CN-122009280-A - Train driving synchronization system and method based on real-time positioning

Abstract

The application relates to the technical field of train driving assistance, in particular to a train driving synchronization system and method based on real-time positioning. The method comprises the steps of acquiring high-definition video resources of key sections along a railway, establishing a database, combining real-time position information of a train, dynamically calling the video resources of a front line, and displaying the video resources on a display screen of a cockpit accurately and synchronously through low-delay transmission to support interactive operation of a driver. The application can realize the deep fusion of the train driving environment and the video monitoring system, improve the beyond visual range sensing capability of a driver, grasp the change of the line environment in advance, quickly respond to sudden dangerous situations and obviously improve the running safety and the intelligent level of the train.

Inventors

• LI SHUO
• YANG LEI
• LEI HAIYAN
• YANG JIAYU
• WANG GUOQIANG
• WANG NA
• ZHOU MINGWEI
• GUO HUI
• QIN ZHENGYANG
• WANG WANQI
• XIE YALONG
• WANG KEWEI
• XU WENSHENG
• WANG ZHIHUA
• GUO PENGFEI

Assignees

• 中国铁道科学研究院集团有限公司电子计算技术研究所
• 中国铁道科学研究院集团有限公司
• 北京经纬信息技术有限公司

Dates

Publication Date

20260512

Application Date

20260304

Claims (10)

1. 1. A real-time positioning-based train driving synchronization system, comprising: the data acquisition module is used for acquiring high-definition video resources of key sections along the railway and establishing a retrievable video database; the positioning module is used for acquiring the current position, the running direction, the speed and the target section information of the train in real time based on the GPS/Beidou system, the track electronic map and the train control system; the scheduling matching module is respectively in communication connection with the data acquisition module and the positioning module, and is used for automatically identifying a plurality of key sections in front of the train in the travelling direction according to real-time coordinates of the train, calling corresponding video resources from the video database and pushing the video resources to a cockpit display end according to the priority sequence of the time sequence or the space distance; the transmission synchronization module is electrically connected with the scheduling matching module and is used for ensuring low time delay and high stability of the video stream under the condition of high-speed train operation, and the transmission synchronization module is also used for determining the alignment of the video signal and the train position signal based on a bandwidth self-adaption mechanism and a synchronization control algorithm; And the interaction module is used for visually presenting the pushed video content on a display screen in the cockpit and supporting the interaction operation of a driver.
2. 2. The real-time positioning based train driving synchronization system of claim 1, wherein the data acquisition module comprises a plurality of high definition cameras and sensor devices deployed along the railway and a database, wherein, The high-definition cameras are configured in key sections along the railway, and are configured to capture real-time pictures and generate high-definition video streams; The sensor device is configured for monitoring environmental changes along the railway, wherein the sensor device comprises a weather sensor, a vibration sensor and an infrared sensor; The system comprises a database, a storage device and a storage device, wherein the database is arranged in a ground server and is configured with a distributed storage architecture and is configured to store acquired video streams and environment data in a wired or wireless mode.
3. 3. The real-time positioning based train driving synchronization system of claim 2, wherein the positioning module comprises a GPS/Beidou positioning unit, a track electronic map unit and a train control unit, wherein, The GPS/Beidou positioning unit is configured to determine geographic coordinates of the train based on the received satellite signals; The electronic map unit of the orbit, dispose the coordinate information of the railway line, wherein, the coordinate information includes line curvature, slope, section division and key point marking; The train control unit is respectively and electrically connected with the GPS/Beidou positioning unit and the track electronic map unit, and is configured to acquire the speed, the direction and the target section information of the train based on the train control system and transmit the speed, the direction and the target section information of the train to the dispatching matching module based on the data bus.
4. 4. The real-time positioning based train driving synchronization system according to claim 3, wherein the schedule matching module comprises a video retrieval unit, a priority ranking unit and a push control unit; the video retrieval unit is respectively and electrically connected with the database and the train control unit and is configured to retrieve video resources of the corresponding section from the video database according to the real-time position information of the train; The priority ranking unit is electrically connected with the video retrieval unit and is configured to prioritize the retrieved video resources based on a time sequence or a spatial distance algorithm; the pushing control unit is electrically connected with the priority ranking unit and is configured to sequentially push video resources to the cockpit display end according to the ranking result.
5. 5. The real-time positioning based train driving synchronization system according to claim 4, wherein the prioritizing unit prioritizes the retrieved video resources based on a time series or a spatial distance algorithm, comprising: The priority ordering unit is further configured to acquire real-time operation data of the train and corresponding section information, wherein the real-time operation data comprises current position coordinates, running direction and speed of the train, and the section information comprises space coordinates of sections corresponding to all video resources; The priority ranking unit is further configured to determine a spatial distance value from the current position of the train to each section according to the current position coordinates of the train and the spatial coordinates of each section; The prioritization unit is further configured to determine an estimated time for the train to reach each section based on the spatial distance value and the real-time speed of the train; the prioritization unit is further configured to prioritize the video resources of each segment from small to large according to the expected arrival time based on a time series algorithm; the priority ranking unit is further configured to rank the video resources of each section from near to far according to the spatial distance based on the spatial distance algorithm; The prioritization unit is further configured to compare the prioritization determined by the time-series algorithm with the prioritization determined by the spatial distance algorithm, wherein: If the priority ordering determined by the time sequence algorithm is consistent with the priority ordering determined by the spatial distance algorithm, the priority ordering unit generates a priority video list for each section of video resources according to the priority ordering determined by the spatial distance algorithm; if the priority order determined by the time sequence algorithm is inconsistent with the priority order determined by the spatial distance algorithm, the priority order unit generates a priority video list for each section of video resources according to the priority order determined by the time sequence algorithm.
6. 6. The real-time positioning based train driving synchronization system of claim 5, wherein the transmission synchronization module comprises a bandwidth adaptation unit, a synchronization control unit, and a network communication unit, wherein, The bandwidth self-adapting unit is configured to dynamically adjust the transmission code rate of the video stream according to the current network condition; a synchronization control unit configured as a time stamp marking and a position verification algorithm to ensure accurate alignment of the video signal and the train position signal; And the network communication unit is configured to be in communication connection with the ground server and the interaction module based on a private network or a public network.
7. 7. The real-time positioning based train driving synchronization system according to claim 6, wherein the bandwidth adaptation unit dynamically adjusts a transmission rate of the video stream according to a current network condition, comprising: the bandwidth adaptation unit is further configured to obtain real-time communication network parameters including bandwidth utilization, transmission delay, packet loss rate and signal-to-noise ratio; the bandwidth adaptive unit is further configured to determine a current average available bandwidth based on the sliding time window and predict short-time bandwidth fluctuations according to the bandwidth variation trend; The bandwidth adaptation unit is further configured to compare the predicted available bandwidth with a transmission rate requirement of the target video stream, determining an adjustment mode, wherein: If the predicted available bandwidth is greater than or equal to the transmission code rate requirement of the target video stream, the bandwidth self-adaptive unit determines to reduce the video transmission code rate; if the predicted available bandwidth is smaller than the transmission code rate requirement of the target video stream and the network delay is smaller than a preset threshold value, the bandwidth self-adaptive unit determines to increase the video transmission code rate; the bandwidth adaptation unit is further configured to output the adjusted transmission code rate parameter to the push control unit.
8. 8. The real-time positioning based train driving synchronization system of claim 7, wherein the interactive module comprises a display screen, a touch panel, and a voice interactive unit, wherein, The display screen is configured in the sight range of a driver in the cockpit and is configured to display the pushed video content; A touch panel configured on a surface of the display screen, the touch panel configured to switch a video screen, pause playing, or playback a history screen based on a touch operation; and a voice interaction unit configured to realize voice interaction of the driver with the touch panel based on the microphone and the speaker.
9. 9. The real-time positioning based train driving synchronization system of claim 1, further comprising: The network security module is arranged between the data acquisition module and the ground server, between the ground server and the transmission synchronization module and between the transmission synchronization module and the interaction module, The network security module includes an encryption unit that encrypts the transmitted data, an identity authentication unit that verifies the identity of the communication based on the digital certificate and the key, and a firewall unit that filters the illegal access request.
10. 10. A real-time positioning-based train driving synchronization method, which is applicable to the real-time positioning-based train driving synchronization system as claimed in any one of claims 1 to 9, and is characterized by comprising: acquiring high-definition video resources of key sections along a railway, and establishing a retrievable video database; Acquiring current position, running direction, speed and target section information of a train in real time based on a GPS/Beidou system, a track electronic map and a train control system; According to the real-time coordinates of the train, automatically identifying a plurality of key sections in front of the running direction of the train, and calling corresponding video resources from a video database; pushing video resources to a cockpit display end according to the priority order of the time sequence or the space distance; ensuring accurate alignment of the video signal and the train position signal based on a bandwidth self-adaptive mechanism and a synchronous control algorithm; and visually presenting the pushed video content on a display screen in the cockpit, and supporting the interactive operation of a driver.

Description

Train driving synchronization system and method based on real-time positioning Technical Field The invention relates to the technical field of train driving assistance, in particular to a train driving synchronization system and method based on real-time positioning. Background In the existing railway train driving system, a train driver mainly performs driving judgment by means of naked eye observation and a signal display in a front visible range. However, under high-speed running or complex line environments (such as curves, tunnel openings, bridges, intersections and the like), the sight distance of a driver is limited by factors such as terrain shielding, meteorological conditions, line curvature and the like, and complete information of a front line and the environment is difficult to acquire in time, so that hysteresis exists in sensing and reacting to emergency. Particularly in the scenes of high-speed railways or inter-city railways, the running speed of the train is high, once obstacles, foreign matters or equipment abnormality occur in front, a driver often cannot finish accurate judgment and effective braking in a limited sight distance, and high safety risks exist. Although the existing train monitoring system can provide line monitoring video or zone environment information, the information is generally managed in a centralized way by a ground monitoring center, real-time linkage is not realized with the running state of the train, a driver cannot directly acquire a front video picture matched with the running position of the driver in a cockpit, and dynamic, continuous and targeted visual assistance is lacked. In addition, the traditional video monitoring transmission mode has the problems of higher delay, poor synchronism, low resource calling efficiency and the like, and is difficult to meet the requirements of low delay and high stability under the operation of a high-speed train, and real-time scheduling and preferential pushing of the video of the key section cannot be realized. Therefore, a driving synchronization system capable of combining real-time positioning information of a train with a video monitoring resource along a line is needed, so that a cockpit can dynamically present a line environment in a beyond-sight distance range in front of the train, and accurate matching of a train running state and a video picture is realized, thereby improving the environment perception capability and driving safety of a driver. Disclosure of Invention In view of the above, the invention provides a train driving synchronization system and method based on real-time positioning, which aims to solve the problems that in the prior art, the existing train monitoring system cannot realize real-time linkage of a train running state and a line monitoring video, so that a driver cannot acquire front video information synchronized with a train position in a cockpit, and the existing video transmission has high delay, low synchronism and low resource scheduling efficiency. The invention provides a train driving synchronization system based on real-time positioning, which comprises: the data acquisition module is used for acquiring high-definition video resources of key sections along the railway and establishing a retrievable video database; the positioning module is used for acquiring the current position, the running direction, the speed and the target section information of the train in real time based on the GPS/Beidou system, the track electronic map and the train control system; the scheduling matching module is respectively in communication connection with the data acquisition module and the positioning module, and is used for automatically identifying a plurality of key sections in front of the train in the travelling direction according to real-time coordinates of the train, calling corresponding video resources from the video database and pushing the video resources to a cockpit display end according to the priority sequence of the time sequence or the space distance; the transmission synchronization module is electrically connected with the scheduling matching module and is used for ensuring low time delay and high stability of the video stream under the condition of high-speed train operation, and the transmission synchronization module is also used for determining the alignment of the video signal and the train position signal based on a bandwidth self-adaption mechanism and a synchronization control algorithm; And the interaction module is used for visually presenting the pushed video content on a display screen in the cockpit and supporting the interaction operation of a driver. Further, the data acquisition module comprises a plurality of high-definition cameras and sensor devices and a database which are arranged along the railway, wherein, The high-definition cameras are configured in key sections along the railway, and are configured to capture real-time pictures and generate high-defin