Influence of coil parameters on transduction performance of unidirectional EMATs for Rayleigh wave

Chen, Xiaoyang; Su, Riliang; Zhang, Heng; Wang, Shujuan; Zhai, Guofu

doi:10.1109/fendt.2013.6635546

Cited by 10 publications

(2 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Efficient unidirectional generation of ultrasonic waves is possible if two ultrasonic sources are separated by a quarterwavelength, /4, and excited by 90 o delayed pulses, which was previously used for generating other modes of ultrasonic waves with EMATs [13,14]. Conventional PPM EMATs do not support this principle of unidirectional generation, since the position and direction of forces are dictated by the magnets of the PPM array, which share the same racetrack coil underneath the magnet array.…”

Section: Introductionmentioning

confidence: 99%

Unidirectional Shear Horizontal Wave Generation With Side-Shifted Periodic Permanent Magnets Electromagnetic Acoustic Transducer

Kubrusly

Kang

Dixon

2020

IEEE Trans. Ultrason., Ferroelect., Freq. Contr.

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Unidirectional Shear Horizontal Wave Generation With Side-Shifted Periodic Permanent Magnets Electromagnetic Acoustic Transducer

Kubrusly

Kang

Dixon

2020

IEEE Trans. Ultrason., Ferroelect., Freq. Contr.

View full text Add to dashboard Cite

“…Considerable works were reported on the electromagnetic acoustic transducers (EMATs) simulation, which contained the electromagnetic model and the ultrasonic model [20][21][22][23]. In addition, significant works were reported on the effect of parameters, such as the dimension of the coil, the dimension of the magnet, and the lift-off, on the EMATs efficiency for the optimal design of EMATs [24][25][26][27]. Because 3-D modelling has a high demand of the computer capacity and requires significant running time, most of the previous work were 2-D simulation focusing on the x-y plane (i.e.…”

Section: Introductionmentioning

confidence: 99%

Directivity analysis of meander-line-coil EMATs with a wholly analytical method

et al. 2017

View full text Add to dashboard Cite

This paper presents the simulation and experimental study of the radiation pattern of a meander-line-coil EMAT. 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. For a specific sensor configuration, Lorentz forces are calculated using the EM analytical method, which is adapted from the classic Deeds and Dodd solution. The calculated Lorentz force density are imported to an analytical ultrasonic model as driven point sources, which produce the Rayleigh waves within a layered medium. The effect of the length of the meander-line-coil on the Rayleigh waves' beam directivity is analysed quantitatively and verified experimentally.

show abstract

The influence of coil parameters and core lamination factor on the performance of an ultrasonic transducer with a tapered core

Gandomzadeh

Abbaspour‐Fard

Rohani

et al. 2022

Int J Numerical Modelling

View full text Add to dashboard Cite

Due to high piezomagnetic coefficient of the synthetic giant magnetostrictive materials, they are able to provide good enough force and displacements for industrial applications. Some natural materials such as nickel also exhibit magnetostrictive properties, but with poor performance, which might be improved by some electromagnetic manipulations. In this study, the effect of different coil parameters such as current, frequency, the number of coil turn, and the core lamination factor in different directions ([X or Y] and Z axes), on the performance of a nickel-core magnetostrictive transducer is investigated. Since the fluctuation of magnetostrictive force in the longitudinal direction of core (along the Z-axis) is an important parameter for generating the ultrasonic waves, the results showed that this force fluctuation decreases with increasing frequency. By increasing the lamination factor in the X direction, the fluctuation of magnetostrictive force along the Z-axis remains constant. However, the ultrasonic performance of the magnetostrictive transducer may be optimized by proper selection of lamination factor along the X-axis. The relationships between the results were investigated in more detail and presented as linear equations. Based on these equations, it was concluded that current and turn number of coil has the greatest positive impact on the magnetostrictive performance of the transducer, while increasing the frequency and lamination factor have a weakening effect.

show abstract

Influence of coil parameters on transduction performance of unidirectional EMATs for Rayleigh wave

Cited by 10 publications

References 5 publications

Unidirectional Shear Horizontal Wave Generation With Side-Shifted Periodic Permanent Magnets Electromagnetic Acoustic Transducer

Unidirectional Shear Horizontal Wave Generation With Side-Shifted Periodic Permanent Magnets Electromagnetic Acoustic Transducer

Directivity analysis of meander-line-coil EMATs with a wholly analytical method

The influence of coil parameters and core lamination factor on the performance of an ultrasonic transducer with a tapered core

Contact Info

Product

Resources

About