Noise filtering in the synthetic transmit aperture imaging by decomposition of the time reversal operator: Application to flaw detection in coarse-grained stainless steels

E.R.L. Villaverde (1) , S. Robert (1) , C. Prada (2)

1 DISC (CEA, LIST) - Département Imagerie et Simulation pour le Contrôle (CEA, LIST)
2 IL - Institut Langevin - Ondes et Images (UMR7587)

In the present work, the Synthetic Transmit Aperture (STA) imaging is applied on coarse grained steels using a contact phased-array probe. In order to reduce the noise introduced by the heterogeneous structure, as well as artifacts due to surface guided waves, the Decomposition of the Time Reversal Operator method is performed before calculating STA images.

Mots clés: Decomposition of the time reversal operator; Flaw detection; Heterogeneous materials; Heterogeneous structures; Noise filtering; Non destructive testing; Phased array probes; Synthetic transmit aperture imaging; Ultrasonic testing; Antenna phased arrays; Audio signal processing; Guided electromagnetic wave propagation; Materials testing; Nondestructive examination; Spurious signal noise; Synthetic apertures; Ultrasonic applications; Ultrasonic imaging

Domaines: Physique [physics]

E.R.L. Villaverde, S. Robert, C. Prada. Noise filtering in the synthetic transmit aperture imaging by decomposition of the time reversal operator: Application to flaw detection in coarse-grained stainless steels. Physics Procedia, 2015, 70, pp.562-565. ⟨10.1016/j.phpro.2015.08.020⟩. ⟨cea-01827678⟩