基于激光准直的轨道长波检测关键算法的研究

轨道不平顺是引起列车产生振动的主要原因。有资料报道,列车的激烈振动主要是轨道的长波不平顺引起的。轨道长波高平顺对高速列车安全、快速和舒适起关键性作用。目前,轨道长波不平顺尚无可靠、高效的检测手段。把激光准直技术应用到轨道长波不平顺检测是当前研究的一个方向。为减小激光准直精度对轨道长波检测精度的影响,提出分次测量、建立测量数据二维坐标转换模型,并对模型进行误差分析。应用Matlab进行算法仿真,测量精度比直接测量提高了约0.19 mm,表明该算法的可行性,可以应用于轨道长波不平顺检测。

Study on Key Algorithm of Track Long Wave Detection Based on Laser Alignment

Track irregularity is the principal factor which gives rise to vibration of train.It has been reported that the violent vibration of train is caused by long wave irregularity of track.That is,the long wave regularity plays a critical role in safety,speediness and ride comfort of high-speed train.At present,however,there is no reliable and efficient manner for the detection of long wave irregularities of track.So,it is a current research direction to introduce laser alignment technology into long wave irregularity detection of track.In order to weaken the unfavorable effect on long wave irregularity detection accuracy caused by laser alignment accuracy,a fractionated measurement method was proposed,two-dimensional coordinate transformation mode of measure data was established in this paper,and error analysis of the mode was carried out.Afterwards,the results of algorithm simulation using Matlab show that,the accuracy of this algorithm is about 0.19 mm higher than that of traditional algorithm,that is to say,this algorithm is feasible and can be used in long wave irregularity detection of the track.