Diagnosis of Artificial Flaws from Eddy Current Testing Signals Based on Sweep Frequency Non-Destructive Evaluation

An investigation of artificial flaws in electromagnetic non-destructive evaluation using eddy-current frequency-response analysis is carried out in this study. A new approach incorporating innovative solution is proposed. The goal was to increase the resolution of gained signals in contrast to the c...

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Bibliographic Details
Published inApplied sciences Vol. 12; no. 8; p. 3732
Main Authors Vaverka, Filip, Smetana, Milan, Gombarska, Daniela, Janousek, Ladislav
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.04.2022
Subjects
artificial flaws
Automation
Coordinate transformations
Eddy current testing
Eddy currents
Electric discharge machining
Electromagnetism
Frequency analysis
Frequency response
harmonic excitation
Instrumentation
Molybdenum steel
non-destructive evaluation
Nondestructive testing
Signal to noise ratio
Simulation
Software
Sweep frequency
sweep frequency approach
Ultrasonic imaging
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Summary:An investigation of artificial flaws in electromagnetic non-destructive evaluation using eddy-current frequency-response analysis is carried out in this study. A new approach incorporating innovative solution is proposed. The goal was to increase the resolution of gained signals in contrast to the conventional sweep-frequency method. The proposed procedure was tested on real material specimens where differential responses were gained from artificial electro-discharge machined flaws. Two plate specimens having EDM flaws of various dimensions were inspected. Eddy-current responses due to the material flaws were sensed and compared to a dataset that was obtained by numerical modelling. The presented unique results clearly show that the resolution of a fixed probe driven with sweep-frequency excitation signal can be increased when the appropriate probe instrumentation is used and the characteristics are further mathematically processed.
ISSN:2076-3417
2076-3417
DOI:10.3390/app12083732