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Non destructive testing

List institute research on Non Destructive Testing (NDT) covers major inspection technics: Ultrasounds and guided waves, electromagnetic methods, radiography and tomography.Our institute is internationally renowned in this field mainly thanks to CIVA software born from NDT department research works. This research works mobilises about 100 researchers on two main topics: modelling and simulation tools and new instrumentation methods and imaging.

The main concerned industrial fields are energy, transport (automotive, aeronautics, railway…), steel and petrochemicals. New collaborations are being initiated with the medical body.

Among our academic partners

CNRS, ENSTA, INSA Lyon, Supelec, INRIA, RCNDE, Imperial College, Fraunhofer Institutes (IZfP, ITWM), Bordeaux University, Budapest University, University of Napoli, University of Western Macedonia.

Assets

  • Around 100 researchers and 6 laboratories dedicated to NDT
  • Permanent workflow between research (more than 20 theses in process) and industrial demand through CIVA users’ community, first NDT software platform worldwide (more than 200 companies use List CIVA software)
  • GERIM platform – (large-scale research equipment for multi-sensors instrumentation platform): equipment platform for NDT (multi-element ultrasounds, X-ray tomography, Eddy current, etc) underpinned by academic and industrial partnership. 

Major technologies

Hybrid modelling and digital simulation for NDT

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Description

Simulation is a powerful tool for NDT especially in inspection methods, performance demonstration, and diagnosis assistance design phases.
Simulation new usages involve an intensive exploitation of codes (coupled to statistical algorithms, implementation into inversion schemes, etc.).List institute develops optimised simulation solutions based on hybrid models’ implementation coupling fast semi-analytical calculation and “all digital” methods (finite elements, finite differences, etc.).

Applications

Inspection design, methods’ technical qualification

 

Major projects

Publications

Instrumentation and adaptive imaging for multi-element ultrasounds

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Description

Multi-element ultrasound control methods offer increasing possibilities for default detection and inspected parts imaging. These technics are very sensitive to geometric local variations encountered during control process.
Adaptive imaging technics developed at List institute aim at integrating the gathered information on the part’s geometry in real time and to adapt consequently the ultrasonic waves and the applied treatments. Imaging algorithms exploit the signals emitted from the different pairs of transceivers on the transducers network. They can be applied on immersive or flexible sensors, a technology that is developed at List too. Their implementation on acquisition systems is made through collaborations with M2M Company. All these technics can be declined for metal or composite components.

Applications

Complex components control, diagnosis assistance

 

 

 

Major projects

Publications

X-ray tomography fast reconstruction

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Description

X-ray tomography is a booming inspection method. As a first challenge, we tackle acquisition time reduction to accelerate inspection cycles and increase equipment life cycles. Then the second challenge is to develop a specific treatment around areas of interest for big size parts’ control. Data reconstruction technologies developed at List give us the capacity to address these two challenges thanks to algebraic and probabilistic algorithms implementation. These algorithms help adding information about reconstruction space either through object knowledge either through simulation. These technologieswill also allow a better management of incomplete or scattered input data and the generation of parts gridded representations as output data. Coupled to these algorithms, out of standards trajectories are optimised around areas of interest thanks to simulation tools and methods. These technics are implemented on the X-ray tomography robotic cell allowing a great versatility of configurations.

Applications

Large size parts control with high surface-to-volume ratio, industrial applications (parts conformity control), medical applications (patient’s dose reduction), security applications (e-control, automatic detection of undesirables).

Major projects

Publications

  • M. Costin, A. Vabre, CIVA CT with Applications in Medical Imaging, Interdisciplinary Symposium on Signals and Systems for Medical Applications, Medical Imaging Workshop, Paris, 2013
  • F. Buyens, A. Vabre, J.G. Bobbe, G.J. Streekstra, Metal Artefact Reduction by Inpainting Process in X-Ray Tomography, IEEE, NSS/MIC/RTSD, Seoul, Corée, 2013