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Auto-centering control system having abrasion compensation

A control system, automatic centering technology, applied in electric controllers, controllers with specific characteristics, material analysis using sonic/ultrasonic/infrasonic waves, etc. and other problems, to achieve the optimal effect, the best stability and reliability, and the best comprehensive effect.

Active Publication Date: 2018-09-11
ZHUZHOU TIMES ELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] (2) The rail head inside the rail has serious wear;
[0013] (3) Changes in the relationship between the wheel and the rail lead to a decrease in the ultrasonic incidence area of ​​the contact part between the probe wheel and the tread
In short, the above two articles are all about how to measure wear according to the standard regulations, but when the vehicle is moving, the track profile of the structured light is often incomplete, and the required data of the two positions may not be available.

Method used

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  • Auto-centering control system having abrasion compensation
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  • Auto-centering control system having abrasion compensation

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0064] The technical solution of this embodiment is to analyze the contact situation between (ultrasonic) probe wheel 1 and rail 3, and to study the influence of rail head wear on ultrasonic incident, thereby proposing a method of using the rail head wear value to automatically control the centering reference. The compensation control system reduces the loss of bottom wave and improves the detection effect of flaw detection.

[0065] as attached Figure 10 As shown, an embodiment of the automatic centering control system 10 with wear compensation of the present invention specifically includes:

[0066] Centering the sensor 7 to obtain the rail profile data inside the rail 3 and the actual position of the probe wheel 1;

[0067] The wear compensation calculation unit 9 calculates the wear amount of the rail head of the rail 3 according to the rail profile data inside the rail 3, calculates the wear compensation amount based on the wear amount, and compensates the centering ref...

Embodiment 2

[0088] As described in Embodiment 1, when S adopts the third gear for compensation, wear compensation can be realized to a certain extent to achieve the purpose of the present invention. In this case, mild wear can be canceled on the basis of fourth gear compensation in this embodiment Compensation, but this will lead to a delay in the intervention time of the wear compensation mechanism, which may cause some mild wave loss. However, when S adopts the fourth gear or above, due to the increase of the compensation threshold, it may lead to frequent changes of the reference, which may have a certain degree of influence on the stability of the control. Therefore, in actual situations, the compensation effect is the best when S adopts the fourth gear, which combines high precision, high speed, high stability and reliability of wear compensation.

[0089] The technical solution of this embodiment will be introduced below by taking the fourth gear compensation with the best comprehen...

Embodiment 3

[0101] Regarding the calculation of rail head wear, Embodiment 1 and Embodiment 2 adopt the area calculation method, which is a method suitable for graphical rail profile calculation. Other calculation methods can also be implemented, such as calculating the slope of the profile line of the rail head in this embodiment.

[0102] as attached Figure 9 As shown, the wear compensation calculation unit 9 determines the wear amount of the rail head of the rail 3 by calculating the slope k of the actual profile line C1 inside the rail head of the rail 3 . According to the rail head slope method, if the centering reference set on the non-wearing rail 3 is n 0 (unit: mm), then the centering reference is set to n when there is wear 0 -m, where the value of m (unit: mm) is determined according to the range of k. In order to maintain the stability of the control, the range of k is set to the third gear and above.

[0103] When the range of k is set to the third gear, the wear compensa...

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Abstract

The invention discloses an auto-centering control system having abrasion compensation, which includes: a centering sensor, which acquires profile data of a steel rail and actual position of a detectorwheel; an abrasion compensation computing unit, which calculates the abrasion quantity of a rail head of the steel rail according to the profile data of the steel rail, calculates abrasion compensation quantity according to the abrasion quantity, and compensates a centering basic value according to the abrasion compensation quantity at least by three levels; a PID control unit, which performs PIDcontrol and outputs a control value according to the compensated centering basic value outputted by the abrasion compensation computing unit and the actual position of the detector wheel; a centeringcontrol unit, which generates a driving control signal, which controls action of the detector wheel, according to the control value outputted by the PID control unit. The control system can solve thetechnical problem that on a steel rail, of which the rail head has serious abrasion, serious wave loss still exists even the centering system has normal deviation control.

Description

technical field [0001] The invention relates to the field of railway engineering, in particular to an automatic centering control system with wear compensation applied to the automatic centering control of a detection wheel of a rail flaw detection vehicle. Background technique [0002] At present, the automatic centering system officially used on the 80km / h rail flaw detection vehicle in China is imported from Sperry Company of the United States, which is expensive, and the spare parts are also expensive. The centering control algorithm is the core technology that is not transferred and is available for inquiry. There are very few literatures on the centering control algorithm for the rail status of domestic lines. Ultrasonic rail flaw detection is currently recognized worldwide as one of the most effective and important means for early detection of internal rail damage, reducing the risk of rail breakage, and improving train operation safety. The automatic centering contr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/22G05B11/42
CPCG01N29/225G01N2291/2623G05B11/42
Inventor 王文星李红梁谭勇夏浪高彪黄梦莹
Owner ZHUZHOU TIMES ELECTRONICS TECH CO LTD
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