Rail inspection device and rail inspection system

摘要

A rail inspection device comprises a carriage having wheels, a first roller in contact with a side surface of a first rail, a second roller in contact with a side surface of a second rail, a first position sensor configured to detect a position of a side surface of the first rail or an outer surface of the first roller, a second position sensor configured to detect a position of a side surface of the second rail or an outer surface of the second roller, and at least one rotation sensor each configured to detect a rotation angle of a wheel, the first roller, or the second roller.