scholarly journals A wholly analytical method for the simulation of an electromagnetic acoustic transducer array

2016 ◽  
Vol 51 (4) ◽  
pp. 375-389 ◽  
Author(s):  
Yuedong Xie ◽  
Liyuan Yin ◽  
Rodriguez G. Sergio ◽  
Tiemei Yang ◽  
Zenghua Liu ◽  
...  
Keyword(s):  
Analytical Method ◽  
Electromagnetic Acoustic Transducer ◽  
Transducer Array ◽  
Acoustic Transducer

scholarly journals Simulation of an Electromagnetic Acoustic Transducer Array by Using Analytical Method and FDTD

2016 ◽  
Vol 2016 ◽  
pp. 1-10 ◽  
Author(s):  
Yuedong Xie ◽  
Sergio Rodriguez ◽  
Wenbo Zhang ◽  
Zenghua Liu ◽  
Wuliang Yin
Keyword(s):  
Analytical Solution ◽  
Time Domain ◽  
Fdtd Method ◽  
Force Density ◽  
Large Radius ◽  
Electromagnetic Acoustic Transducer ◽  
Transducer Array ◽  
Ultrasound Waves ◽  
Acoustic Transducer ◽  
Frequency Regime

Previously, we developed a method based on FEM and FDTD for the study of an Electromagnetic Acoustic Transducer Array (EMAT). This paper presents a new analytical solution to the eddy current problem for the meander coil used in an EMAT, which is adapted from the classic Deeds and Dodd solution originally intended for circular coils. The analytical solution resulting from this novel adaptation exploits the large radius extrapolation and shows several advantages over the finite element method (FEM), especially in the higher frequency regime. The calculated Lorentz force density from the analytical EM solver is then coupled to the ultrasonic simulations, which exploit the finite-difference time-domain (FDTD) method to describe the propagation of ultrasound waves, in particular for Rayleigh waves. Radiation pattern obtained with Hilbert transform on time-domain waveforms is proposed to characterise the sensor in terms of its beam directivity and field distribution along the steering angle, which can produce performance parameters for an EMAT array, facilitating the optimum design of such sensors.

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