Results 211 to 220 of about 3,752 (260)

A Practical Signal Progressing Method for Magnetic Flux Leakage Testing

Applied Mechanics and Materials, 2014
The magnetic flux leakage (MFL) testing, as a modern nondestructive testing technology, requires fast and accurate signal progressing methods. A practical signal progressing method for MFL testing was presented, especially for tank floor MFL testing. According to the FFT result of the original signal, a difference amplifier and a low-pass filter were ...
Zhang Wei Ling, Wei Yong Cai, Si Hai Li, Chao Li   +3 more
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Steel pipeline testing using magnetic flux leakage method

2008 IEEE International Conference on Industrial Technology, 2008
With the widespread application and fast development of gas and oil pipeline network in China, the pipeline inspection technology has been used more extensively. The magnetic flux leakage (MFL) method has established itself as the most widely used in-line inspection technique for the evaluation of gas and oil pipelines.
Xiang Li, Xunbo Li, Liang Chen, Guangxu Qin, Peifu Feng, Zuoying Huang   +5 more
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Magnetic Flux Leakage Testing of Wire Rope Defects with Denoising

2019 IEEE 3rd Information Technology, Networking, Electronic and Automation Control Conference (ITNEC), 2019
As an efficient non-destructive testing method, magnetic flux leakage (MFL) testing has been widely used for inspecting wire ropes. In this method, many factors can affect the MFL signal, and the accurate extraction of defect signals is a fundamental issue that bears consideration.
Enchao Zhang, Donglai Zhang, Shimin Pan
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Study on local magnetization of magnetic flux leakage testing for storage tank floors

Insight - Non-Destructive Testing and Condition Monitoring, 2003
Local magnetization is the basis of magnetic flux leakage testing for tank floors. A 3D finite element method has been used to study the influence of the width of steel plate on local magnetization of the plate. Results show that the local region can be magnetized to saturation even if the width of steel plate is infinite.
Z Liu, Y Kang, X Wu, S Yang
openaire   +1 more source

Study on the effects of yoke parameters on uniform magnetization for magnetic flux leakage testing

2015 IEEE Magnetics Conference (INTERMAG), 2015
For the magnetic flux leakage (MFL) testing technique, the uniform magnetization to the measured specimen will result in smooth signals and reduce the dynamic influence caused by the relative motion between the magnetizing yoke and specimen. In this paper, a magnetic circuit model is established to analyze the effects of yoke parameters on the uniform ...
Y. Wang, X. Wu, K. Zhao
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The Application of Magnetic Shielding Effect in Drill Pipe Magnetic Leakage Flux Testing

2013 Fifth International Conference on Measuring Technology and Mechatronics Automation, 2013
Electromagnetic finite element analysis shows that pipe magnetic flux leakage signals are centralized near defects obviously when the magnetic shielding exists. At this time, the background magnetic flux between permanent magnet components coupling through the air medium will be reduced greatly.
null Ma Yilai, null Lin Li, null Jiang Kaiwen, null Zhao Xulin   +3 more
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3D Reconstructing of Arbitrary Defects with Magnetic Flux Leakage Testing Signals

2020 IEEE Far East NDT New Technology & Application Forum (FENDT), 2020
By detecting and processing the Magnetic Flux Leakage (MFL) signals to identify and estimate the defects in ferromagnetic materials or structures, for example, in the steel pipelines, the so called Magnetic Flux Leakage Testing (MFLT) technology has been widely used in industry. However, the existing MFLT technology is suitable for locating the defects
Hong-Mei Li, Ran-Ran Huang, Chun-Tian Zhao, Jia Yan, Yu Wang   +4 more
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Magnetic Flux Leakage Measurement System for Nondestructive Testing of Water-Cooled Wall

2019 IEEE International Instrumentation and Measurement Technology Conference (I2MTC), 2019
A system that can calculate the abrasive corrosion and wall thinning of water-cooled wall tubes of boiler by measuring magnetic flux change was developed. A magnetizer, which is curved according to the cross-sectional shape of the tube, membrane and weld line, magnetizes a part of the water-cooled wall in the axial direction.
Hoyong Lee, Choe Eunho, Jinyi Lee, Gyejo Jung   +3 more
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Analysis of the Eccentric Problem of Wire Rope Magnetic Flux Leakage Testing

2019 IEEE 3rd Information Technology, Networking, Electronic and Automation Control Conference (ITNEC), 2019
Magnetic flux leakage (MFL) technology is widely used for the inline inspection of wire rope made of ferromagnetic steel. In order to protect magnetic sensors and ensure the wire rope through the exciting device smoothly, the diameter aperture of exciting device was larger than the diameter of the wire rope.
Shimin Pan, Donglai Zhang, Enchao Zhang
openaire   +1 more source

3D Finite Element Analysis for Magnetic Flux Leakage Testing

Advanced Materials Research, 2011
Magnetic flux leakage (MFL) is a non-destructive testing method used to inspect ferrous materials. However, apparatus parameters could affect the MFL inspection tool’s ability to characterize anomalies. In this paper, MFL signals obtained during the inspection of pipes have been simulated using three-dimensional finite element analysis and the effects ...
openaire   +1 more source