Title :
Modeling and comparison of three bulk wave EMATs
Author :
Wang Shujuan ; Li Zhichao ; Kang Lei ; Hu Xiaoguang ; Zhang Xiao
Author_Institution :
Sch. of Electr. Eng. & Autom., Harbin Inst. of Technol., Harbin, China
Abstract :
To study the sound field features of bulk wave electromagnetic acoustic transducers (EMATs), a novel modeling method is proposed by combining numerical solutions with analytical calculations. Three commonly used bulk wave EMATs operating on the Lorentz principle have been modeled with consideration of the influence of dynamic magnetic fields generated by EMATs. Simulation and comparison show that double-spiral-coil EMATs have stronger detectability due to their smaller divergence angles and more intensive energy distribution. The accuracy of the established models is verified by experiments.
Keywords :
acoustic field; acoustic transducers; bulk acoustic wave devices; numerical analysis; Lorentz principle; bulk wave EMAT; bulk wave electromagnetic acoustic transducers; divergence angles; double-spiral-coil EMAT; dynamic magnetic fields; intensive energy distribution; numerical solutions; sound field; Aluminum; Atmospheric modeling; Coils; Finite element methods; Lorentz covariance; Magnetic fields; Solid modeling; Bulk wave; EMATs; Lorentz principle; finite element method;
Conference_Titel :
IECON 2011 - 37th Annual Conference on IEEE Industrial Electronics Society
Conference_Location :
Melbourne, VIC
Print_ISBN :
978-1-61284-969-0
DOI :
10.1109/IECON.2011.6119728
