Detection of Localized Damage in Water Wall Tubes of Thermal Power Plants Using GMR Sensor Array Based Magnetic Flux Leakage Technique

Singh, W. Sharatchandra; Rao, B. P. C.; Mukhopadhyay, C. K.; Jayakumar, T.

doi:10.1007/s10921-015-0295-7

Cited by 25 publications

(5 citation statements)

References 12 publications

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“…[20,21,9] introduced Giant-magneto resistive (GMR) sensors for eddy current testing and MFL testing; [6] reported the detection of pulsed eddy current testing signals by anisotropic magneto-resistive (AMR) sensors. Recently developed Magneto-Impedance (MI) sensor outperforms GMR and AMR on its sensitivity, bipolar linearity, low hysteresis, temperature stability [22,23,24,27], and etc., and is of increasing interest to the NDT society.…”

Section: B Flux Passing Through a Thinning's Central Cross Sectionmentioning

confidence: 99%

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Nondestructive Testing of Back-Side Local Wall-Thinning by Means of Low Strength Magnetization and Highly Sensitive Magneto-Impedance Sensors

Cheng¹

2016

IEEE Sensors J.

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A non-destructive testing method is presented for inspection and evaluation of back-side local thinning in ferromagnetic structures. It is shown that the change of initial magnetic leakage reluctivity is correlated with a local thinning's reduced thickness and thinning area; a thinning's transversal length is more significant than the longitudinal length in terms of thinning area. The faint magnetic flux leakage excited from back-side local thinning can be detected by highly sensitive magneto-impedance sensors. Validation tests were carried out by moving a probe over a local thinning in the transversal and longitudinal directions, respectively. Results show the feasibility of inspecting and evaluating back-side local thinning by using small magnetization force and highly sensitive magneto-impedance sensors.Index Terms-magnetic circuits, magnetic flux leakage, magnetic sensors, magnetic field measurement, nondestructive testing, numerical simulation, thickness measurement, wall-thinning 1530-437X (c)

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Section: B Flux Passing Through a Thinning's Central Cross Sectionmentioning

confidence: 99%

“…There are many established methods [3,4,5,6,7,8,9,10,11,12,13,14] to inspect wall-thinning, among which the Magnetic Flux Leakage (MFL) testing is one of the most cost-effective electromagnetic nondestructive testing & evaluation (ENDT&E) techniques [9,10,11,12,13,14] to inspect defects in ferromagnetic steel or iron made structures.…”

Section: Introductionmentioning

confidence: 99%

Nondestructive Testing of Back-Side Local Wall-Thinning by Means of Low Strength Magnetization and Highly Sensitive Magneto-Impedance Sensors

Cheng¹

2016

IEEE Sensors J.

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“…On the one hand, methodologies and standards are required that allow for the integration and maximum utilization of the information generated by these techniques in asset integrity and maintenance management processes [18]. On the other hand, advanced point cloud processing and analysis tools and algorithms are needed that allow for the efficient and reliable extraction of the relevant parameters and indicators for evaluating the condition and behavior of tanks [19].…”

Section: Introductionmentioning

confidence: 99%

UAS Photogrammetry and TLS Technology: A Novel Approach to Predictive Maintenance in Industrial Tank Systems

García-Martos,

García-Trenza,

Saura-Campos

et al. 2024

Drones

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This paper explores the integration of terrestrial laser scanning (TLS) and unmanned aerial system (UAS) photogrammetry for the diagnosis and evaluation of deformations in industrial tanks, demonstrating their significant contribution to preventive maintenance. TLS accurately measures distances to the tank’s surface, generating detailed 3D point clouds, while UAS photogrammetry captures high-resolution images from various angles and altitudes. By combining TLS and UAS data into comprehensive 3D models, engineers can identify subtle deformations and anticipate structural failures. The study results revealed significant deviations in tank shell verticality and roundness using TLS and notable roof unevenness using UAS. Comparing 3D models before and after corrective measures showed improved structural integrity. This approach enhances safety, optimizes resources, and enables targeted interventions. The findings highlight the potential of TLS and UAS technologies to revolutionize preventive maintenance, offering an efficient, precise, and less intrusive methodology for critical infrastructure inspection. Adopting these technologies can improve safety, reduce operational risks, and optimize asset management in various industrial sectors.

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“…Once a leak occurs, it will cause environmental pollution, economic loss and pose threats to personal safety. In order to ensure the safe operation of industrial equipment, it is necessary to carry out in-service non-destructive testing and evaluation of the tube [4][5][6][7]. What's more, the eddy current testing method has advantages of little pollution, high efficiency, low cost, and convenience for on-site detection, which is an effective method for inservice testing of tubes with coating layers [8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Modeling and investigation of crack evaluation in metal tube based on magnetic field analysis method

Jiang,

Liu

2023

Phys. Scr.

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In this paper, an analytical model of eddy current testing of a metal tube has been proposed to evaluate circumferential cracks from the signals of the magnetic field. First, based on Maxwell’s equations in time-harmonic form, magnetic vector potential equations for each region of space are built under two different configurations of the bobbin probe and the encircling probe respectively. Next, the magnetic vector potentials are solved by imposing conditions at the interface. Then, series expressions of the radical and axial magnetic induction intensities have been obtained. In addition, based on the proposed modeling, the influences of cracks at different locations on the surface magnetic field have been analyzed. The results have shown that the radial magnetic induction intensity increases while the axial magnetic induction intensity decreases for the internal and external cracks with the same shape and size on the surface of the metal tube. Moreover, the magnetic induction intensity has shown much more sensitive property to external cracks than it has done to internal cracks for the encircling probe. However, for the bobbin probe, the magnetic induction intensity has demonstrated almost the same sensitivity in detection for both internal and external cracks in the metal tube. The researching results have important theoretical and practical significance for understanding the physical process of eddy current testing, optimizing parameters of the experimental system and building the inversion model.

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Detection of Localized Damage in Water Wall Tubes of Thermal Power Plants Using GMR Sensor Array Based Magnetic Flux Leakage Technique

Cited by 25 publications

References 12 publications

Nondestructive Testing of Back-Side Local Wall-Thinning by Means of Low Strength Magnetization and Highly Sensitive Magneto-Impedance Sensors

Nondestructive Testing of Back-Side Local Wall-Thinning by Means of Low Strength Magnetization and Highly Sensitive Magneto-Impedance Sensors

UAS Photogrammetry and TLS Technology: A Novel Approach to Predictive Maintenance in Industrial Tank Systems

Modeling and investigation of crack evaluation in metal tube based on magnetic field analysis method

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