TY - GEN
T1 - Research on influence of Lorentz force mechanism on EMAT's transduction efficiency in steel plate
AU - Shujuan, Wang
AU - Penghao, Xin
AU - Lei, Kang
AU - Guofu, Zhai
PY - 2010
Y1 - 2010
N2 - Electromagnetic acoustic technique shows great promise in defect detection and classification for being free of couplant, no requirement of surface preconditioning, and being able to excite pure surface acoustic wave, etc. However, the deficiency of designing theories of electromagnetic acoustic transducers (EMATs) makes its transduction efficiency poor. This paper makes improvement to EMAT design through modeling of the EMAT behavior in steel plate and analyzes the distribution regularity of the eddy current, magnetic field, and Lorentz force produced by a surface wave EMAT. The modeling study gives the influence of EMAT parameters on the energy density of surface wave and the relationship between main structural parameters of the EMAT and the transducer's transduction efficiency, which indicates that, decrease of lift-off distance, coil conductor's width, and magnet's bottom area, and increase of magnet's thickness could effectively improve the transduction efficiency of the EMAT. Finally, the validity and accuracy of the model is verified by experiment.
AB - Electromagnetic acoustic technique shows great promise in defect detection and classification for being free of couplant, no requirement of surface preconditioning, and being able to excite pure surface acoustic wave, etc. However, the deficiency of designing theories of electromagnetic acoustic transducers (EMATs) makes its transduction efficiency poor. This paper makes improvement to EMAT design through modeling of the EMAT behavior in steel plate and analyzes the distribution regularity of the eddy current, magnetic field, and Lorentz force produced by a surface wave EMAT. The modeling study gives the influence of EMAT parameters on the energy density of surface wave and the relationship between main structural parameters of the EMAT and the transducer's transduction efficiency, which indicates that, decrease of lift-off distance, coil conductor's width, and magnet's bottom area, and increase of magnet's thickness could effectively improve the transduction efficiency of the EMAT. Finally, the validity and accuracy of the model is verified by experiment.
KW - Electromagnetic acoustic ransducer
KW - Electromagnetic surface wave
KW - Surface detection of steel plate
KW - Transduction efficiency
UR - https://www.scopus.com/pages/publications/77956036028
U2 - 10.1109/ICIEA.2010.5516764
DO - 10.1109/ICIEA.2010.5516764
M3 - 会议稿件
AN - SCOPUS:77956036028
SN - 9781424450466
T3 - Proceedings of the 2010 5th IEEE Conference on Industrial Electronics and Applications, ICIEA 2010
SP - 196
EP - 201
BT - Proceedings of the 2010 5th IEEE Conference on Industrial Electronics and Applications, ICIEA 2010
T2 - 5th IEEE Conference on Industrial Electronics and Applications, ICIEA 2010
Y2 - 15 June 2010 through 17 June 2010
ER -