Proceedings ArticleDOI
A new surface-wave EMAT design of enhanced transduction efficiency
Lei Kang,Feng Pan,Riliang Su,Chao Zhang,Jingmin Dai +4 more
- pp 9-13
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TLDR
In this article, a new surface-wave EMAT design, whose magnet width is less than the coil, is proposed, which takes advantage of both horizontal and vertical magnetic fields of the magnet.Abstract:
One of the main drawbacks of EMATs is their inefficiency in generating ultrasounds. To solve this problem, a new surface-wave EMAT design, whose magnet width is less than the coil, is proposed. The principle of the new EMAT is studied based on finite element simulation, which indicates that the EMAT is more efficient by taking advantage of both horizontal and vertical magnetic fields of the magnet. Experiment verified that the amplitude of the ultrasonic signal generated by the EMAT has been enhanced by about 53.7%. The potentials and limitations of the new design have also been discussed.read more
Citations
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Journal ArticleDOI
Directivity analysis of meander-line-coil EMATs with a wholly analytical method.
TL;DR: A wholly analytical method, which involves the coupling of two models: an analytical EM model and an analytical UT model, has been developed to build EMAT models and analyse the Rayleigh waves’ beam directivity.
References
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Journal ArticleDOI
Optimal design of EMAT transmitters
Koorosh Mirkhani,Chris Chaggares,Chris Masterson,Maciej Jastrzebski,Tomas Dusatko,Anthony N. Sinclair,Reza Jafari Shapoorabadi,A. Konrad,Marcello Papini +8 more
TL;DR: In this paper, a three-part finite element model is developed that characterizes the ultrasonic pulse produced by an electromagnetic acoustic transducer (EMAT), which is used to optimize the design of the EMAT system.
Journal ArticleDOI
Enhancement of signal amplitude of surface wave EMATs based on 3-D simulation analysis and orthogonal test method
TL;DR: In this paper, the transmission process of a surface wave EMAT is studied, based on a previously established 3D model, with the aim of enhancing the amplitude of ultrasonic waves generated by the EMAT.
Journal ArticleDOI
Numerical and experimental analysis of unidirectional meander-line coil electromagnetic acoustic transducers
TL;DR: A unidirectional EMAT with two meander-line coils is proposed, and a finite element model is used to simulate the directivity of the Rayleigh and shear vertical waves generated by these EMATs.
Journal ArticleDOI
3-D modeling and analysis of meander-line-coil surface wave EMATs
TL;DR: In this article, a 3D model for meander-line-coil surface wave EMATs operating on the Lorentz principle is proposed by combining numerical calculations and analytical solutions with special attention to the influence of the dynamic magnetic field.
Journal ArticleDOI
Optimal Design of Lamb Wave Electromagnetic Acoustic Transducers for Improving Their Excitation Performance
TL;DR: In this paper, an optimal design method for improving the excitation performance of the Lamb wave electromagnetic acoustic transducers (EMATs) is proposed to minimize the influence of multi-mode and dispersion and to increase the signal strength of Lamb waves concurrently.