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Improving the signal amplitude of meandering coil EMATs by using ribbon soft magnetic flux concentrators (MFC)
Published in
2011
PMID: 21376358
Volume: 51
   
Issue: 6
Pages: 675 - 682
Abstract
This paper presents a new method of improving the ultrasonic signal amplitude from a meander line EMAT by using soft magnetic alloy ribbon (Fe 60Ni10V10B20) as a magnetic flux concentrator (MFC). The flux concentrator is a thin soft amorphous magnetic material (Fe60Ni10V10B20) which is very sensitive to a small flux change. The MFC is used with the EMAT to improve the signal amplitude and it was observed that the peak signal amplitude increases by a factor of two compared to the signal without MFC. Two dimensional numerical models have been developed for the EMAT with MFC to quantify the improvement of the received signal amplitudes. Model calculations and experiments have been carried out for a wide range of ultrasonic frequencies (500 kHz-1 MHz) in different materials. © 2011 Elsevier B.V. All rights reserved.
About the journal
JournalUltrasonics
ISSN0041624X
Open AccessNo
Concepts (32)
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    Amorphous magnetic materials
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    FLUX CONCENTRATOR
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    MAGNETIC FLUX CONCENTRATOR (MFC)
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    MAGNETIC FLUX CONCENTRATORS
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    MEANDER COIL EMAT
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    MEANDER LINE
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    Model calculations
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    Received signals
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    Signal amplitude
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    SOFT MAGNETIC ALLOYS
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    SOFT MAGNETIC RIBBONS
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    Soft magnetics
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    Two dimensional numerical models
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    Ultrasonic frequency
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    Ultrasonic signals
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    Concentration (process)
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    LINE CONCENTRATORS
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    Lorentz force
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    Magnetic structure
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    Solar concentrators
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    Ultrasonics
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    Vanadium
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    Magnetic flux
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    Article
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    Magnetism
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    Methodology
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    Theoretical model
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    Transducer
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    Ultrasound
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    Magnetics
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    Models, theoretical
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    Transducers