High-speed Alternating Field Current Measurement (ACFM) tests were carried out using a rotary test piece that contained spark eroded notches. The ACFM sensor detected the induced notches at 121. 5km/h while the recorded signal intensity remained largely unaffected by the increases in speed under constant lift-off. To simulate actual rail inspection conditions at high speed, further tests were carried out using a spinning rail rig and a set of rails that contained spark eroded notches of various shapes and sizes up to a speed of 48 km/h. The ACFM sensor successfully detected the artificially induced notches however the signal was affected by severe lift-off variations that occurred during testing.
High-speed inspection of rolling contact fatigue in rails using ACFM sensors
Hochgeschwindigkeitsprüfung von Wälzermüdung in Schienen mittels Wechselfeld-Strommess-Sensoren
2008
9 Seiten, 8 Bilder, 9 Quellen
Conference paper
Storage medium
English
High-speed inspection of rails using ACFM techniques
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