Method and system for wheel derailment alarm

Abstract

The invention discloses a wheel derailment alarm method. The method comprises the steps that when a vibration signal is obtained, the vibration signal is processed to obtain a sample to be analyzed; time domain identification is conducted on the sample to be analyzed, and the time domain derailment identification result is obtained; a corresponding spectrum is obtained by conducting fast Fourier transform on the sample to be analyzed; frequency domain identification is conducted on the spectrum, and the frequency domain derailment identification result is obtained; derailment analysis is carried out according to the time domain derailment identification result and / or the frequency domain derailment identification result; and if the obtained analysis result is wheel derailment, alarm operation is carried out. The method can accurately carry out derailment alarm, the whole derailment alarm process is stable and reliable, and the probability of misinformation is greatly reduced. The invention further discloses a wheel derailment alarm system which has the above beneficial effects.

Description

technical field [0001] The invention relates to the field of rail transportation, in particular to a method and system for wheel derailment alarm. Background technique [0002] With the rapid development of science and technology, rail transit technology is growing rapidly like mushrooms after rain, so the needs and requirements for railway traffic safety are getting higher and higher, especially in the aspect of wheel derailment, it is becoming more and more important to choose a suitable alarm standard. [0003] In the existing technology, the basic method of judging the derailment risk at home and abroad is to use the ratio of the wheel-rail lateral force Q to the vertical force P, that is, the derailment coefficient to judge the derailment risk in the design and operation process, and the derailment coefficient is stipulated to be less than 1.2 as safe . However, in the actual operation of the train, it is affected by many external conditions such as track irregularitie...

AI Technical Summary

Problems solved by technology

However, in the actual operation of the train, it is affected by many external conditions such as track irregularities, super high curves, vehicle speed, load, etc., and it is difficult to describe it with a single theoretical formula. Therefore, the United States found that the derailment coefficient was equal to At 2:00 a.m., my country Railway Science and Technology Research Institute even found an example of the train being safe and sound when the derailment coefficient was as high as 4.98 in the derailment test of the freight train. Therefore, it is difficult to fully and effectively evaluate the risk of derailment and prevent derailment accidents by using the derailment coefficient

Of course, the following methods also exist in the prior art: directly detect whether the contact state between the wheel and the track or the connection state of each compartment is normal, but the above-mentioned method also has the problem of derailment false alarm

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