TY - GEN
T1 - Study on EMAT configuration for generating SH waves
AU - Hiramoto, Tatsuya
AU - Okazaki, Kodai
AU - Sugiura, Toshihiko
PY - 2014/1/1
Y1 - 2014/1/1
N2 - Shear-Horizontal guided wave is ideal for nondestructive testing due to its simple dispersion characteristics. To generate SH waves, Electro-Magnetic Acoustic Transducer (EMAT) is more suitable than traditional piezoelectric transducers. Instead of known EMAT configurations such as PPM (Periodic Permanent Magnet), we propose an another configuration, which arrays several coils whose windings reverse alternately; Four sets of coils are placed next to each other, and two magnets are set to apply a magnetic field. We calculated dispersion curves to know the group velocities and to decide the optimal input frequency. Further, we did experiments to excite the zeroth-order symmetric mode, the lowest mode of SH wave, on an aluminum plate.
AB - Shear-Horizontal guided wave is ideal for nondestructive testing due to its simple dispersion characteristics. To generate SH waves, Electro-Magnetic Acoustic Transducer (EMAT) is more suitable than traditional piezoelectric transducers. Instead of known EMAT configurations such as PPM (Periodic Permanent Magnet), we propose an another configuration, which arrays several coils whose windings reverse alternately; Four sets of coils are placed next to each other, and two magnets are set to apply a magnetic field. We calculated dispersion curves to know the group velocities and to decide the optimal input frequency. Further, we did experiments to excite the zeroth-order symmetric mode, the lowest mode of SH wave, on an aluminum plate.
KW - Dispersion Curves
KW - EMAT
KW - Shear-Horizontal Wave
KW - Ultrasonics
UR - http://www.scopus.com/inward/record.url?scp=84903197812&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84903197812&partnerID=8YFLogxK
U2 - 10.1063/1.4864853
DO - 10.1063/1.4864853
M3 - Conference contribution
AN - SCOPUS:84903197812
SN - 9780735412118
T3 - AIP Conference Proceedings
SP - 444
EP - 449
BT - 40th Annual Review of Progress in Quantitative Nondestructive Evaluation - Incorporating the 10th International Conference on Barkhausen Noise and Micromagnetic Testing
PB - American Institute of Physics Inc.
T2 - 40th Annual Review of Progress in Quantitative Nondestructive Evaluation, QNDE 2013, Incorporating the 10th International Conference on Barkhausen and Micro-Magnetics, ICBM 2013
Y2 - 21 July 2013 through 26 July 2013
ER -