A Novel ACFM Probe With Flexible Sensor Array for Pipe Cracks Inspection

Zhao, Jianming; Li, Wei; Yuan, Xin’an; Zhu, Yukai; Zhen-xiang, Wang

doi:10.1109/access.2020.2971177

Cited by 15 publications

(14 citation statements)

References 26 publications

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“…Simulated signals results of both the RUEC satellite probe and conventional probe for crack detection at angles θ = 0°, 30°, 60° and 90° are shown in Figure 10. In this figure, Bx and Bz signals show accordance with experimental results reported in (Li et al , 2016; Zhao et al , 2020), which proves the capability of RUEC satellite probe for crack orientation detection. The rotating field system using the RUEC satellite probe ensures perfect and consistent detection of cracks of all orientations Figure 10(a) 0°, (b) 30°, (c) 60° and (d) 90°.…”

Section: Model-based Study For Arbitrary Angle Crack Detectionsupporting

confidence: 89%

“…The comparison of the 3D calculation results, Figure 8, with the ACFM/RACFM experimental results reported by Li et al (2016Li et al ( , 2013, Wei et al (2011Wei et al ( , 2013, Li et al (2020) and Zhao et al (2020) demonstrate that the RUEC satellite probe is properly validated. Therefore, with this calculation model, we can investigate the Bx and Bz signals in the case of detecting different crack orientations by analyzing the relationship between the detection sensitivity of arbitrary angle cracks and the magnetic induction field characteristics compared to the conventional probe.…”

Section: Magnetic Induction Signal Characteristicsmentioning

confidence: 58%

“…As a result, the probe maintains equal sensitivity to defects of arbitrary orientation. Zhao et al (2020) presented a novel ACFM probe with a flexible sensor array to identify both circumferential and axial cracks of different diameters inside and outside pipes. Insensitivity to circumferential cracks in steam generator (SG) tubes in nuclear power plants which constitutes a major drawback of the conventional bobbin is also addressed by Zhao et al (2022b) and Xin et al (2013) using a new hybrid spiral-bobbin probe (S-bobbin probe) and a novel rotating field eddy current probe with bobbin pickup coil, respectively.…”

Section: Introductionmentioning

confidence: 99%

“…Based on the configuration and principle of the U-shaped ACFM probe (Wei et al, 2011(Wei et al, , 2013Li et al, 2013Li et al, , 2016Li et al, , 2020Zhao et al, 2022aZhao et al, , 2020Feng et al, 2021) designed a double U-shaped orthogonal inductor and underwater test system for arbitrary angle crack detection on an underwater structure with a single pass scan. As the measurement is carried out, the induced electromagnetic field is disturbed by the crack in the structures.…”

Section: Introductionmentioning

confidence: 99%

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New design of rotating eddy current probe for arbitrary orientation cracks detection

Barrarat,

Rayane,

Helifa

et al. 2023

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Purpose Detecting the orientation of cracks is a major challenge in the development of eddy current nondestructive testing probes. Eddy current-based techniques are limited in their ability to detect cracks that are not perpendicular to induced current flows. This study aims to investigate the application of the rotating electromagnetic field method to detect arbitrary orientation defects in conductive nonferrous parts. This method significantly improves the detection of cracks of any orientation. Design/methodology/approach A new rotating uniform eddy current (RUEC) probe is presented. Two exciting pairs consisting of similar square-shaped coils are arranged orthogonally at the same lifting point, thus avoiding further adjustment of the excitation system to generate a rotating electromagnetic field, eliminating any need for mechanical rotation and focusing this field with high density. A circular detection coil serving as a receiver is mounted in the middle of the excitation system. Findings A simulation model of the rotating electromagnetic field system is performed to determine the rules and characteristics of the electromagnetic signal distribution in the defect area. Referring to the experimental results aimed to detect artificial cracks at arbitrary angles in underwater structures using the rotating alternating current field measurement (RACFM) system in Li et al. (2016), the model proposed in this paper is validated. Originality/value CEDRAT FLUX 3D simulation results showed that the proposed probe can detect cracks with any orientation, maintaining the same sensitivity, which demonstrates its effectiveness. Furthermore, the proposed RUEC probe, associated with the exploitation procedure, allows us to provide a full characterization of the crack, namely, its length, depth and orientation in a one-pass scan, by analyzing the magnetic induction signal.

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Section: Model-based Study For Arbitrary Angle Crack Detectionsupporting

confidence: 89%

Section: Magnetic Induction Signal Characteristicsmentioning

confidence: 58%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

New design of rotating eddy current probe for arbitrary orientation cracks detection

Barrarat,

Rayane,

Helifa

et al. 2023

View full text Add to dashboard Cite

show abstract

“…And the spatial resolution of the sensor reached 0.8 mm (Xie et al , 2015). In Zhang et al (2020) and Zhao et al (2020), the voltage of the IC is transformed into the magnetic field intensity. Then, it judges the cracks according to the change of the magnetic field intensity.…”

Section: Introductionmentioning

confidence: 99%

A quantitative crack monitoring method based on crack disturbed voltage

Fan

2022

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Purpose The flexible eddy current array sensor has the characteristics of lightweight and flexibility, which has a great application prospect in the field of fatigue crack monitoring. But the exciting layout and feature signal extraction have a great influence on the crack monitoring characteristics of the sensor. This paper aims to propose a method using crack disturbed voltage as sensitivity to characterize crack propagation. Design/methodology/approach Flexible eddy current array sensors with reverse and codirectional exciting layout are proposed, and the advantages and disadvantages of three characterization methods based on the change of trans-impedance amplitude, the change of the trans-impedance’s real and imaginary part and the crack disturbed voltage are compared and analyzed by finite element simulation. Finally, the fatigue crack monitoring experiment is carried out. Findings The crack disturbed voltage and the change of trans-impedance’s imaginary part can effectively characterize the crack propagation for sensors with different exciting layouts. The codirectional exciting layout sensor has better crack identification sensitivity than the reverse exciting layout sensor, especially the induction coil 2. When the distance between the exciting coil and the induction coil is 0.1, 0.2 and 0.3 mm, it is increased by 372.09%, 295.24% and 231.43%, respectively. Originality/value Crack disturbed voltage can effectively characterize the crack propagation for sensors with two different exciting layouts.

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Fast and efficient inversion methods for crack sizing using Bz magnetic signature

Barrarat,

Bensaid,

Rayane

et al. 2023

Int J Numerical Modelling

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Fast estimation is a critical feature of the proposed modeling approach as a “forward” fast solver that has a key role in solving the “inverse” problem involved in crack sizing, especially for real‐time applications. To this end, two different inversion methods have been proposed to estimate the crack depth. The first one uses an interpolation model of the 3D direct model simulation data. The second approach is based on artificial neural networks (ANN). In this article, the rotating uniform eddy current (RUEC) probe is used to detect the normal magnetic component Bz which is defined as the characteristic signal for reconstructing the crack length and depth concurrently. Using the first approach, The Bz characteristic 3D surface is presented, and this can be modeled by a fitted polynomial interpolation equation. Thus, the crack depth can be inverted using this equation referring to the experimental or simulated Bz signal and the crack length. The ANN is outlined to determine the crack depth based on the simulated Bz signature. The move from the first inversion method to the second was flexible and useful, in which the interpolation model is used as a defect signal generator for fast building of a large and efficient database for ANN training. Both of the proposed methods proved the objectivity and accuracy of the inversion results and offered more robust engineering support for automated NDT, reducing production time and increasing productivity.

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A Novel ACFM Probe With Flexible Sensor Array for Pipe Cracks Inspection

Cited by 15 publications

References 26 publications

New design of rotating eddy current probe for arbitrary orientation cracks detection

New design of rotating eddy current probe for arbitrary orientation cracks detection

A quantitative crack monitoring method based on crack disturbed voltage

Fast and efficient inversion methods for crack sizing using Bz magnetic signature

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