A fixed block train protection method and system with non-continuous wireless communication

Abstract

The present invention discloses a fixed block train protection method and system of non-continuous wireless communication, wherein the entire line has spaced vehicle-ground wireless communication coverage areas and wireless communication interruption areas; in the vehicle-ground wireless communication coverage areas, the onboard controller cooperates with the ground controller to realize the occupancy and clearance inspection of the train block partition; the system realizes train safety protection in a fixed block manner; in the vehicle-ground wireless communication coverage areas, the onboard controller obtains the movement authorization to enter the block partition from the ground controller; in the wireless communication interruption area, the onboard controller maintains the validity of the movement authorization according to the interlocking route locking rules based on the movement authorization before the train leaves the vehicle-ground wireless communication coverage area until it enters the vehicle-ground wireless communication coverage area. The present invention deploys vehicle-ground wireless communication devices only in specific areas, and realizes train safety protection in a fixed block manner by using vehicle-ground two-way communication, which has high safety and low implementation cost.

Description

Technical Field

[0001] The present invention relates to the field of rail transit technology, and in particular to train protection technology. Background Art

[0002] The current standard communication-based train control system CBTC system for urban rail transit generally adopts train safety protection based on wireless communication continuously deployed throughout the line, interlocking protection based on secondary train occupancy detection equipment such as axle counters / track circuits, and train safety protection based on point degradation of point transponder systems. Whether it is continuous wireless coverage of the entire line, axle counters / track circuits or point transponders, the train safety protection system is a high-cost train protection system. The currently known communication-based train protection that does not rely on axle counters / track circuits and point transponders also relies on continuous wireless communication throughout the entire line. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a fixed block train protection method and system with non-continuous wireless communication, which realizes train safety protection without relying on continuous wireless communication of the entire line.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A fixed block train protection system with discontinuous wireless communication, comprising a wireless communication device for realizing train-ground wireless communication, a train-mounted controller arranged on the train, and a ground controller arranged on the ground, wherein the wireless communication device is arranged at intervals along the extension direction of the line, and the entire line has interval-arranged train-ground wireless communication coverage areas and wireless communication interruption areas between the train-ground wireless communication coverage areas;

[0006] In the area covered by the train-ground wireless communication, the onboard controller cooperates with the ground controller to realize the occupancy and clearance inspection of the train block section;

[0007] The system uses fixed blocking mode to achieve train safety protection;

[0008] In the vehicle-ground wireless communication coverage area, the vehicle controller obtains the movement authorization to enter the blocked area from the ground controller;

[0009] In the wireless communication interruption area, the on-board controller maintains the validity of the movement authorization based on the interlocking route locking rules before the train leaves the vehicle-ground wireless communication coverage area until it enters the vehicle-ground wireless communication coverage area.

[0010] Preferably, the vehicle-ground wireless communication coverage area is set at the block section boundary, the switch area, and the entrance and exit section.

[0011] Preferably, the wireless communication area of ​​the wireless communication device arranged corresponding to the block section boundary covers both sides of the block section boundary, and the coverage area on both sides of the block section boundary includes at least a vehicle length distance, which is used to determine whether the train has completely exited the old block section and entered the new block section.

[0012] Preferably, the wireless communication area of ​​the wireless communication device arranged in the corresponding turnout area extends at least one vehicle length on both sides of the turnout area, which is used to determine whether the train has completely exited the turnout section and entered a new block section.

[0013] Preferably, the wireless communication area of ​​the wireless communication device arranged corresponding to the entry and exit area has an overlapping part with the axle counter / track circuit coverage area, and the overlapping part includes at least two blocked partitions.

[0014] Preferably, the ground controller is provided with a train tracking and block section occupancy management functional unit and an interlocking functional unit.

[0015] Preferably, the onboard controller reports the train position in real time in the area covered by the train-ground wireless communication; the ground controller detects the occupancy of the block section according to the real-time train position and the recorded train tracking sequence, and the method is as follows:

[0016] a) For non-branched areas, when calculating the block section occupancy, no assumption is made on the upper limit of the number of trains entering. When a train is detected entering through the block section boundary, the train information is added to the block section occupied train table in order, and only when the train is detected to have completely left the block section in order at the block section boundary, the train is removed from the block section occupied trains. Only when the block section occupied train list is empty, the block section is judged to be idle, otherwise the block section is judged to be occupied;

[0017] b) The turnout area adopts continuous tracking mode. When any part of the train enters the turnout block section, it is judged that the turnout section is in the occupied state. The turnout is in the occupied and locked state, and the turnout operation will no longer be allowed. When the train completely leaves the turnout section, the turnout occupied and locked state is cancelled;

[0018] c) The overlapping area of ​​the axle counter / track circuit coverage area and the train-to-ground wireless communication coverage area includes at least two block sections. The train completes train positioning in the first boundary section and establishes communication with the ground equipment to distinguish between normal and abnormal incoming trains; when the axle counter / track circuit of the second section indicates that the block section is occupied and there is no train position report occupying the block section, it is necessary to determine that the adjacent wireless communication block section is occupied, and the occupied state needs to be cleared by manual confirmation.

[0019] The present invention also provides a method for protecting a fixed block train with non-continuous wireless communication, which uses the fixed block train protection system with non-continuous wireless communication for protection, and comprises the following steps:

[0020] S1: In the vehicle-ground wireless communication coverage area, the vehicle controller sends a position report to the ground controller in real time, and the ground controller completes the occupancy detection of the blocked partition;

[0021] S2: Before the train is allowed to enter the next block section, it sends an approach request to the ground controller. After the ground controller receives the approach request, the interlocking function unit completes the approach and block section locking; during the block section locking check, if the block section is in an occupied state, the train is prohibited from entering;

[0022] S3: After the onboard controller obtains the route opening status, it calculates the movement authorization based on the train position and the line status and turnout status ahead, and completes the train safety protection according to the movement authorization;

[0023] S4: When the train leaves the coverage area of ​​the train-ground wireless communication, the validity of the movement authorization is maintained according to the interlocking route locking rules;

[0024] S5: When the train completely leaves the block section, the ground controller determines that the block section is cleared and the interlocking function unit unlocks the block section.

[0025] The technical solution adopted by the present invention is to deploy train-ground wireless communication devices in specific areas such as the block section boundary, turnout area, and entry and exit sections, and use two-way communication between the train and the ground to achieve train safety protection in a fixed block manner. Since the whole process of train safety protection can be achieved by achieving train-ground wireless communication coverage in specific areas, the implementation cost is low; and train safety protection is achieved with only two sets of equipment on the train and the ground, with fewer equipment nodes and high system availability.

[0026] The specific technical solutions and beneficial effects of the present invention will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments:

[0028] Figure 1 is a schematic diagram of the deployment of wireless communication devices;

[0029] Figure 2 It is a schematic diagram of the fixed block train protection system of non-continuous wireless communication of the present invention. DETAILED DESCRIPTION

[0030] The technical solutions of the embodiments of the present invention are explained and described below, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work all belong to the protection scope of the present invention.

[0031] The present invention proposes a fixed block train protection method and system based on non-continuous wireless communication, which only needs to deploy wireless communication in key areas such as block section boundaries, turnout areas, and entry and exit sections, and use two-way communication between trains and ground to achieve train safety protection in a fixed block mode. There is no need to deploy axle counters and track circuits, and there is no need to deploy signal machines in non-turnout areas, and train safety protection is fully achieved using on-board equipment.

[0032] Combined with the characteristics of the present invention, the present invention is mainly applied to lines with medium and low transport volumes and low operating intervals.

[0033] refer to Figure 1 and Figure 2 As shown, a fixed block train protection system with discontinuous wireless communication includes a wireless communication device for realizing wireless communication between train and ground, a train-mounted controller arranged on the train, and a ground controller arranged on the ground, wherein the wireless communication device is arranged at intervals along the extension direction of the line, and has a wireless communication coverage area for train and ground arranged at intervals and a wireless communication interruption area between the wireless communication coverage areas for train and ground;

[0034] In the area covered by the train-ground wireless communication, the onboard controller cooperates with the ground controller to realize the occupancy and clearance inspection of the train block section;

[0035] The system realizes train safety protection in a fixed blocking manner; in the area covered by the train-ground wireless communication, the on-board controller obtains the movement authorization to enter the block section from the ground controller; in the area where the wireless communication is interrupted, the on-board controller maintains the validity of the movement authorization according to the interlocking route locking rules (which belong to the prior art) based on the movement authorization before the train leaves the area covered by the train-ground wireless communication until entering the area covered by the train-ground wireless communication.

[0036] The wireless communication device is arranged at the block section boundary, the turnout area, and the entry and exit section. Of course, it is understandable that the wireless communication device can also be arranged in other non-critical areas.

[0037] It can be understood that the wireless communication area of ​​the wireless communication device arranged at the block section boundary covers both sides of the block section boundary, and the coverage area on both sides of the block section boundary includes at least one vehicle length distance, which is used to determine whether the train has completely exited the old block section and entered the new block section. This arrangement rule is suitable for the scenario of bidirectional operation of trains.

[0038] It is understandable that the wireless communication area of ​​the wireless communication device set up in the corresponding turnout area should completely cover the turnout partition to meet the safety protection needs of the turnout area and the train position tracking needs.

[0039] In addition, at least one vehicle length is extended on both sides of the switch area to determine whether the train has completely exited the switch section and entered a new block section.

[0040] It can be understood that the wireless communication area of ​​the wireless communication device set in the entry and exit area has an overlapping part with the axle counter / track circuit coverage area; the overlapping part includes at least two block partitions, ensuring the continuity of position tracking and realizing detection and protection of abnormal train entry.

[0041] In order to improve system integration and reduce costs, this implementation no longer independently sets up control equipment for train tracking and block section occupancy management. In this implementation, the train tracking and block section occupancy management functional unit and the interlocking functional unit are integrated into the ground controller. Of course, the train tracking and block section occupancy management functional unit can also be independent of the ground controller equipment as an independent equipment module.

[0042] In addition, a method for protecting a fixed block train with non-continuous wireless communication is provided, which uses the fixed block train protection system with non-continuous wireless communication for protection, and includes the following steps:

[0043] S1: In the vehicle-ground wireless communication coverage area, the vehicle controller sends a position report to the ground controller in real time, and the ground controller completes the occupancy detection of the blocked partition;

[0044] S2: Before the train is allowed to enter the next block section, it needs to obtain the route opening information from the ground controller. The onboard controller sends a route request to the ground controller. After the ground controller receives the route request, the interlocking function unit completes the route and block section locking;

[0045] S3: After the onboard controller obtains the route opening status, it calculates the movement authorization based on its own train position and the status of the line ahead, and completes the train safety protection according to the movement authorization;

[0046] S4: When the train leaves the coverage area of ​​the train-ground wireless communication, the validity of the movement authorization is maintained according to the interlocking route locking rules;

[0047] S5: When the train completely leaves the block section, the ground controller determines that the block section is cleared and the interlocking function unit unlocks the block section.

[0048] Among them, steps S1, S2, S3, and S5 can all be processed with reference to the existing technology with wireless communication coverage. For the area where wireless communication is interrupted, step S4 can maintain the validity of the mobile authorization based on the existing interlocking route locking rules, that is, the train safety protection can be achieved by fixed blocking.

[0049] After unlocking, the free block sections can be used for new route locking. Especially in the turnout area, the block sections can be divided according to the turnouts, which can realize segmented unlocking and improve the utilization efficiency of the turnout area.

[0050] The block section occupancy detection is completed by the on-board controller and the ground controller; the on-board controller reports the train position in real time in the area covered by the train-ground wireless communication; the ground controller detects the occupancy of the block section based on the real-time train position and the recorded train tracking sequence.

[0051] In different types of wireless coverage areas, the detection principle is as follows:

[0052] a) In the non-branch area, the train sequence entering and leaving the block section is maintained by setting up the train-to-ground wireless communication area on both sides of the block section. From a fixed principle, only one train is allowed to occupy a block section. However, when calculating the block section occupancy, no assumption is made on the upper limit of the number of entering trains. When a train is detected entering through the block section boundary, the train information is added to the block section occupied train table in sequence. And only when the train is detected in the block section to completely exit the block section in order, the train is removed from the block section occupied trains. Only when the block section occupied train list is empty, the block section is judged to be idle, otherwise the block section is judged to be occupied.

[0053] b) The switch area adopts continuous tracking mode. When any part of the train enters the switch block section, it is judged that the switch section is occupied and the switch is in the occupied and locked state, and no operation on the switch is allowed. When the train completely leaves the switch section, the switch occupied and locked state is cancelled.

[0054] c) The overlapping area of ​​the axle counter / track circuit coverage area and the wireless coverage area includes at least two block sections. The train needs to complete the train positioning in the first boundary section and establish communication with the ground equipment. This is to distinguish between normal and abnormal trains. When the axle counter / track circuit of the second section indicates that the block section is occupied, and there is no train position report occupying the block section, it is necessary to determine that the adjacent wireless communication block section is in an occupied state. And this abnormal occupied state needs to be cleared by manual confirmation.

[0055] d) The safety protection of the train is completed by the collaboration of the on-board subsystem and the ground subsystem.

[0056] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes but is not limited to the contents described in the above specific embodiments. Any modification that does not deviate from the functional and structural principles of the present invention will be included in the scope of the claims.

Claims

1. A fixed block train protection system with non-continuous wireless communication, characterized in that: It includes a wireless communication device for realizing vehicle-ground wireless communication, a vehicle-mounted controller arranged on the train, and a ground controller arranged on the ground, wherein the wireless communication devices are arranged at intervals along the extension direction of the line, and the entire line has vehicle-ground wireless communication coverage areas arranged at intervals and wireless communication interruption areas between the vehicle-ground wireless communication coverage areas; In the area covered by the train-ground wireless communication, the onboard controller cooperates with the ground controller to realize the occupancy and clearance inspection of the train block section; The system uses fixed blocking mode to achieve train safety protection; In the vehicle-ground wireless communication coverage area, the vehicle controller obtains the movement authorization to enter the blocked area from the ground controller; In the wireless communication interruption area, the on-board controller maintains the validity of the movement authorization based on the interlocking route locking rules before the train leaves the vehicle-ground wireless communication coverage area until it enters the vehicle-ground wireless communication coverage area.

2. A fixed block train protection system with non-continuous wireless communication according to claim 1, characterized in that: The vehicle-ground wireless communication coverage area is set at the block section boundary, the switch area, and the entrance and exit section.

3. A fixed block train protection system with non-continuous wireless communication according to claim 2, characterized in that: The wireless communication area of ​​the wireless communication device set corresponding to the block section boundary covers both sides of the block section boundary, and the coverage area on both sides of the block section boundary includes at least one vehicle length distance, which is used to determine whether the train has completely exited the old block section and entered the new block section.

4. A fixed block train protection system with non-continuous wireless communication according to claim 2, characterized in that: The wireless communication area of ​​the wireless communication device arranged in the corresponding switch area extends at least one vehicle length on both sides of the switch area, and is used to determine whether the train has completely driven out of the switch section and entered a new block section.

5. The fixed block train protection system with non-continuous wireless communication according to claim 2, characterized in that: The wireless communication area of ​​the wireless communication device arranged in the corresponding entry and exit section area has an overlapping part with the axle counter / track circuit coverage area, and the overlapping part includes at least two blocked partitions.

6. A fixed block train protection system with non-continuous wireless communication according to claim 1, characterized in that: The ground controller is provided with a train tracking and block section occupancy management functional unit and an interlocking functional unit.

7. A fixed block train protection system with non-continuous wireless communication according to any one of claims 1 to 6, characterized in that: The onboard controller reports the train position in real time in the area covered by the train-ground wireless communication. The ground controller detects the occupancy of the block section based on the real-time train position and the recorded train tracking sequence. The method is as follows: a) For non-branched areas, when calculating the block section occupancy, no assumption is made on the upper limit of the number of trains entering. When a train is detected entering through the block section boundary, the information of the train is added to the block section occupied train table in order, and only when the train is detected to have completely left the block section in order at the block section boundary, the train is removed from the block section occupied trains. Only when the block section occupied train list is empty, the block section is judged to be idle, otherwise the block section is judged to be occupied; b) The switch area adopts a continuous tracking method. When any part of the train enters the switch block section, the switch section is judged to be in an occupied state. The switch is in an occupied and locked state, and no operation on the switch is allowed. When the train completely leaves the switch section, the switch occupied and locked state is cancelled; c) The overlapping area of ​​the axle counter / track circuit coverage area and the train-ground wireless communication coverage area includes at least two block sections. The train completes the train positioning in the first boundary section and establishes communication with the ground equipment to distinguish between normal and abnormal entering trains; When the axle counter / track circuit of the second section indicates that the block section is occupied and there is no train position report occupying the block section, it is necessary to determine that the block section of the adjacent wireless communication is occupied, and the occupied state needs to be cleared by manual confirmation.

8. A fixed block train protection method with non-continuous wireless communication, characterized in that: The fixed block train protection system with non-continuous wireless communication as claimed in any one of claims 1 to 7 is used for protection, comprising the following steps: S1: In the vehicle-ground wireless communication coverage area, the vehicle controller sends a position report to the ground controller in real time, and the ground controller completes the occupancy detection of the blocked partition; S2: Before the train is allowed to enter the next block section, it sends an approach request to the ground controller. After the ground controller receives the approach request, the interlocking function unit completes the approach and block section locking; during the block section locking check, if the block section is in an occupied state, the train is prohibited from entering; S3: After the onboard controller obtains the route opening status, it calculates the movement authorization based on the train position and the line status and turnout status ahead, and completes the train safety protection according to the movement authorization; S4: When the train leaves the coverage area of ​​the train-ground wireless communication, the validity of the movement authorization is maintained according to the interlocking route locking rules; S5: When the train completely leaves the block section, the ground controller determines that the block section is cleared and the interlocking function unit unlocks the block section.

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