A METHOD FOR DETERMINING THE LENGTHS OF RAILS OF EQUALIZING SPANS AND PLACES OF TEMPORARY REPAIR OF THE BAR BY FLAW DETECTION SIGNALS Russian patent published in 2022 - IPC B61K9/08 E01B35/00 

FIELD: non-destructive testing.

SUBSTANCE: invention relates to methods of non-destructive testing of metals and can be used for the maintenance and operation of railway infrastructure by determining the exact coordinates and parameters of sections of rail tracks detected using flaw detection. The method comprises installation of a rail flaw detection tools on the rail moving unit, as well as the installation of global satellite navigation and relative navigation systems using the wheel of the moving unit, the moving unit is moved along the rail track, the rails are constantly tested by flaw detection tools, response signals are received from the rails, the coordinates of which are stored in the form of a flaw diagram of the rail track together with data navigation systems, the signals of the flaw detection tools are analyzed. At the time of the flaw detection, the temperature of the rails is measured, the lengths of regular objects of the rail bar are isolated and measured according to the flaw diagram, their average value is determined, a correction factor is obtained as the ratio of the lengths of the measured average value to the specified length of regular objects. Taking into account the obtained coefficient and temperature, the actual values of the lengths of the equalizing and temporary rails of the bar are calculated. The values of the joint stagger on one rail line are determined relative to the opposite joints on the other line by comparing the coordinates of the signals from the bolted joints on both lines.

EFFECT: present invention improves the accuracy and reliability of determining the lengths of the rails of the equalization spans and the places of temporary repair of the rail bar using the flaw detection signals in automatic mode.

1 cl, 4 dwg