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Modélisation de systèmes ultrasonores avec VHDL-AMS : Application à la mesure du paramètre de non linéarité B/A

Abstract : This thesis abords ultrasound modelling systems with VHDL-AMS. Goal is prediction of a measurement cell behaviour dedicated to ultrasound non linearity measurements. To preview in a near future miniaturisation and conception of a measurement system which performances could be estimated with ours models, we proceed by a decomposition of the measurement system with associating to each elements a behavioural model developed in VHDL-AMS language. Originality of ours works is the integration of the non linearity parameter B/A in the propagation medium modelling. Simulation results are rigorously compared to implantation in Matlab and PSPICE software and in vitro measurement. This work is divided in 4 parts : State of the art of the ultrasound modelling systems ; Theoretical analysis of the non linear propagation and measurement methods of the parameter B/A ; Piezoceramic transducers and non linear medium modelling with VHDL-AMS ; Modelling and conception of a non linearity measurement cell in pulse-echo and transmission mode. Results obtained show that a medium could be characterized as function to the B/A parameter estimated with different biological and liquid mediums. Perspectives open by this work has been highlighted by scientific community members at different international congress.
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Theses
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http://docnum.univ-lorraine.fr/prive/SCD_T_2006_0047_GUELAZ.pdf
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https://hal.univ-lorraine.fr/tel-01746620
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Submitted on : Thursday, March 29, 2018 - 10:41:25 AM
Last modification on : Wednesday, March 11, 2020 - 2:10:05 PM

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  • HAL Id : tel-01746620, version 1

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Rachid Guelaz. Modélisation de systèmes ultrasonores avec VHDL-AMS : Application à la mesure du paramètre de non linéarité B/A. Autre. Université Henri Poincaré - Nancy 1, 2006. Français. ⟨NNT : 2006NAN10047⟩. ⟨tel-01746620⟩

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