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Evaluation of the residual magnetic field measurement system for early identification of railway defects

Rucki Mirosław, Gockiewicz Anna, Szumiata Tadeusz

Metrology and Measurement Systems

2019

Vol. 26, nr 4

687--696

The paper presents research on the capability of the residual magnetic field (RMF) measurement system to be applied to the railway inspection for the early non-destructive detection of defects. The metal magnetic memory (MMM) phenomena are analysed using normal component Hy of self-magnetic flux leakage (SMFL), and its tangential component Hx, as well as their respective gradients. The measurement apparatus is described together with possible factors that may affect the results of measurement. The Type A uncertainty estimation and repeatability tests were performed. The results demonstrate that the system may be successfully applied to detection of head check flaws.