METHOD OF CONTROLLING CONTINUOUS WELDED RAIL TRACK RAIL LENGTHS Russian patent published in 2012 - IPC B61K9/08 

FIELD: transport.

SUBSTANCE: invention relates to controlling continuous welded rail track rail lengths. Prior to laying rail length, stress concentration zone (SCZ) is defined from intrinsic magnetic scatter field (IMSF) by using magnetometer pickup to scan along rail head. Magnetic field scatter gradient Hp (dHp/dx) is defined in SCZ, where Hp is magnetic field intensity, A/m, x is analysed line of SCZ, and obtained data is stored as initial data. Then, rail length is again diagnosed in SCZ to define above said parameters after 50-150 mln t of freight is carried on track and obtained data is stored as data on 50-150 mln t of freight transportation. Obtained data is compared with initial data to define maximum parameters. Said zones are defined as most predisposed to failure. Revealed SCZs are subjected to additional intermittent control. Zones most predisposed to failure are subjected to additional control in case rail length temperature is 50-60 degrees below or 10-15 degrees above that of laying rail lengths. In case defect is detected, it is to be eliminated.

EFFECT: higher quality and validity.

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