A method for uncontrolled trains to maintain and automatically enforce temporary speed limits

Abstract

The application discloses a method for non-controlled train to maintain and automatically execute temporary speed limit, comprising the following steps: step S1, the non-controlled train or a dispatcher requests a movement authority from a trackside system; step S2, the trackside system judges whether a TSR exists in a section of a route request, and if yes, attempts to send the TSR command of the section to the non-controlled train; step S3, judges whether the non-controlled train and the trackside system have communication; step S4, if yes, the trackside system movement authority management under the condition of having communication is performed; step S5, if no, the trackside system movement authority management under the condition of losing communication is performed; step S6, after the trackside system movement authority management under the condition of having communication, the non-controlled train executes the TSR command; and step S7, after the trackside system movement authority management under the condition of losing communication, the non-controlled train executes the TSR command. The non-controlled train can continue to automatically execute the temporary speed limit command even in the case of losing communication with the trackside, so that the operation efficiency is improved, and the risk of overspeed operation is reduced.

Description

Technical Field

[0001] This invention relates to the field of rail transit signaling system technology, specifically a method for maintaining and automatically implementing temporary speed limits for uncontrolled trains. Background Technology

[0002] In the field of rail transit signaling systems, the use of uncontrolled vehicles is quite common, generally when controlled vehicles lose communication or are about to enter an area without communication. With the onboard control system providing speed monitoring and protection, the driver is responsible for train operation. Temporary speed limits, on the other hand, are area speed limit commands sent by the automatic train monitoring system in special scenarios, generally lower than the normal protected speed for that area.

[0003] In traditional designs, uncontrolled trains do not directly execute temporary speed limit commands. Even when communication with the trackside is available, the location and speed limit of the temporary speed limit must be communicated to the uncontrolled train driver via trackside signals or manual authorization. The driver then controls the train speed to ensure it does not exceed the temporary speed limit. If communication is lost, the uncontrolled train will directly clear the previous temporary speed limit command. The driver can only obtain the command and re-authorize it through a central operator before the train can depart in non-automatic mode. This not only reduces operational efficiency but also increases the risk of speeding due to human error.

[0004] CN103863363A discloses a temporary speed limit processing system and method for uncontrolled trains. This method uses the prohibition status of a control signal to prompt the uncontrolled train with a temporary speed limit command. When the signal displays a prohibition signal, the uncontrolled train obtains the minimum temporary speed limit value for the relevant section through a temporary speed limit request. However, when communication between the train and the trackside is lost, the uncontrolled train cannot successfully obtain the minimum temporary speed limit value. This method cannot solve the problem of failing to maintain the temporary speed limit command after the train loses communication with the trackside. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of existing methods and provide a method for maintaining and automatically executing temporary speed limits for uncontrolled trains, so that uncontrolled trains can continue to automatically execute temporary speed limit commands even when communication with the trackside is lost, thereby improving operating efficiency and reducing the risk of speeding.

[0006] The technical solution to achieve the above objectives is:

[0007] A method for maintaining and automatically implementing temporary speed limits for uncontrolled trains includes:

[0008] Step S1: The uncontrolled train or the dispatcher requests movement authorization from the trackside system;

[0009] Step S2: The trackside system determines whether there is a TSR (Temporary Speed ​​Restriction) in the section for which the route request is made. If there is, it attempts to send the TSR command for that section to the uncontrolled train.

[0010] Step S3: Determine whether the uncontrolled train is communicating with the trackside system;

[0011] Step S4: If applicable, perform trackside system movement authorization management under communication conditions.

[0012] Step S5: If not, then perform trackside system mobility authorization management under communication loss conditions;

[0013] Step S6: After the trackside system movement authorization management is completed under communication conditions, the uncontrolled train executes the TSR command.

[0014] Step S7: After the trackside system movement authorization management under communication loss conditions, the uncontrolled train executes the TSR command.

[0015] Preferably, step S2 further includes:

[0016] If it is determined that there is no TSR command in the route request, then the route is authorized for the uncontrolled train according to other route authorization conditions.

[0017] Preferably, step S4 includes:

[0018] Step S41: After receiving the TSR command, the uncontrolled train sends a message confirming the TSR command to the trackside system.

[0019] Step S42: The trackside system establishes communication with the uncontrolled train and determines whether it has received a message from the uncontrolled train confirming receipt of the TSR command for the section.

[0020] Step S43: If the determination is no, the trackside system refuses to authorize the route and illuminates the stop light of the signal associated with the TSR ahead of the uncontrolled train.

[0021] Step S44: If the determination is yes, the trackside system stores the TSR message that the uncontrolled train confirmed for the section, and deletes the previous messages that the uncontrolled train confirmed for other TSRs in the section.

[0022] Preferably, step S5 includes:

[0023] Step S51: The trackside system determines whether it has previously established communication with the uncontrolled train and received information from the train confirming the TSR command or a lower TSR command.

[0024] Step S52: If the determination is negative, the authorized route is denied and the prohibition light of the signal containing the TSR in the open section ahead of the uncontrolled train is turned on;

[0025] Step S53: If the determination is yes, then authorize the route for the uncontrolled train according to other route authorization conditions.

[0026] Preferably, in step S52, after denying the authorized route and illuminating the prohibition light of the signal containing the TSR in the open section ahead of the uncontrolled train, the driver needs to manually reconfirm the TSR command with the dispatcher before driving the train and controlling the speed in manual mode.

[0027] Preferably, step S6 includes:

[0028] Step S61: After receiving the TSR command, the uncontrolled train stores and executes the TSR command.

[0029] Step S62: Determine whether the uncontrolled train maintains communication with the trackside system. If communication continues, continuously receive and execute TSR commands, then repeatedly execute steps S1 to S4 and step S6.

[0030] Preferably, step S7 includes:

[0031] Step S71: Determine whether the uncontrolled train restarted or crashed during the communication loss period;

[0032] In step S72, if a restart or crash occurs, the train will read and display the TSR information in the flash memory after restarting. The driver needs to reconfirm the latest TSR with the dispatcher. If the latest TSR is the same as or higher than the TSR displayed on the train, the train is allowed to maintain the current mode and continue to implement the current temporary speed limit. Otherwise, the automatic mode must be exited, and the train must be driven manually to control the speed. At the same time, the dispatcher needs to confirm whether all TSR confirmation messages of the train previously stored in the trackside system are in the TSR information displayed on the train. If not, the TSR confirmation messages of the train stored in the trackside system need to be deleted.

[0033] Step S73: If no restart or crash occurs, the trackside system determines whether the section TSR command has changed.

[0034] Step S74: If the section TSR command has not changed, the uncontrolled train is allowed to maintain the current mode and continue to execute the current TSR command.

[0035] In step S75, if the TSR command for a section changes or a new TSR command for a section is added, return to step S51 to determine whether communication has been established with the uncontrolled train and whether the train has confirmed the TSR command or a lower TSR command. If the determination is no, route authorization is denied and the prohibition light of the signal containing the TSR in the open section ahead of the uncontrolled train is illuminated. If the determination is yes, the route is authorized for the uncontrolled train according to other route authorization conditions.

[0036] The beneficial effects of this invention are as follows: Under this invention, uncontrolled trains can maintain and automatically execute temporary speed limits. Even after communication between the train and the trackside is lost, as long as the temporary speed limit command is not changed and the train is not restarted, the temporary speed limit can still be safely and automatically executed. This can improve the operating efficiency of uncontrolled trains while ensuring driving safety and reduce the risk of speeding caused by manual speed control. The train only needs to switch to manual driving mode to manually control the speed in two situations: when the signal ahead is a stop light; or when the train's onboard controller crashes or restarts and fails to establish communication with the trackside after restarting. In other situations, the current automatic driving mode can be maintained and operation can continue. In addition, even when communication with the train is lost, the trackside system can still reduce the frequency of stop lights at TSR points through historical confirmation information, thereby improving operating efficiency and safety. Attached Figure Description

[0037] Figure 1 This is a flowchart of a method for maintaining and automatically implementing temporary speed limits for uncontrolled trains according to the present invention;

[0038] Figure 2 This is a detailed flowchart of the movement authorization management of the trackside system under communication conditions in this invention;

[0039] Figure 3 This is a flowchart illustrating the specific process of trackside system mobility authorization management under communication loss conditions in this invention.

[0040] Figure 4 This is a flowchart illustrating the execution of TSR commands by uncontrolled trains after trackside system movement authorization management under communication conditions in this invention.

[0041] Figure 5 This is a flowchart illustrating the specific process of an uncontrolled train executing a TSR command after the trackside system moves under communication loss conditions in this invention. Detailed Implementation

[0042] The technical solution of the present invention will now be clearly and completely described in conjunction with the accompanying drawings. In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0043] The invention will now be further described with reference to the accompanying drawings.

[0044] Under current technology, uncontrolled trains cannot maintain and automatically execute temporary speed limit commands. Especially when communication with the trackside system is lost, the train clears the existing temporary speed limit commands and can only be downgraded to a non-automatic mode to obtain temporary speed limit commands through manual confirmation. As a result, it cannot obtain protection through the system, which reduces operating efficiency and increases the risk of speeding.

[0045] In this implementation case, the VOBC (Onboard Controller) is used for automatic train driving control or to provide safety protection for manual train driving, and in this case, it is particularly used for overspeed protection. After requesting movement from the trackside system and obtaining authorization, the VOBC can control or allow the train to operate safely within the authorized movement range.

[0046] In this implementation example, the MCU (Mobility Control Unit, a specific type of trackside system) is used for train movement authorization management, opening signals or illuminating stop lights according to movement authorization, and receiving temporary speed limit commands for a section from the dispatcher and forwarding them to the VOBC. In this case, it is also used to receive and store TSR confirmation messages sent by the VOBC.

[0047] like Figure 1 As shown, a method for an uncontrolled train to maintain and automatically execute a temporary speed limit includes:

[0048] Step S1, Uncontrolled Train VOBC i Alternatively, the dispatcher may request a move authorization from the MCU.

[0049] Step S2, the MCU determines the Trackzone of the route request. m Does a TSR exist? If a TSR exists, attempt to execute the TSR command for that segment, i.e., {Trackzone}. m TSR pThe route request is sent to the uncontrolled train; if it is determined that there is no TSR command in the route request, the route is authorized for the uncontrolled train according to other route authorization conditions.

[0050] In this embodiment, the track between two signals consists of one or more sections, which are used to indicate the position of the train and the track occupancy status, and are also the objects to which temporary speed limit orders are issued.

[0051] Step S3: Determine whether the uncontrolled train is communicating with the MCU.

[0052] Step S4: If applicable, perform MCU mobile authorization management under communication conditions.

[0053] like Figure 2 As shown, step S4 specifically includes:

[0054] Step S41: After receiving the TSR command, the uncontrolled train will send a confirmation message {VOBC} to acknowledge the TSR command. i Trackzone m TSR p Send to the MCU.

[0055] Step S42: The MCU establishes communication with the uncontrolled train and determines whether it has received a message from the uncontrolled train confirming receipt of the TSR command for that section {VOBC}. i Trackzone m TSR p}

[0056] Step S43: If the determination is negative, the MCU refuses to authorize the route and illuminates the stop light of the signal associated with the TSR ahead of the uncontrolled train.

[0057] Step S44: If the determination is yes, the MCU stores the uncontrolled train confirmation message {VOBC} for that section of the TSR. i Trackzone m TSR p}, and delete the previous message from the uncontrolled train confirming other TSRs in that section.

[0058] Step S5: If not, perform MCU mobile authorization management under communication loss conditions.

[0059] like Figure 3 As shown, step S5 specifically includes:

[0060] Step S51, the MCU determines whether the train confirmation TSR information list contains confirmation information for the train, the section, and the TSR {VOBC}. i Trackzone m TSRp}, or {VOBC i Trackzone m TSR p-1}, where TSR p-1 TSR p Low.

[0061] In step S52, if the determination is negative, the authorized route is denied and the prohibition light of the signal containing the TSR in the open section ahead of the uncontrolled train is turned on.

[0062] In this embodiment, after denying the authorized route and illuminating the prohibition light of the signal containing the TSR in the open section ahead of the uncontrolled train, the driver needs to manually reconfirm the TSR command with the dispatcher before driving the train and controlling the speed in manual mode.

[0063] Step S53: If the determination is yes, then authorize the route for the uncontrolled train according to other route authorization conditions.

[0064] In step S6, after the MCU moves under communication conditions, the uncontrolled train executes the TSR command.

[0065] like Figure 4 As shown, step S6 specifically includes:

[0066] Step S61, Uncontrolled Train VOBC i Upon receiving the TSR command, store and execute the TSR command {Trackzone} m TSR p}

[0067] Step S62: Determine whether the uncontrolled train maintains communication with the MCU. If communication continues, the train will continue to receive and execute TSR commands. Then, repeat steps S1 to S4 and step S6.

[0068] Step S7: After the MCU moves under communication loss conditions, the uncontrolled train executes the TSR command.

[0069] like Figure 5 As shown, step S7 specifically includes:

[0070] Step S71: Determine whether the uncontrolled train restarted or crashed during the communication loss period.

[0071] Step S72, if a restart or crash occurs, VOBC i After restarting, the TSR information in the flash memory is read and displayed. The driver needs to reconfirm the latest TSR with the dispatcher; if the latest TSR and VOBC are... i If the displayed TSR is the same as or higher than the value, then VOBC is allowed. iMaintain the current mode and continue implementing the current temporary speed limit; otherwise, exit automatic mode and manually drive the train to control its speed; simultaneously, the dispatcher must confirm the VOBC previously stored in the MCU. i Are all TSR confirmation messages in VOBC? i In the displayed TSR information, if {Trackzone m ,TSR p} is not present; {VOBC} needs to be removed. i Trackzone m TSR p-1} Delete from the messages stored in the MCU.

[0072] In step S73, if no restart or crash occurs, the MCU determines whether the segment TSR command has changed.

[0073] In step S74, if the section TSR command has not changed, the uncontrolled train is allowed to maintain the current mode and continue to execute the current TSR command.

[0074] Step S75, if the MCU determines the Trackzone segment m The temporary speed limit order has changed to TSR. q And TSR q TSR p Smaller, or a new Trackzone section has been added. n Temporary speed limit TSR q If the condition is not met, return to step S51 to determine whether communication has been established with the uncontrolled train and whether the train has confirmed the TSR command or a lower TSR command. If the condition is not met, route authorization is denied and the stop light of the signal containing the TSR in the open section ahead of the uncontrolled train is turned on. If the condition is met, the route is authorized for the uncontrolled train according to other route authorization conditions.

[0075] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for maintaining and automatically implementing temporary speed limits for uncontrolled trains, characterized in that, include: Step S1: The uncontrolled train or the dispatcher requests movement authorization from the trackside system; Step S2: The trackside system determines whether there is a TSR in the section for which the route request is made. If there is, it attempts to send the TSR command for that section to the uncontrolled train. Step S3: Determine whether the uncontrolled train is communicating with the trackside system; Step S4: If applicable, perform trackside system movement authorization management under communication conditions. Step S5: If not, then perform trackside system mobility authorization management under communication loss conditions; Step S6: After the trackside system movement authorization management is completed under communication conditions, the uncontrolled train executes the TSR command. Step S7: After the trackside system movement authorization management under communication loss conditions, the uncontrolled train executes the TSR command; Step S5 includes: Step S51: The trackside system determines whether it has previously established communication with the uncontrolled train and received information from the train confirming the TSR command or a lower TSR command. Step S52: If the determination is negative, the authorized route is denied and the prohibition light of the signal containing the TSR in the open section ahead of the uncontrolled train is turned on; Step S53: If the determination is yes, then authorize the route for the uncontrolled train according to other route authorization conditions; Step S7 includes: Step S71: Determine whether the uncontrolled train restarted or crashed during the communication loss period; In step S72, if a restart or crash occurs, the train will read and display the TSR information in the flash memory after restarting. The driver needs to reconfirm the latest TSR with the dispatcher. If the latest TSR is the same as or higher than the TSR displayed on the train, the train is allowed to maintain the current mode and continue to implement the current temporary speed limit. Otherwise, the automatic mode must be exited, and the train must be driven manually to control the speed. At the same time, the dispatcher needs to confirm whether all TSR confirmation messages of the train previously stored in the trackside system are in the TSR information displayed on the train. If not, the TSR confirmation messages of the train stored in the trackside system need to be deleted. Step S73: If no restart or crash occurs, the trackside system determines whether the section TSR command has changed. Step S74: If the section TSR command has not changed, the uncontrolled train is allowed to maintain the current mode and continue to execute the current TSR command. In step S75, if the TSR command for a section changes or a new TSR command for a section is added, return to step S51 to determine whether communication has been established with the uncontrolled train and whether the train has confirmed the TSR command or a lower TSR command. If the determination is no, route authorization is denied and the prohibition light of the signal containing the TSR in the open section ahead of the uncontrolled train is illuminated. If the determination is yes, the route is authorized for the uncontrolled train according to other route authorization conditions.

2. The method for maintaining and automatically implementing temporary speed limits for uncontrolled trains according to claim 1, characterized in that, Step S2 further includes: If it is determined that there is no TSR command in the route request, then the route is authorized for the uncontrolled train according to other route authorization conditions.

3. The method for maintaining and automatically implementing temporary speed limits for uncontrolled trains according to claim 1, characterized in that, Step S4 includes: Step S41: After receiving the TSR command, the uncontrolled train sends a message confirming the TSR command to the trackside system. Step S42: The trackside system establishes communication with the uncontrolled train and determines whether it has received a message from the uncontrolled train confirming receipt of the TSR command for the section. Step S43: If the determination is no, the trackside system refuses to authorize the route and illuminates the stop light of the signal associated with the TSR ahead of the uncontrolled train. Step S44: If the determination is yes, the trackside system stores the TSR message that the uncontrolled train confirmed for the section, and deletes the previous messages that the uncontrolled train confirmed for other TSRs in the section.

4. The method for maintaining and automatically implementing temporary speed limits for uncontrolled trains according to claim 1, characterized in that, In step S52, after denying the authorized route and illuminating the prohibition light of the signal containing the TSR in the open section ahead of the uncontrolled train, the driver needs to manually reconfirm the TSR command with the dispatcher before driving the train and controlling the speed in manual mode.

5. A method for maintaining and automatically implementing temporary speed limits for uncontrolled trains according to claim 3, characterized in that, Step S6 includes: Step S61: After receiving the TSR command, the uncontrolled train stores and executes the TSR command. Step S62: Determine whether the uncontrolled train maintains communication with the trackside system. If communication continues, continuously receive and execute TSR commands, then repeatedly execute steps S1 to S4 and step S6.

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