Information Fusion for Borescope and Eddy Current Integrative Nondestructive Testing Technique to Detect Defects in Aeroengine

2009 ◽  
Author(s):  
Tian Wugang ◽  
Pan Mengchun ◽  
Luo Feilu ◽  
Chen Dixiang
Keyword(s):  
Nondestructive Testing ◽  
Information Fusion ◽  
Eddy Current ◽  
Testing Technique

Electromagnetic methods in nondestructive testing of materials

2003 ◽  
Vol 16 (1) ◽  
pp. 1-23
Author(s):  
Konstanty Gawrylczyk
Keyword(s):  
Sensitivity Analysis ◽  
Finite Elements ◽  
Nondestructive Testing ◽  
Eddy Current ◽  
Quality Evaluation ◽  
Leakage Flux ◽  
Electromagnetic Methods ◽  
Conducting Materials ◽  
Inductive Methods ◽  
Flux Probe

The article deals with progress in electromagnetic methods used for quality evaluation of conducting materials. The term "electromagnetic methods" covers the following areas: magneto-inductive methods, magnetic leakage flux probe method, magnetometer principle and eddy-current methods. For the aim of numerical cracks recognition the sensitivity analysis with finite elements was shown.

scholarly journals Evaluation of Coating Thickness Using Lift-Off Insensitivity of Eddy Current Sensor

Sensors ◽  
2021 ◽  
Vol 21 (2) ◽  
pp. 419
Author(s):  
Xiaobai Meng ◽  
Mingyang Lu ◽  
Wuliang Yin ◽  
Abdeldjalil Bennecer ◽  
Katherine J. Kirk
Keyword(s):  
Eddy Current ◽  
Coating Thickness ◽  
Thickness Measurement ◽  
Eddy Current Testing ◽  
Thickness Variation ◽  
Testing Technique ◽  
Current Testing ◽  
Thin Skin ◽  
Embedded Algorithms ◽  
Lift Off

Defect detection in ferromagnetic substrates is often hampered by nonmagnetic coating thickness variation when using conventional eddy current testing technique. The lift-off distance between the sample and the sensor is one of the main obstacles for the thickness measurement of nonmagnetic coatings on ferromagnetic substrates when using the eddy current testing technique. Based on the eddy current thin-skin effect and the lift-off insensitive inductance (LII), a simplified iterative algorithm is proposed for reducing the lift-off variation effect using a multifrequency sensor. Compared to the previous techniques on compensating the lift-off error (e.g., the lift-off point of intersection) while retrieving the thickness, the simplified inductance algorithms avoid the computation burden of integration, which are used as embedded algorithms for the online retrieval of lift-offs via each frequency channel. The LII is determined by the dimension and geometry of the sensor, thus eliminating the need for empirical calibration. The method is validated by means of experimental measurements of the inductance of coatings with different materials and thicknesses on ferrous substrates (dual-phase alloy). The error of the calculated coating thickness has been controlled to within 3% for an extended lift-off range of up to 10 mm.

FEA Design and Misfit Minimization for In-Depth Flaw Characterization in Metallic Plates With Eddy Current Nondestructive Testing

2009 ◽  
Vol 45 (3) ◽  
pp. 1506-1509 ◽  
Author(s):  
M. Cacciola ◽  
S. Calcagno ◽  
G. Megali ◽  
F.C. Morabito ◽  
D. Pellicano ◽  
...  
Keyword(s):  
Nondestructive Testing ◽  
Eddy Current ◽  
Flaw Characterization ◽  
Metallic Plates

Laser speckle photometry: contactless nondestructive testing technique

2012 ◽  
Author(s):  
Ulana Cikalova ◽  
Juergen Nicolai ◽  
Beatrice Bendjus ◽  
Juergen Schreiber
Keyword(s):  
Nondestructive Testing ◽  
Laser Speckle ◽  
Testing Technique

Simulation and design of a superconducting eddy current probe for nondestructive testing

1998 ◽  
Vol 69 (2) ◽  
pp. 499-506 ◽  
Author(s):  
James R. Claycomb ◽  
Nilesh Tralshawala ◽  
Hsiao-Mei Cho ◽  
Mike Boyd ◽  
Zhongji Zou ◽  
...  
Keyword(s):  
Nondestructive Testing ◽  
Eddy Current

scholarly journals Defect detection in conducting materials using eddy current testing techniques

2014 ◽  
Vol 11 (4) ◽  
pp. 535-549 ◽  
Author(s):  
Hartmut Brauer ◽  
Marek Ziolkowski ◽  
Hannes Toepfer
Keyword(s):  
Eddy Current ◽  
Eddy Current Testing ◽  
Internal Defects ◽  
Testing Technique ◽  
Defect Identification ◽  
Testing Conditions ◽  
Current Testing ◽  
Conducting Materials ◽  
Testing Techniques ◽  
Electrical Conductors

Lorentz force eddy current testing (LET) is a novel nondestructive testing technique which can be applied preferably to the identification of internal defects in nonmagnetic moving conductors. The LET is compared (similar testing conditions) with the classical eddy current testing (ECT). Numerical FEM simulations have been performed to analyze the measurements as well as the identification of internal defects in nonmagnetic conductors. The results are compared with measurements to test the feasibility of defect identification. Finally, the use of LET measurements to estimate of the electrical conductors under test are described as well.

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