Method and device for dynamic detection of railway turnout states

Abstract

The invention provides a method and device for dynamic detection of railway turnout states. The method comprises the steps: acquiring an axle box accelerated speed of a comprehensive detection train on the whole railway line; calculating a peak value factor of a mobile effective value of the axle box accelerated speed and finding out the peak value factor corresponding to a turnout on the railway line based on turnout parameters; comparing the peak value factor corresponding to the turnout and a threshold value of a present normalized peak value factor and judging state performance of the turnout according to the compared result. Compared with the direct adoption of axle box accelerated speed amplitude, the threshold value of the normalized peak value factor is capable of effectively reducing influences of various random factors on judgment results and is capable of normalizing different judging manners of the axle box accelerated speeds of different vehicles, thus a feasible detection scheme for dynamically detecting the turnout states by utilizing the peak value factor of the mobile effective value of the axle box accelerated speed is provided. The invention is applicable to dynamically detecting turnouts of high-speed railways.

Description

technical field [0001] The invention relates to a track turnout detection technology, in particular to a method and device for dynamically detecting the state of a railway turnout aimed at comprehensively detecting the acceleration of a train axle box. Background technique [0002] For a long time, the joints and curves of turnouts and rails have been called the three weak links of the track structure. The development of seamless lines and the strengthening of curved tracks have gradually improved the working conditions of the track structure, resulting in turnouts becoming the weakest link of the railway track and the key equipment to limit the speed of traffic. Especially on high-speed passenger dedicated lines, the safety of turnouts is particularly important. In addition to design and construction, detection and maintenance of turnouts is also an important task. At present, the maintenance of turnouts in our country is after manual failure. On high-speed lines, once a ...

AI Technical Summary

Problems solved by technology

[0005] (1) The amplitude of the axlebox acceleration is highly random: the high-frequency component of the axlebox acceleration is generally used to judge the state of the turnout, which corresponds to almost the same working conditions. At the same turnout, the amplitude of the axlebox acceleration may differ by more than one time;

[0006] (2) The characteristic parameters of the axlebox acceleration vary greatly: the characteristic parameters of the axlebox acceleration vary with the vehicle, direction, and speed, and may differ by an order of magnitude, making it difficult to determine the absolute threshold

[0007] Therefore, there is currently no feasible technical solution for dynamic detection of turnout status by using the acceleration of the axle box

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