TPIA Group

The acoustic and ultrasonic activity of the TPIA group concerns the field of physical acoustics, and the research themes are globally aimed at understanding the phenomena of interaction of ultrasonic waves with matter.

Coordinator : Frédéric JENOT

Permanent : Jamal ASSAAD, Farouk BENMEDDOUR, Lynda CHEHAMI, Meriem CHRIFI ALAOUI, Christophe DELEBARRE, Marc  DUQUENNOY, Frédéric JENOT, Emmanuel MOULIN, Mohammadi OUAFTOUH, Mohamed OURAK, Bogdan PIWAKOWSKI, Wei-Jiang XU

Doctors : H. Achdjian (<01/15), H. Alhousseini (<01/21), W. Ben Khalifa (<04/13), M. Baher, R. Bahouth, L. Chehami (<01/16), B. Chen (<08/19), C. Ciccarone (<11/20), T. Druet (<12/17), H. El Rammouz (<03/21), F. Faese (<01/14),         D. Fall (<05/16), S. Fourez (<06/13), A. Hadji, S. Hebaz (<07/18), H. Hoang (<12/20), K. Hourany (<01/16), T. Kadi (<07/21), M. Karam, M. Kiassi, K. I. Kossonou (<06/14), B. Lafarge (<07/18), J. Li (<01/18), Q. Liu (<01/15), N. Maglaoui (<05/15), B. Ndao (<01/17), S. Ndao (<03/20), V. Nowinski (<08/16), M. Robin (<08/19), L. Sadoudi (<08/16), F. Smime (<12/18), R. Takpara (<01/16), M. Terzi

Presentation

The acoustic and ultrasonic activity of the TPIA group concerns the field of physical acoustics and the research themes aim globally at understanding the phenomena of interaction of ultrasonic waves with matter, at proposing different analysis methods (inverse problems) adapted to the monitoring of the integrity of structures and properties of materials, at modeling the behavior of ultrasonic sources and their interactions with the surrounding materials and at developing tools allowing an optimal design of systems.

The cutting-edge research conducted in the TPIA group is based on skills and know-how enriched for more than 35 years, within the Opto-Acousto-Electronics department (IEMN - Valenciennes site), in the field of ultrasound and its interactions with matter. The research work covers both the upstream aspects of fundamental research in the field, as well as technological innovations at the level of systems, and also R&D developments falling under the expression of industrial needs.

Heavily influenced by a research tradition developed within the NDT (Non Destructive Testing) and TRUST (TRansducteurs Ultrasonores : Sécurité dans le Transport) teams, the group's research themes are very open to technological developments (microelectronics, MEMS) and address subjects of a fundamental nature or arising from industrial needs by adopting, in both cases, a balanced approach between modeling, experimentation and resolution of inverse problems.

These topics take all their importance in particular with the emergence of new materials such as those with functional surfaces (coated with thin or fine layers) or with gradient properties (commonly used in the field of transport for example). They are also fully in line with the socio-economic issues related to industrial developments such as those related to Non Destructive Testing methods.

TPIA Group publications

Research themes

The themes of the group are related to the Sciences For the Engineer (SPI) and are articulated around three coherent and complementary themes whose base is the Non Destructive Testing:

  • Ultrasonic translation and sensors
  • Propagation - Guided Acoustics and inverse problems
  • Distributed Sensor Acoustic Imaging

These research activities allow the TPIA group to cover a wide spectrum in the field of ultrasound as they range from the generation of various types of waves to the solution of inverse problems and acoustic imaging. Our themes are well established and have their own sources of funding and collaborations.

The "Transduction and Sensors" theme focuses on the development and optimization of ultrasonic transducers and sensors for characterization and non-destructive testing.

The "transduction" part of this theme concerns in particular the development of interdigital transducers of SAW (Surface Acoustic Wave) type to generate surface or guided ultrasonic waves over a wide frequency range (20-300 MHz).

This solution allows, via these remote IDT transducers, to characterize the surfaces of structures without altering them and to consider characterizations of fragile or transparent surfaces. Depending on the characterizations different transducer configurations are developed (single frequency, broadband) and several excitations can be considered (pulse, burst, chirp, etc.). The Wavesurf platform allows the implementation of these transducers. In addition, it also involves the development of single or multi-element high-frequency piezoelectric transducers and PMUT-type arrays beyond 20 MHz.

The "Ultrasonic Sensors" component mainly concerns the development of SAW (Surface Acoustic Wave) sensors sensitive to various characteristics such as, for example, monitoring of humidity and pressure at high temperatures for in situ monitoring applications of concrete. Research is also being conducted to make these sensors flexible and/or autonomous and communicating wirelessly.

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Figure 1: Characterization of SAW sensors

The "Propagation - Guided Acoustics and Inverse Problems" theme aims to improve and optimize the characterization of various structures by exploiting the properties of surface and guided acoustic waves. The resulting applications affect many sectors of activity ranging from microelectronics to transportation.

The implemented excitation and detection methods can be with or without contact in pulse or harmonic regime. The samples considered cover a wide range from granular media (as in the ANR SENSO project) to thin films.

The originality of the work done is often in the inversion methods used as for the V(z) technique. It can also lie in the characterization procedures and/or devices developed. For example, the use of Laser Ultrasound (LU) coupled with original solutions of inversion and signal processing has allowed to strongly optimize the exploitation of the acoustic information collected.

In particular, the ANR ECOCND project confirmed the importance of these studies with a control objective. New avenues in terms of surface functionalization have also been explored. In addition, interdigital surface wave sensors have been shown to be a precursor for the determination of residual stress levels in certain materials.

Original in design, they have consequently led to a patent application. On the other hand, the studies conducted on the Lamb wave-damage couple have led to very good results and suggest consequent perspectives.

Figure 2: Guided mode dispersion curves in a layer-on-substrate structure obtained by Laser Ultrasonics

The "Acoustic imaging by distributed sensors" theme concerns damage detection and imaging in reverberant and complex environments. The objective here is to propose innovative methods for the health control and monitoring of components of complex geometries structures (aeronautical wings and hulls, automotive bodies, railway components, hydraulic systems...).

One of the main ideas is to exploit acoustic signals in all their complexity, in order to extract the maximum information from a limited number of sensors. Ultrasonic codas, in particular, from multiple, interleaved propagation paths in structures offer new perspectives.

In particular, the possibility of using natural acoustic sources (still called "ambient" sources or "opportunity sources") instead of the emission of ultrasonic waves classically used in traditional Nondestructive Testing techniques, opens the way to the use of passive ultrasonic sensor networks (receivers only), thus low power and potentially autonomous and low-intrusive.

In a transport environment, in particular, where many "natural" acoustic and vibratory sources exist (engines, aerodynamic noise, wheel-rail contacts, fluid-structure interactions...), the applications of this work are potentially numerous. This theme is now well established and enjoys a notable recognition in the transdisciplinary community of "ambient field correlation imaging".

Figure 3: Damage detection using passive acoustic method

Fields of competence and expertise

  • Non-Destructive Testing
  • Integrated Health Check
  • Residual Stress Estimation - Acoustoelasticity > pdf : Acoustoelasticity - Residual Stress Estimation
  • Acoustic material signature, V(z)
  • Ultrasonic resonance spectroscopy of surface waves
  • Ultrasound-Laser

Thesis or internship topics

The thesis topics proposed by the TPIA group are notably disseminated on the PHF Doctoral School website ( https://www.adum.fr/as/ed/proposition.pl ). They generally relate to the specialties "Acoustics" and "Micro-nano systems and sensors".

Training through research

The members of the TPIA group are strongly involved in IPS-related teaching at INSA Hauts-de-France.

Collaborations

Academic collaborations

  • European project:

ALAMSA: University of Bath (UK)
CUBISM and TRANSPORT (Bel. and Fr.) 

ANR

DACLOS (JCJC)
ECOCND: CEA LIST, Institute of Welding
PASNI: Institut Langevin (ESPCI), INSA Lyon-LaMCoS     
PANSCAN : Langevin Institute (ESPCI), INSA Lyon-LaMCoS
. SENSO : IFSTTAR, I2M (Bordeaux), LMDC (INSA Toulouse), LCND (Univ. Méditerranée)
ENDE: IFSTTAR, I2M, LMDC, LCND, ISTERRE
OVMI: ONERA, GDF SUEZ OVMI : ONERA, GIPSA, SATIE
IN-ART : LPPI, I2M, LMDC, LCND, ISTERRE IN-ART : LPPI, ONERA

  • Hubert Curien Program: Catholic University of Leuven (Bel.)
  • ACDC-C2D2 project: LMA-LCND, LMDC, I2M, IFSTTAR

HF transducer project: School of Microelectronics of Fudan University (Shanghai, Ch.), FEMTO-ST (RTB network), Tongji University (Shanghai, Ch.).

Industrial collaborations

  • European Project:

PRISTIMAT & PRISTIFLEX : CRITT MDTS, INISMA (Bel.), SIRRIS (Bel.)

  • ANR:

ECOCND: IXTREM, HOLO3
ENDE : EDF, MISTRAS
PASNI : EADS
SENSO : EDF, GETEC, EXAM -BTP, SOVEP

  • CIFRE theses: VALLOUREC, SKF AEROSPACE, SOBEN
  • IRT Railenium thesis (CUSCIF project)
  • ACDC-C2D2 project: EDF
  • Feasibility studies:

ADES (Fr.), CTIF (Fr.), EDF (Fr.), NCA TECHNOLOGIES (Bel.), CEV VALLOUREC (Fr.), ST GOBAIN GLASS (Fr. & Bel.), GLAVERBEL (Bel.), AIRBUS (Fr.), SKF (Fr.), CLARIANCE (Fr.)

Support

Europe, State, Hauts-de-France Region: ERDF, Interreg, FP7, ANR, OSEO, (Arcir CECET), CPER CISIT, CPER ELSAT, IRT RAILENIUM, FR CNRS TTM

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