korean Society for Nondestructive Testing, 31(2), 150-156
  6. Lee, C., Baek, W., & Kim, S. (2012). Diagnosis and Evaluation of the Real Time Transformer by the Infrared Thermal Image Equipment, Journal of the Korean Society of Manufacturing Technology Engineers, 21(4), 666-671 https://doi.org/10.7735/ksmte.2012.21.4.666
  7. Jung, Y., Roh, C., Lee, G., & Kim, J. (2016). Reliability Evaluation of a Motor Core Applied Ultrasound Infrared Thermography Technique, Journal of the Korean Society of Manufacturing Process Engineers, 15(4), 60-66 https://doi.org/10.14775/ksmpe.2016.15.4.060
  8. Yun, J., Paik, I., & Cho, S. (2006). Non-Destructive Corrosion Measurement Technique of Reinforcing Bar Using Infrared Thermography according to Atmosphere Temperature, Journal of the Korean Concrete Institute, 233-236
  9. Sim, J., Zi, G., & Lee, J. (2008). Non-destructive evaluation technology using infrared thermography and near infrared heating for detecting inside-defects of concrete structures, Journal of Korean Concrete Instritute, 1021-1024
  10. Paik, I., Cho, S., & Chung, L. (2005). Non-destructive Measurement Method of Reinforcement Corrosion Level by Infrared Thermography Data, Journal of The Architectural Instritute of Korea Structure and Construction, 21(8), 3-10
  11. Kwon, S. & Maria, Q. (2010). An Experimental Study for Characteristics Evaluation of Cement Mortar Using Infrared Thermography Technique, Journal of The Korean Society of Civil Engineers, 30(1), 55-59
  12. Moore, P. (2001). Nondestructive Testing handbook, ASTN Infarared and Thermal Testing, 3(3), 223-246
  13. Planck, M. (1900). On the Theory of the Energy Distribution Law of the Normal Spectrum, Verhandl. Deutsch. Phys. Ges. 2, 237, 163-180
  14. Grande, N. & Durbin, P. (1999). Using emissivity-corrected thermal maps to locate deep structural defects in concrete bridge decks, SPIE Conference 2456, 250-261