Numerical simulations of an electromagnetic acoustic transducer-receiver system for NDT applications

1993 ◽  
Vol 29 (3) ◽  
pp. 2081-2089 ◽  
Author(s):  
R. Ludwig ◽  
Z. You ◽  
R. Palanisamy
Keyword(s):  
Numerical Simulations ◽  
Electromagnetic Acoustic Transducer ◽  
Acoustic Transducer ◽  
Receiver System

scholarly journals The Effect of Magnet-to-Coil Distance on the Performance Characteristics of EMATs

Sensors ◽  
2020 ◽  
Vol 20 (18) ◽  
pp. 5096
Author(s):  
Yutang Wu ◽  
Yunxin Wu
Keyword(s):  
Numerical Simulations ◽  
Conversion Efficiency ◽  
Performance Characteristics ◽  
Practical Application ◽  
Electromagnetic Acoustic Transducer ◽  
The Poor ◽  
Acoustic Transducer ◽  
Lift Off

The poor conversion efficiency and obvious lift-off effect of the electromagnetic acoustic transducer (EMAT) are commonly known to be problems for its practical application. For the purpose of enhancing the performance of EMATs, numerical simulations were performed in order to analyze the effect of various parameters. The results indicate that only the magnet-to-coil distance can effectively enhance the conversion efficiency and weaken the lift-off effect at the same time. When the magnet-to-coil distance is 2 mm, the lift-off effect will continue to be weakened as the magnet-to-coil distance increases, whereas the decrease of the lift-off effect is inconspicuous and the conversion efficiency starts to decline at this time. Therefore, to get the best performance of this specific EMAT, the suitable magnet-to-coil distance is 2 mm. The experiment effectively verifies the improvement of EMATs with a magnet-to-coil distance of 2 mm.

scholarly journals Development of shear-vertical-wave point-focusing electromagnetic acoustic transducer

2015 ◽  
Vol 54 (7S1) ◽  
pp. 07HC04 ◽  
Author(s):  
Takashi Takishita ◽  
Kazuhiro Ashida ◽  
Nobutomo Nakamura ◽  
Hirotsugu Ogi ◽  
Masahiko Hirao
Keyword(s):  
Electromagnetic Acoustic Transducer ◽  
Acoustic Transducer
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