NDT of Specimen of Complex Geometry Using Ultrasonic Adaptive Techniques - The F.A.U.S.T. System

New Developments in Ultrasonic NDT Modeling in CIVA

“…To obtain the highest performances requested by the safety authorities, in defect characterization and adaptation to complex testing configurations, the FAUST system (Focusing Adaptive UltraSonic Tomography) has been developed by the CEA [7]. It relies on optimized multiple-element transducers connected to a multiple-acquisition system, supplying delay and amplitude laws for driving the ultrasonic beam (focusing at various depths, beam steering, adaptive focusing).…”

“…A first one is dedicated to the conception of so-called Fermat's transducer, that is, transducer which radiating surface is an equiphase relatively to a point into the piece at which focusing is sought. A second one is dedicated to the optimization of multiple-element transducers developed at CEA [7] for specific configurations. A third one is a tool for helping the understanding of complex transducer diffraction effects.…”

CEA Program for Multiple-Technique Non Destructive Testing: The CIVA System

“…As a consequence, it handles different types of data: ultrasonics, X rays and neutron radiography, eddy currents, on which various imaging and processing tools can be applied. General developments available in ClVA are presented in details in other publications: Ultrasonic modeling [1 ,2,3], phased array system [4] , X rays radiography [5] , signal processing [6] or industrial applications [7]. We will give here only a brief overview of the different possibilities offered by the system.…”