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Magnetic Flux Leakage Testing for Defect Characterization
2016As a further study on the low-level magnetized magnetic flux leakage testing, numerical simulations and measurements were conducted to investigate the influence of liftoff variation, applicability of the approach to local thinning and material characterization.
Cheng Weiying +2 more
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Understanding Magnetic Flux Leakage Signals From Dents
Volume 2: Integrity Management; Poster Session; Student Paper Competition, 2006The Magnetic Flux Leakage (MFL) technique is sensitive both to pipe wall geometry and pipe wall stresses, therefore MFL inspection tools have the potential to locate and characterize mechanical damage in pipelines. However, the combined influence of stress and geometry make MFL signal interpretation difficult for a number of reasons: 1) the MFL signal ...
Lynann Clapham +2 more
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Magnetic charge model of defect in magnetic flux leakage testing
International Journal of Applied Electromagnetics and Mechanics, 2020The defect in structures is the major risk to the structural integrity, thus to perform the defect detections and evaluations efficiently is critical in assuring the structural safety. Magnetic flux leakage testing (MFLT) is an important non-destructive testing (NDT) method.
Huang, Ranran +4 more
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Horn speaker with reduced magnetic flux leakage
The Journal of the Acoustical Society of America, 1986By adding a secondary magnetic piece with a partially open magnetic circuit to the front surface of a yoke connected to a primary magnetic piece, the magnetic flux leakage from the main magnetic piece is reduced on one hand and the magnetic flux extending across a magnetic gap is intensified through formation of a favorable magnetic field.
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A Novel Compensation Method of Probe Gesture for Magnetic Flux Leakage Testing
IEEE Sensors Journal, 2021For in-line inspection of ferromagnetic materials, magnetic flux leakage (MFL) detection is one of the most common nondestructive testing methods.
Yue Long +4 more
semanticscholar +1 more source
Flux Intensifying PM-Motor with Variable Leakage Magnetic Flux Technique
2018 International Power Electronics Conference (IPEC-Niigata 2018 -ECCE Asia), 2018This paper describes a flux intensifying PM-motor with variable magnetic flux. The unique feature of this proposed motor is the ability to passively adjust the magnetic flux linkage into the armature windings in proportion to the armature magnetomotive force and/or armature current phase.
Masahiro Aoyama, Toshihiko Noguchi
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Optimisation of the flux distribution in magnetic flux leakage testing
Insight - Non-Destructive Testing and Condition Monitoring, 2009In the magnetic flux leakage (MFL) non-destructive testing technique there are many factors that cause degeneration of the measured signal. One of these factors is non-uniformity of the magnetic flux inside the sample under test. Uniformity of the magnetic flux results in smoother and more predictable signals from various flaw types and also a ...
E Norouzi, H Ravanbod
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Analysis of Magnetic-Flux Leakage (MFL) Data for Pipeline Corrosion Assessment
IEEE transactions on magnetics, 2020Oil and gas pipelines transport and distribute large quantities of oil products and natural gas to industrial and residential customers over a long distance. However, pipeline failures could lead to enormous hazards and safety issues.
Xiang Peng +3 more
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3D magnetic field sensing for magnetic flux leakage defect characterisation
Insight - Non-Destructive Testing and Condition Monitoring, 2006Magnetic Flux Leakage (MFL) testing is widely used to detect defects in pipelines, rail track and other structures. The measurement of the two field components perpendicular to the test surface and parallel to the applied field in MFL systems is well established.
Wilson JW, Tian GY
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IEEE transactions on energy conversion
The end leakage flux generated by the current in the end winding of the turbogenerator is large, which has a significant effect on the electromagnetic losses and temperature in the end region.
Jichao Han +5 more
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The end leakage flux generated by the current in the end winding of the turbogenerator is large, which has a significant effect on the electromagnetic losses and temperature in the end region.
Jichao Han +5 more
semanticscholar +1 more source