EP4001049A1

EP4001049A1 - Level crossing safety protection method and system

Info

Publication number: EP4001049A1
Application number: EP21759003.3A
Authority: EP
Inventors: Youbing Zhang; Zhiqiang Chen; Jianmin Wang; Xiaona YU; Guozhen Zhang; Zhicheng ZHU; Xiaoyan HAO
Original assignee: CRSC Research and Design Institute Group Co Ltd
Current assignee: CRSC Research and Design Institute Group Co Ltd
Priority date: 2020-09-22
Filing date: 2021-06-29
Publication date: 2022-05-25
Also published as: WO2022062525A1; EP4001049A4; CN111923968B; CN111923968A

Abstract

The present invention provides a method and a system for safety protection of a level crossing. The method includes: sending a closing command to the system for protection of a level crossing; determining a protection state of a level crossing according to a closing command execution condition, the protection state including a protected state or an unprotected state; acquiring level crossing information, the level crossing information including a stopping sign and a level crossing limit speed when the protection state is the unprotected state; and making a train stop first and then travel through the level crossing or travel through the level crossing without stopping according to the stopping sign and the level crossing limit speed when the protection state is the unprotected state. The method and the system for a safety protection of a level crossing of the present invention enable closing and reopening of the level crossing through a signal system with a high degree of automation, and enable to control trains to safely travel through the level crossing accordingly according to different states of the level crossing, so as to improve efficiency of travelling through the level crossing of the trains.

Description

FIELD OF TECHNOLOGY

The present invention belongs to the field of rail transit, and particularly relates to a method and a system for safety protection of a level crossing.

BACKGROUND

Safety protection of existing level crossings are carried out by railroaders, by closing the level crossings before trains travel through the level crossings and re-opening the level crossings after trains travel through the level crossings. The attended level crossings are relatively low in efficiency, and further occupy a large quantity of human resources.
Therefore, there is an urgent need of an automatic solution for safety protection of the level crossings.

SUMMARY

Aimed at the problem above, the present invention provides a method for safety protection of a level crossing. The method includes:

sending a closing command to a system for protection of a level crossing;
determining a protection state of the level crossing according to a closing command execution condition, the protection state including a protected state or an unprotected state;
acquiring level crossing information, the level crossing information including a stopping sign and a level crossing limit speed when the protection state is the unprotected state; and
making a train stop first and then travel through the level crossing or travel through the level crossing without stopping according to the stopping sign and the level crossing limit speed when the protection state is the unprotected state.

Further, the stopping sign represents stopping, and making a train stop first and then travel through the level crossing according to the stopping sign and the level crossing limit speed includes:

acquiring information of a level crossing zone and information of a stopping zone before the level crossing;
controlling the train to stop in the stopping zone; and
controlling the train to travel through the level crossing zone at a speed not higher than the level crossing limit speed.

Further, controlling the train to stop in the stopping zone includes:
performing monitoring by taking a start of the level crossing zone as an end of movement authority of the train and controlling a front end of the train to stop in the stopping zone.
Further, controlling the train to travel through the level crossing zone at a speed not higher than the level crossing limit speed includes:
after a front end of the train stops in the stopping zone, taking the front end of the train as a start of a level crossing limit speed zone, and an end of the level crossing zone as an end of the level crossing limit speed zone, incorporating the level crossing limit speed into a most restrictive speed profile, and controlling the train to travel through the level crossing limit speed zone.
Further, the stopping sign represents not stopping, and making a train travel through the level crossing without stopping according to the stopping sign and the level crossing limit speed includes:

acquiring information of a level crossing zone and information of a stopping zone before the level crossing;
controlling a train to decelerate a specified speed to the level crossing limit speed before a start of a level crossing zone; and
controlling the train to travel through the level crossing zone at a speed not higher than the level crossing limit speed.

Further, controlling a train to decelerate a specified speed to the level crossing limit speed before a start of a level crossing zone includes:

performing monitoring by taking the start of the level crossing zone as an end of temporary movement authority; and
controlling the train to decelerate until a full service brake speed of the train is reduced to the level crossing limit speed.

Further, controlling the train to travel through the level crossing zone at a speed not higher than the level crossing limit speed includes:

when that the full service brake speed of the train is reduced to the level crossing limit speed is satisfied, taking a front end of the train as a start of a level crossing limit speed zone, and an end of the level crossing zone as an end of the level crossing limit speed zone, incorporating the level crossing limit speed into a most restrictive speed profile, and controlling the train to travel through the level crossing limit speed zone. Further, the level crossing information further includes:
a level crossing number, the protection state of the level crossing, the information of a level crossing zone and the information of the stopping zone before the level crossing;

Further, when the protection state is the protected state, the train is controlled in speed according to line data provided by a ground device, so as to safely travel through the level crossing.
Further, acquiring level crossing information includes:

continuously receiving, by an on-board device, the level crossing information and updating level crossing information received previously; and
when the protection state is updated to the protected state from the unprotected state, stopping incorporating the level crossing limit speed into the most restrictive speed profile according to the level crossing information, and allowing the train to accelerate to travel.

Further, for a level crossing on which the system for protection of a level crossing is not mounted, a ground device sends to an on-board device level crossing information that the level crossing is in an unprotected state.
The present invention further provides a system for safety protection of a level crossing. The system includes:

a command sending module used for sending a closing command to a system for protection of a level crossing;
a state determination module used for determining a protection state of the level crossing according to a closing command execution condition, the protection state including a protected state or an unprotected state;
an information acquisition module used for acquiring level crossing information, the level crossing information including a stopping sign and a level crossing limit speed when the protection state is the unprotected state; and
a train control module used for making a train stop first and then travel through the level crossing or travel through the level crossing without stopping according to the stopping sign and the level crossing limit speed when the protection state is the unprotected state.

performing monitoring by taking the start of the level crossing zone as an end of temporary movement authority; and
controlling the train to decelerate until the full service brake speed of the train is reduced to the level crossing limit speed.

Further, controlling the train to travel through the level crossing zone at a speed not higher than the level crossing limit speed includes:
when that the full service brake speed of the train is reduced to the level crossing limit speed is satisfied, taking a front end of the train as a start of a level crossing limit speed zone, and an end of the level crossing zone as an end of the level crossing limit speed zone, incorporating the level crossing limit speed into a most restrictive speed profile, and controlling the train to travel through the level crossing limit speed zone.
The method and the system for a safety protection of a level crossing of the present invention have the following advantages:

the system for protection of a level crossing is connected to a ground signal system, through which the level crossing is closed and reopened, and therefore achieves a high degree of automation;
an operating state of the system for protection of a level crossing may be monitored in real time, and level crossing information of different kinds is sent to the train according to the protection state of the level crossing, so as to achieve safety protection of different levels; and

The train may stop firstly and then travel through the level crossing and travel through the level crossing without stopping according to the different states of the level crossing, so as to improve efficiency of travelling through the level crossing of the train.
When the system for protection of a level crossing fails, the on-board device on the train incorporates the level crossing limit speed into the most restrictive speed profile, monitors travelling of the train and tries to improve the travelling efficiency while ensuring safety
Other features and advantages of the present invention will be set forth in the following specification, and will partially become apparent in the specification, or may be learned by implementing the present invention. An objective and other advantages of the present invention may be achieved and obtained through structures indicated in the specification, the claims and accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

To describe the technical solutions in the embodiments of the present invention or in the prior art more clearly, the following briefly describes the accompanying drawings required in descriptions of the embodiments or in the prior art. Apparently, the accompanying drawings in the following descriptions show some embodiments of the present invention, and a person of ordinary skill in the art can still derive other accompanying drawings from these accompanying drawings without creative efforts.

Fig. 1 shows a flowchart of a method for safety protection of a level crossing according to an embodiment of the present invention;
Fig. 2 shows a structural schematic diagram of a system for safety protection of a level crossing according to an embodiment of the present invention;
Fig. 3 shows a schematic diagram of a level crossing zone and a stopping zone according to an embodiment of the present invention; and
Fig. 4 shows another structural schematic diagram of a system for safety protection of a level crossing according to an embodiment of the present invention.

DESCRIPTION OF THE EMBODIMENTS

To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describes the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some rather than all of the embodiments of the present invention. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.
An embodiment of the present invention provides a method for safety protection of a level crossing to achieve automatic safety protection of the level crossing. As shown in Fig. 1, the method includes:

To be exemplary, the method for safety protection of a level crossing described in the embodiment of the present invention may be implemented by a system for safety protection of a level crossing shown in Fig. 2.
As shown in Fig. 2, the system for a safety protection of a level crossing is composed of a ground device, an on-board device, a signal system, etc. Specifically, the system for a safety protection of a level crossing includes a system for protection of a level crossing, computer based interlocking (CBI), a train control center (TCC) and a train on-board system, and further includes the signal system such as radio block center(s) (RBC) and/or track circuit(s), wayside electronic unit(s), balise(s), etc. according to conditions of lines.
The system for protection of a level crossing is used for automatically protecting the level crossing, and may receive a crossing command and perform a crossing protection action, for example, automatically close the crossing according to a closing command, enter a protected state or an unprotected state, and automatically reopen the crossing according to an opening command. The system for protection of a level crossing feeds back a crossing state according to an action result, which is the protection state of the level crossing in this embodiment of the present invention. Specifically, the system for protection of a level crossing is connected to the TCC and reports the crossing state to the TCC, the TCC sends the crossing state to the CBI, and the CBI sends the level crossing state to the RBC.
In the embodiment of the present invention, the closing command is sent to the system for protection of a level crossing according to a position relation between a train and the level crossing, that is, the closing command is sent to the system for protection of a level crossing when the trains travels to a nearby position with a specified distance from the level crossing.
For a line which may use wireless transmission of data, the on-board device on the train sends a position of the train to the RBC wirelessly in real time. The RBC determines a timing for sending a command to the level crossing according to a relation between the position of the train and a position of the crossing before the train, and the RBC sends the level crossing command to the system for protection of a level crossing through the CBI and the TCC in sequence. In another embodiment, the RBC merely sends the position of the train to the CBI, the CBI sends the crossing command to the TCC according to information of the position of the train, or sends the information of the position of the train to the TCC, and the TCC sends the crossing command to the system for protection of a level crossing. The system for protection of a level crossing executes the crossing command, and sends the latest level crossing information and crossing state to the CBI through the TCC, then the CBI sends the same to the RBC, and the RBC sends the level crossing information to the on-board device on the train wirelessly. In the embodiment of the present invention, the level crossing information includes the crossing state, which is the crossing protection state. In another embodiment, corresponding level crossing information and crossing state may be separately sent. If the system for protection of a level crossing successfully executes the command, the crossing state of the level crossing is the protected state, and the level crossing information sent to the on-board device by the RBC includes the protected state of the level crossing. If the system for protection of a level crossing fails to execute the command or the level crossing fails, the protection state in the level crossing information sent to the on-board device by the RBC is the unprotected state.
For a line which may not use wireless transmission of data, the TCC detects the relation between the position of the train and the position of the crossing before the train through the track circuit, etc., and the crossing command is sent to the system for protection of a level crossing when the train arrives at a position with a certain distance before the level crossing. The system for protection of a level crossing executes the crossing command, and sends the latest crossing state to the TCC. The TCC transmits the level crossing information to a ground switchable balise through a wayside electronic unit, and the train receives the level crossing information through an electromagnetic induction manner when passing through the switchable balise. If the system for protection of a level crossing successfully executes the command, the crossing state in the level crossing information sent to the on-board device by the TCC through the switchable balise is the protected state. If the system for protection of a level crossing fails to execute the command or the level crossing fails, the crossing state in the level crossing information sent to the on-board device by the TCC through the switchable balise is the unprotected state.
When the train gets close to the level crossing, the ground device (the RBC or the TCC) sends the closing command of the level crossing to the system for protection of a level crossing, and closes the level crossing for preparing for travelling of the train. After the train completely travels through the level crossing, the ground device (the RBC or the TCC) sends the opening command of the level crossing to the system for protection of a level crossing, and reopens the level crossing.
The following describes a process of safety protection after the system for protection of a level crossing receives the crossing command.
The system for protection of a level crossing executes crossing closing according to the closing command of the crossing command and feeds back the crossing state.
If the system for protection of a level crossing successfully close the level crossing automatically, the protection state of the level crossing is the protected state, and the on-board device does not need to perform extra safety protection for the level crossing, and directly controls a speed of the train according to line data provided by the ground device, so as to make the train safely travel through the level crossing. When the level crossing is in the protected state, the level crossing information does not need to include limit speed information, information of a stopping zone before the level crossing, a stopping sign, etc.
If the system for protection of a level crossing fails to execute the command or the level crossing fails, the feedback protection state of the level crossing is the unprotected state. The ground device feeds back, through the level crossing information, the protection state and other information required by automatic travelling through the level crossing of the train.
In the the embodiment of the present invention, level crossing information of different kinds for the train is provided levelaccording to the protection state of the level crossing, so as to achieve safety protection of different levels.
In the embodiment of the present invention, the level crossing information sent to the on-board device by the ground device includes a level crossing number, information of a level crossing zone, information of the stopping zone before the level crossing, the protection state of the level crossing, the stopping sign and the level crossing limit speed, that is a permitted speed of the level crossing.
The level crossing number is used for marking the level crossing. In an embodiment, the computer based interlocking system may control a plurality of level crossings, the train may travel through the plurality of level crossings and may continuously receive the level crossing information, such that the level crossing number is used for distinguishing the level crossings, and the on-board device updates information of the corresponding level crossing according to the level crossing number. When the on-board device receives new level crossing information, the newly received level crossing number is identical to a previously received level crossing number, the previously received level crossing information is replaced with the newly received level crossing information.
The on-board device is further used for acquiring the information of the level crossing zone and corresponding information of a stopping zone. In the embodiment of the present invention, a start of the level crossing, a length of the level crossing and a length of the stopping zone before the level crossing represent the information of the level crossing zone and the information of the stopping zone. As shown in Fig. 3, an end of the level crossing=the start of the level crossing + the length of the level crossing, an end of the stopping zone=the start of the level crossing, and a start of the stopping zone=the start of the level crossing-the length of the stopping zone. In another embodiment, the start of the level crossing (or the end of the stopping zone), the end of the level crossing and the start of the stopping zone in the level crossing information may represent the information of the level crossing zone and the information of the stopping zone. The embodiment of the present invention does not limit particular parameters of the two zones. Fig. 3 shows a stopping zone and a level crossing zone when a train travels from a direction of a level crossing to the level crossing, which are symmetric to a relation between the stopping zone and the level crossing zone when the train travels to the level crossing from the other direction of the level crossing. A person of ordinary skill in the prior art may obtain a safety protection solution in the other direction based on a safety protection solution in one direction in the embodiment of the present invention.
When receiving the level crossing information in a wireless manner or from the switchable balise, the on-board device does not add extra protection for a protected level crossing, controls the speed of the train according to the line data (including level crossing limit speed information) provided by the ground device and therefore makes the train safely travel through the level crossing.
After receiving the level crossing information, the on-board device uses the level crossing information if the protection state of the level crossing is unprotected. When the level crossing is unprotected, the on-board device incorporates the level crossing limit speed into the most restrictive speed profile, so as to monitor travelling of the train, and the maximum speed of travelling through the level crossing of the train may not exceed the level crossing limit speed. The stopping sign before the level crossing is used for indicating whether the train needs to stop before the train travels through the level crossing, based on which the train may travel through the level crossing without stopping and stop first and then travel through the level crossing.
For the unprotected level crossing, the on-board device needs to determine whether to stop the train before the level crossing according to the stopping sign before the level crossing. If the stopping sign before the level crossing represents stopping, the on-board device controls the train to stop before the level crossing and then travel through the level crossing. If the stopping sign before the level crossing represents not stopping, the on-board device controls the train to decelerate, so as to make the train travel through the level crossing without stopping at a low speed.
When the stopping sign represents stopping, making a train stop first and then travel through the level crossing according to the stopping sign and the level crossing limit speed includes:
acquiring, by the on-board device, information of the level crossing zone and information of a stopping zone before the level crossing; controlling the train to stop in the stopping zone; and then controlling, by the on-board device, the train to travel through the level crossing zone at a speed not higher than the level crossing limit speed.
Specifically, monitoring is performed by taking the start of the level crossing zone, which is the end of the stopping zone, as an end of movement authority of the train and a front end of the train is controlled to stop in the stopping zone. That is, after the train stops, the front end of the train is located in the stopping zone before the level crossing. In the embodiment of the present invention, the front end of the train is specifically an estimated train front end and in another embodiment, the front end of the train may be the max safe front end or the min safe front end. The on-board device no longer takes the start of the level crossing as an end of temporary movement authority for monitoring, but incorporates the level crossing limit speed into the most restrictive speed profile from the estimated train front end. The most restrictive speed profile is a limit speed curve fusing all-kind limit speed information of a line limit speed, a temporary speed restriction, the maximum train travelling speed, etc. by the on-board device, and is formed by taking the minimum limit speed in each zone without loss of generality. The level crossing limit speed zone serves as a special temporary speed restriction zone, a start of the temporary speed restriction zone is the estimated train front end, an end of the limit speed zone is the end of the level crossing zone, and a permitted speed of the temporary speed restriction zone is the level crossing limit speed. The on-board device defines a limit speed, so as to allow a driver to control the train to travel according to the limit speed, and the on-board device performs safety protection on travelling of the train based on the limit speed. If the train stops before the stopping zone rather than in the stopping zone, the on-board device does not incorporate the level crossing limit speed into the most restrictive speed profile. Under the conditions, the train is controlled to continuously travel according to the permitted speed, and stop in the stopping zone, and then the level crossing limit speed is incorporated into the most restrictive speed profile.
If the stopping sign before the level crossing represents is not stopping, the on-board device acquires the information of the level crossing zone and the information of the stopping zone before the level crossing. The on-board device or the driver controls the train to decelerate, when a specified speed of the train at a current position before the start of the level crossing zone reaches the level crossing limit speed, the on-board device incorporates the level crossing limit speed into the most restrictive speed profile from the current position to the level crossing end zone, and the on-board device controls the train to travel through the level crossing zone at a speed not higher than the level crossing limit speed. Various speeds are involved in a process of controlling travelling of the train, for example, a current travelling speed of the train, the full service brake speed, etc. In the embodiment of the present invention, the full service brake speed is selected for determining whether the train reaches a target of a first stage, which is, the specified speed is reduced to the level crossing limit speed before the start of the level crossing zone. The train enters a second stage when the target of the first stage is met, that is, the train travels through the level crossing zone at a speed not higher than the level crossing limit speed. The full service brake speed is taken as a travelling control target of the train in the stopping zone, so as to guarantee the train to be safe and controllable when the train travels through the level crossing, and improve efficiency of travelling through the level crossing of the train.
Particularly, the on-board device takes the start of the level crossing, that is the end of the stopping zone, as the end of temporary movement authority for monitoring, and the on-board device, such as automatic train protection (ATP) or the driver controls the train to decelerate. When the train gradually gets close to the level crossing zone and continuously decelerates, the full service brake speed of the train is gradually reduced as well, when that the full service brake speed of the train is reduced to the level crossing limit speed is satisfied, the on-board device no longer takes the start of the level crossing zone as an end of temporary movement authority for monitoring, but incorporates the level crossing limit speed into the most restrictive speed profile from the front end of the train. In the embodiment of the present invention, the front end of the train is specifically the estimated train front end. At this moment, the level crossing also serves as a special temporary speed restriction zone, a start of the limit speed zone is the estimated train front end, an end of the limit speed zone is the end of the level crossing zone, the permitted speed of the limit speed zone is the level crossing limit speed, the level crossing limit speed is incorporated into the most restrictive speed profile, and the train is controlled to travel through the level crossing limit speed zone.
In the embodiment of the present invention, through the stopping sign and the limit speed information, the train may safely, efficiently and automatically travel through the level crossing with or without stopping. A travelling monitoring point of the train is arranged, and the limit speed is incorporated into the most restrictive speed profile, so as to improve the efficiency of travelling through the level crossing of the train.
After the train travels through a level crossing end, the permitted speed is allowed to no longer be influenced by the level crossing limit speed, but is determined by the most restrictive speed profile, and the train may accelerate to travel.
If the level crossing before the train fails, the ground device sends the level crossing information to the on-board device, and marks the level crossing with the unprotected state. The on-board device needs to abide by the level crossing limit speed and travels through the level crossing at a low speed. The train decelerates first or stops and then travels, or travels at a low speed, and the driver observes manual operation and other protection on the crossing before the train, and controls the train to travel through the level crossing at a relatively low speed. Since the train travels at a very low speed, once the driver observes an accidental condition, the driver may brake the train so as to stop the train timely. If the failed level crossing is recovered before the train travels through the level crossing, the ground device sends level crossing information with identical numbers, and marks the level crossing with the protected state, that is, the protection state is updated to the protected state from the unprotected state. The on-board device receives new level crossing information, old level crossing information is replaced with the new level crossing information. Since the new level crossing information represents the protected state of the level crossing, the on-board device stops incorporating the level crossing limit speed into the most restrictive speed profile, and allows acceleration, and the train may accelerate to travel. In the embodiment of the present invention, the train continuously receives the level crossing information when travelling through the level crossing, the protection state of the level crossing is monitored, such that the efficiency of travelling through the crossing of the train is improved on the premise of guaranteeing the safety.
For a level crossing on which the system for protection of a level crossing is not mounted, the ground device sends to the on-board device on the train level crossing information that the level crossing is in an unprotected state through the RBC or the TCC, and the on-board device incorporates the level crossing limit speed into the most restrictive speed profile for initiatively performing the safety protection.
Based on identical inventive concept, the embodiment of the present invention further provides a system for a safety protection of a level crossing. As shown in Fig. 4, the system include:

In the embodiment of the present invention, the command sending module is the ground device, after receiving a position of the train, the ground device sends a crossing command according to a relation between the position of the train and a position of the level crossing, for example, the ground device sends a closing command to the system for protection of a level crossing when the train gets close to the level crossing. Without loss of generality, the ground device is TCC.
The level crossing executes closing according to the closing command and feeds back, or the ground device collects a closing execution result, and acquires the protection state of the level crossing. The ground device sends the protection state of the level crossing to the train. The train determines the protection state of the level crossing by the state determination module. Specifically, the state determination module is arranged in the on-board device. The train acquires the level crossing information through the train control module in the on-board device. The train control module controls the train to travel through the level crossing according to the protection state and the level crossing information. In the embodiment of the present invention, the command sending module is in data connection with the on-board device, specifically, achieves interaction through a computer based interlocking system, a radio block center (RBC), a balise, etc. The command sending module is connected to the state determination module and the information acquisition module in the on-board device, and the train control module is also connected to the information acquisition module and the state determination module. Further, specifically, the state determination module is connected to the information acquisition module, and determines the protection state through the level crossing information obtained through analysis. In the embodiment of the present invention, the train on-board device controls the train to travel as the train control module, or a driver may control the train to travel through the level crossing according to travelling requirements of the limit speed, etc. through the train control module. The train control module is a device capable of achieving control over the train, and a driving manner is not limited to automatic driving or manual driving.
The level crossing information further includes a level crossing number, the protection state of the level crossing, the information of a level crossing zone and the information of a stopping zone before the level crossing.
When the stopping sign represents stopping, making a train stop first and then travel through the level crossing according to the stopping sign and the level crossing limit speed includes: acquiring, by the on-board device, the information of the level crossing zone and the information of the stopping zone before the level crossing; controlling the train to stop in the stopping zone; and controlling the train to travel through the level crossing zone at a speed not higher than the level crossing limit speed.
Specifically, monitoring is monitored by taking a start of the level crossing zone as an end of movement authority of the train and a front end of the train is controlled to stop in the stopping zone. Then, the front end of the train is taken as a start of a level crossing limit speed zone, and an end of the level crossing zone as an end of the level crossing limit speed zone, the level crossing limit speed is incorporated into a most restrictive speed profile, and the train is controlled to travel through the level crossing limit speed zone.
When the stopping sign represents not stopping, making a train travel through the level crossing without stopping according to the stopping sign and the level crossing limit speed includes: acquiring information of the level crossing zone and information of a stopping zone before the level crossing; controlling the train to decelerate a specified speed to the level crossing limit speed before a start of the level crossing zone; and controlling the train to travel through the level crossing zone at a speed not higher than the level crossing limit speed.
Specifically, a start of the level crossing zone (an end of the stopping zone) is taken as an end of temporary movement authority for monitoring, the train is controlled to decelerate, when the full service brake speed of the train is reduced to the level crossing limit speed before the start of the level crossing zone, a position of a front end of the train is taken as a start of a level crossing limit speed zone, and an end of the level crossing zone is taken as an end of the level crossing limit speed zone. The level crossing limit speed is incorporated into a most restrictive speed profile, and the train is controlled to travel through the level crossing limit speed zone.
When the protection state is the protected state, the train is controlled in speed according to line data provided by the ground device, so as to safely travel through the level crossing.
Further, the state determination module continuously receives the level crossing information and updates level crossing information received previously, and stops incorporating the level crossing limit speed into the most restrictive speed profile when the protection state is updated to the protected state from the unprotected state according to the level crossing information, and allows the train to accelerate to travel.
For a level crossing on which the system for protection of a level crossing is not mounted, the command sending module sends to the state determination module level crossing information that the level crossing is in an unprotected state.
The method and the system for a safety protection of a level crossing of the present invention enable closing and reopening of the level crossing through a signal system with a high degree of automation, and may monitor an operation state of the system for protection of a level crossing in real time, and make the train to travel through the level crossing with or without stopping according to different states of the level crossing, so as to improve efficiency of travelling through the level crossing of the train on the premise of guaranteeing safety. Although the present invention has been described in detail with respect to the embodiments above, it should be appreciated by a person of ordinary skill in art that the technical solutions recorded in the embodiments above may be still modified, or part of its technical features may be replaced with equivalents; and such modifications or substitutions do not deviate the nature of the technical solutions from the spirit and scope of the technical solutions of the various embodiments in the present invention.

Claims

A method for safety protection of a level crossing, characterized by comprising:
sending a closing command to a system for protection of a level crossing;

determining a protection state of a level crossing according to a closing command execution condition, the protection state comprising a protected state or an unprotected state;

acquiring level crossing information, the level crossing information comprising a stopping sign and a level crossing limit speed when the protection state is the unprotected state; and

making a train stop first and then travel through the level crossing or travel through the level crossing without stopping according to the stopping sign and the level crossing limit speed when the protection state is the unprotected state.
The method for safety protection of a level crossing according to claim 1, characterized in that the stopping sign represents stopping, and making a train stop first and then travel through the level crossing according to the stopping sign and the level crossing limit speed comprises:
acquiring information of a level crossing zone and information of a stopping zone before the level crossing;

controlling the train to stop in the stopping zone; and

controlling the train to travel through the level crossing zone at a speed not higher than the level crossing limit speed.
The method for safety protection of a level crossing according to claim 2, characterized in that controlling the train to stop in the stopping zone comprises:
performing monitoring by taking a start of the level crossing zone as an end of movement authority of the train and controlling a front end of the train to stopping in the stopping zone.
The method for safety protection of a level crossing according to claim 2, characterized in that controlling the train to travel through the level crossing zone at a speed not higher than the level crossing limit speed comprises:
after a front end of the train stops in the stopping zone, taking the front end of the train as a start of a level crossing limit speed zone, and an end of the level crossing zone as an end of the level crossing limit speed zone, incorporating the level crossing limit speed into a most restrictive speed profile, and controlling the train to travel through the level crossing limit speed zone.
The method for safety protection of a level crossing according to claim 1, characterized in that the stopping sign represents not stopping, and making a train travel through the level crossing without stopping according to the stopping sign and the level crossing limit speed comprises:
acquiring information of a level crossing zone and information of a stopping zone before the level crossing;

controlling the train to decelerate a specified speed to the level crossing limit speed before a start of a level crossing zone; and

controlling the train to travel through the level crossing zone at a speed not higher than the level crossing limit speed.
The method for safety protection of a level crossing according to claim 5, characterized in that controlling a train to decelerate a specified speed to the level crossing limit speed before a start of a level crossing zone comprises:
performing monitoring by taking the start of the level crossing zone as an end of temporary movement authority; and

controlling the train to decelerate until a full service brake speed of the train is reduced to the level crossing limit speed.
The method for safety protection of a level crossing according to claim 5, characterized in that controlling the train to travel through the level crossing zone at a speed not higher than the level crossing limit speed comprises:
when that a full service brake speed of the train is reduced to the level crossing limit speed is satisfied, taking a front end of the train as a start of a level crossing limit speed zone, and an end of the level crossing zone as an end of the level crossing limit speed zone, incorporating the level crossing limit speed into a most restrictive speed profile, and controlling the train to travel through the level crossing limit speed zone.
The method for safety protection of a level crossing according to any one of claims 1-7, characterized in that the level crossing information further comprises:
a level crossing number, the protection state of the level crossing, the information of the level crossing zone and the information of the stopping zone before the level crossing;
The method for safety protection of a level crossing according to any one of claims 1-7, characterized in that
when the protection state is the protected state, the train is controlled in speed according to line data provided by a ground device, so as to safely travel through the level crossing.
The method for safety protection of a level crossing according to any one of claims 1-7, characterized in that acquiring level crossing information comprises:
continuously receiving, by an on-board device, the level crossing information and updating level crossing information received previously; and

when the protection state is updated to the protected state from the unprotected state, stopping incorporating the level crossing limit speed into a most restrictive speed profile according to the level crossing information, and allowing the train to accelerate to travel.
The method for safety protection of a level crossing according to any one of claims 1-7, characterized in that
for a level crossing on which the system for protection of a level crossing is not mounted, a ground device sends to an on-board device level crossing information that the level crossing is in an unprotected state.
A system for safety protection of a level crossing, characterized by comprising:
a command sending module used for sending a closing command to a system for protection of a level crossing;

a state determination module used for determining a protection state of a level crossing according to a closing command execution condition, the protection state comprising a protected state or an unprotected state;

an information acquisition module used for acquiring level crossing information, the level crossing information comprising a stopping sign and a level crossing limit speed when the protection state is the unprotected state; and

a train control module used for making a train stop first and then travel through the level crossing or travel through the level crossing without stopping according to the stopping sign and the level crossing limit speed when the protection state is the unprotected state.
The system for safety protection of a level crossing according to claim 12, characterized in that the stopping sign represents stopping, and making a train stop first and then travel through the level crossing according to the stopping sign and the level crossing limit speed comprises:
acquiring information of a level crossing zone and information of a stopping zone before the level crossing;

controlling the train to stop in the stopping zone; and

controlling the train to travel through the level crossing zone at a speed not higher than the level crossing limit speed.
The system for safety protection of a level crossing according to claim 13, characterized in that controlling the train to stop in the stopping zone comprises:
performing monitoring by taking a start of the level crossing zone as an end of movement authority of the train and controlling a front end of the train to stop in the stopping zone.
The system for a safety protection of a level crossing according to claim 13, characterized in that controlling the train to travel through the level crossing zone at a speed not higher than the level crossing limit speed comprises:
after a front end of the train stops in the stopping zone, taking the front end of the train as a start of a level crossing limit speed zone, and an end of the level crossing zone as an end of the level crossing limit speed zone, incorporating the level crossing limit speed into a most restrictive speed profile, and controlling the train to travel through the level crossing limit speed zone.
The system for safety protection of a level crossing according to claim 12, characterized in that the stopping sign represents not stopping, and making a train travel through the level crossing without stopping according to the stopping sign and the level crossing limit speed comprises:
acquiring information of a level crossing zone and information of a stopping zone before the level crossing;

controlling a train to decelerate a specified speed to the level crossing limit speed before a start of a level crossing zone; and

controlling the train to travel through the level crossing zone at a speed not higher than the level crossing limit speed.
The system for safety protection of a level crossing according to claim 16, characterized in that controlling a train to decelerate a specified speed to the level crossing limit speed before a start of a level crossing zone comprises:
performing monitoring by taking the start of the level crossing zone as an end of temporary movement authority; and

controlling the train to decelerate until a full service brake speed of the train is reduced to the level crossing limit speed.
The system for a safety protection of a level crossing according to claim 16, characterized in that controlling the train to travel through the level crossing zone at a speed not higher than the level crossing limit speed comprises:
when that the full service brake speed of the train is reduced to the level crossing limit speed is satisfied, taking a front end of the train as a start of a level crossing limit speed zone, and an end of the level crossing zone as an end of the level crossing limit speed zone, incorporating the level crossing limit speed into a most restrictive speed profile, and controlling the train to travel through the level crossing limit speed zone.