Analysis of the Parameters of Bottom Signals in the Area of Welded Joints of Rails under High-Speed Ultrasonic Testing

This research is a continuation of the work aimed at analyzing the parameters of ultrasonic signals during high-speed rail inspection. The analysis of the behavior of the amplitudes of the sequences of bottom signals in the zone most problematic for the continuous-welded track, i.e., the zone of the welded joints of rails, has been carried out in a wide range of inspection speeds. It is shown that, starting from certain scanning speeds, in accordance with the current regulatory and technical documentation, many zones of welded joints can be attributed to unscanned areas. The research results can be used to optimize the designs of scanning systems for high-speed diagnostic systems and to substantiate permissible rail-track scanning speeds.