ArticleSensors (Basel, Switzerland)2021
Evaluation of Coating Thickness Using Lift-Off Insensitivity of Eddy Current Sensor.
Article in Sensors (Basel, Switzerland), 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.
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Who cites it
11 citing papers in PubMed.
- Eddy current measurements of dielectric coating thickness on a weakly magnetic substrate within the medium frequency range.PloS one · 2026Article
- Recent Advances in Non-Destructive Testing Technology for Coated Steel Structure Welds.Sensors (Basel, Switzerland) · 2025Review
- Steel surface defect detection algorithm based on improved YOLOv10.Scientific reports · 2025Article
- A Precise Oxide Film Thickness Measurement Method Based on Swept Frequency and Transmission Cable Impedance Correction.Sensors (Basel, Switzerland) · 2025Article
- Eddy Current Sensor Array for Electromagnetic Sensing and Crack Reconstruction with High Lift-Off in Railway Tracks.Sensors (Basel, Switzerland) · 2024Article
- Design of a Remote, Multi-Range Conductivity Sensor.Sensors (Basel, Switzerland) · 2023Article
- Evaluation of the Properties of Eddy Current Sensors Based on Their Equivalent Parameters.Sensors (Basel, Switzerland) · 2023Article
- Computation of Eigenvalues and Eigenfunctions in the Solution of Eddy Current Problems.Sensors (Basel, Switzerland) · 2023Article
- Eddy Current Testing of Conductive Coatings Using a Pot-Core Sensor.Sensors (Basel, Switzerland) · 2023Article
- Model of Magnetically Shielded Ferrite-Cored Eddy Current Sensor.Sensors (Basel, Switzerland) · 2022Article
- Multisensor Inspection of Laser-Brazed Joints in the Automotive Industry.Sensors (Basel, Switzerland) · 2021Article
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Authors and funding
5 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
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.
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