Numerical evaluation of focal position selection by line-focusing electromagnetic acoustic transducer with experimental validation
نویسندگان
چکیده
منابع مشابه
Experimental and numerical evaluation of electromagnetic acoustic transducer performance on steel materials
Electromagnetic Acoustic Transducers (EMATs) are an attractive alternative to standard piezoelectric probes in a number of applications thanks to their contactless nature. EMATs do not require any couplant liquid and are able to generate a wide range of wave-modes; however these positive features are partly counterbalanced by a relatively low signal-to-noise ratio and by the dependence of EMAT ...
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A novel multistage numerical modeling approach to simulate acoustic-wave generation and propagation of an electromagnetic acoustic transducer (EMAT) is presented. The model assumes a uniform static magnetic field in a conducting half-space. A meander coil winding situated above the half-space is driven by a transient high-frequency current pulse. The numerically computed eddy currents in the co...
متن کاملUltrasonic Surface Examinations Using Electromagnetic Acoustic Transducer (EMAT) Techniques
1.1 This test method covers guidelines for utilizing EMAT techniques for detecting material discontinuities that are primarily open to the surface (for example, cracks, seams, laps, cold shuts, laminations, through leaks, lack of fusion). This technique can also be sensitive to flaws and discontinuities that are not surface-breaking, provided their proximity to the surface is less than or equal...
متن کاملManipulation of acoustic focusing with an active and configurable planar metasurface transducer
It has a pivotal role in medical science and in industry to concentrate the acoustic energy created with piezoelectric transducers (PTs) into a specific area. However, previous researches seldom consider the focal resolution, whose focal size is much larger than one wavelength. Furthermore, there is to date no such design method of PTs that allows a large degree of freedom to achieve designed f...
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ژورنال
عنوان ژورنال: International Journal of Applied Electromagnetics and Mechanics
سال: 2019
ISSN: 1383-5416,1875-8800
DOI: 10.3233/jae-190021