Thickness evaluation of hollow nonmagnetic cylinders utilizing a motional eddy current

Mirzaei, Mehran; Ripka, Pavel; Grim, Václav; Jelínek, Lukáš; Svatoš, Jakub

doi:10.1016/j.measurement.2021.110463

Cited by 5 publications

(2 citation statements)

References 36 publications

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“…When metallic conductors are in motion, relative movement occurs between them and the inspection probe, resulting in the generation of motion-induced eddy currents within the metal [16,17]. Additionally, several scholars [18][19][20][21][22] have proposed defect detection methods based on this principle to assess defects present on the surfaces and subsurfaces of metal.…”

Section: Introductionmentioning

confidence: 99%

Non-ferromagnetic thin metal micron-sized defect detection system based on a coherent accumulation-difference method

Wei,

Chen,

Liu

et al. 2024

Meas. Sci. Technol.

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Copper and aluminum foils serve as predominant materials in fluid collectors, and defects within them can significantly impact the electrochemical performance of cells. However, existing methods for detecting defects within non-ferromagnetic thin metals, such as copper and aluminum foils, have several limitations. This study aims to address the need for detecting micrometer-scale defects on 0.1 mm copper foils, aligning with industrial field requirements. We devised an inspection device based on the induced magnetic field detection principle and explored the impact of copper foil undulations on micrometer-scale defect detection using COMSOL modeling. Subsequently, we introduced a coherent cumulative-differential algorithm to effectively mitigate the influences of circuit noise and sampling heave noise on defect signals. Consequently, the signal-to-noise ratios of 100- and 200-micron defect signals were significantly improved by 157% and 234%, respectively. This approach shows promise for detecting micrometer-scale defects in non-ferromagnetic thin metals and lays a robust foundation for future defect identification and inversion endeavors.

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Section: Introductionmentioning

confidence: 99%

Non-ferromagnetic thin metal micron-sized defect detection system based on a coherent accumulation-difference method

Wei,

Chen,

Liu

et al. 2024

Meas. Sci. Technol.

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show abstract

“…Eddy current testing is commonly used in many industries for the nondestructive evaluation of metal products. The tests are carried out using a single sensor in the form of a coil [ 1 , 2 , 3 , 4 , 5 , 6 ] or a system consisting of several coils constituting one sensor [ 7 , 8 , 9 , 10 , 11 , 12 ]. The basic idea of such an inspection is to utilise the phenomenon of electromagnetic induction.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Properties of Eddy Current Sensors Based on Their Equivalent Parameters

Dziczkowski

Tytko

2023

Sensors

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This paper presents a practical way of using the method of evaluating the metrological properties of eddy current sensors. The idea of the proposed approach consists of employing a mathematical model of an ideal filamentary coil to determine equivalent parameters of the sensor and sensitivity coefficients of tested physical quantities. These parameters were determined on the basis of the measured value of the real sensor’s impedance. The measurements were carried out with an air-core sensor and an I-core sensor while they were positioned at different distances from the surface of tested copper and bronze plates. An analysis of the influence of the coil’s position in relation to the I core on the equivalent parameters was also carried out, and the interpretation of the results obtained for various sensor configurations was presented in a graphical form. When equivalent parameters and sensitivity coefficients of examined physical quantities are known, it is possible to compare even very different sensors with the employment of one measure. The proposed approach makes it possible to make a significant simplification of the mechanisms of calibration of conductometers and defectoscopes, computer simulation of eddy current tests, creating the scale of a measuring device, and designing sensors.

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Measurement of multilayered conductive discs using eddy current method

Tytko

2022

Measurement

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Thickness evaluation of hollow nonmagnetic cylinders utilizing a motional eddy current

Cited by 5 publications

References 36 publications

Non-ferromagnetic thin metal micron-sized defect detection system based on a coherent accumulation-difference method

Non-ferromagnetic thin metal micron-sized defect detection system based on a coherent accumulation-difference method

Evaluation of the Properties of Eddy Current Sensors Based on Their Equivalent Parameters

Measurement of multilayered conductive discs using eddy current method

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