In this work, we show some results from inspecting rail pieces after induction and line laser thermographic tests, considering the inspected component moving at speeds up to about 12 km/h. With an image reconstruction algorithm and some filter operations unique images of rail piece have been obtained, showing the information related to surface defects and their dimensions and position. Additionally, different coil geometries have been developed and proposed to optimize induction inspection. To align with on-site applications, the experimental tests have been performed considering a setup configuration with mirrors. Following an investigation into the effects of test parameters on the detectability of the relevant cracks, such as scan speed, frame rate and type of excitation, a preliminary procedure for detecting real cracks is introduced, tailored for on-site applications, and validated through experimental results. |
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Thermography
Head
Inspection
Visual inspection
Defect detection
Industry