Comparison of Inspecting Non-Ferromagnetic and Ferromagnetic Metals Using Velocity Induced Eddy Current Probe

Comparison of Inspecting Non-Ferromagnetic and Ferromagnetic Metals Using Velocity Induced Eddy Current Probe

A velocity induced eddy current probe has been used to detect cracks in both non-ferromagnetic and ferromagnetic metals. The simulation and experimental results show that this probe can successfully detect cracks in both cases, but further investigation shows that the underlying principles for inspe...

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Bibliographic Details
Main Authors: Bo Feng, Artur L. Ribeiro, Tiago J. Rocha, Helena G. Ramos
Format: Article
Language:English
Published: MDPI AG 2018-09-01
Series:Sensors
Subjects:
velocity induced eddy current
non-destructive testing
velocity effect
eddy current testing
Online Access:http://www.mdpi.com/1424-8220/18/10/3199
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spelling doaj-4b162d833ce5465c811f2831d9a18c962020-11-25T00:54:56ZengMDPI AGSensors1424-82202018-09-011810319910.3390/s18103199s18103199Comparison of Inspecting Non-Ferromagnetic and Ferromagnetic Metals Using Velocity Induced Eddy Current ProbeBo Feng0Artur L. Ribeiro1Tiago J. Rocha2Helena G. Ramos3Instituto de Telecomunicações, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, PortugalInstituto de Telecomunicações, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, PortugalInstituto de Telecomunicações, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, PortugalInstituto de Telecomunicações, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, PortugalA velocity induced eddy current probe has been used to detect cracks in both non-ferromagnetic and ferromagnetic metals. The simulation and experimental results show that this probe can successfully detect cracks in both cases, but further investigation shows that the underlying principles for inspecting non-ferromagnetic and ferromagnetic metals are actually different. For an aluminum plate, the induced eddy current density and the signal amplitude both increase with probe speed, which means the signal is caused by velocity induced eddy currents. For a steel plate, probe speed changes the baselines of the testing signals; however, it has little influence on signal amplitudes. Simulation results show that the signal for cracks in a steel plate is mainly caused by direct magnetic field perturbation rather than velocity induced eddy currents.http://www.mdpi.com/1424-8220/18/10/3199velocity induced eddy currentnon-destructive testingvelocity effecteddy current testing
collection DOAJ
language English
format Article
sources DOAJ
author Bo Feng
Artur L. Ribeiro
Tiago J. Rocha
Helena G. Ramos
spellingShingle Bo Feng
Artur L. Ribeiro
Tiago J. Rocha
Helena G. Ramos
Comparison of Inspecting Non-Ferromagnetic and Ferromagnetic Metals Using Velocity Induced Eddy Current Probe
Sensors
velocity induced eddy current
non-destructive testing
velocity effect
eddy current testing
author_facet Bo Feng
Artur L. Ribeiro
Tiago J. Rocha
Helena G. Ramos
author_sort Bo Feng
title Comparison of Inspecting Non-Ferromagnetic and Ferromagnetic Metals Using Velocity Induced Eddy Current Probe
title_short Comparison of Inspecting Non-Ferromagnetic and Ferromagnetic Metals Using Velocity Induced Eddy Current Probe
title_full Comparison of Inspecting Non-Ferromagnetic and Ferromagnetic Metals Using Velocity Induced Eddy Current Probe
title_fullStr Comparison of Inspecting Non-Ferromagnetic and Ferromagnetic Metals Using Velocity Induced Eddy Current Probe
title_full_unstemmed Comparison of Inspecting Non-Ferromagnetic and Ferromagnetic Metals Using Velocity Induced Eddy Current Probe
title_sort comparison of inspecting non-ferromagnetic and ferromagnetic metals using velocity induced eddy current probe
publisher MDPI AG
series Sensors
issn 1424-8220
publishDate 2018-09-01
description A velocity induced eddy current probe has been used to detect cracks in both non-ferromagnetic and ferromagnetic metals. The simulation and experimental results show that this probe can successfully detect cracks in both cases, but further investigation shows that the underlying principles for inspecting non-ferromagnetic and ferromagnetic metals are actually different. For an aluminum plate, the induced eddy current density and the signal amplitude both increase with probe speed, which means the signal is caused by velocity induced eddy currents. For a steel plate, probe speed changes the baselines of the testing signals; however, it has little influence on signal amplitudes. Simulation results show that the signal for cracks in a steel plate is mainly caused by direct magnetic field perturbation rather than velocity induced eddy currents.
topic velocity induced eddy current
non-destructive testing
velocity effect
eddy current testing
url http://www.mdpi.com/1424-8220/18/10/3199
work_keys_str_mv AT bofeng comparisonofinspectingnonferromagneticandferromagneticmetalsusingvelocityinducededdycurrentprobe
AT arturlribeiro comparisonofinspectingnonferromagneticandferromagneticmetalsusingvelocityinducededdycurrentprobe
AT tiagojrocha comparisonofinspectingnonferromagneticandferromagneticmetalsusingvelocityinducededdycurrentprobe
AT helenagramos comparisonofinspectingnonferromagneticandferromagneticmetalsusingvelocityinducededdycurrentprobe
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