Modeling of 3D Electro-Mechanical Wave Propagation in 1-3 Piezocomposite based Ultrasonic Sensors: Simulation and Experimental Comparison

Speaker:
Kolkoori, Sanjeevareddy; ROSEN Technology and Research Center GmbH; Germany

Authors:
Kolkoori, S.; ROSEN Technology and Research Center GmbH; Germany
Koch, R.H.; ROSEN Technology and Research Center GmbH; Germany

ID: ECNDT-0053-2018
Download: PDF
Session: Modelling & data processing - UT
Room: J2
Date: 2018-06-13
Time: 15:40 - 16:00

Quantitative modeling tools are important in design and fabrication of ultrasonic sensors with optimum characteristics and reduce the number of experimental efforts. This paper describes a computationally efficient 3D time-domain finite element modeling of electro-mechanical wave propagation in 1-3 piezocompoiste based ultrasonic sensors using the PZFlex software. First, we demonstrate the full 1-3 piezocomposite transducer design, which includes the standard dice-and-fill technique, electrical impedance matching layers, backing materials, electrical circuit of a coaxial cable and the coupling medium. The accuracy of electrical, mechanical and dielectric properties of a piezoceramic material are verified and optimized by comparing the simulated electrical impedance results with experiments, quantitatively. The acoustical properties of two-phase backing materials are analyzed to obtain the optimum volume fraction of heavy metal inclusions in the epoxy matrix. These acoustical properties are further incorporated in the transducer model to improve the accuracy of simulation results. The simulated ultrasonic pulse-echo results are compared with laboratory experiments and a good quantitative agreement is achieved. Finally, we discuss the applications of developed ultrasonic sensors in the Oil & Gas industry.