Koc Wladyslaw
Faculty of Civil and Environmental Engineering, Gdansk University of Technology, ul. G. Narutowicza 11/12, 80-233 Gdansk, Poland.
Sensors (Basel). 2024 Feb 9;24(4):1131. doi: 10.3390/s24041131.
The most effective method for determining the coordinates of the railway track axis is based on using mobile satellite measurements. However, there are situations in which the satellite signal may be disturbed (due to field obstructions) or completely disappear (e.g., in tunnels). In these situations, the ability to measure the value of the directional angle of a moving rail vehicle using an inertial system is useful. The directional angle is determined on a topographic map as the angle between the direction of the vehicle's longitudinal axis (or the direction of a tangent to the track axis) and the reference direction, which is the north. This article presents a method for determining the directional angle of a railway line based on appropriate measurement data. The latter should be Cartesian coordinates of the track axis, allowing for the visualization of a given railway route and permitting a general orientation of its course to be obtained. The presented proposal for solving the problem refers to the assumptions made in the method for determining the curvature of the railway track axis using the moving chord. The assumptions of the proposed method for determining the directional angle of the railway route are discussed, along with the appropriate computational algorithms. The accuracy of this method is assessed using the adopted model geometric layout. Reference is also made to the appropriate method for determining the curvature of the railway track axis. In conclusion, we provide an example of determining the directional angle based on measurement data.
确定铁轨轴线坐标最有效的方法是基于移动卫星测量。然而，存在一些情况，卫星信号可能会受到干扰（由于现场障碍物）或完全消失（例如，在隧道中）。在这些情况下，利用惯性系统测量移动轨道车辆方向角的值是有用的。方向角在地形图上被确定为车辆纵轴方向（或轨道轴线切线方向）与作为参考方向的北方之间的夹角。本文提出了一种基于适当测量数据确定铁路线路方向角的方法。后者应为轨道轴线的笛卡尔坐标，以便能够可视化给定的铁路路线并获得其路线的大致方向。所提出的解决该问题的方案参考了使用移动弦确定铁轨轴线曲率的方法中所做的假设。讨论了所提出的确定铁路路线方向角方法的假设以及相应的计算算法。使用所采用的模型几何布局评估该方法的准确性。还提及了确定铁轨轴线曲率的适当方法。最后，我们给出了一个基于测量数据确定方向角的示例。
