中国激光, 2013, 40 (2): 0208002, 网络出版: 2013-01-17
高速列车动态包络线测量系统
Measurement System for Dynamic Envelope Curve of High-Speed Train
测量 机器视觉 动态包络线 动态限界 高速列车 校准 measurement machine vision dynamic envelope curve dynamic gauge high-speed train calibration
摘要
动态包络线是制定动态限界的主要依据,准确得到动态包络线是车辆设计过程中的一项重要内容,也是安全行车的重要保障。针对当前车辆动态包络线的获取主要通过计算手段这一情况,设计了高速列车动态包络线测量系统。系统基于双目视觉测量原理,利用大功率线激光瞬时光源构造测量特征,通过高速采集、处理、解算能反映列车动态偏移的被测信息,得到高速列车行驶过程中的动态包络线。提出了一种现场系统校准方法,快速、有效地建立双相机之间的位置关系、轨道中心坐标系及其与测量系统坐标系之间的转换关系。实验结果表明,系统测量精度可达±0.5 mm,实现了高速列车动态包络线的真实可靠测量,为高速列车动态限界的制定提供数据支持。
Abstract
Dynamic envelope curve is one of the key factors to be considered when defining the dynamic gauge. To accurately obtain the dynamic envelope curve is one big step in design vehicle and also an insurance against dangers in driving. Since the major way to obtain dynamic envelope curve now is by enormous calculation, a measurement system is designed for measuring dynamic envelope curve of high-speed train. Based on binocular vision, the system produces the feature using high power pulse laser, and obtains the dynamic envelope curve of the high-speed train by high-speed acquisition, process and calculation of information that reflects the excursion of train. One field calibration method is proposed to build quickly and efficiently both the position relationship between the two cameras and the transformation between center coordinate system of railway and coordinate system of measurement system. It is proved by experimental results that the measurement precision of the system can reach up to ±0.5 mm, and that the measurement of the dynamic envelope curve of high-speed train is accomplished with high reliability, which can provide useful statistics for the definition of dynamic gauge of high-speed train.
郭寅, 刘常杰, 邾继贵, 刘刚, 高福来, 叶声华. 高速列车动态包络线测量系统[J]. 中国激光, 2013, 40(2): 0208002. Guo Yin, Liu Changjie, Zhu Jigui, Liu Gang, Gao Fulai, Ye Shenghua. Measurement System for Dynamic Envelope Curve of High-Speed Train[J]. Chinese Journal of Lasers, 2013, 40(2): 0208002.