一种火车轮轨相对横向位移的图像检测方法

The Image Detection Method for Wheel-Rail Relative Lateral Displacement

目前通常采用的基于传感器的接触式测量方法,虽然可以监测机车运行状态并完善机车运行的安全性理论,但存在动态测量困难、零漂大和抗干扰能力差等缺点。针对轮轨接触状态最直接的反映——机车轮轨之间的相对位移,提出了一种火车轮轨相对横向位移的图像检测方法。将激光点以一定的角度照在车轮的平面上,把机车轮轨相对横向位移的测量转为车轮圆心与激光点在图片上位置的变化,最终实现车轮圆心和激光红点精确定位。实验结果表明,该方法能够准确地计算出轮轨相对横向位移,为后续进一步监测列车运行的状态以完善列车运行的安全性理奠定了基础。

The current contact measurement based on sensor is widely used in dynamic performance parameters detection for monitoring locomotive status and exploring the theory of locomotive safety.But it has several defects,such as being difficult to dynamic measurement、large zero drift and poor anti-jamming capability.In order to overcome these defects of the current contact measurement,the image detection method for wheel-rail relative lateral displacement,is proposed in this paper for that the wheel-rail relative displacement is the most direct reaction for wheel-rail contact status of locomotive.In the method,laser that maintained a certain angle with the ground hit on the plane of the wheel,and the wheel-rail relative lateral displacement can be acquired by the wheel center and laser on the change in position of the image.Consequently,the wheel center and laser position can be obtaining precisely.The experiment results show that the image detection method for wheel-rail relative lateral displacement can acquire wheel-rail relative lateral displacement,and it has great important significance to further exploring and evaluating locomotive safety mechanics.