Rail corrugation dynamic measurement method based on multi-line structured-light vision

被引：0
|
作者：
Ma Z. [1 ]
Dong Y. [1 ]
Liu H. [1 ]
Zhou B. [1 ]
Li Y. [1 ]
机构：
[1] College of Electrical and Information Engineering, Hunan University, Changsha
来源：
Yi Qi Yi Biao Xue Bao/Chinese Journal of Scientific Instrument | 2018年 / 39卷 / 06期
关键词：
Car body vibration; Hierarchical registration; Multi-line structured-light vision; Profile projection; Rail corrugation;
D O I：
10.19650/j.cnki.cjsi.J1803154
中图分类号：
学科分类号：
摘要：
High-precision dynamic rail corrugation measurement is critical to guarantee transport security and guide rail maintenance. Due to the random vibration, the onboard system in the current measurement method has lower precision. Thus, a novel rail corrugation measurement method based on multi-line structured-light vision is proposed in this paper. Firstly, we establish an auxiliary plane perpendicular to the rail longitudinal direction using the characteristics that the line between rail jaw points of several measurement profiles is parallel to the longitudinal direction, and we project measurement profiles to the auxiliary plane to calibrate profile distortion. Then, we accurately and gradually align the measurement profiles with reference profile through the hierarchical registration. Finally, the point of corrugation measurement is precisely located by using the fixed distance along the crosstie direction from it to the center of the arc in rail waist area, and the vertical distance between two points is regarded as the corrugation value of this section. The experimental results show the influence of vibration on the measurement data can be inhibited effectively by the proposed method. This work can provide a new idea and technical reference for the application of multi-line structured-light technique in the high-precision dynamic rail corrugation measurement. © 2018, Science Press. All right reserved.
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页码：189 / 197
页数：8
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