Affiliations: [a] School of Mechanical Science and Engineering,
Huazhong, Zhejiang, China | [b] University of Science and Technology, Wuhan, Hubei,
China | Université Laval, Canada | Tohoku University, Japan
Correspondence:
[*]
Corresponding author: Jun Tu, School of Mechanical Science and
Engineering, Huazhong, Zhejiang, China. Tel.: +86 027 8755 6942; E-mail:
tjezhou5196@163.com
Abstract: The problem of inability to calibrate due to uneven thickness in
automatic ultrasonic testing used for the upset region of the drill pipe was
studied. A water-immersion ultrasonic testing system was established to
accomplish the inspection for this area and provide the defects information for
post process. A real-time tracking method based on surface reconstruction was
present to ensure all of the artificial defects to be accurately detected. An
adjusting algorithm for the data was performed to update the detecting results,
so that the fitted curve was favorable for calibration. A sample pipe with
through-holes was test with the system. The experimental results showed that
all of the artificial defects could be detected after surface reconstruction
and the adjusted data could provide the basis for the quantification of flaw,
all of which had proved the data adjusting algorithm to be effective.
Keywords: Water-immersion ultrasonic testing system, reconstruction, data adjusting algorithm, the upset region
