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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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A study of magnetic flux-leakage signals
Journal of Physics D: Applied Physics, 1998Magnetic flux-leakage (MFL) measurement is the most widely used non-destructive technique for in-service inspection of oil and gas pipelines. The effect of line-pressure-induced hoop stress on MFL signals has been studied for an electrochemically milled pit (50% penetration) in a 9 mm thick steel pipe wall.
K Mandal, D L Atherton
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Dipole Modeling of Magnetic Flux Leakage
IEEE Transactions on Magnetics, 2009In this paper, we present an analytical model to represent the 3-D magnetic flux leakage (MFL) field due to the occurrence of a surface-breaking defect in a ferromagnetic specimen. This situation is frequently encountered in the nondestructive evaluation (NDE) of energy pipelines using the MFL technique.
S.M. Dutta, F.H. Ghorbel, R.K. Stanley
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MAGNETIC FLUX LEAKAGE: A BENCHMARK PROBLEM
AIP Conference Proceedings, 2011The magnetic flux leaked by artificial notches machined by EDM is measured for two different rectangular steel plates. The measurements were performed for different field intensities, different liftoffs, and both sides, simultaneously recording the three components of the magnetic field.
J. I. Etcheverry +4 more
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2016
As early as 1868, the British Naval Architects Association began to use magnetic flux leakage technology and found defects on the steel pipe through the compass. In 1918, it was found that powder was absorbed near defects due to the changes of surface magnetic field; thus, magnetic particle detection method was invented.
Songling Huang, Shen Wang
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As early as 1868, the British Naval Architects Association began to use magnetic flux leakage technology and found defects on the steel pipe through the compass. In 1918, it was found that powder was absorbed near defects due to the changes of surface magnetic field; thus, magnetic particle detection method was invented.
Songling Huang, Shen Wang
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Modeling of Flux Leakage in a Magnetic Circuit with Permanent Magnet
Transactions of the Korean Society for Noise and Vibration Engineering, 2011The magnetic circuit analysis excluding flux loss and fringing effect often gives a result with unignorable error, when compared with real system. But, it is not easy to make a complete magnetic circuit model with the loss effects. This paper introduces a relatively simple method to build the model including the flux loss and fringing effect, in which ...
Seung-Jong Kim +3 more
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Leakage flux modelling in magnetic fluids test bench
2016 IEEE International Conference on Advanced Intelligent Mechatronics (AIM), 2016The proposed paper discusses a new methodology to monitor the B-H curve of magnetic fluids, which have low relative permeability. The set-up consists of a magnetic circuit which encloses a sample. A first coil allows creating a magnetic field into the sample whereas a second one measures the flux density.
Cecile Cuchet +4 more
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Evaluation of Leakage Flux out of a Dental Magnetic Attachment
2007 29th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 2007A dental magnetic attachment is a device to retain dental prostheses such as overdentures by magnetic attraction. As compared with mechanical attachments, the magnetic attachment has a superior retention properties due to less lateral pressure to its abutment tooth, and hence it has come to be widely used, particularly for retaining overdentures ...
M, Nishida, Y, Tegawa, Y, Kinouchi
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Investigation of the flux leakage effects in transverse-flux magnetic gear
2017 20th International Conference on Electrical Machines and Systems (ICEMS), 2017The purpose of this paper is to investigate the flux leakage effects in the transverse-flux magnetic gear (MG), in which two typical flux leakage phenomena are identified and analyzed, namely, end leakage and fringing leakage. By using the JMAG 12.1 software, the three-dimensional finite element analysis (3D-FEA) modeling surrounded by some blocks with
Xianglin Li +3 more
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Numerical Simulation of a Leakage Magnetic Flux for Permanent Magnet DC Motors
2011 Second International Conference on Digital Manufacturing & Automation, 2011On the basis of the analysis of the flux leakage mechanism of permanent magnet DC motors, boundary conditions for numerical simulation of a leakage magnetic flux are estabLished. By using the finite element analysis software Magnet, the motor leakage magnetic flux is simulated under different boundary conditions.
Wei Li, Baowei Song, Yuli Hu
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