Skip to main content
SpringerLink
Log in

Restoring the image of reflectors using the C-SAFT method during multiple reflection of echo signals from the boundaries of a cylindrical inspection object

  • Acoustic Methods
  • Published:
Russian Journal of Nondestructive Testing Aims and scope Submit manuscript

Abstract

A modified method of combined SAFT (C-SAFT) for restoring the images of reflectors is considered; it allows the multiple reflection of a pulse from the boundaries of the wall of a cylindrical inspection object. To verify the efficiency of the proposed algorithm, images of a crack were restored from echo signals that were calculated using the CIVA software package, which is intended for modeling the propagation and scattering of ultrasonic pulses. It was shown in a model experiment that the consideration of changes in the pulse phase during reflection from the inspection-object boundaries at various incident angles of an S-wave in the image-restoration algorithm increases the frontal resolution by more than two times. The consideration of five reflections from the inspection-object boundaries made it possible to obtain images of reflectors by the M-C-SAFT method using many acoustic schemes. The images allow one to determine the type of defects, as well as their dimensions and location in the depth of the wall of a pipeline that is 720 mm in diameter.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. Advances in phased array ultrasonic technology applications, Waltman, Olympus NDT, 2007. http://www.olympus-ims.com/en/books/.

  2. MULTIX POCKET 64 × 64 PA and DFA flaw detector. http://www.m2m-idt.com/products-1-25-en.html.

  3. OMNISCANMX DFA flaw detector. http://www.olympus-ims.com/ru/omniscan/mx/.

  4. ISONIC DFA flaw detector. http://www.sonotronndt.com/i2009.htm.

  5. Bazulin, E.G., Golubev, A.S., and Kokolev, S.A., Application of an ultrasonic antenna array for registering echo signals by the double-scanning method for obtaining flaw images, Russ. J. Nondestr. Test., 2009, no. 2, pp. 86–97.

    Google Scholar 

  6. Chatillon, S., Fidahoussen, A., Iakovleva, E., and Calmon, P., Time of flight inverse matching reconstruction of ultrasonic array data exploiting forwards models, Proc. NDT in Canada National Conf., 2009.

    Google Scholar 

  7. Kovalev, A.V., Kozlov, V.N., Samokrutov, A.A., Shevaldykin, V.G., and Yakovlev, N.N., Pulse echo method for concrete inspection. Noise and space selection, Defektoskopiya, 1990, no. 2, pp. 29–41.

    Google Scholar 

  8. Voronkov, V.A., Voronkov, I.V., Kozlov, V.N., Samokrutov, A.A., and Shevaldykin, V.G., On applicability of antenna array technology to solution of problems of ultrasonic inspection of hazardous industrial objects, V Mire Nerazr. Kontr., 2011, vol. 51, no. 1, pp. 64–70.

    Google Scholar 

  9. A1550 IntroVisor high-frequency ultrasonic tomograph. http://acsys.ru/production/?type_id=16&subtype_id=7&product_id=106.

  10. Bazulin, E.G., Comparison of ultrasonic nondestructive inspection based on antenna arrays or phased antenna arrays systems, Defektoskopiya, (in press).

  11. Kravtsev, Yu.A. and Orlov, Yu.I., Geometricheskaya optika neodnorodnykh sred (Geometrical Optics of Inhomogeneous Media), Moscow: Nauka, 1980.

    Google Scholar 

  12. Ermolov, I.N. and Lange, Yu.V., Ul’trazvukovoi kontrol’, in Nerazrushayushchii kontrol’. Spravochnik. Pod obshch. red. V.V. Klyueva. vol. 3 (Nondestructive Testing. Reference Book. Ed. by V.V. Klyuev), Moscow: Mashinostroenie, 2004.

    Google Scholar 

  13. Born, M. and Vol’f, E., Osnovy optiki: Per. s angl. Izd. 2, ispr. (Foundations of Optics: Russian Trans., 2nd edition, revised), Moscow: Nauka, 1973.

    Google Scholar 

  14. Bazulin, E.G., Determining the flaw type from images obtained by the C-SAFT method with account for transformations of wave types upon reflections of ultrasonic pulses from the irregular boundaries of a test object, Russ. J. Nondestr. Test., 2011, no. 1, pp. 30–44.

    Google Scholar 

  15. Bazulin, E.G., Imaging of flaws with allowance for multiple reflections of ultrasonic pulses from plane-parallel boundaries of a tested object, Russ. J. Nondestr. Test., 2007, no. 7, pp. 456–473.

    Google Scholar 

  16. CIVA Official Site. http://www.extende.com/civa-2.

Download references

Author information

Authors and Affiliations

  1. ECHO+ Scientific Production Association, Moscow, Russia

    E. G. Bazulin

Authors
  1. E. G. Bazulin
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to E. G. Bazulin.

Additional information

Original Russian Text © E.G. Bazulin, 2013, published in Defektoskopiya, 2013, Vol. 49, No. 2, pp. 23–42.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Bazulin, E.G. Restoring the image of reflectors using the C-SAFT method during multiple reflection of echo signals from the boundaries of a cylindrical inspection object. Russ J Nondestruct Test 49, 77–92 (2013). https://doi.org/10.1134/S1061830913020022

Download citation

  • Received:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1134/S1061830913020022

Keywords

Search

Navigation