Synthetic aperture focusing technique (SAFT) and total focusing method (TFM) have become popular tools in the field of ultrasonic non destructive testing. In particular, they are employed for detection and characterization of flaws. From data acquired with a transducer array, those techniques aim at reconstructing an image of the inspected object from coherent summations. In this paper, we make a comparison between the standard technique and a migration approach. Using experimental data, we show that the developed approach is faster and offers a better signal to noise ratio than the standard total focusing method. Moreover, the migration is particularly effective for near-surface imaging where standard methods used to fail. On the other hand, the migration approach is only adapted to layered objects whereas the standard technique can fit complex geometries. The methods are tested on homogeneous pieces containing artificial flaws such as side drilled holes.
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10 February 2016
42ND ANNUAL REVIEW OF PROGRESS IN QUANTITATIVE NONDESTRUCTIVE EVALUATION: Incorporating the 6th European-American Workshop on Reliability of NDE
26–31 July 2015
Minneapolis, Minnesota
Research Article|
February 10 2016
Fast total focusing method for ultrasonic imaging
Ewen Carcreff;
Ewen Carcreff
a)
1
The Phased Array Company
, 9365 Allen road, West Chester, Ohio, USA
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Gavin Dao;
Gavin Dao
b)
2
Advanced OEM Solutions
, 8044 Montgomery road 700, Cincinnati, Ohio, USA
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Dominique Braconnier
Dominique Braconnier
1
The Phased Array Company
, 9365 Allen road, West Chester, Ohio, USA
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AIP Conf. Proc. 1706, 040001 (2016)
Citation
Ewen Carcreff, Gavin Dao, Dominique Braconnier; Fast total focusing method for ultrasonic imaging. AIP Conf. Proc. 10 February 2016; 1706 (1): 040001. https://doi.org/10.1063/1.4940495
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