Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
권호 표지
DOI QR코드

DOI QR Code

A Study on the Characteristics of Electronic Magnetic Interference(EMI) in Acoustic Emission Testing for Corrosion Detection of Ground Tank

지상탱크의 부식감지를 위한 음향방출시험에서 발생한 전자기간섭신호의 특성 연구

  • Kim, Sung-Dai (Department of Quality Non Destructive Testing, Seoul Sanggye Vocational School) ;
  • Jung, Woo-Gwang (School of Advanced Materials Engineering, Kookmin University)
  • 김승대 (서울시립상계직업전문학교 품질비파괴검사과) ;
  • 정우광 (국민대학교 신소재공학부)
  • Published : 2007.05.27
Download PDF
⟨ Previous Next ⟩

Abstract

The evaluation and comparison have been made for the EMI noise which was included in the signal from the sensors in the acoustic emission testing for the bottom plate of ground tank at full. The EMI signal has been classified into two types. One is the signal with very short AE count, and this signal possibly can be filtered by front end filter setting of the channel count with low level of 4 and high level of $10^8$. The other EMI signal occurred from CH 1, CH 3 and CH 10, and had high and constant duration with high energy and count (maximun duration > $10^5\;{\mu}s$), and has characteristic gradient of accumulation amplitude distribution. This signal should be removed in the AE signal evaluation by filtering, because this may affect to the total gradient.

Keywords

References

  1. L-O. Lee, W.-H. Yoon , T.-H. Lee and J.-K. Lee, Journal of the Korean Society for Nondestructive Testing, 23(3), 280 (2003)
  2. P.T. Cole and P.J. Van de Loo., Acoustic EmissionBeyond the Millennium., Ed. T. Kishi., M. Ohtsu and S. Yuyama, Elsevier, p. 169, (2000)
  3. Shigenori Yuyama. Minoru Yamada, Kazuyoshi Sekine, Shigeo Kitsukawa., Journal of High Pressure Institute of Japan, 40(4), 176 (2002)
  4. Guide pour Linspection et la Maintenance des Reservoirs Metaliques Aeriens Cylindriques Verticaux Dhydrocarbures Liquides en Raffincric, Edition Aout 2000, Union Francaise des Industries Petrolieres, (2000)
  5. HPIS (G 110 TR)., Recommended Practice for Acoustic Emission Evaluation of Corrosion Damage in Bottom Plate of Oil Storage Tanks.. High Pressure Institute of Japan, (2005)
  6. T. L. Fower. Progress in Acoustic Emission IV, Proceedings 9th International Acoustic Emission Symposium (Kobe, Japan, 1988) p.391-404
  7. J. R. Kwon, G. J. lyu, T. H. Lee and J. Y. Kim, KIGAS, 4(1), 9 (2000)
  8. Adrian A. Pollock, 'Acoustic Emission Amplitude Distributions', Duncdan/Endevco, DE-79-10, (1979)