Locomotive positioning method and system

Abstract

The invention discloses a locomotive positioning method and system. The locomotive positioning method comprises the following steps: determining the state of current positioning environment; when an LKJ is in the monitoring state and satellite signal is available, obtaining the position data of the LKJ and the position data of a GPS / BD, wherein the LKJ positioning manner is used as the main manner, and the GPS positioning assists to rectify deflected positions; when the LKJ is in the monitoring state and no satellite signal is available, obtaining the position data of the LKJ, wherein positioning is performed by the LKJ manner; when the LKJ is in the non-monitoring state and satellite signal is available, obtaining the continuous preset number of GPS coordinate data of a locomotive, and the locomotive is positioned according to the GPS coordinate data; and when the LKJ is in the non-monitoring state and no satellite signal is available, positioning the locomotive by adopting a speed-measurement positioning method and a dead reckoning method. An LKJ positioning method and a GPS positioning method are combined, so that the problem that the locomotive cannot be accurately positioned in a whole journey is solved, and the locomotive positioning method is continuous in positioning, and high in positioning precision.

Description

technical field [0001] The invention relates to the field of train positioning control in the railway industry, in particular to a locomotive positioning method and system. Background technique [0002] At present, the application information system and dispatching system put into operation of the railway system have greatly improved the level of train dispatching, and there have been many methods of train positioning, such as the track circuit potential method, the position data positioning method of the train operation monitoring device LKJ, and the satellite positioning method. [0003] However, in the above-mentioned train positioning methods, the positioning accuracy of the track circuit positioning method depends on the length of the track circuit, which is not accurate. In order to achieve a more accurate positioning, other methods are needed to supplement; When the LKJ is in the non-monitoring mode, the LKJ position data cannot be obtained. For example, when the LKJ ...

AI Technical Summary

Problems solved by technology

[0003] However, in the above-mentioned train positioning methods, the positioning accuracy of the track circuit positioning method depends on the length of the track circuit, which is not accurate. In order to achieve a more accurate positioning, other methods are needed to supplement; When the LKJ is in the non-monitoring mode, the LKJ position data cannot be obtained. For example, when the LKJ is in the degraded or shunting mode, the train (locomotive) positioning cannot be performed; the satellite positioning method is in the satellite positioning system, the accuracy of the global positioning system GPS or Beidou BD Basically, the positioning accuracy of civilian satellite receiving modules is within 10-20 meters, and it is easily affected by weather factors, electrical electromagnetic interference, and shelters (in buildings, valleys, canyons, tunnels), so it is impossible to achieve full real-time Therefore, each application information system has poor timeliness and is not comprehensive enough to grasp the train operation information, and lacks real-time monitoring of the train (locomotive) operation process, so that it is impossible to issue an accurate dispatch plan, and it is impossible to perform a refined forecast on train operation

At present, there is no precise positioning method in the railway industry that can realize real-time precise positioning during the whole process of train (locomotive) operation.

Images