TY - JOUR
T1 - Design of a new type of omnidirectional shear-horizontal EMAT by the use of half-ring magnets and PCB technology
AU - Zhang, Yinghong
AU - Liu, Wenlong
AU - Li, Nian
AU - Qian, Zhenghua
AU - Wang, Bin
AU - Liu, Dianzi
AU - Li, Xiangyu
PY - 2021/8
Y1 - 2021/8
N2 - In this paper, an electromagnetic acoustic transducer (EMAT) for generating and receiving omnidirectional shear-horizontal (OSH) wave in aluminum plate is developed. The proposed OSH-EMAT consists of a specially designed printed circuit board (PCB) coil and a pair of half-ring magnets. Vertical oriented static magnetic field and the radial alternative eddy current are applied to excite the Lorentz force along the circumferential direction. A three-dimensional finite element model has been established to simulate the distributions of the static magnetic flux, the eddy current, and the exciting process of SH wave. Further experimental results show that the proposed electromagnetic ultrasonic transducer has good consistency in the performance of omnidirectional excitation and reception. The new OSH-EMAT design has the potential for many non-destructive testing applications owing to its low cost, acceptable accuracy and convenient processing and fabrication.
AB - In this paper, an electromagnetic acoustic transducer (EMAT) for generating and receiving omnidirectional shear-horizontal (OSH) wave in aluminum plate is developed. The proposed OSH-EMAT consists of a specially designed printed circuit board (PCB) coil and a pair of half-ring magnets. Vertical oriented static magnetic field and the radial alternative eddy current are applied to excite the Lorentz force along the circumferential direction. A three-dimensional finite element model has been established to simulate the distributions of the static magnetic flux, the eddy current, and the exciting process of SH wave. Further experimental results show that the proposed electromagnetic ultrasonic transducer has good consistency in the performance of omnidirectional excitation and reception. The new OSH-EMAT design has the potential for many non-destructive testing applications owing to its low cost, acceptable accuracy and convenient processing and fabrication.
KW - Electromagnetic acoustic transducer
KW - Guided wave
KW - Omnidirectional transducer
KW - Shear-horizontal wave
UR - http://www.scopus.com/inward/record.url?scp=85106337778&partnerID=8YFLogxK
U2 - 10.1016/j.ultras.2021.106465
DO - 10.1016/j.ultras.2021.106465
M3 - Article
VL - 115
JO - Ultrasonics
JF - Ultrasonics
M1 - 106465
ER -