scholarly journals Construct Coil Probe Using GMR Sensor for Eddy Current Testing

2018 ◽  
Vol 225 ◽  
pp. 02021 ◽  
Author(s):  
Moneer A Faraj ◽  
Ahmed N Abdalla ◽  
Fahmi Bin Samsuri ◽  
Damhuji Rifai ◽  
Kharudin Ali
Keyword(s):  
Magnetic Field ◽  
Eddy Current ◽  
Ferromagnetic Material ◽  
Eddy Current Testing ◽  
Current Testing ◽  
Calibration Block ◽  
Gmr Sensor ◽  
Non Destructive ◽  
Magneto Resistance ◽  
Detection Medium

Eddy current testing is a widely applied non-destructive technique in different sections of industries. Nowadays eddy current testing is an accurate, widely used and well-understood inspection technique, particularly in the aircraft and nuclear industries. The main purpose of this paper is to construct an eddy current probe by using transmission coil and using a Giant Magneto resistance (GMR) sensor for detection medium. This probe only use a magnetic field to operational in detection of flaws. A transmission coil is an object made from a material that is magnetized and creates its own persistent magnetic field. A GMR-coil probe has been used to inspect two different material of calibration block. Experimental results obtained by scanning A GMR-coil probe over Brass calibration block has 10 slots with different depth from 0.5mm to 5mm and mild steel has 8 slots with different depth from 0.5mm to 4mm are presented. The result prove that GMR-coil probe that operated using a magnetic field and sensor more effective on ferromagnetic material.

Eddy Current Testing Probe Based on Double-Coil Excitation and GMR Sensor

2019 ◽  
Vol 68 (5) ◽  
pp. 1533-1542 ◽  
Author(s):  
Andrea Bernieri ◽  
Luigi Ferrigno ◽  
Marco Laracca ◽  
Antonio Rasile
Keyword(s):  
Eddy Current ◽  
Eddy Current Testing ◽  
Current Testing ◽  
Gmr Sensor

scholarly journals Giant Magnetoresistance Sensors: A Review on Structures and Non-Destructive Eddy Current Testing Applications

Sensors ◽  
2016 ◽  
Vol 16 (3) ◽  
pp. 298 ◽  
Author(s):  
Damhuji Rifai ◽  
Ahmed Abdalla ◽  
Kharudin Ali ◽  
Ramdan Razali
Keyword(s):  
Eddy Current ◽  
Giant Magnetoresistance ◽  
Eddy Current Testing ◽  
Current Testing ◽  
Non Destructive

scholarly journals Numerical Simulation of Non-Destructive Remote Field Eddy Current Testing of Rolled Metal Tubes

2019 ◽  
pp. 46-55
Author(s):  
A.G. Efimov ◽  
N.R. Kuzelev ◽  
E.V. Martyanov ◽  
B.M. Kanter ◽  
A.E. Shubochkin
Keyword(s):  
Numerical Simulation ◽  
Eddy Current ◽  
Current Method ◽  
Eddy Current Testing ◽  
Eddy Current Method ◽  
Current Testing ◽  
Advantages And Disadvantages ◽  
Current Transducer ◽  
Non Destructive ◽  
Eddy Current Transducer

The first publications describing the physical principles of the non-destructive remote field eddy current testing method appeared about 30 years ago. This method allows to significantly expand the field of application of eddy current testing. However, due to the lack of a theoretical justification, this method did not get widespread use around the world. Domestic publications in this area are completely absent, and the descriptions given in few foreign publications often contradict each other. There are no results of full-scale simulation using numerical methods in available domestic and foreign sources. The distinctive feature of this method under consideration is the ability of detecting defects on the external (with respect to the eddy current transducer) side of the tested object, which is impossible for the classical eddy current method due to the limited eddy current penetration depth. The basics of the method were considered, the distinctive features were presented, and the advantages and disadvantages of remote field eddy current testing of metals were pointed out. A numerical simulation with the subsequent analysis of the obtained results has been carried out, the transducer design for remote field eddy current testing is given. The influence of various factors on the change in the added voltage of the signal coil of the eddy current transducer in the presence of a defect in the external wall of the tube was considered. Expressions that determine the optimal ratio of the diameters of the transducer and the tested product were obtained. The values of the test parameters and the limiting wall thickness of the tested ferromagnetic product were determined.

Advanced procedure for non-destructive diagnosis of real cracks from eddy current testing signals

2014 ELEKTRO ◽  
2014 ◽  
Author(s):  
Ladislav Janousek ◽  
Milan Smetana ◽  
Tatiana Strapacova ◽  
Mihai Rebican ◽  
Anton Duca
Keyword(s):  
Eddy Current ◽  
Eddy Current Testing ◽  
Current Testing ◽  
Non Destructive

Quantitative Research on Cracks in Pipe Based on Magnetic Field Response Method of Eddy Current Testing

2021 ◽  
Vol 36 (1) ◽  
pp. 99-107
Author(s):  
Feng Jiang ◽  
Shulin Liu ◽  
Li Tao
Keyword(s):  
Magnetic Field ◽  
Eddy Current ◽  
Quantitative Research ◽  
Three Dimensional ◽  
Impedance Analysis ◽  
Eddy Current Testing ◽  
Element Analysis ◽  
Defect Parameter ◽  
Current Testing ◽  
The Magnetic Field

The quantitative evaluation of defects in eddy current testing is of great significance. Impedance analysis, as a traditional method, is adopted to determine defects in the conductor, however, it is not able to depict the shape, size and location of defects quantitatively. In order to obtain more obvious characteristic quantities and improve the ability of eddy current testing to detect defects, the study of cracks in metal pipes is carried out by utilizing the analysis method of three-dimensional magnetic field in present paper. The magnetic field components in the space near the crack are calculated numerically by using finite element analysis. The simulation results confirm that the monitoring of the crack change can be achieved by measuring the magnetic field at the arrangement positions. Besides, the quantitative relationships between the shape, length of the crack and the magnetic field components around the metal pipe are obtained. The results show that the axial and radial magnetic induction intensities are affected more significantly by the cross-section area of the crack. Bz demonstrates obvious advantages in analyzing quantitatively crack circumference length. Therefore, the response signal in the three-dimensional direction of the magnetic field gets to intuitively reflect the change of the defect parameter, which proves the effectiveness and practicability of this method.

scholarly journals Numerical simulation of non-destructive remote field eddy current testing of rolled metal tubes

2019 ◽  
Vol 1327 ◽  
pp. 012012
Author(s):  
A G Efimov ◽  
B M Kanter ◽  
N R Kuzelev ◽  
E V Martyanov ◽  
A E Shubochkin
Keyword(s):  
Numerical Simulation ◽  
Eddy Current ◽  
Eddy Current Testing ◽  
Rolled Metal ◽  
Current Testing ◽  
Non Destructive

scholarly journals Physic perspective fusion of electromagnetic acoustic transducer and pulsed eddy current testing in non-destructive testing system

2020 ◽  
Vol 378 (2182) ◽  
pp. 20190608
Author(s):  
Wei Guo ◽  
Bin Gao ◽  
Gui Yun Tian ◽  
Dan Si
Keyword(s):  
Eddy Current ◽  
Surface Defects ◽  
Eddy Current Testing ◽  
Non Destructive Testing ◽  
Electromagnetic Acoustic Transducer ◽  
Destructive Testing ◽  
Current Testing ◽  
Pulsed Eddy Current ◽  
Acoustic Transducer ◽  
Non Destructive

Comprehensive non-destructive testing (NDT) for pipelines is a critical and challenging task. This paper proposes a novel physic perspective fusion NDT method of electromagnetic acoustic transducer (EMAT) and pulsed Eddy current testing (PECT) for detecting hybrid defects. This transceiver-integrated fusion sensor structure can simultaneously excite ultrasound and pulsed eddy current. Therefore, the generated ultrasound is applied to detect deep defects, while the eddy current detects surface defects. The theoretical derivation of EMAT and PECT fusion mechanism has been developed for analysis and interpretation of the results. In addition, numerical simulation on the detection of hybrid defects including surface defects with different width, depth and multiple bottom-thinning defects has been conducted. Experiments on both ferromagnetic and non-ferromagnetic material verify the feasibility of composite detection. Finally, tests have been validated on pipeline with weld defects, and the results show that the composite inspection method is capable of monitoring thickness variations and inspecting surface defects. This article is part of the theme issue ‘Advanced electromagnetic non-destructive evaluation and smart monitoring’.

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