A temporary train speed limit control method applicable to conventional railways

Abstract

The present invention relates to a method for controlling temporary speed limits on conventional railway trains, including setting a temporary speed limit control range and operating the temporary speed limit control. A dispatcher at a dispatching center drafts a temporary speed limit dispatch command, including a speed limit area, a speed limit time, and a speed limit value, through a CTC / TDCS dispatch console. After the temporary speed limit dispatch command is drafted, it is converted into a formatted, non-text communication data frame and sent by CTC / TDCS central equipment to CTC / TDCS station equipment. The formatted temporary speed limit dispatch command is then sent to an onboard LKJ device via the station train control equipment. The temporary speed limit control scheme of the present invention not only meets the requirements of requiring no human intervention during the temporary speed limit control process, achieving a high degree of automation and strong safety performance, but also offers the advantages of requiring less equipment, simplifying control functions, reducing project costs, and facilitating easy construction and maintenance.

Description

Technical Field

[0001] The present invention relates to the field of conventional railway signal control, and in particular to temporary speed limit control of conventional railway trains. Background Art

[0002] Temporary speed limits are crucial for train safety. The CTCS-0 system (C0 system) primarily implements temporary speed limits on conventional railway lines by loading dispatch commands via IC cards into the train operation monitoring and recording device (LKJ). The dispatch office issues temporary speed limit dispatch commands to the locomotive and engineering departments. The locomotive department compiles the LKJ temporary speed limit data and sends it to the driver dispatch office. The driver dispatch office writes the LKJ data for the designated operating section onto an IC card. The driver then carries the IC card aboard the train and loads the data onto the LKJ device, which then monitors the temporary speed limit. However, IC card dispatch commands are passed down through multiple layers of management, resulting in lengthy management processes and extensive manual effort. This leads to significant safety risks such as errors, omissions, and delays in temporary speed limit control.

[0003] Based on the proven experience of implementing temporary speed limit control solutions based on IC card storage, further research is underway to develop more reliable and secure temporary speed limit control solutions that are more suitable for conventional railway operations. Analysis of other temporary speed limit control solutions in the China Train Control System (CTCS) reveals that they also have certain shortcomings, making them difficult to meet the requirements for large-scale application on conventional railways. The specific situation is as follows:

[0004] (1) Temporary speed limit control in the CTCS-2 level speed-up section of the existing line. The temporary speed limit dispatching command is centrally managed by the dispatching center. The central dispatcher issues the temporary speed limit dispatching command to the station under the jurisdiction of the temporary speed limit through the dispatching centralization system (CTC) or the train dispatching command system (TDCS) according to the area where the temporary speed limit is located. The station duty officer verifies and signs for the temporary speed limit dispatching command and sends the temporary speed limit dispatching command to the station train control center (TCC) at an appropriate time. The TCC selects the corresponding temporary speed limit transponder message and transmits it to the train control on-board equipment through the ground electronic unit (LEU) and the transponder to perform temporary speed limit monitoring. This solution solves the problem of manual transmission of the temporary speed limit operation revealing dispatching command in the above-mentioned IC card temporary speed limit solution, but it still requires some manual intervention, such as: the central dispatcher needs to decompose the temporary speed limit dispatching command to the corresponding station according to the specific area of ​​the temporary speed limit; the station duty officer needs to "select" the temporary speed limit command to the TCC equipment and execute it according to the start time of the temporary speed limit plan. In particular, the timing of the temporary speed limit must be carefully controlled by station attendants. Issuing it too early can lead to multiple temporary speed limits, while issuing it too late can lead to unsafe situations where there are no controls. Furthermore, due to the limited range of TCC temporary speed limits, each station must have a TCC, which requires a large number of devices, a complex system, and high construction and maintenance costs.

[0005] (2) Temporary speed limit control of high-speed rail CTCS-2 and CTCS-3 level train control systems (referred to as C2 system and C3 system). Temporary speed limit server (TSRS) equipment is set up in the dispatching center according to the corresponding train dispatching console. The central dispatcher sends the temporary speed limit command to TSRS in advance. TSRS verifies and stores the temporary speed limit command. Before the scheduled execution time of the temporary speed limit command, TSRS prompts the central dispatcher to verify and issue the temporary speed limit execution command. After receiving the execution command, TSRS sends the temporary speed limit command to the corresponding station TCC. The CTCS-3 level section also needs to send the temporary speed limit command to the corresponding regional radio block center (RBC). The TCC transmits the temporary speed limit command to the train control on-board equipment through the LEU and transponder, and the RBC transmits the temporary speed limit command through the GSM-R wireless network to achieve temporary speed limit control of the train. This solution solves the problem of manual intervention in the temporary speed limit control process. After the central dispatcher issues the dispatching command from the "source", the temporary speed limit control process is completed by the train control safety equipment. The control interface is clear and the control process is safe. However, in this solution, TSRS is only responsible for the centralized management, storage, and verification of temporary speed limit commands. It still needs to rely on the station TCC to generate transponder messages in real time, and requires RBC to generate wireless messages in combination with driving permit information to further transmit temporary speed limit commands to on-board equipment. In order to connect the central TSRS with the station TCC, a dedicated signal safety data network needs to be built. This solution has problems such as a large number of devices and interfaces, high engineering construction costs, and difficulty in operation and maintenance, making it unsuitable for implementation on conventional railways. At the same time, due to the limitations of the TCC temporary speed limit jurisdiction, the CTCS-3 level line TSRS also needs to connect to the TCC and RBC at the same time. This solution needs to solve problems such as multiple verification and multiple splitting of temporary speed limit commands, and the system functions are complex.

[0006] Based on the above analysis of the three existing temporary speed limit control methods, the present invention proposes a new temporary speed limit control scheme based on the temporary speed limit control needs of conventional railways and the characteristics that on-board equipment is mainly LKJ. This scheme can not only meet the requirements of the temporary speed limit control process without manual intervention, high degree of automation and strong safety performance, but also has the advantages of a small number of equipment, simple control functions, low project cost and convenient construction and maintenance. It has important practical significance and market value. Summary of the Invention

[0007] The purpose of the present invention is to propose a temporary speed limit control method for trains on conventional railways, to realize the automation and informatization of the temporary speed limit control process, to meet the safety requirements of railway signal functions, and to be innovative, economical and applicable.

[0008] The present invention provides a method for controlling temporary speed limits on trains applicable to conventional railways. The method comprises setting a temporary speed limit control range and performing temporary speed limit control operations. The method inherits the temporary speed limit control mode of the on-board LKJ equipment based on operation-revealed dispatching commands. A dispatcher at the dispatching center formulates a temporary speed limit dispatching command through a CTC / TDCS dispatching console. The temporary speed limit dispatching command mainly includes: speed limit area, speed limit time, and speed limit value.

[0009] The speed limit area is described by using four elements: the railway line number, the type of the railway line, the starting kilometer mark and the ending kilometer mark, that is, the temporary speed limit area of ​​the railway line is marked with an absolute kilometer mark;

[0010] The speed limit time includes the start time and the end time, which are expressed in the format of "year / month / day / hour / minute", that is, the speed limit time is indicated in absolute time;

[0011] The speed limit values ​​are divided into passenger car speed limit and truck speed limit;

[0012] After the temporary speed limit dispatch command is formulated, it is converted into a formatted, non-text communication data frame and sent by the CTC / TDCS central equipment to the CTC / TDCS station equipment. The formatted temporary speed limit dispatch command is then sent to the on-board LKJ equipment via the station train control equipment.

[0013] The on-vehicle LKJ device performs temporary speed limit monitoring according to the speed limit area, speed limit time and speed limit value determined by the temporary speed limit scheduling command.

[0014] The temporary speed limit control solution of the present invention can not only meet the requirements of the temporary speed limit control process without manual intervention, high degree of automation and strong safety performance, but also has the advantages of small number of equipment, simple control functions, low project cost and convenient construction and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention, the following is a brief introduction to the figures required for use in the embodiments. Obviously, the figures described below are only some embodiments of the present invention. For ordinary technicians in this field, other figures can be obtained based on these figures without paying any creative work.

[0016] Figure 1 This is a connection diagram of the temporary speed limit control device based on TSRC;

[0017] Figure 2 This is a schematic diagram of the line TSRC equipment settings and temporary speed limit control range;

[0018] Figure 3 This is a schematic diagram of the operation flow of the train control temporary speed limit dispatch command. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the figures of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0020] The existing temporary speed limit control method based on IC card storage on conventional railways has shortcomings such as low degree of automation and complex management process. The temporary speed limit control method for the C2 level speed-up section of existing lines has shortcomings such as complex equipment, high cost, and some operations require human intervention. The temporary speed limit control scheme for the C2 and C3 systems of high-speed railways has shortcomings such as complex equipment, high cost, and complex system functions. The latter two are not suitable for the implementation and application maintenance of existing conventional railway line engineering renovation projects.

[0021] The present invention proposes a temporary speed limit control method applicable to conventional railways. The method inherits the temporary speed limit control mode of the on-board LKJ equipment based on the operation-revealed dispatching command, and sets and cancels the temporary speed limit on a dispatching desk basis. The central dispatcher formulates and issues the temporary speed limit dispatching command through the dispatching desk. The temporary speed limit dispatching command is designed with an absolute kilometer mark and an absolute time. The command is transmitted to the station TSRC via the CTC / TDCS station machine, and then transmitted to the on-board LKJ equipment via the transponder transmission system (LEU, transponder and BTM) to complete the temporary speed limit monitoring. The TSRC is set at the departure station and boundary-related stations within the train control range of the dispatching desk. The method can meet the automation and safety requirements of the temporary speed limit control process, and has the advantages of small equipment quantity, simple control function, and low engineering construction and maintenance costs.

[0022] The present invention provides a method for controlling the temporary speed limit of a train on a conventional railway. Figure 1 The temporary speed limit control system shown in the figure is implemented. The system mainly includes central equipment: CTC / TDCS dispatch console; station equipment: CTC / TDCS station machine, TSRC, enhanced LEU, active transponder; and on-board equipment: enhanced LKJ, BTM (including antenna), etc.

[0023] The present invention is a method for controlling temporary speed limits for trains on conventional railways. It inherits the temporary speed limit control method of the on-board LKJ equipment based on the operation-revealed dispatching command. The dispatcher at the dispatching center formulates the temporary speed limit dispatching command through the CTC / TDCS dispatching console. The main contents of the command include: speed limit area, speed limit time and speed limit value. The speed limit area is described by four elements: the engineering line number, the up and down line type of the line, the starting kilometer mark and the ending kilometer mark. That is, the temporary speed limit area of ​​the line is marked with an absolute kilometer mark. This is different from the C2 and C3 systems, which use the transponder as the reference point and mark the temporary speed limit area in the form of relative distance and speed limit length. The speed limit time includes the start time and the end time, and is expressed in the format of "year / month / day / hour / minute", that is, the speed limit time is marked with absolute time. The speed limit value is divided into passenger car speed limit and truck speed limit, and is based on the vehicle type, with the unit of kilometer / hour. After a temporary speed limit dispatch command is drafted, it is converted into a formatted, non-text communication data frame and sent by the CTC / TDCS central equipment to the CTC / TDCS station equipment. The formatted temporary speed limit command is then transmitted via the station train control equipment to the onboard LKJ equipment. The LKJ equipment implements the temporary speed limit control based on the speed limit area, speed limit time, and speed limit value specified in the temporary speed limit command. The use of temporary speed limit commands with absolute kilometer marks, absolute time, and formatted descriptions overcomes the restrictions on the temporary speed limit jurisdiction of C2 and C3 system TCC equipment, significantly reducing the number of station train control devices required. Furthermore, the content and format of the temporary speed limit commands received by the onboard LKJ equipment are compatible with existing IC card operation disclosure dispatch commands, enabling the LKJ equipment to reliably execute temporary speed limit monitoring functions.

[0024] Furthermore, the temporary speed limit dispatch command of the present invention is automatically transmitted based on the equipment, realizing the integration of dispatch command and safety control. The method performs operations such as drafting, issuing, executing and canceling the temporary speed limit dispatch command based on the dispatching station. The temporary speed limit control range is consistent with the train command jurisdiction of the corresponding dispatching station. First, a temporary speed limit controller (TSRC) is set up at the station with the origin operation and the station at the boundary of the dispatching jurisdiction. The station TSRC directly interfaces with the CTC / TDCS station equipment, receives the temporary speed limit dispatch command sent by the central dispatcher, and feeds back a successful reception instruction, which is confirmed by the central dispatcher to ensure the safety of the temporary speed limit issuance process. The TSRC then generates a temporary speed limit disclosure transponder message based on the temporary speed limit dispatch command, and sends it to the trackside transponder installed at the station entrance / exit via the LEU device. When the train passes the corresponding transponder, the temporary speed limit disclosure message is received by the on-board transponder receiving unit (BTM) and sent to the LKJ device to implement temporary speed limit control. In addition, adjacent dispatching station boundary stations (TSRCs) exchange relevant temporary speed limit information through communication interfaces. This ensures that before a train enters a station under the temporary speed limit jurisdiction of an adjacent dispatching station, if it encounters an approaching temporary speed limit zone, it can implement a preemptive speed reduction, thus ensuring the safety of temporary speed limit control. The central equipment CTC / TDCS dispatching station displays the relevant parameters of the temporary speed limit dispatching command to be drafted in a graphical interface and windowed form. The dispatching command is compatible with the C0 system temporary speed limit operation and displays the relevant content of the dispatching command. After the dispatcher enters the relevant command parameters and confirms them, the CTC / TDCS dispatching station converts the draft temporary speed limit dispatching command into a uniformly formatted, non-text communication data frame dispatching command and sends it to the station CTC / TDCS station equipment. The content and format meet the requirements of the enhanced LKJ temporary speed limit monitoring function.

[0025] The CTC / TDCS station machine is directly interfaced with the TSRC, and the CTC / TDCS station machine directly sends the temporary speed limit dispatch command information received from the central CTC / TDCS dispatch console to the TSRC.

[0026] The TSRC is directly interfaced with the enhanced LEU. The TSRC receives the temporary speed limit dispatch command sent by the CTC / TDCS station, automatically encodes and generates a temporary speed limit disclosure message in accordance with the transponder message encoding specification, and sends it to the enhanced LEU in real time. The disclosure message content and format meet the requirements of the on-board enhanced LKJ equipment for executing the temporary speed limit monitoring function.

[0027] The enhanced LEU, active transponder and BTM (including antenna) constitute the transponder transmission system of ground-to-vehicle communication, which transmits and decodes the temporary speed limit disclosure message received from TSRC and sends it to the enhanced LKJ.

[0028] The enhanced LEU directly interfaces with the TSRC based on the existing LEU equipment, and sends the received temporary speed limit disclosure message to the active transponder at the entrance / exit. The enhanced LEU adopts a transparent transmission type LEU.

[0029] Optionally, the enhanced LEU device function can be integrated into the TSRC, that is, the TSRC directly interfaces with the active transponder, instead of implementing the function of sending messages to the active transponder through the enhanced LEU, and the enhanced LEU device is no longer set up separately on the ground.

[0030] Optionally, the TSRC function can be further expanded by interfacing with station interlocking equipment so that it can send track number transponder messages at the same time, thereby improving the integration of station equipment.

[0031] The enhanced LKJ device is the core of the on-board equipment. It is based on the line basic data centrally stored on the vehicle, keeps the format and content of the temporary speed limit operation disclosure information unchanged, and on the basis of the existing LKJ equipment, receives and parses the temporary speed limit disclosure message sent by the station transponder from the BTM. The temporary speed limit content and format are compatible with the existing IC card operation disclosure dispatch command. The enhanced LKJ performs temporary speed limit monitoring of the train according to the temporary speed limit information in the message, without using the IC card to obtain the temporary speed limit operation disclosure information.

[0032] The TSRC, enhanced LEU, active balise, enhanced LKJ and BTM (including antenna) and other equipment all meet the requirements of Safety Integrity Level 4 (SIL4) for railway signaling products.

[0033] The content of the temporary speed limit dispatch command is compatible with the content and format of the temporary speed limit operation disclosure dispatch command stored in the C0 system IC card, and meets the requirements of the LKJ equipment to perform the temporary speed limit monitoring function, and at least includes the following contents: speed limit command number, starting kilometer mark of the jurisdiction, ending kilometer mark of the jurisdiction, speed limit type (no speed limit / temporary speed limit / side line speed limit), line number, line type (up / down / up and down), speed limit time period (day and night / daily), speed limit start time, speed limit end time, speed limit starting kilometer mark, speed limit ending kilometer mark, speed limit station (valid when siding speed limit), speed limit track number (valid when siding speed limit), passenger car speed limit value, truck speed limit value, among which the passenger car / truck speed limit value is set according to the actual speed limit value, with a resolution of 1km / h.

[0034] The temporary speed limit disclosure message includes a speed limit disclosure message and a speed limit disclosure message. When there is no temporary speed limit within the TSRC temporary speed limit control range, a speed limit disclosure message is sent. The message user information package mainly includes the speed limit command number, line number, speed limit type, jurisdiction start kilometer mark, jurisdiction end kilometer mark, etc., where the speed limit type is no speed limit; when there is a temporary speed limit within the temporary speed limit control range, a temporary speed limit disclosure message is sent. The message user information package mainly includes the speed limit command number, line number, speed limit type, jurisdiction start kilometer mark, jurisdiction end kilometer mark, line type, speed limit time period, start time, end time, speed limit start kilometer mark, speed limit end kilometer mark, speed limit station, speed limit track number, passenger car speed limit value, truck speed limit value, etc. If there are multiple temporary speed limit sections within the TSRC control speed limit range, then multiple variables in the above message user information package, such as "speed limit time period" and "truck speed limit value", need to be iteratively designed according to the actual speed limit conditions of the speed limit sections to describe the temporary speed limits of different sections within a jurisdiction.

[0035] The present invention provides a method for controlling temporary speed limit of trains applicable to conventional railways. The method mainly includes setting a temporary speed limit control range and performing temporary speed limit control operations (drafting, issuing, executing and canceling temporary speed limit dispatching commands, etc.).

[0036] The temporary speed limit control range is set to be managed based on the jurisdiction of the corresponding dispatching station. The temporary speed limit disclosure message is sent by the station entrance / exit trackside transponder where the TSRC is set.

[0037] TSRC is set up at the departure station within the jurisdiction of the corresponding dispatching station, which is responsible for sending the temporary speed limit notification message within the dispatching area to the departure train. The temporary speed limit control range of the TSRC at the departure station is from the boundary of the train control jurisdiction of the corresponding dispatching station, such as Figure 2 As shown, a TSRC is set at the originating station Am within the jurisdiction of the dispatching station A. Its temporary speed limit control range is consistent with the jurisdiction of the dispatching station A (the command-prepared range) and extends to the boundary of the dispatching station.

[0038] TSRC is set up at the boundary station of the dispatching jurisdiction, which is responsible for sending temporary speed limit messages within the dispatching area to trains entering the dispatching area; and for sending temporary speed limit notification messages in a certain area in front of the adjacent dispatching station to trains leaving the dispatching area. The temporary speed limit control range of TSRC at the boundary station covers the train control jurisdiction boundary of the dispatching station, and extends to the adjacent dispatching station for one station and one section, to the station entrance signal at the station in front of the boundary station of the adjacent dispatching station, such as Figure 2As shown in the figure, TSRC is set at the boundary station A1 within the jurisdiction of dispatch station A and the station B1 within the jurisdiction of dispatch station B. The temporary speed limit control range of TSRC in the downlink forward direction (or uplink reverse direction) of station A1 is to the station entrance signal of station B2. The downlink reverse direction (or uplink forward direction, not in Figure 2 The temporary speed limit control range is from the A-station traffic control jurisdiction boundary to the B1 station TSRC downlink forward (or uplink reverse, not in Figure 2 The temporary speed limit control range (shown in the middle) is to the boundary of the traffic control control at the dispatching station B, and the temporary speed limit control range in the downward reverse direction (or upward forward direction) is to the entrance signal of A2 station.

[0039] The station TSRC setup and temporary speed limit control range design ensure that trains can obtain all temporary speed limit information for the dispatching desk's jurisdiction at the departure station and the station at the boundary of the train control jurisdiction. This eliminates the need for station-by-station TSRC setup, significantly reducing the number of TSRC devices. TSRCs at stations at the boundary of adjacent dispatching desks' jurisdictions communicate and exchange temporary speed limit information within a certain range within their respective jurisdictions. This ensures that if a train encounters a temporary speed limit area before entering a station under the jurisdiction of an adjacent dispatching desk, it can implement a preemptive speed reduction, ensuring the safety of temporary speed limit control. This also ensures that the dispatching desk's jurisdiction is consistent with the scope of the temporary speed limit order issued by the dispatcher, making cross-regional temporary speed limit dispatch orders transparent to the dispatcher.

[0040] Except for the aforementioned departure station and dispatching jurisdiction boundary station, there is no need to set up TSRC at other stations.

[0041] Optionally, there are multiple temporary speed limits within the jurisdiction of a dispatching desk. In order to avoid TSRC sending irrelevant temporary speed limit information to the train and improve the utilization rate of the transponder message, TSRC can choose to send the temporary speed limit disclosure message only to the temporary speed limit control range ahead by this transponder based on the line section and direction corresponding to the exit transponder.

[0042] Optionally, if there are multiple temporary speed limit disclosure messages within the range from the exit transponder to the temporary speed limit control range ahead, and the data transmission capacity of one transponder is exceeded, the TSRC's processing capability for multiple temporary speed limits in the same driving direction can be improved by increasing the number of active transponders in the exit transponder group.

[0043] The temporary speed limit control operation process includes the process of preparing, issuing, executing and canceling the dispatch order, such as Figure 3 shown.

[0044] The dispatcher at the dispatch center drafts a temporary speed limit dispatch order and inputs the relevant control parameters of the temporary speed limit dispatch order through the dispatch terminal. During the drafting process, the dispatcher confirms the correctness of the control parameters and sends them to all CTC / TDCS stations with TSRC within the dispatch area. After receiving the temporary speed limit dispatch order, the CTC / TDCS station sends it to the connected TSRC and feeds back the dispatch order reception result to the dispatch station. After successfully receiving the dispatch order, the TSRC automatically encodes it in real time according to the transponder encoding specification, generates a transponder temporary speed limit disclosure message and sends it to the dispatch station. Enhanced LEU, and feedback the dispatch command reception result to the CTC / TDCS station machine; the enhanced LEU directly sends the received temporary speed limit disclosure message through the C interface to control the station entrance / exit active balise. When the train passes the balise, it receives the temporary speed limit disclosure message through the BTM (including antenna), decodes the user message, and sends the temporary speed limit disclosure message according to the enhanced LKJ request. After receiving the disclosure message, the enhanced LKJ parses and stores the temporary speed limit information, and performs temporary speed limit monitoring according to the speed limit area, speed limit time and speed limit value in the speed limit information.

[0045] The temporary speed limit cancellation dispatch order is prepared by the dispatcher at the dispatch center, and the control parameters are input through the corresponding dispatch console at the dispatch center. The operation process is the same as the temporary speed limit dispatch order issuance and execution process, such as Figure 3 As shown, in the temporary speed limit dispatch command, the cancellation command has the same position parameters as the temporary speed limit setting command to be canceled, the speed limit value is the maximum allowable operating speed of the line, the scheduled start time of the temporary speed limit cancellation dispatch command is fixed to be issued immediately, and the scheduled end time is fixed to be permanently effective. After receiving the cancellation command, the TSRC updates the temporary speed limit disclosure message and sends the updated temporary speed limit disclosure message through the enhanced LEU and the transponder. If there is no temporary speed limit within the temporary speed limit control range of the corresponding transponder after the temporary speed limit is canceled, the TSRC can send a speed limit disclosure message to the transponder.

[0046] During a temporary speed limit operation, the TSRC must send a receipt of the execution results to the dispatch center via the CTC / TDCS station machine. The dispatch center displays the receipt results for all TSRCs within its jurisdiction. The dispatcher uses this receipt to confirm that the temporary speed limit dispatch command has been successfully received and executed by all TSRCs. This process ensures the security of the temporary speed limit dispatch command transmission process. If the dispatcher does not receive a receipt confirming the successful receipt and execution of the temporary speed limit by all TSRCs within the specified time, or if the TSRC at any station fails to execute the command, the CTC / TDCS dispatch center equipment will issue an alarm, and the dispatcher will handle the situation according to the equipment failure emergency plan.

[0047] The station's TSRC, enhanced LEU, active balise, enhanced LKJ, BTM (including antenna) and other equipment systems and software and hardware designs all comply with SIL4 requirements, ensuring that the temporary speed limit control process meets the signal function safety requirements.

[0048] When the train departs, the enhanced LKJ monitors the train operation according to the most unfavorable speed requirement, such as 45km / h, before receiving the temporary speed limit disclosure command due to the lack of temporary speed limit information. It will not run according to the normal monitoring speed curve until it receives the temporary speed limit disclosure message at the exit transponder of the departure station.

[0049] The temporary speed limit disclosure message sent by TSRC includes the message of no temporary speed limit disclosure, and the message contains the kilometer mark information of the jurisdiction. If the train approaches the jurisdiction boundary specified in the temporary speed limit disclosure message, the enhanced LKJ fails to receive the updated temporary speed limit disclosure message, such as the transponder failure and the failure to receive the transponder message, or the TSRC or LEU failure and receives the default message, the enhanced LKJ controls the train to slow down to the specified speed, such as 45km / h, before the jurisdiction boundary according to the most unfavorable conditions to ensure the safe operation of the train.

[0050] Optionally, if the enhanced LKJ device restarts in the section, after the restart is successful, it is allowed to continue to use the received and stored temporary speed limit information to perform temporary speed limit monitoring until the updated temporary speed limit disclosure message is received before entering the control range of the adjacent dispatching station, thereby reducing the impact of the enhanced LKJ device restarting in the section due to a failure on driving.

[0051] Through the above design, the functions related to the formulation, issuance, execution and cancellation of temporary speed limit dispatching commands can meet the signal failure-safety requirements and ensure the safety of temporary speed limit control.

[0052] The technical advantages of the present invention are as follows: (1) The temporary speed limit dispatching command is uniformly "sourced" by the dispatching center, automatically transmitted through the equipment, and directly transmitted to the on-board LKJ equipment to implement temporary speed limit control, which is integrated with management and control, and solves the problem of manual transmission of dispatching commands to reveal the temporary speed limit operation of IC;

[0053] (2) After the temporary speed limit command is confirmed by the central dispatcher, it is automatically transmitted to the station TSRC, which then transmits it to the on-board LKJ equipment via the balise transmission system (including LEU, balise, and BTM) for execution. The design of the relevant equipment and control process complies with the signal function safety requirements, ensuring the safety of the temporary speed limit control;

[0054] (3) By adopting the design of temporary speed limit dispatching commands with absolute kilometer marks and absolute time, on the one hand, the temporary speed limit control range is expanded from the station to the dispatching desk, reducing the number of TSRC devices set up at the station; on the other hand, except for TSRC encoding the formatted temporary speed limit command and the on-board BTM equipment decoding it, no other processing is required, such as temporary speed limit command verification, splitting and conversion. The system has simple functions, simple equipment, reliability and safety, which is convenient for implementation and subsequent application maintenance in the reconstruction of existing conventional railway lines, and has important market application value.

[0055] The above embodiments are provided to persons familiar with the art for implementing or using the present invention. Personnel familiar with the art may make various modifications or changes to the above embodiments without departing from the inventive concept of the present invention, and these modifications or changes shall fall within the scope of protection of the present invention.

Claims

1. A method for controlling temporary train speed limit on conventional railways, characterized in that: Including temporary speed limit control range setting and temporary speed limit control operation, the temporary speed limit control range setting is managed based on the jurisdiction of the corresponding dispatch station traffic control; The method inherits the temporary speed limit control mode of the vehicle-mounted LKJ equipment based on the operation-revealed dispatch command. The dispatch center dispatcher formulates the temporary speed limit dispatch command through the CTC / TDCS dispatch console. The temporary speed limit dispatch command mainly includes: speed limit area, speed limit time and speed limit value; The speed limit area is described by using four elements: the railway line number, the type of the railway line, the starting kilometer mark and the ending kilometer mark, that is, the temporary speed limit area of ​​the railway line is marked with an absolute kilometer mark; The speed limit time includes the start time and the end time, which are expressed in the format of "year / month / day / hour / minute", that is, the speed limit time is indicated in absolute time; The speed limit values ​​are divided into passenger car speed limit and truck speed limit; After the temporary speed limit dispatching command is formulated, it is converted into a formatted, non-text communication data frame and sent by the CTC / TDCS central equipment to the CTC / TDCS station equipment, and then the formatted temporary speed limit dispatching command is sent to the on-board LKJ equipment via the station train control equipment; the station train control equipment is the station TSRC; a TSRC is set up at the originating operation station within the jurisdiction of the corresponding dispatching desk, responsible for sending the temporary speed limit disclosure message within the dispatching area to the originating train; a TSRC is set up at the boundary station of the dispatching jurisdiction area, responsible for sending the temporary speed limit disclosure message within the dispatching area to the train entering the jurisdiction of the dispatching desk; and responsible for sending the temporary speed limit disclosure message within a certain area in front of the adjacent dispatching desk to the train leaving the jurisdiction of the dispatching desk; except for the originating station and the dispatching jurisdiction boundary station, other stations do not need to be set up with TSRC; The on-vehicle LKJ device performs temporary speed limit monitoring according to the speed limit area, speed limit time and speed limit value determined by the temporary speed limit scheduling command.

2. The method for controlling temporary train speed limit according to claim 1, characterized in that: The temporary speed limit dispatch command is transmitted to the station TSRC through the CTC / TDCS station machine, and then transmitted to the on-board LKJ equipment via the transponder transmission system by the TSRC to complete the temporary speed limit control. The transponder transmission system includes LEU, transponder and BTM.

3. The method for controlling temporary train speed limit according to claim 2, characterized in that: The temporary speed limit control operation includes the formulation, issuance, execution and cancellation of the temporary speed limit dispatch order; the method uses the dispatch station as a unit to perform the formulation, issuance, execution and cancellation operations of the temporary speed limit dispatch order, and the temporary speed limit control range is consistent with the traffic control jurisdiction of the corresponding dispatch station; the TSRC is set at the starting station and boundary-related stations within the traffic control jurisdiction of the dispatch station.

4. The method for controlling temporary train speed limit according to claim 1, characterized in that: The method is implemented by a temporary speed limit control system, which includes Central equipment: CTC / TDCS dispatch console; Station equipment: CTC / TDCS station machine, TSRC, enhanced LEU, active balise; And on-board equipment: enhanced LKJ, BTM; The station TSRC directly interfaces with the CTC / TDCS station equipment; the TSRC directly interfaces with the enhanced LEU.

5. The method for controlling temporary train speed limit according to claim 4, characterized in that: The enhanced LKJ device is the core of the on-board equipment. It is based on the line basic data centrally stored on the vehicle, keeps the format and content of the temporary speed limit operation disclosure information unchanged, and on the basis of the existing LKJ equipment, receives and parses the temporary speed limit disclosure message sent by the station transponder from the BTM. The temporary speed limit content and format are compatible with the existing IC card operation disclosure dispatch command. The enhanced LKJ performs temporary speed limit monitoring of the train according to the temporary speed limit information in the message, without using the IC card to obtain the temporary speed limit operation disclosure information.

6. The method for controlling temporary train speed limit according to claim 5, characterized in that: The temporary speed limit disclosure message includes a non-speed limit disclosure message and a speed limit disclosure message; When there is no temporary speed limit within the TSRC temporary speed limit control area, a speed limit disclosure message is sent. The message user information package includes the speed limit command number, line number, speed limit type, jurisdiction start kilometer mark and jurisdiction end kilometer mark, where the speed limit type is no speed limit; When there is a temporary speed limit within the temporary speed limit control range, a temporary speed limit disclosure message is sent. The message user information package content includes the speed limit command number, line number, speed limit type, starting kilometer mark of the jurisdiction, ending kilometer mark of the jurisdiction, line type, speed limit time period, start time, end time, starting kilometer mark of the speed limit, ending kilometer mark of the speed limit, speed limit station, speed limit track number, passenger car speed limit value, and truck speed limit value.

7. The method for controlling temporary train speed limit according to claim 5, characterized in that: The temporary speed limit disclosure message is sent by the station entrance / exit trackside transponder where TSRC is set; The temporary speed limit control range of the TSRC at the boundary station covers the boundary of the train control jurisdiction of this dispatching station, and extends one station and one section to the adjacent dispatching station, to the station entrance signal in front of the boundary station of the adjacent dispatching station.

8. The method for controlling temporary train speed limit according to claim 7, characterized in that: The station TSRC setting and temporary speed limit control range design in the method enable the train to obtain all temporary speed limit information of the dispatching desk's jurisdiction area at the departure station and the station at the boundary of the train control jurisdiction, without the need to set up TSRC for each station; the TSRCs of the stations at the boundary of the adjacent dispatching desk's jurisdiction communicate with each other and exchange temporary speed limit information within a certain range of their respective jurisdictions, ensuring that if a train encounters a temporary speed limit area before entering a station under the jurisdiction of an adjacent dispatching desk, it can implement early speed reduction to ensure the safety of temporary speed limit control. At the same time, the jurisdiction of the dispatching desk is consistent with the scope of the temporary speed limit order formulated by the dispatcher, and the cross-regional temporary speed limit dispatching order is transparent to the dispatcher.

9. The method for controlling temporary train speed limit according to claim 7, characterized in that: TSRC can choose to send the temporary speed limit disclosure message only to the temporary speed limit control range ahead from this balise according to the line section and direction corresponding to the exit balise.

10. The method for controlling temporary train speed limit according to claim 5, characterized in that: The dispatcher at the dispatch center drafts a temporary speed limit dispatch order and enters the relevant control parameters through the dispatch terminal. During the drafting process, the dispatcher confirms the correctness of the control parameters and sends them to the CTC / TDCS stations at all TSRC stations within the dispatch area. After receiving the temporary speed limit dispatch order, the CTC / TDCS station sends it to the connected TSRC and feedbacks the dispatch order receipt result to the dispatch center. After successfully receiving the dispatch command, the TSRC automatically encodes it in real time according to the transponder encoding specification, generates a transponder temporary speed limit disclosure message and sends it to the enhanced LEU, and feeds back the dispatch command reception result to the CTC / TDCS station machine; The enhanced LEU directly sends the received temporary speed limit disclosure message through the C interface to control the active balise at the station entrance / exit. When the train passes the balise, it receives the temporary speed limit disclosure message through the BTM, decodes the user message, and sends the temporary speed limit disclosure message according to the request of the enhanced LKJ. After receiving the disclosure message, the enhanced LKJ parses and stores the temporary speed limit information, and performs temporary speed limit monitoring according to the speed limit area, speed limit time and speed limit value in the speed limit information.

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