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Nonlinear model of flaw detection in steel pipes by magnetic flux leakage
NDT and E International, 1995Abstract A numerical model of crack detection by magnetic flux leakage that takes into account the saturation of the induction flux density with the applied field is developed. The model contains no free parameters and is validated with detailed measurements of materials properties and magnetic fields reported by Forster.
Eduardo Altschuler, Alberto Pignotti
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The influence of magnetic head’s pose on magnetic flux leakage detection
International Journal of Applied Electromagnetics and Mechanics, 2020As a high-sensitivity magnetic sensor, the magnetic head has been gradually applied to non-destructive testing. Compared with the single coil and the coil with an iron core, the magnetic core can converge the weak leakage magnetic field because it can form a magnetic circuit to transmit the leakage field to the coil wound thereon.
Tang, Jian +3 more
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Detectability of Rail Defects by Magnetic Flux Leakage Method
Russian Journal of Nondestructive Testing, 2019The ability of the Magnetic Flux Leakage (MFL) method to detect flaws in railway rails in two different ways has been studied. First, a three-dimensional computer simulation of the leakage of magnetic flux around a transverse crack in the rail head was carried out to determine the relationship between the main characteristics (size and depth) of the ...
A. G. Antipov, A. A. Markov
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In-pipe Detection System Based on Magnetic Flux Leakage and Eddy Current Detection
2020 International Conference on Sensing, Measurement & Data Analytics in the era of Artificial Intelligence (ICSMD), 2020Pipeline plays an important role in the transportation of oil and gas. In-pipe detection technology is currently widely used at home and abroad. It is of great significance to develop in-pipe detection equipment with independent intellectual property rights and suitable for the actual situation of oil and gas pipelines in China.
Xiaolin Liu +5 more
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Magnetic Flux Leakage techniques for detecting corrosion of pipes
2022Oil and gas pipelines are subjected to corrosion due to harsh environmental conditions as in refinery and thermal power plants. Interesting problems such as internal and external corrosion, emerging from the increasing demand for pipeline protection have prompted this study.
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Review of Scientific Instruments, 2019
We proposed a lightweight magnetizer toward the realization of a portable circumferential magnetic flux leakage (MFL) inspection tool for the detection of longitudinal defects with a linear motion between pipes and the inspection tool. The proposed magnetizer consists of four permanent magnetic poles constructing a configuration in which the like poles
Hong Quang Pham +4 more
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We proposed a lightweight magnetizer toward the realization of a portable circumferential magnetic flux leakage (MFL) inspection tool for the detection of longitudinal defects with a linear motion between pipes and the inspection tool. The proposed magnetizer consists of four permanent magnetic poles constructing a configuration in which the like poles
Hong Quang Pham +4 more
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A New Dual Magnetic Sensor Probe for Lift-off Compensation in Magnetic Flux Leakage Detection
2020 IEEE International Instrumentation and Measurement Technology Conference (I2MTC), 2020For in-line inspection of ferromagnetic materials, magnetic flux leakage (MFL) detection is the most common nondestructive testing method. The measured signals of the MFL detection are affected by many factors, especially the lift-off of sensors. In addition, in practical inspection applications, due to mechanical vibration, the lift-off of sensors ...
Yue Long 0003 +4 more
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IEEE Transactions on Instrumentation and Measurement, 2021
Defect opening profile recognition is a common problem in magnetic flux leakage (MFL) detection, while the traditional defect edge detection methods are not accurate enough. Starting from the basic principle of the electromagnetic field, this article discusses the model of the corresponding relationship between defect MFL signal and defect opening ...
Yue Long 0003 +4 more
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Defect opening profile recognition is a common problem in magnetic flux leakage (MFL) detection, while the traditional defect edge detection methods are not accurate enough. Starting from the basic principle of the electromagnetic field, this article discusses the model of the corresponding relationship between defect MFL signal and defect opening ...
Yue Long 0003 +4 more
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The research of defect detection test system based on magnetic flux leakage
Proceedings of 2011 6th International Forum on Strategic Technology, 2011According to the defect characteristics and the failure mechanisms, the defect detection technique of rail is discussed based on the magnetic flux leakage (MFL), and a test system of magnetic flux leakage based on AT89C51 is proposed. This paper firstly introduces the theory of magnetic flux leakage, and then combining with electron and circuit theory ...
null Junshan Gao +2 more
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Magnetic Flux Leakage Detection Technology for Well Casing on Neural Network
2008 International Symposium on Intelligent Information Technology Application Workshops, 2008Well casing integrity is vital for the safe operations of oil wells, and also significant to detect well casing defects. Magnetic flux leakage (MFL) detection technology is widely-used in detecting the defects of various pipelines. Owing to the very complicated environment where well casing is laid in, the system which based on magnetic flux leakage ...
Jinzhong Chen, Lin Li, Jinan Shi
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