Train active protection method, equipment and medium based on backup positioning system

Abstract

The present invention relates to a method, device, and medium for active train protection based on a backup positioning system. The method comprises: step S1, when only the backup positioning system is available after the train is downgraded, the trackside train controller obtains positioning information from the backup positioning system and filters out the trackside beacon IDs involved in the train's possible location based on the positioning information; step S2, after the train moves, the backup positioning system sends the read trackside beacon IDs to the trackside train controller, and the trackside train controller compares the received trackside beacon IDs with the trackside beacon IDs filtered out in step S1. If the received trackside beacon ID is not among the filtered trackside beacon IDs, it is determined that the train has an unexpected crossing and step S3 is executed; otherwise, step S2 is continued; in step S3, the trackside train controller triggers active protection against unexpected crossings. Compared with the prior art, the present invention has advantages such as improved detection granularity.

Description

Technical Field

[0001] The present invention relates to a rail transit signal system, and in particular to a train active protection method, equipment and medium based on a backup positioning system. Background Art

[0002] In the existing TACS system structure, the controllers are mainly divided into the onboard controller (CC) and the wayside controller (WTC). The onboard controller is installed on the train. Based on the received tasks, combined with the continuous positioning information obtained in real time and the vehicle input information, it provides safety protection for the train's online operation and also realizes the function of automatic driving. The wayside controller (WTC) is a backup redundant train controller. In the event of the onboard controller CC's position information loss or equipment failure, it replaces the onboard controller CC to control the train.

[0003] If the onboard continuous positioning system or the continuous positioning device fails, the train's safe positioning will switch from continuous positioning to discontinuous positioning using a backup positioning system. Existing solutions for discontinuous positioning often employ passive protection, protecting the area occupied by discontinuous positioning to prevent other trains from entering. However, the scenario in which a train with discontinuous positioning mistakenly leaves the protected area is addressed only through restrictions, without considering active train protection.

[0004] A search of Chinese Patent Publication No. CN117565944A reveals a method, device, and medium for detecting intrusions into a TACS system signal protection zone. This method uses axle counting magnetic heads installed at the boundary of the TACS signal protection zone to detect unauthorized trains illegally entering the zone, thereby providing security protection for the area surrounding the zone. This existing patent utilizes a small number of axle counting devices at the boundary of the TACS system signal protection zone to rapidly detect unauthorized trains. However, the axle counting method employed in this existing patent suffers from limited granularity and high implementation costs. Summary of the Invention

[0005] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and provide a train active protection method, equipment and medium based on a backup positioning system.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] According to a first aspect of the present invention, a train active protection method based on a backup positioning system is provided, the method comprising:

[0008] Step S1: When only the backup positioning system is available after the train is downgraded, the trackside train controller obtains positioning information from the backup positioning system and selects the trackside beacon IDs involved in the train's possible location based on the positioning information;

[0009] Step S2: After the train moves, the backup positioning system sends the read trackside beacon ID to the trackside train controller. The trackside train controller compares the received trackside beacon ID with the trackside beacon ID filtered out in step S1. If the received trackside beacon ID is not among the filtered trackside beacon IDs, it is determined that the train has unexpectedly crossed and step S3 is executed. Otherwise, step S2 is continued.

[0010] Step S3: the trackside train controller triggers active protection against unexpected crossings.

[0011] As a preferred technical solution, the backup positioning system updates the train positioning according to the read trackside beacon information, and sends the acquired positioning to the trackside train controller.

[0012] As a preferred technical solution, the trackside train controller realizes train safety protection when both the main and backup onboard controllers are unavailable.

[0013] As a preferred technical solution, in step S1, a protective buffer area is provided outside the possible location of the train.

[0014] As a preferred technical solution, in step S2, the trackside beacons other than the train position marked by the trackside train controller are defined as crossing trigger beacons.

[0015] As a preferred technical solution, in step S2, if the trackside train controller receives information about the crossing trigger beacon through the backup positioning system, it determines that the train has made an unexpected crossing, that is, the train has not moved according to the dispatching instructions.

[0016] As a preferred technical solution, when the trackside train controller learns that the train has not moved according to the dispatching instructions, it sends the crossing blockade information to the trackside resource manager, and the trackside resource manager blocks the affected area.

[0017] As a preferred technical solution, the trackside train controller sends the unexpected crossing information to the dispatching center. After the dispatching center confirms the unexpected crossing information, it converts the affected area from a blocked state to a train movement allowed state.

[0018] As a preferred technical solution, the trackside train controller maintains an overestimation of the train position, and all beacons are considered to be crossing trigger beacons.

[0019] As an optimal technical solution, after the dispatching center sets the dispatching task, the beacon within the dispatching task range is switched to a non-crossing trigger beacon. The train moves according to the dispatching task. After the train moves, the backup positioning system reads the beacon. The trackside train controller reconfirms the train position and converts the original over-estimated train position into the reconfirmed train position.

[0020] According to a second aspect of the present invention, an electronic device is provided, comprising a memory and a processor, wherein a computer program is stored in the memory, and the processor implements the method when executing the program.

[0021] According to a third aspect of the present invention, a computer-readable storage medium is provided, on which a computer program is stored, and when the program is executed by a processor, the method described above is implemented.

[0022] Compared with the prior art, the present invention has the following advantages:

[0023] 1) The present invention uses the filtered beacon ID to make judgments, which improves the granularity of detection compared to axle counting detection;

[0024] 2) After the trackside train controller WTC of the present invention obtains the train location through the backup positioning system BLS, it can achieve the same unexpected protection as the on-board controller;

[0025] 3) The present invention implements a new crossing protection method that is different from the existing axle counting detection method by adding a cross-travel protection method based on the backup positioning system (BLS).

[0026] 4) While realizing active protection, the present invention also further avoids dangerous scenarios such as squeeze and collision that may be caused when trains exceed the authorized range by adding a protection buffer zone. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 Schematic diagram of the overall architecture of the TACS system according to an embodiment of the present invention;

[0028] Figure 2 A schematic diagram of selecting a crossing trigger beacon based on a train position according to an embodiment of the present invention;

[0029] Figure 3 This is a schematic diagram of protection triggered by unexpected train movement according to an embodiment of the present invention;

[0030] Figure 4 A schematic diagram of scheduling and confirming a protection alarm according to an embodiment of the present invention;

[0031] Figure 5 This is a schematic diagram of an embodiment of the present invention in which a train moves according to a dispatching instruction and reconfirms its position;

[0032] Figure 6 Flowchart of the method of the present invention. DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0034] like Figure 1 As shown in the figure, the TACS system of the present invention mainly includes a primary onboard controller (NCC), a backup onboard controller (BCC), a trackside train controller (WTC), a trackside resource manager (WRC), and a backup positioning system (BLS). The backup positioning system (BLS) is responsible for updating the train's location based on trackside beacon information and transmitting the acquired location to the trackside train manager. The trackside train controller (WTC) is responsible for ensuring train safety when both the primary and backup onboard controllers are unavailable. The trackside resource manager (WRC) is responsible for resource management based on requests from different controllers.

[0035] like Figure 6 As shown, the present invention is based on the active train protection method of the backup positioning system, the method comprising:

[0036] Step S1: When only the backup positioning system is available after the train is downgraded, the trackside train controller obtains positioning information from the backup positioning system and selects the trackside beacon IDs involved in the train's possible location based on the positioning information;

[0037] Step S2: After the train moves, the backup positioning system sends the read trackside beacon ID to the trackside train controller. The trackside train controller compares the received trackside beacon ID with the trackside beacon ID filtered out in step S1. If the received trackside beacon ID is not among the filtered trackside beacon IDs, it is determined that the train has unexpectedly crossed and step S3 is executed. Otherwise, step S2 is continued.

[0038] In step S3, the trackside train controller triggers active protection against unexpected crossings, with the protection range being consistent with that of the onboard controller.

[0039] like Figure 2As shown, the Wayside Train Controller (WTC) selects crossing trigger beacons based on the train's location, such as the red beacon shown in the figure. If the Wayside Train Controller (WTC) obtains information from such beacons through the Backup Positioning System (BLS), it will determine that the train has not moved according to the dispatch instructions. The green portion in the figure represents the train's position confirmed by the system based on information provided by the BLS. The yellow portion represents the protective buffer zone. This buffer zone indicates that if a train mistakenly crosses the green portion and reads the red beacon, the system can still ensure that other trains do not enter the buffer zone, reducing the impact of driver error. Once the train is confirmed to have stopped, the yellow buffer zone is reduced to improve availability.

[0040] like Figure 3 As shown, the train did not move according to the dispatching instructions. The trackside train controller WTC obtained the beacon through the backup positioning system BLS and learned that the train had an unexpected movement. The trackside train controller WTC sent the crossing blockade information to the trackside resource manager WRC. The trackside resource manager WRC blocked the affected area and prohibited other trains from entering the blocked area.

[0041] like Figure 4 As shown, the dispatcher confirms the unexpected crossing information, and the affected area transitions from a blocked state to a state where train movement is permitted. Because the train has issued an unexpected movement, the wayside train controller (WTC) overestimates the train's position, assuming it has crossed the affected area. Simultaneously, all beacons are considered crossing trigger beacons.

[0042] like Figure 5 As shown in the figure, the dispatcher sets the task, and the beacons within the task range are switched to non-crossing trigger beacons. The train moves according to the dispatch task, and the backup positioning system (BLS) reads the beacon after the train moves. The trackside train controller WTC reconfirms the train position and converts the original overestimated train position into a more accurate train position.

[0043] The above is an introduction to the method embodiment. The following further illustrates the solution of the present invention through the embodiments of electronic equipment and storage media.

[0044] An embodiment of the present invention further provides an electronic device including a central processing unit (CPU), which can perform various appropriate actions and processes according to computer program instructions stored in a read-only memory (ROM) or computer program instructions loaded from a storage unit into a random access memory (RAM). In the RAM, various programs and data required for device operation can also be stored. The CPU, ROM, and RAM are connected to each other via a bus. An input / output (I / O) interface is also connected to the bus.

[0045] Many components in a device are connected to the I / O interface, including: input units, such as a keyboard and mouse; output units, such as various types of displays and speakers; storage units, such as magnetic disks and optical disks; and communication units, such as network cards, modems, and wireless communication transceivers. The communication unit allows the device to exchange information / data with other devices via computer networks such as the Internet and / or various telecommunication networks.

[0046] The processing unit performs the various methods and processes described above, such as methods S1 to S3. For example, in some embodiments, methods S1 to S3 may be implemented as a computer software program, which is tangibly contained in a machine-readable medium, such as a storage unit. In some embodiments, part or all of the computer program may be loaded and / or installed on the device via a ROM and / or a communication unit. When the computer program is loaded into the RAM and executed by the CPU, one or more steps of methods S1 to S3 described above may be performed. Alternatively, in other embodiments, the CPU may be configured to execute methods S1 to S3 by any other appropriate means (e.g., by means of firmware).

[0047] The functions described above herein may be performed, at least in part, by one or more hardware logic components. For example, and without limitation, exemplary types of hardware logic components that may be used include: field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chip (SOCs), complex programmable logic devices (CPLDs), and the like.

[0048] The program code for implementing the method of the present invention can be written in any combination of one or more programming languages. Such program code can be provided to a processor or controller of a general-purpose computer, a special-purpose computer, or other programmable data processing device so that when the program code is executed by the processor or controller, the functions / operations specified in the flow chart and / or block diagram are implemented. The program code can be executed entirely on the machine, partially on the machine, as a stand-alone software package, partially on the machine and partially on a remote machine, or entirely on a remote machine or server.

[0049] In the context of the present invention, machine-readable medium can be a tangible medium that can contain or store a program for use with an instruction execution system, device or equipment or used in combination with an instruction execution system, device or equipment. Machine-readable medium can be a machine-readable signal medium or a machine-readable storage medium. Machine-readable medium can include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared or semiconductor systems, devices or equipment, or any suitable combination of the foregoing. More specific examples of machine-readable storage media can include electrical connections based on one or more lines, portable computer disks, hard disks, random access memories (RAM), read-only memories (ROM), erasable programmable read-only memories (EPROM or flash memory), optical fibers, portable compact disk read-only memories (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the foregoing.

[0050] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and such modifications or substitutions are intended to be within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims.

Claims

1. A train active protection method based on a backup positioning system, characterized in that: The method includes: Step S1: When only the backup positioning system is available after the train is downgraded, the trackside train controller obtains positioning information from the backup positioning system and selects the trackside beacon IDs involved in the train's possible location based on the positioning information; Step S2: After the train moves, the backup positioning system sends the read trackside beacon ID to the trackside train controller. The trackside train controller compares the received trackside beacon ID with the trackside beacon ID filtered out in step S1. If the received trackside beacon ID is not among the filtered trackside beacon IDs, it is determined that the train has unexpectedly crossed and step S3 is executed. Otherwise, step S2 is continued. Step S3, the trackside train controller triggers active protection against unexpected crossing; In step S2, the trackside beacon other than the train position marked by the trackside train controller is defined as a crossing trigger beacon; In step S2, if the trackside train controller receives information about the crossing trigger beacon through the backup positioning system, it determines that the train has unexpectedly crossed, that is, the train has not moved according to the dispatching instruction; When the trackside train controller learns that the train has not moved according to the dispatch instruction, it sends the crossing blocking information to the trackside resource manager, and the trackside resource manager blocks the affected area; The trackside train controller sends the unexpected crossing information to the dispatch center, and after the dispatch center confirms the unexpected crossing information, it converts the affected area from a blocked state to a train movement-allowed state; The trackside train controller maintains an overestimate of the train position and all beacons are considered to be crossing trigger beacons; After the dispatching center sets the dispatching task, it switches the beacons within the dispatching task range to non-crossing trigger beacons. The train moves according to the dispatching task. After the train moves, the backup positioning system reads the beacon. The trackside train controller reconfirms the train position and converts the original over-estimated train position into the reconfirmed train position.

2. The active train protection method based on the backup positioning system according to claim 1, characterized in that: The backup positioning system updates the train positioning according to the read trackside beacon information and sends the acquired positioning to the trackside train controller.

3. The active train protection method based on the backup positioning system according to claim 1, characterized in that: The trackside train controller provides train safety protection when both the primary and backup onboard controllers are unavailable.

4. The active train protection method based on a backup positioning system according to claim 1, characterized in that: In step S1, a protective buffer area is provided outside the possible location of the train.

5. An electronic device comprising a memory and a processor, wherein a computer program is stored in the memory, wherein: When the processor executes the program, the method according to any one of claims 1 to 4 is implemented.

6. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the method according to any one of claims 1 to 4 is implemented.

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