Optimal Design Parameters for a Phased-Array-Based Ultrasonic Polar Scan

In the context of designing a next-generation ultrasonic polar scan (UPS) measurement system for viscoelastic material characterization, novel approach is proposed, which draws on set cylindrically focused emitters in conjunction with circular phased array (C-PA) receiver order to create portable while improving data quality and ease interpretation. To explore potential new determine its optimal design parameters, 3-D analytical model presented numerically simulate UPS experiments proposed system. Furthermore, postprocessing procedure worked out treat acquired raw aim deal integrating effect finite size transducers directly reconstruct angle-dependent plane wave reflection coefficients sample under study. As accuracy reconstruction heavily depends various parameter study focusing influence three main experimental parameters performed guide design. For each these studies, simulation results have been inverted, errors estimated C-tensor deduced. First, it shown that, given frequency, radius C-PA must be large enough capture both specular nonspecular reflected field, crucial assure correct characteristics find proper estimates parameters. Second, impact emitter lengths has investigated, yielding superior upon increasing either them. Finally, dedicated pitch elements angular range shows that aliasing effects disturb if too large. However, this can somewhat mitigated by employing multiple restricted range. Using knowledge abovementioned simulated experiment using cross-ply carbon epoxy laminate. The postprocessed based an excellent agreement theoretical results.