Residual strain measurement based on longitudinal to shear wave velocity ratio with a dual-mode EMAT
Frontiers in Materials, 2023 In this paper, a new and noncontact method with measuring longitudinal to shear wave velocity ratio by a dual-mode electromagnetic acoustic transducer is proposed for residual strain measurement in a metal structure without knowing its thickness. Firstly,
Geng Dang +4 more
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Sensors, 2023 Periodic permanent magnet(PPM) electromagnetic acoustic transducers (EMATs) are commonly employed for axial defect inspection in pipelines.
Xu Zhang +7 more
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Optimization of the Parameters of the Magnetizing Device of the Electromagnetic-Acoustic Transducer
Приборы и методы измерений, 2023 Contactless electromagnetic-acoustic transducers have a set of significant advantages over contact transducers, but at the same time they have significant disadvantages that require the development of effective magnetizing devices.
V. A. Strizhak, A. V. Pryakhin
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Perfecting evaluation methods of energy equipment technical condition and resource based on electromagnetic-acoustic effect [PDF]
E3S Web of Conferences, 2019 To assess the technical condition and resource for the safe operation of electric and electrical equipment, it is proposed to use the electromagnetic-acoustic effect and the dynamic identification method based on the analysis of the coordinates of the ...
Bashirov M.G. +5 more
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Phased electromagnetic acoustic transducer array for Rayleigh wave surface defect detection [PDF]
, 2020 A phased electromagnetic acoustic transducer (EMAT) array system has been developed for detection and characterisation of surface breaking defects. An array of four linear coils which are individually controlled are used to generate a Rayleigh wave.
Dixon, S. +3 more
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Determining the effect of the duration of alternating acoustic excitation on electromagnetic response parameters of the composite [PDF]
, 2016 The paper presents the results of the experimental investigation dealing with the effect of the alternating excitation acoustic pulse duration on the parameters of the electromagnetic emission caused by interaction of acoustic vibrations with ...
Surzhikov, Vladimir Petrovich +2 more
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Orthogonal Optimal Design Method for Spiral Coil EMAT Considering Lift-off Effect: A Case Study
IEEE Access, 2021 This paper provided a method to improve the conversion efficiency and lessen the lift-off effect of spiral coil electromagnetic acoustic transducer (EMAT) for some specific situations, for example, irregular sample surface, online inspection and varying ...
Yutang Wu, Yunxin Wu
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EMAT Generated Guided Waves in Pipes
e-Journal of Nondestructive Testing, 2023 Pipeline integrity is a must to maintain for the oil and gas industry to avoid downtimes in case of disastrous events. Following this line, pipelines are periodically inspected to know their condition and make timely decisions for replacement or repair.
Azhar Memon, Luai M. Alhems
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A New Design of the Dual-Mode and Pure Longitudinal EMAT by Using a Radial-Flux-Focusing Magnet
Sensors, 2022 An electromagnetic acoustic transducer (EMAT) is suitable for measuring the propagation time more accurately without causing abrasion to the transducer during testing due to the principle of its excitation.
Xu Zhang +7 more
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Magnetic phase transitions in Gd64Sc36 studied using non-contact ultrasonics [PDF]
, 2012 The speed and attenuation of ultrasound propagation can be used to determine material properties and identify phase transitions. Standard ultrasonic contact techniques are not always convenient due to the necessity of using couplant; however, recently ...
Andrianov A B +17 more
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