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  • Casselgren, Johan, et al. (author)
  • An optical sensor for the identification of low adhesion in the wheel–rail contact
  • 2012
  • In: The international Journal of railway technology. - 2049-5358 .- 2053-602X. ; 1:3, s. 97-110
  • Journal article (peer-reviewed)abstract
    • Low adhesion between railway wheel and rail, usually induced by contaminants such as water, oil, and leaves, affects railway performance and safety. This study uses an optical sensor to identify various surface layers that cause low adhesion. In both a laboratory set-up and field tests under various conditions, the surface layers were identified by the optical sensor; in addition, the friction coefficients for the same surface layers were measured. The results indicate that the sensor can distinguish between different surface layers. This information, together with friction coefficient data, can be used in a prediction system for use by railway operators.
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