Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Wheel derailment alarm method and system

A technology of wheels and sleepers, which is applied in the field of rail transit, can solve the problems of derailment false alarms, difficulty in completely and effectively evaluating derailment risks and derailment accidents, and achieve the effect of reducing the probability of false alarms, stable and reliable derailment alarm process, and accurate derailment alarm

Active Publication Date: 2017-12-29
TANGZHI SCI & TECH HUNAN DEV CO LTD
View PDF5 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Wheel derailment alarm method and system
  • Wheel derailment alarm method and system
  • Wheel derailment alarm method and system

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0072] Among them, there are many methods of performing resonance demodulation on the vibration signal to obtain the resonance demodulation signal, and two examples are given below to illustrate. Example 1: When the vibration signal is acquired, the speed pulse signal of the speed sensor installed on the wheel shaft or other shafts through gear transmission is used to process the speed tracking sampling control signal FC that is C times the FN of the wheel speed frequency (i.e. FC=C*FN, wherein C is a positive integer such as C=400), and the speed pulse signal is processed as the speed tracking filter control signal FL of C*L times of the wheel speed frequency FN (wherein L is a positive integer, such as L= 20), using the rotational speed tracking filtering control signal FL to trigger acquisition of the resonance demodulation signal. Example 2: In the absence of the control signal FL, after the vibration signal is obtained by timing high-speed sampling and resonantly demodula...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

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...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B61C17/00
CPCB61C17/00
Inventor 唐德尧李修文
Owner TANGZHI SCI & TECH HUNAN DEV CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Eureka Blog
Learn More
PatSnap group products