Miniaturised SH EMATs for fast robotic screening of wall thinning in steel plates

O Trushkevych; M Tabatabaeipour; S Dixon; MDG Potter; G Dobie; C MacLeod; RS Edwards

doi:10.1109/JSEN.2020.3021526

Miniaturised SH EMATs for fast robotic screening of wall thinning in steel plates

O Trushkevych, M Tabatabaeipour, S Dixon, MDG Potter, G Dobie, C MacLeod, RS Edwards

Research output: Contribution to journal › Article

1 Downloads (Pure)

Abstract

Electromagnetic acoustic transducers (EMATs) are well suited to generating and detecting a variety of different ultrasonic wavemodes, without the need for couplant, and they can be operated through some coatings. EMATs can be used to generate shear horizontal (SH) waves, which show promise for fast screening of wall thinning and other defects. However, commercial SH-wave EMATs are not suitable for robotic implementation on ferritic steel due to the large magnetic drag force from the magnets. This paper describes the design and characterisation of miniaturised SH-wave EMATs, which significantly reduce the magnetic drag and enable mounting onto a small crawler robot for sample scanning. The performance of the miniaturised EMATs is characterised and compared to a commercial EMAT. It is shown that signal to noise ratio is reduced, but remains within a suitable range. The bandwidth and directivity are increased, depending on the exact design used. Their ability to detect flat bottomed holes mimicking wall thinning is also tested.

Original language	English
Number of pages	9
Journal	IEEE Sensors Journal
Early online date	3 Sep 2020
DOIs	https://doi.org/10.1109/JSEN.2020.3021526
Publication status	E-pub ahead of print - 3 Sep 2020

Keywords

condition monitoring
ultrasonic transducers
electromagnetic devices
non-destructive testing

Access to Document

10.1109/JSEN.2020.3021526

Trushkevych-etal-IEEE-Sensors-2020-Miniaturised-SH-EMATs-for-fast-robotic-screening-of-wall-thinningAccepted author manuscript, 911 KB

Fingerprint Dive into the research topics of 'Miniaturised SH EMATs for fast robotic screening of wall thinning in steel plates'. Together they form a unique fingerprint.

Cite this

Trushkevych, O., Tabatabaeipour, M., Dixon, S., Potter, MDG., Dobie, G., MacLeod, C., & Edwards, RS. (2020). Miniaturised SH EMATs for fast robotic screening of wall thinning in steel plates. IEEE Sensors Journal. https://doi.org/10.1109/JSEN.2020.3021526

@article{6030b7d4ba8e4661a3fe162b9cdb8ec8,

title = "Miniaturised SH EMATs for fast robotic screening of wall thinning in steel plates",

abstract = "Electromagnetic acoustic transducers (EMATs) are well suited to generating and detecting a variety of different ultrasonic wavemodes, without the need for couplant, and they can be operated through some coatings. EMATs can be used to generate shear horizontal (SH) waves, which show promise for fast screening of wall thinning and other defects. However, commercial SH-wave EMATs are not suitable for robotic implementation on ferritic steel due to the large magnetic drag force from the magnets. This paper describes the design and characterisation of miniaturised SH-wave EMATs, which significantly reduce the magnetic drag and enable mounting onto a small crawler robot for sample scanning. The performance of the miniaturised EMATs is characterised and compared to a commercial EMAT. It is shown that signal to noise ratio is reduced, but remains within a suitable range. The bandwidth and directivity are increased, depending on the exact design used. Their ability to detect flat bottomed holes mimicking wall thinning is also tested.",

keywords = "condition monitoring, ultrasonic transducers, electromagnetic devices, non-destructive testing",

author = "O Trushkevych and M Tabatabaeipour and S Dixon and MDG Potter and G Dobie and C MacLeod and RS Edwards",

note = "{\textcopyright} 2020 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting /republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.",

year = "2020",

month = sep,

day = "3",

doi = "10.1109/JSEN.2020.3021526",

language = "English",

journal = "IEEE Sensors Journal",

issn = "1530-437X",

}

TY - JOUR

T1 - Miniaturised SH EMATs for fast robotic screening of wall thinning in steel plates

AU - Trushkevych, O

AU - Tabatabaeipour, M

AU - Dixon, S

AU - Potter, MDG

AU - Dobie, G

AU - MacLeod, C

AU - Edwards, RS

N1 - © 2020 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting /republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.

PY - 2020/9/3

Y1 - 2020/9/3

N2 - Electromagnetic acoustic transducers (EMATs) are well suited to generating and detecting a variety of different ultrasonic wavemodes, without the need for couplant, and they can be operated through some coatings. EMATs can be used to generate shear horizontal (SH) waves, which show promise for fast screening of wall thinning and other defects. However, commercial SH-wave EMATs are not suitable for robotic implementation on ferritic steel due to the large magnetic drag force from the magnets. This paper describes the design and characterisation of miniaturised SH-wave EMATs, which significantly reduce the magnetic drag and enable mounting onto a small crawler robot for sample scanning. The performance of the miniaturised EMATs is characterised and compared to a commercial EMAT. It is shown that signal to noise ratio is reduced, but remains within a suitable range. The bandwidth and directivity are increased, depending on the exact design used. Their ability to detect flat bottomed holes mimicking wall thinning is also tested.

AB - Electromagnetic acoustic transducers (EMATs) are well suited to generating and detecting a variety of different ultrasonic wavemodes, without the need for couplant, and they can be operated through some coatings. EMATs can be used to generate shear horizontal (SH) waves, which show promise for fast screening of wall thinning and other defects. However, commercial SH-wave EMATs are not suitable for robotic implementation on ferritic steel due to the large magnetic drag force from the magnets. This paper describes the design and characterisation of miniaturised SH-wave EMATs, which significantly reduce the magnetic drag and enable mounting onto a small crawler robot for sample scanning. The performance of the miniaturised EMATs is characterised and compared to a commercial EMAT. It is shown that signal to noise ratio is reduced, but remains within a suitable range. The bandwidth and directivity are increased, depending on the exact design used. Their ability to detect flat bottomed holes mimicking wall thinning is also tested.

KW - condition monitoring

KW - ultrasonic transducers

KW - electromagnetic devices

KW - non-destructive testing

U2 - 10.1109/JSEN.2020.3021526

DO - 10.1109/JSEN.2020.3021526

M3 - Article

JO - IEEE Sensors Journal

JF - IEEE Sensors Journal

SN - 1530-437X

ER -