An Online MFL Sensing Method for Steel Pipe Based on the Magnetic Guiding Effect

Wu, Jianbo; Fang, Hui; Huang, Xiaoming; Xia, Hui; Kang, Yihua; Tang, Chaoqing

doi:10.3390/s17122911

Cited by 18 publications

(18 citation statements)

References 40 publications

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“…The supersonic pulses propagate sheer to the pipe wall surface. From the time-of-flight of the back-wall echo and also the well-known supersonic rate in pipe steel, the remaining wall thick-capes are often obtained [8].…”

Section: Fig1: Defining Static Magnetic Flux Densitymentioning

confidence: 99%

A New System for Steam Boiler Tubes Using Artificial Neural Network

Pandian¹,

Kalam²

2019

IJEAT

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A major inspection challenge facing the boiler industries is to satisfy the welds in tubing and plate during the manufacturing, erection and commissioning stages. During commercial operation the plant boiler tubes that leaks due to downtime. As the main part of the boiler, the water wall tube which runs on dangerous environment may lead to serious boiler accidents, causing of the tubes failure. For this reason, inspecting the defects on the steam boiler tube comprehensively is extremely required. However, single traditional NDT inspection method is limited .In terms of the ability of identifying different kinds of defects. In order to meet the requirement of fullscale inspection, in this paper, a new system foe steam boiler tubes are experimented. After experiment, the new system can effectively measure the remaining wall thickness and identify different kinds of defects including pinholes and circumferential cracks with the sensor being moved outside the tubes using artificial neural networks.

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Section: Fig1: Defining Static Magnetic Flux Densitymentioning

confidence: 99%

A New System for Steam Boiler Tubes Using Artificial Neural Network

Pandian¹,

Kalam²

2019

IJEAT

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“…By “quality”, we mean a high discrimination rate between possible material states, which, in consequence, allows highly effective correct identification of the actual condition and a high level of product safety. In practice, this involves the need to develop integrated inspection instrumentation coupling multisource systems and advanced methods of processing and data fusion [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 ].…”

Section: Introductionmentioning

confidence: 99%

“…It finds its application in the inspection of any object with ferromagnetic properties. It is frequently utilized for the inspection of pipelines or tubes [ 1 , 4 , 5 , 6 , 7 , 8 , 15 , 16 ], train wheels and axles or rail tracks [ 9 , 17 , 18 , 19 ], steel wire ropes [ 10 , 11 , 20 ], storage tanks [ 15 , 21 ], or steel construction elements [ 2 , 12 , 22 , 23 , 24 ]. The method is suitable for detecting various types of surface, subsurface, and surface-breaking deeper defects in magnetic materials such as metal loss [ 2 , 10 , 11 , 20 ], fatigue damage cracks [ 1 , 2 , 3 , 5 , 8 , 9 , 16 ], pitting corrosion [ 1 , 2 , 5 , 6 ], or plastic deformation [ 1 , 15 , 24 , 25 ].…”

Section: Introductionmentioning

confidence: 99%

“…The method is suitable for detecting various types of surface, subsurface, and surface-breaking deeper defects in magnetic materials such as metal loss [ 2 , 10 , 11 , 20 ], fatigue damage cracks [ 1 , 2 , 3 , 5 , 8 , 9 , 16 ], pitting corrosion [ 1 , 2 , 5 , 6 ], or plastic deformation [ 1 , 15 , 24 , 25 ]. The relatively small dimensions of the detectors of leaking magnetic flux allow us to apply the method to examine both the external sides [ 1 , 2 , 3 , 4 , 5 , 9 , 10 , 11 ] of the tested objects and the internal sides such as the inner wall of a pipe or hollow axle [ 1 , 6 , 8 , 16 , 19 ]. One of the main advantages of the method is the lack of need for direct contact between the inspected element and the sensing device.…”

Section: Introductionmentioning

confidence: 99%

“…One of the main challenges in the construction of measuring systems is the magnetization section. They can be built with a magnetizing coil generating an alternating (AC) or direct (DC) field or, alternatively, with a permanent magnet [ 1 , 4 ]. The AC source, due to the skin effect, is mostly used for surface condition monitoring.…”

Section: Introductionmentioning

confidence: 99%

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Utilization of Multisensor Data Fusion for Magnetic Nondestructive Evaluation of Defects in Steel Elements under Various Operation Strategies

Psuj

2018

Sensors

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Increasing the number of inspection sources creates an opportunity to combine information in order to properly set the operation of the entire system, not only in terms of such factors as reliability, confidence, or accuracy, but inspection time as well. In this paper, a magnetic sensor-array-based nondestructive system was applied to inspect defects inside circular-shaped steel elements. The experiments were carried out for various sensor network strategies, followed by the fusion of multisensor data for each case. In order to combine the measurements, first data registration and then four algorithms based on spatial and transformed representations of sensor signals were applied. In the case of spatial representation, the data were combined using an algorithm operating directly on input signals, allowing pooling of information. To build the transformed representation, a multiresolution analysis based on the Laplacian pyramid was used. Finally, the quality of the obtained results was assessed. The details of algorithms are given and the results are presented and discussed. It is shown that the application of data fusion rules for magnetic multisensor inspection systems can result in the growth of reliability of proper identification and classification of defects in steel elements depending on the utilized configuration of the sensor network.

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Visual Reconstruction of Irregular Crack in Austenitic Stainless Steel Based on ACFM Technique

Yuan,

Li,

Zhao

et al. 2024

Recent Development of Alternating Current Field Measurement Combine With New Technology

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For the advantages of corrosion resistance, high toughness and plasticity, the austenitic stainless steel is widely used in the petrochemical special equipment and offshore structure. The austenitic stainless steel usually services in high temperature, high pressure and corrosive medium environment. Various types of irregular cracks are easily introduced in the surface of the austenitic stainless steel, which threats the safety of the structure. Due to the property of non-magnetic, weak conductivity and coarse grain, it is still a challenge to detect and evaluate irregular cracks in the austenitic stainless steel using the nondestructive testing (NDT) method. The visual reconstruction method is presented to detect and evaluate the irregular crack in the austenitic stainless steel based on the alternating current field measurement (ACFM) technique. The austenitic stainless steel irregular crack ACFM finite element simulation model is set up. The distorted electromagnetic field around the irregular crack is analyzed. The vertical direction magnetic field (Magnetic field perpendicular to specimen, called Bz) image gradient field visual reconstruction method is presented to reconstruct the surface profile of the irregular crack. The irregular crack testing experiments are carried out to verify the efficiency of the visual reconstruction method. The results show that the current field induced by the ACFM probe gathers at the tips of the irregular crack in the austenitic stainless steel. The gathered current makes the vertical direction magnetic field Bz distorted. The Bz image gradient field can reflect the location of the gathered current. The surface profile of the irregular crack can be imaged visually and evaluated accurately by the Bz image gradient field visual reconstruction method.

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An Online MFL Sensing Method for Steel Pipe Based on the Magnetic Guiding Effect

Cited by 18 publications

References 40 publications

A New System for Steam Boiler Tubes Using Artificial Neural Network

A New System for Steam Boiler Tubes Using Artificial Neural Network

Utilization of Multisensor Data Fusion for Magnetic Nondestructive Evaluation of Defects in Steel Elements under Various Operation Strategies

Visual Reconstruction of Irregular Crack in Austenitic Stainless Steel Based on ACFM Technique

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