TY - JOUR

T1 - Scanning inductive pulse phase thermography with changing scanning speed for non-destructive testing

AU - Tuschl, Christoph

AU - Oswald-Tranta, Beata

AU - Agathocleous, Timotheos

AU - Eck, Sven

N1 - Publisher Copyright: © 2023 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.

PY - 2023/2/2

Y1 - 2023/2/2

N2 - This work aims at non-destructive detection of surface and subsur-face defects in metallic specimens (e.g. railway track components) via pulsed inductive thermography in a moving setup. A new approach for scanning with changing speed has been developed to enable manual scanning of components in track. A steel speci-men is heated with an inductor, and the surface temperature, including its variation over time, is recorded with an infrared cam-era. The infrared sequence is evaluated by Fourier transform to phase image, in order to increase the image quality. The proposed method uses a referencing object with AprilTags visible in each frame, allowing an adjustment by image registration. Changes in velocity during the scanning process are possible, as demonstrated by a manually performed scan of the specimen and the correspond-ing evaluation. Results obtained with different infrared cameras and scanning speeds were condensed into an estimation of the max-imum scanning speed for a given camera specification.

AB - This work aims at non-destructive detection of surface and subsur-face defects in metallic specimens (e.g. railway track components) via pulsed inductive thermography in a moving setup. A new approach for scanning with changing speed has been developed to enable manual scanning of components in track. A steel speci-men is heated with an inductor, and the surface temperature, including its variation over time, is recorded with an infrared cam-era. The infrared sequence is evaluated by Fourier transform to phase image, in order to increase the image quality. The proposed method uses a referencing object with AprilTags visible in each frame, allowing an adjustment by image registration. Changes in velocity during the scanning process are possible, as demonstrated by a manually performed scan of the specimen and the correspond-ing evaluation. Results obtained with different infrared cameras and scanning speeds were condensed into an estimation of the max-imum scanning speed for a given camera specification.

KW - inductive thermography

KW - image registration

KW - scanning

KW - defect detection

KW - rolling contact fatigue

KW - Inductive thermography

KW - image registration

KW - scanning

KW - defect detection

KW - Rolling contact fatigue

UR - http://www.scopus.com/inward/record.url?scp=85147567141&partnerID=8YFLogxK

U2 - 10.1080/17686733.2023.2170159

DO - 10.1080/17686733.2023.2170159

M3 - Article

VL - 21.2024

SP - 156

EP - 171

JO - Quantitative InfraRed Thermography Journal

JF - Quantitative InfraRed Thermography Journal

SN - 1768-6733

IS - 3

ER -