Active steel rail damage monitoring method and terminal based on nonlinear ultrasonic waves

Abstract

The invention discloses an active steel rail damage monitoring method and terminal based on nonlinear ultrasonic waves, and belongs to the technical field of steel rail health monitoring, and the method comprises the following steps: a data training step: calculating damage grade thresholds of test signals of a steel rail in different states, and further establishing a mapping relation between different damage grades of the steel rail in different states and the test signals; and a monitoring and judging step: judging the state corresponding to the track detection signal, comparing the detection signal with the damage grade threshold value in the corresponding state, and further determining the damage grade of the steel rail. According to the method, by establishing the mapping relation between the different damage levels of the track in different states and the test signals, directional damage level judgment of the detection signals in different states can be achieved, the influence of different states on the characteristic parameters of the detection signals is eliminated, and therefore the false alarm rate of damage level detection is reduced; furthermore, the detection signal is judged based on multiple damage thresholds, so that the accuracy of damage grade judgment can be further improved.

Description

technical field [0001] The invention relates to the technical field of rail health monitoring, in particular to an active rail damage monitoring method and terminal based on nonlinear ultrasonic waves. Background technique [0002] With the continuous extension of railway operation mileage, the increase of train speed, traffic density and line service time have put forward higher requirements for train operation safety, track equipment maintenance efficiency and maintenance costs. As an important component of track equipment, turnouts play a vital role in the safe passage of trains. Since the point rail and the core rail are the key components for the switch to realize the switch, there are problems such as complex and changeable boundary conditions, large cross-section changes, and conventional flaw detection operations that cannot be quickly inspected, and become the weak link to ensure the safe service of the turnout. [0003] At present, there are mainly flaw detection ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the problem that real-time and accurate turnout prevention monitoring cannot be realized in the prior art, and to provide an active rail damage monitoring method and terminal based on nonlinear ultrasonic waves.

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