Three-dimensional reconstruction of transverse hole defect in plate based on TOFD inspection

ABSTRACT

In this paper, aluminium plate specimens with circular transverse hole defect was prepared, and the specimen was subjected to ultrasonic non-destructive testing using the TOFD (Time-of-Flight Diffraction) inspection method. Simultaneously, addressing the issue of three-dimensional reconstruction of defect within the field of ultrasonic non-destructive testing, a method combining the least squares approach and volumetric rendering was proposed to process the B-scan images obtained from TOFD inspection. This method was used to reconstruct the three-dimensional shape of transverse hole defect. The result shows that processing defect information acquired through TOFD inspection using the integrated approach of least squares and volumetric rendering leads to clear three-dimensional reconstruction images. This research offers an efficient method for the three-dimensional visualisation of transverse hole defect in plate.

KEYWORDS:

• TOFD
• least squares method
• volumetric rendering
• three-dimensional reconstruction

Acknowledgments

The authors would like to thank all the reviewers for their valuable comments.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This work was supported by the National Natural Science Foundation of China [Grant Nos.51374015 and 10872001], the Key Scientific and Technological Research Project of the Ministry of Education [Grant No.211076], and the Anhui Fund Project for Outstanding Youths [Grant No.10040606Y26].