Dos Santos, Serge; Institut National des Sciences Appliquees Centre Val de Loire; France
Dos Santos, S.; INSA Centre Val de Loire; France
Massod, A.; INSA Centre Val de Loire; France
Session: Nonlinear Ultrasonics 1
Time: 10:50 - 11:10
Nonlinear Ultraonics (US) has become increasingly important during the last forty years due to the increase of higher sensitivity of electronic instrumentation and its associate signal processing algorithm. The nonlinearity of materials results in nonlinear effects, which arise from defects in the materials. Applications include nonlinear nondestructive testing (NDT), harmonic medical ultrasound imaging and development of new materials such as nanocomposite and memory based materials. One of the strategic plan of the international NDT community is to define standards for developing nonlinear NDT for automated set-up in mass production.
The paper presents the calibration process of the TR-NEWS device which is associated to the development of a phenomenological characterization of material local elastic properties working at 50 MHz. The experimental device was tested with the V3 calibration block, improved and specially scaled in order to access to a wide range of parameters: mechanical properties, ultrasonic parameters (celerity and attenuation) and local geometric data, completed with complex mechanical loading of skin model (provided by industrial partners) and ex vivo skin, in a second time. The experimental set-up is completed by using modern ultrasonic memosducer components aim at describing memristive devices and systems. The ratio between the intrinsic (complex) impedance of the memristor and the input-impedance of the US transducer will be also discussed within the context of optimized reverberating configuration.
 S. Dos Santos and S. Furui, “A memristor based ultrasonic transducer: The memosducer,” 2016 IEEE International Ultrasonics Symposium (IUS), Tours, 2016, pp. 1-4. doi: 10.1109/ULTSYM.2016.7728885