Adaptive Ultrasonic Imaging with the Total Focusing Method for Inspection of Complex Components Immersed in Water - Archive ouverte HAL Access content directly
Conference Papers Year : 2015

Adaptive Ultrasonic Imaging with the Total Focusing Method for Inspection of Complex Components Immersed in Water

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Abstract

In this paper, we propose an ultrasonic adaptive imaging method based on the phased-array technology and the synthetic focusing algorithm Total Focusing Method (TFM). The general principle is to image the surface by applying the TFM algorithm in a semi-infinite water medium, Then, the reconstructed surface is taken into account to make a second TFM image inside the component. In the surface reconstruction step, the TFM algorithm has been optimized to decrease computation time and to limit noise in water. In the second step, the ultrasonic paths through the reconstructed surface are calculated by the Fermat's principle and an iterative algorithm, and the classical TFM is applied to obtain an image inside the component. This paper presents several results of TFM imaging in components of different geometries, and a result obtained with a new technology of probes equipped with a flexible wedge filled with water (manufactured by Imasonic).
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Dates and versions

cea-01852425 , version 1 (01-08-2018)

Identifiers

Cite

L. Le Jeune, Sebastien Robert, P. Dumas, A. Membre, C. Prada. Adaptive Ultrasonic Imaging with the Total Focusing Method for Inspection of Complex Components Immersed in Water. 41st annual review of progress in quantitative nondestructive evaluation, vol 34, Jul 2014, Boise, United States. pp.1037-1046, ⟨10.1063/1.4914712⟩. ⟨cea-01852425⟩
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