CN117002579A

CN117002579A - Dynamic loading method, equipment and medium for continuous train data

Info

Publication number: CN117002579A
Application number: CN202310915652.7A
Authority: CN
Inventors: 黄佳禾; 王许超; 胡金根; 杨镇源; 郑勇; 吕新军; 常鸣
Original assignee: Casco Signal Ltd
Current assignee: Casco Signal Ltd
Priority date: 2023-07-25
Filing date: 2023-07-25
Publication date: 2023-11-07

Abstract

The invention relates to a dynamic loading method, equipment and medium for data of a train connected with a train, wherein the method comprises the following steps: s1, when the main program triggers offline data loading, if the scene is a scene of initialization of the train loading system when the train is just on, turning to S2; if the scene is a train connection and disconnection stage, turning to S3; if the scene is a train crossing stage, turning to S4; s2, the main program reads a cache file recorded in a hard disk when the train is electrified last time; s3, when the train is connected or disconnected, the main program of the train at the home end establishes communication with the main program of the train at the other end through data connection, obtains the train number of the opposite side and updates the train connection state; s4, when the line is crossed, the main program predicts whether another line is about to be opened or not by positioning the map position of the train, so as to calculate the line number to be loaded; s5, the main program selects a corresponding configuration file in the hard disk and dynamically loads the configuration file into the program. Compared with the prior art, the method has the advantages of improving the program running efficiency and the like.

Description

Dynamic loading method, equipment and medium for continuous train data

Technical Field

The invention relates to a train signal control system, in particular to a method, equipment and medium for dynamically loading data of a train connected with a train.

Background

During operation of the train automatic control system (Communication Based Train Control System, CBTC system), there is an energy-saving solution: flexible grouping. The passenger flow peak period can be operated with low density by using low-group (such as 3-group train), and the passenger flow peak period can be operated with high density by using high-group (such as 3+3 link group), so that the operation mode can be better suitable for passenger flow in different periods, the idle rate of the train is reduced, and the operation cost is reduced.

However, in the process of connecting and hanging, the parameters of the high-consist trains need to be recalculated by combining two-train data. Such as recalculating the train safety envelope, recalculating the train door to platform door association, recalculating the train energy to braking distance, etc. If the vehicle-mounted control system only uses the parameters of a single train in the continuous train to calculate data, the error judgment can be carried out due to the physical property change brought by other marshalling trains, and the safety of the train is further affected.

Therefore, how to overcome the defects, so that the program running efficiency is improved when the program is hung and unwound or the train is jumped, and the technical problem to be solved is solved.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a method, equipment and medium for dynamically loading the data of the train in a connecting way.

The aim of the invention can be achieved by the following technical scheme:

according to a first aspect of the present invention, there is provided a method of dynamic loading of linked train data, the method comprising the steps of:

step S1, when the main program triggers offline data loading, if the scene is a scene of initialization of the system for starting the train on the train, turning to step S2; if the scene is a train connection and disconnection stage, turning to step S3; if the scene is a train crossing stage, turning to step S4;

step S2, the main program reads a cache file recorded in a hard disk when the train is electrified last time, and step S5 is executed;

step S3, when the train is connected or disconnected, the main program of the train at the home end establishes communication with the main program of the train at the other end through data connection, obtains the train number of the opposite side, updates the train connection state, and executes step S5;

step S4, when crossing the line, the main program predicts whether the train is about to start to another line by locating the map position of the train, thereby calculating the line number to be loaded, and executing step S5;

step S5, the main program selects a corresponding configuration file in the hard disk according to the train number, the train connection state and the line number of the local end, and dynamically loads the configuration file into the program;

step S6, if the loading is successful, ending the loading flow; if the loading fails, the loading flow is ended after the failure information is returned.

As an preferable technical scheme, the buffer file in step S2 records the train number, the line number and the train connection state of the home terminal.

As an preferable technical solution, in the step S3, the number of the train and the line number at the home end are maintained unchanged.

As a preferred technical solution, the communication establishment in step S3 includes an electrical coupler connection, an indirect communication through the vehicles at both ends connecting to the same trackside equipment, and a direct communication through the vehicles at both ends connecting to the same lan.

In the step S4, the number of the train at the home end and the train connection state are maintained while the parameters being used are unchanged.

As a preferable technical scheme, the specific process of step S5 is as follows:

step S51, after the configuration file to be loaded is selected by using the train number, the train connection state and the line number of the local end, checking whether other modules exist in the memory, if yes, turning to step S52, otherwise turning to step S54;

step S52, checking whether the existing module in the memory is needed, if so, turning to step S53, otherwise, unloading the existing module, and turning to step S54;

step S53, attempting to open up a new memory space for the module to be loaded, if yes, turning to step S54, otherwise turning to step S57;

step S54, loading the offline data of the configuration file into a virtual file system of the memory, if successful, turning to step S55, otherwise turning to step S57;

step S55, carrying out safety verification on the loaded offline data, if successful, turning to step S56, otherwise turning to step S57;

step S56, loading is successful, and the loading flow is ended;

and step S57, loading fails, failure information is returned, and the loading flow is ended.

As a preferred technical solution, the offline data in step S54 includes an electronic map, train parameters, train configurable logic and communication parameters.

As an preferable technical scheme, when the offline data is an electronic map, the main program uses the maps of two lines at the same time, namely, more than two electronic map modules are loaded in the memory, so as to achieve seamless switching when the train crosses a line, and if the main program cannot find the configuration file of the corresponding line number in the hard disk, the main program tries to update the configuration file from the trackside equipment.

As an optimal technical scheme, when the offline data is train parameters, the main program simultaneously uses two train parameter modules, wherein the first module is a train parameter module which is not connected, connected 1, connected 2 and the like, and the second module is fixed as a safety parameter module which is not known to be connected.

As a preferable technical scheme, the train configurable logic comprises emergency escape related logic, fault detection logic, cab control logic and connection state calculation logic, and is loaded when being initialized through a main program.

As a preferable technical scheme, the communication parameters comprise a secure encryption parameter and a data verification parameter of an RSSP1 protocol, an RSSP2 protocol and a SACEM protocol, and are loaded when initialized through a main program.

According to a second aspect of the present invention there is provided an electronic device comprising a memory and a processor, the memory having stored thereon a computer program, the processor implementing the method when executing the program.

According to a third aspect of the present invention, there is provided a computer readable storage medium having stored thereon a computer program which when executed by a processor implements the method.

Compared with the prior art, the invention has the following advantages:

1) The invention can improve the reusability of the software main program. On the basis that the main program meets the two different functions of continuous running and overline running, trains with different projects can use the same main program and different configuration files. I.e. using different maps, train parameters, configurable operating logic, etc.

2) The present invention uses a modular development approach to reduce the coupling. The files of the vehicle-mounted software main program, the electronic map module, the train parameter module and the like are mutually independent, and maintenance personnel and development personnel can work respectively, so that development cost is reduced.

3) The invention improves the program running efficiency. The dynamic loading technology enables the main program to be free from restarting, and the loaded process is placed in a background task. When the train crosses the line, the main program uses two lines in the memory to perform seamless switching. When the train is linked and unbundled, the main program can firstly use unknown linking safety parameters, load new linking state parameters after unloading, and switch back after loading is finished, so as to achieve the effect of seamless switching.

4) The invention only reads the memory from the hard disk when a certain configuration file is needed. And when the configuration is no longer needed, it can be unloaded from memory and the memory space reclaimed. The process can save the memory and reduce the hardware cost.

5) The invention enhances the usability of the vehicle-mounted controller software. When the vehicle-mounted main program cannot find the relevant configuration, the vehicle-mounted main program can go to the trackside to request downloading and updating; when the main program can not identify the connection state, the use safety parameters can be switched. The method ensures driving safety, and improves the robustness of the main program in coping with faults, so that the program is prevented from being down and the emergency braking of the vehicle is prevented.

Drawings

FIG. 1 is a flow chart of the dynamic loading of configuration files according to the present invention;

FIG. 2 is a flow chart of a specific process for dynamic loading of configuration files according to the present invention;

FIG. 3 is a schematic diagram of four profile types and storage modes thereof according to the present invention;

FIG. 4 is a flow chart of the loading process of two train parameters in two scenarios according to the present invention;

fig. 5 is a schematic diagram of a loading manner of a main program for acquiring a configuration file through a trackside according to the present invention.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.

The software of the vehicle-mounted control system of the invention uses dynamic loading technology (dynamic loading). The dynamic loading is characterized in that the data in the storage medium is transferred to the virtual file system in the memory only when the running module is needed, and the main program can analyze through the virtual file system address when the main program needs to call the function. The module may then be incorporated into the system to operate as a whole. Therefore, when the train is connected and disconnected (when the train needs to reload train parameters) or when the train is crossing (when the train map needs to be reloaded), dynamic loading is a feasible solution to achieve the aim of improving the running efficiency.

Referring first to fig. 1, a triggering manner of loading a software configuration file of a vehicle-mounted controller according to the present invention is described:

step S1, judging the current scene when the main program triggers offline data loading. If the scene is the initial scene of the train on-board train loading system start, the step S2 is shifted. If the scene is a train connection and disconnection stage, turning to step S3. If the scene is the train crossing stage, turning to step S4.

Step S2, during initialization, the main program reads the cache file recorded in the hard disk when the train is electrified last time. The buffer file records the serial number of the train at the home end, the line number and the train connection state, and then the step S5 is carried out.

And S3, when the train is hung or unfolded, the main program of the train at the local end can establish communication with the main program of the train at the other end through data connection. And obtaining the train number of the opposite side, and then updating the train connection and disconnection state. The number of the train and the line number at the home terminal are maintained unchanged. The communication establishing method includes two redundant modes of indirect communication through the vehicles at two ends connected with the same trackside equipment and direct communication through the vehicles at two ends connected with the same local area network besides the traditional electric coupler connection, and then the step S5 is performed.

And S4, when the line is crossed, the main program predicts whether another line is about to be started or not by positioning the map position of the train, so as to calculate the line number to be loaded. The number of the train at the home end and the train connection state are maintained to be unchanged, and then the step S5 is carried out.

And S5, the main program selects a corresponding configuration file in the hard disk according to the train number, the train connection state and the line number of the local end, and loads the configuration file into the program.

And S6, finishing loading. If the main program is loaded successfully, the offline data is directly switched to operate without restarting.

The step S5 is described in detail with reference to fig. 2, and the flow of dynamically loading the configuration file by the vehicle-mounted controller software is shown in fig. 2, specifically:

and S51, checking whether other modules exist in the memory after the configuration file to be loaded is selected by using the number, the train connection state and the line number of the local end. If yes, the process goes to step S52. Otherwise go to step S54.

Step S52, checking whether the existing module in the memory is needed. If necessary, go to step S53. If no, the existing module is unloaded, and the process goes to step S54.

Step S53, attempting to open up a new memory space for the module to be loaded. Step S54 is successfully performed. If the failure occurs, the process goes to step S57.

And step S54, loading the content of the configuration file into a virtual file system in the memory. The offline data comprises an electronic map, train parameters, train configurable logic, communication parameters and the like. If successful, the process goes to step S55. If the failure occurs, the process goes to step S57.

In step S55, the loaded offline data is subjected to security verification. And successfully goes to step S56. If the failure occurs, the process goes to step S57.

Step S56, the loading is successful, and the loading flow is ended.

Four different profile types of offline data are mentioned in step S54, which will be described in detail with reference to fig. 3. The following is a storage mode in a hard disk and a memory:

1) And the electronic map module is used for: the main program dynamically loads the corresponding files in the hard disk into the memory according to the line number. The map file data comprises related parameters such as trackside equipment, linkage equipment, turnouts, stations, beacons and the like. The main program uses the maps of two lines at the same time, namely more than two electronic map modules can be loaded in the memory, so as to achieve seamless switching when the train crosses the line. For example, the train is powered up from line a, the main program should load the line a map during the initialization phase. Then the train is going to be started from the line A to the line B, the main program should be using the map data of the line A, and the data of the line B is dynamically loaded into the memory by the background. And then the train continues to run and starts from the line B to the line C, the main program releases the memory space from the unloading line A, and then dynamically loads the line C data to the memory. The above operations are seamlessly switched in the normal operation of the train. If the host program fails to find the corresponding line number profile in the hard disk, it will attempt to update the profile from the trackside device.

2) And a train parameter module: the train parameter data includes train speed protection, brake curve, antenna position, positioning parameters, etc. The main program needs to use two train parameter modules at the same time. The first module may be a train parameter module such as a non-hitch, a hitch 1, a hitch 2, etc., while the second module is fixed as a security parameter module of an unknown hitch, and the loading logic is as shown in fig. 4. When the train is in the link-up and link-down editing mode, the main program will acquire the current link-up state, dynamically load the corresponding file in the hard disk into the memory, the loading process operates in the background of the train in normal operation, and the train parameters of the first module will be preferentially used by the vehicle-mounted controller. If the main program fails to find the corresponding train parameter profile in the hard disk, the parameters of the second module will be used first and an attempt will be made to update the profile from the trackside device. The second module is loaded into memory at power-up initialization of the main program, and the scene of the use is that when the train recognizes an unknown connection state (for example, an unknown vehicle is connected) or the first module is executing a loading and unloading process, the main program immediately switches the safety parameters of the module. Generally, the unknown link has a larger safety envelope than other link modes, and more strict overspeed protection is performed to ensure the safety of controlling the guiding of the train.

3) Train configurable logic module: and the main program dynamically loads the corresponding files in the hard disk into the memory according to the train number. The configurable logic includes emergency escape related logic, fault detection logic, cab control logic, link state calculation logic, and the like. This loading process is loaded at the initialization of the main program.

4) And a communication parameter module: and the main program dynamically loads the corresponding files in the hard disk into the memory according to the train number. The communication parameters comprise RSSP1 protocol, RSSP2 protocol, secure encryption parameters and data verification parameters of SACEM protocol. This loading process is loaded at the initialization of the main program.

The above-mentioned electronic map module and train parameter module describe a method for updating configuration data by the trackside apparatus, and will be described in detail with reference to fig. 5 below:

a) When the main program of the vehicle-mounted controller cannot find the configuration file to be loaded in the hard disk, the main program can send a UDP network packet for inquiring the configuration to the trackside equipment. The configuration query packet includes a line number, a link state number, a manufacturer number and a version number of the main program mirror image, and the like.

b) After receiving the query packet, the track side device searches the FTP server of the track side data storage unit for whether the configuration file is contained. If so, the trackside device will establish an FTP data connection with the main program and send the file.

c) The main program will directly place the transmitted file in the memory, i.e. directly load the module into the corresponding memory space. And simultaneously, the main program continuously replies the downloading progress to the trackside.

d) And after the file transmission is finished, the main program sends an update state list back to the trackside equipment, and carries out security decryption verification and file verification on the received data. If the verification is passed, the main program judges that the received data is effective and reliable, and the offline data can be used in a switching way.

It should be understood that the profile loading process described in this invention may be implemented as software running on each unit on the train on-board controller. For example, the invention may be implemented as a process data program code in an automatic protection unit ATP. The offline data included in the configuration file includes, but is not limited to, route maps, train parameters, train connection parameters, configurable logic, communication data, etc. Configuration files and images in the train-mounted controller can be transmitted and updated in a mode of accessing a local area network of the train-mounted switch, a U disk, a trackside network and the like.

The data connection mode between the train units can be realized by but not limited to local area network, trackside communication, linkage communication, train electric coupler and the like. The above may be modified differently according to different items by those skilled in the art.

It should be appreciated that the present invention also describes a way for the trackside and on-board control systems of the train to interact, where the software on the trackside contains code that can perform this function.

The foregoing description of the embodiments of the method further describes the embodiments of the present invention through embodiments of the electronic device and the storage medium.

The electronic device of the present invention includes a Central Processing Unit (CPU) that can perform various appropriate actions and processes according to computer program instructions stored in a Read Only Memory (ROM) or computer program instructions loaded from a storage unit into a Random Access Memory (RAM). In the RAM, various programs and data required for the operation of the device can also be stored. The CPU, ROM and RAM are connected to each other by a bus. An input/output (I/O) interface is also connected to the bus.

A plurality of components in a device are connected to an I/O interface, comprising: an input unit such as a keyboard, a mouse, etc.; an output unit such as various types of displays, speakers, and the like; a storage unit such as a magnetic disk, an optical disk, or the like; and communication units such as network cards, modems, wireless communication transceivers, and the like. The communication unit allows the device to exchange information/data with other devices via a computer network, such as the internet, and/or various telecommunication networks.

The processing unit performs the respective methods and processes described above, for example, the methods S1 to S6. For example, in some embodiments, methods S1-S6 may be implemented as a computer software program tangibly embodied on a machine-readable medium, such as a storage unit. In some embodiments, part or all of the computer program may be loaded and/or installed onto the device via the ROM and/or the communication unit. When the computer program is loaded into RAM and executed by the CPU, one or more steps of the methods S1 to S6 described above may be performed. Alternatively, in other embodiments, the CPU may be configured to perform methods S1-S6 in any other suitable manner (e.g., by means of firmware).

The functions described above herein may be performed, at least in part, by one or more hardware logic components. For example, without limitation, exemplary types of hardware logic components that may be used include: a Field Programmable Gate Array (FPGA), an Application Specific Integrated Circuit (ASIC), an Application Specific Standard Product (ASSP), a system on a chip (SOC), a Complex Programmable Logic Device (CPLD), and the like.

Program code for carrying out methods of the present invention may be written in any combination of one or more programming languages. These program code may be provided to a processor or controller of a general purpose computer, special purpose computer, or other programmable data processing apparatus such that the program code, when executed by the processor or controller, causes the functions/operations specified in the flowchart and/or block diagram to be implemented. The program code may execute entirely on the machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.

In the context of the present invention, a machine-readable medium may be a tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. The machine-readable medium may be a machine-readable signal medium or a machine-readable storage medium. The machine-readable medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. More specific examples of a machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

While the invention has been described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes and substitutions of equivalents may be made and equivalents will be apparent to those skilled in the art without departing from the scope of the invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.

Claims

1. The dynamic loading method of the train data of the link is characterized by comprising the following steps:

2. The method for dynamically loading train data in tandem according to claim 1, wherein the buffer file in step S2 records the serial number, the line number and the train in tandem state of the host.

3. The method for dynamically loading the train data of the train on a train link according to claim 1, wherein in the step S3, the number of the train on the home terminal and the line number are maintained unchanged.

4. The method according to claim 1, wherein the step S3 of establishing communication includes an electrical coupler connection, indirect communication through two-end vehicles connected to the same trackside equipment, and direct communication through two-end vehicles connected to the same lan.

5. The method for dynamically loading train data in tandem according to claim 1, wherein in step S4, the number of the train at the home end and the status of the train in tandem are maintained unchanged.

6. The method for dynamically loading the train data in the train connection according to claim 1, wherein the specific process of step S5 is as follows:

step S56, loading is successful, and the loading flow is ended;

7. The method according to claim 6, wherein the offline data in step S54 includes an electronic map, train parameters, train configurable logic and communication parameters.

8. The method for dynamically loading train data in connection with train as set forth in claim 7, wherein when the offline data is an electronic map, the main program uses two line maps simultaneously, i.e. more than two electronic map modules are loaded in the memory, so as to achieve seamless switching when the train crosses the line, and if the main program fails to find the corresponding line number configuration file in the hard disk, it will attempt to update the configuration file from the trackside equipment.

9. The method of claim 7, wherein for the case where the offline data is a train parameter, two train parameter modules are used simultaneously by the main program, the first module is a train parameter module of the non-connected, connected 1, connected 2, and the second module is a security parameter module of the unknown connected.

10. The method for dynamically loading train data in tandem according to claim 7, wherein the train configurable logic includes emergency escape related logic, fault detection logic, cab control logic, and train status calculation logic, which are loaded upon initialization by a main program.

11. The method for dynamically loading train data in tandem according to claim 7, wherein the communication parameters include a RSSP1 protocol, a RSSP2 protocol, a SACEM protocol, and a data verification parameter, and are loaded by a main program during initialization.

12. An electronic device comprising a memory and a processor, the memory having stored thereon a computer program, characterized in that the processor, when executing the program, implements the method of any of claims 1-11.

13. A computer readable storage medium, on which a computer program is stored, characterized in that the program, when being executed by a processor, implements the method according to any one of claims 1-11.