3D simulation and experiment on high speed rail MFL inspection

Antipov, A. G.; Markov, А. A.

doi:10.1016/j.ndteint.2018.04.011

Cited by 55 publications

(14 citation statements)

References 7 publications

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“…The magnetic Reynolds number for this type of problem is in the order of hundreds (>> 1), which indicates the effect of eddy current cannot be neglected [2]. The distortion of the magnetic field under different scanning velocity is widely reported [3,4,5,6,7,8] and it is sensitive to the specimen movement direction, as demonstrated in our previous research [9] and is independent to the orientation of the magnetizing source. This signal deformation can influence the efficiency of the NDT, especially for determining the defect location and its severity.…”

Section: Introductionmentioning

confidence: 67%

Effect of scanning acceleration on the leakage signal in magnetic flux leakage type of non-destructive testing

Zhang¹,

Cameron²,

Ledger³

et al. 2019

Preprint

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This novel work investigates the influence of the inspection system acceleration on the leakage signal in magnetic flux leakage type of non-destructive testing.The research is addressed both through designed experiments and simulations.The results showed that the leakage signal, represented by using peak to peak value, decreases between 20% and 30% under acceleration. The simulation results indicated that the main reason for the decrease is due to the difference in the distortion of the magnetic field for cases with and without acceleration, which is the result of the different eddy current distributions in the specimen.The findings will help to allow the optimisation of the MFL system to ensure the main defect features can be measured accurately during the machine acceleration. It also shows the importance of conducting measurements at constant velocity, wherever possible.

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Section: Introductionmentioning

confidence: 67%

Effect of scanning acceleration on the leakage signal in magnetic flux leakage type of non-destructive testing

Zhang¹,

Cameron²,

Ledger³

et al. 2019

Preprint

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“…The distortion of the magnetic field can cause the displacement of the maximum peak to peak location, towards the rear pole of the system, as discussed by Zhang et al [24]. This result was also demonstrated by Antipov [27]: the sensor is better located nearer to the rear pole, especially for higher scanning velocity. To compensate for the leakage signal reduction due to the velocity effect, Park et al [17] developed a scheme to eliminate the velocity induced signal distortion.…”

Section: Introductionmentioning

confidence: 69%

Effect of Scanning Acceleration on the Leakage Signal in Magnetic Flux Leakage Type of Non-destructive Testing

et al. 2023

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This work investigates the influence of acceleration on the leakage signal in magnetic flux leakage type of non-destructive testing. The research is addressed through both designed experiments and simulations. The results showed that the leakage signal, represented by using peak to peak value, decreases between 15.1% and 26.6% under acceleration. The simulation results indicated that the main reason for the decrease is due to the difference in the distortion of the magnetic field for cases with and without acceleration, which is the result of the different eddy current distributions in the specimen. The findings will help to allow the optimisation of a magnetic flux leakage system to ensure that main defect features can be measured more accurately during the machine acceleration phase of scanning. It also shows the importance of conducting measurements at constant velocity, wherever possible.

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“…Many researchers have studied the velocity effect of finite element simulation. For the yoke-type magnetizer, the eddy currents are induced in the region beneath the poles [ 46 , 47 , 48 , 49 ], and the magnetic field is perturbed [ 50 ]. A comparison between the distributions of the eddy current and magnetic field at different speeds is shown in Figure 10 .…”

Section: Factors Influencing Mfl Signalmentioning

confidence: 99%

A Review of Magnetic Flux Leakage Nondestructive Testing

Feng

et al. 2022

Materials

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Magnetic flux leakage (MFL) testing is a widely used nondestructive testing (NDT) method for the inspection of ferromagnetic materials. This review paper presents the basic principles of MFL testing and summarizes the recent advances in MFL. An analytical expression for the leakage magnetic field based on the 3D magnetic dipole model is provided. Based on the model, the effects of defect size, defect orientation, and liftoff distance have been analyzed. Other influencing factors, such as magnetization strength, testing speed, surface roughness, and stress, have also been introduced. As the most important steps of MFL, the excitation method (a permanent magnet, DC, AC, pulsed) and sensing methods (Hall element, GMR, TMR, etc.), have been introduced in detail. Finally, the algorithms for the quantification of defects and the applications of MFL have been introduced.

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3D simulation and experiment on high speed rail MFL inspection

Cited by 55 publications

References 7 publications

Effect of scanning acceleration on the leakage signal in magnetic flux leakage type of non-destructive testing

Effect of scanning acceleration on the leakage signal in magnetic flux leakage type of non-destructive testing

Effect of Scanning Acceleration on the Leakage Signal in Magnetic Flux Leakage Type of Non-destructive Testing

A Review of Magnetic Flux Leakage Nondestructive Testing

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