Scanning inductive pulse phase thermography with changing scanning speed for non-destructive testing
Research output: Contribution to journal › Article › Research › peer-review
Authors
Organisational units
External Organisational units
- Materials Center Leoben Forschungs GmbH
Abstract
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.
Details
Original language | English |
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Pages (from-to) | 156-171 |
Number of pages | 16 |
Journal | Quantitative InfraRed Thermography Journal |
Volume | 21.2024 |
Issue number | 3 |
DOIs | |
Publication status | Published - 2 Feb 2023 |