An automatic centering control device with wear compensation

Abstract

The invention discloses an automatic centering control device with wear compensation. The automatic centering control device with wear compensation comprises a centering sensor, a wear compensation calculating unit and a PID control unit, wherein the centering sensor is used for obtaining rail outline data of the internal side of a steel rail and an actual position of a wheel detector; the wear compensation calculating unit is used for calculating a railhead wear amount of the steel rail according to the rail outline data of the internal side of the steel rail, calculating the wear compensation amount by using the wear amount and compensating a centering reference value in at least three gears according to the wear compensation amount; and the PID control unit is used for performing PID control according to the compensated centering reference value output by the wear compensation calculating unit and the actual position of the wheel detector and outputting a centering control value. According to the automatic centering control device with wear compensation, the technical problem that the frequency is still seriously lost on the steel rail with serious railhead wear in the case of normal control error of a centering device can be solved.

Description

technical field [0001] The invention relates to the field of railway engineering, in particular to an automatic centering control device 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...

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

[0019] However, the above two articles both measure the wear of the rail head through the structured light visual measurement system. The theoretical basis is the provisions of the "Railway Line Maintenance Rules": the vertical wear Wv of the rail is at 1 / 3 of the width of the top surface of the rail ( Measured from the standard action side), the side wear Wh is measured at 16m below the top of the rail, and the total wear value This measurement method is mainly applicable when the measured rail and the measurement system are in a static state, and the structured light can completely reflect the outline, so that it is possible to obtain the required measurement point parameters

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.

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