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Theory and Application of Magnetic Flux Leakage Pipeline Detection [PDF]

open access: yesSensors, 2015
Magnetic flux leakage (MFL) detection is one of the most popular methods of pipeline inspection. It is a nondestructive testing technique which uses magnetic sensitive sensors to detect the magnetic leakage field of defects on both the internal and ...
Yan Shi   +4 more
doaj   +7 more sources

A Review of Magnetic Flux Leakage Nondestructive Testing. [PDF]

open access: yesMaterials (Basel), 2022
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
Feng B, Wu J, Tu H, Tang J, Kang Y.
europepmc   +3 more sources

A Magnetic Flux Leakage Detector for Ferromagnetic Pipeline Welds with a Magnetization Direction Perpendicular to the Direction of Travel [PDF]

open access: yesSensors
For the sake of realizing the safety detection of natural gas and petroleum pipeline welds, this paper designs a ferromagnetic pipeline weld magnetic flux leakage detector based on the calculation of the magnetic circuit of the detection probe, with the ...
Wei Cui   +4 more
doaj   +2 more sources

Serial MTJ-Based TMR Sensors in Bridge Configuration for Detection of Fractured Steel Bar in Magnetic Flux Leakage Testing [PDF]

open access: yesSensors, 2021
Thanks to high sensitivity, excellent scalability, and low power consumption, magnetic tunnel junction (MTJ)-based tunnel magnetoresistance (TMR) sensors have been widely implemented in various industrial fields.
Zhenhu Jin   +3 more
doaj   +2 more sources

Electromechanical Characteristics Analysis of Magnetic Shield on Superconducting Magnetic Levitation Train [PDF]

open access: yesMicromachines
The guest room and aisle of electric high-speed maglev train must be shielded from leakage magnetic flux produced by superconducting strong magnetic field.
Mingyuan Hu   +3 more
doaj   +2 more sources

Quantitative method of pipeline magnetic leakage internal signal detection on the basis of an improved neural network [PDF]

open access: yesScientific Reports
In response to the problem of poor quantification ability and unclear feature correlation of pipeline defect magnetic flux leakage signals, a neural network is proposed to establish the relationship between the characteristic quantities of pipeline ...
Guoqing Wang   +3 more
doaj   +2 more sources

A Magnetic Flux Leakage and Magnetostrictive Guided Wave Hybrid Transducer for Detecting Bridge Cables

open access: yesSensors, 2012
Condition assessment of cables has gained considerable attention for the bridge safety. A magnetic flux leakage and magnetostrictive guided wave hybrid transducer is provided to inspect bridge cables.
Jiang Xu   +3 more
doaj   +3 more sources

Analytical modeling of coreless stator axial flux permanent magnet machines under no-load condition [PDF]

open access: yesScientific Reports
This paper presents three analytical techniques for 3D modeling and analysis of coreless stator axial flux permanent-magnet (CS-AFPM) machines under no-load condition. Quasi 3D analytical model based on Hague’s solution, magnetic equivalent circuit (MEC)
Farhad Rezaee-Alam
doaj   +2 more sources

Research on distribution of winding leakage magnetic field of three-phase dry type transformer under short-circuit condition

open access: yesEnergy Reports, 2023
Leakage flux magnitude and pattern greatly affect transformer short-circuit resistance. In this paper, finite element calculations and experimental measurements is used to calculate the leakage magnetic field of a transformer.
Tiannan Meng   +5 more
doaj   +1 more source

Detection of uniaxial fatigue stress under magnetic flux leakage signals using Morlet wavelet

open access: yesFracture and Structural Integrity, 2022
This paper demonstrates the application of continuous wavelet transform technique for magnetic flux leakage signal generated during a uniaxial fatigue test.
S.M. Firdaus   +4 more
doaj   +1 more source

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