Display method and device of DMI equipment

Abstract

The invention provides a DMI equipment display method and device, the DMI equipment display method and device are applied to DMI equipment, the DMI equipment is connected with ATP hosts in a plurality of train control vehicle-mounted systems through a communication bus, the DMI equipment display method comprises the steps that the DMI equipment serves as master equipment, the ATP hosts serve as slave equipment, and the ATP hosts are polled based on a master-slave polling mechanism; when reply data returned by any ATP host is received, information to be displayed is extracted from the reply data; and displaying the to-be-displayed information. In the scheme, the existing master-slave communication relationship between the train control vehicle-mounted system and the DMI equipment is changed into the communication relationship that the DMI equipment is the master equipment and the train control vehicle-mounted system is the slave equipment, so that the communication with a plurality of sets of train control vehicle-mounted systems is realized, and the purpose of saving the cost is further realized.

Description

Technical Field

[0001] The present invention relates to the field of rail transit technology, and in particular to a display method and device for a DMI device. Background Art

[0002] In the field of rail transit, DMI (Driver Machine Interface) is a key technology used to realize the interaction between train drivers and train control on-board systems (ATP). DMI equipment is used to provide train drivers with necessary displays, data input and operations, and provide drivers with auxiliary driving information. Its main functions include display of train speed, mode, text, warning information display (warning time, target distance information), equipment status display (train control on-board equipment operating level, equipment braking information), train data input, and voice prompts.

[0003] Currently, one DMI device in an EMU train corresponds to only one train control onboard system and cannot support multiple train control onboard systems at the same time. For multiple train control onboard systems, multiple DMI devices need to be set up, which is costly. Summary of the invention

[0004] In view of this, an embodiment of the present invention provides a display method and apparatus for a DMI device to achieve communication with multiple train control on-board systems, thereby achieving the purpose of cost saving.

[0005] To achieve the above objectives, the embodiments of the present invention provide the following technical solutions:

[0006] A first aspect of an embodiment of the present invention discloses a display method for a DMI device, which is applied to a DMI device, wherein the DMI device and an ATP host in a plurality of train control vehicle systems are connected via a communication bus, and the method comprises:

[0007] Taking the DMI device as the master device and each of the ATP hosts as the slave devices, polling each of the ATP hosts based on a master-slave polling mechanism;

[0008] When receiving reply data returned by any of the ATP hosts, extracting information to be displayed from the reply data;

[0009] The information to be displayed is displayed.

[0010] Preferably, the method of using the DMI device as a master device and each of the ATP hosts as a slave device, and polling each of the ATP hosts based on a master-slave polling mechanism, includes:

[0011] For each of the ATP hosts, polling data carrying address information is sent at intervals of a preset duration, so that when the address information matches the address of the train control on-board system corresponding to the ATP host, the ATP host returns reply data carrying information to be displayed.

[0012] Preferably, the DMI device is provided with a first communication port and a second communication port;

[0013] Accordingly, for each of the ATP hosts, polling data carrying address information is sent at a preset interval, so that when the address information matches the address of the train control on-board system corresponding to the ATP host, the ATP host returns reply data carrying information to be displayed, including:

[0014] Determine an available target communication port from the first communication port and the second communication port;

[0015] For each of the ATP hosts, polling data carrying address information is sent through the target communication port at intervals of a preset duration, so that when the address information matches the address of the train control on-board system corresponding to the ATP host, the ATP host returns reply data carrying information to be displayed through the target communication port.

[0016] Preferably, the displaying the information to be displayed includes:

[0017] Determine the vehicle control object from the train control onboard system corresponding to each of the ATP hosts;

[0018] The display interface corresponding to the vehicle control object is displayed based on a preset logic, and the information to be displayed extracted from the reply data returned by the vehicle control object is displayed in the display interface.

[0019] Preferably, the method further comprises:

[0020] When a user selects a vehicle control object from a plurality of the train control onboard systems, access data is generated based on the address of the vehicle control object, and the access data is sent to an ATP host corresponding to the vehicle control object;

[0021] Receive target response data returned by the ATP host corresponding to the vehicle control object, and extract target information to be displayed from the target response data;

[0022] The display interface corresponding to the vehicle control object is displayed based on the preset logic, and the target information to be displayed is displayed in the display interface.

[0023] A second aspect of an embodiment of the present invention discloses a display device for a DMI device, which is applied to a DMI device. The DMI device and an ATP host in a plurality of train control vehicle systems are connected via a communication bus. The device includes:

[0024] A polling unit, configured to use the DMI device as a master device and each of the ATP hosts as a slave device, and poll each of the ATP hosts based on a master-slave polling mechanism;

[0025] A receiving unit, configured to extract information to be displayed from the reply data when receiving reply data returned by any of the ATP hosts;

[0026] The display unit is used to display the information to be displayed.

[0027] Preferably, the polling unit is specifically used for:

[0028] For each of the ATP hosts, polling data carrying address information is sent at intervals of a preset duration, so that when the address information matches the address of the train control on-board system corresponding to the ATP host, the ATP host returns reply data carrying information to be displayed.

[0029] Preferably, the DMI device is provided with a first communication port and a second communication port;

[0030] Accordingly, the polling unit is specifically used for:

[0031] Determine an available target communication port from the first communication port and the second communication port;

[0032] For each of the ATP hosts, polling data carrying address information is sent through the target communication port at intervals of a preset duration, so that when the address information matches the address of the train control on-board system corresponding to the ATP host, the ATP host returns reply data carrying information to be displayed through the target communication port.

[0033] Preferably, the display unit is specifically used for:

[0034] Determine the vehicle control object from the train control onboard system corresponding to each of the ATP hosts;

[0035] The display interface corresponding to the vehicle control object is displayed based on a preset logic, and the information to be displayed extracted from the reply data returned by the vehicle control object is displayed in the display interface.

[0036] Preferably, the device further comprises:

[0037] A switching unit, used for generating access data based on the address of the vehicle control object when a user selects a vehicle control object from a plurality of the train control vehicle-mounted systems, and sending the access data to an ATP host corresponding to the vehicle control object;

[0038] Receive target response data returned by the ATP host corresponding to the vehicle control object, and extract target information to be displayed from the target response data;

[0039] The display interface corresponding to the vehicle control object is displayed based on the preset logic, and the target information to be displayed is displayed in the display interface.

[0040] A display method and apparatus for a DMI device provided based on the above-mentioned embodiment of the present invention is applied to a DMI device, wherein the DMI device and the ATP hosts in multiple train control on-board systems are connected via a communication bus, and the method includes: taking the DMI device as the master device and each of the ATP hosts as the slave device, and polling each of the ATP hosts based on a master-slave polling mechanism; when receiving reply data returned by any of the ATP hosts, extracting information to be displayed from the reply data; and displaying the information to be displayed. In this solution, the existing master-slave communication relationship between the train control on-board system and the DMI device is changed to a communication relationship in which the DMI device is the master device and the train control on-board system is the slave device, thereby realizing communication with multiple train control on-board systems and achieving the purpose of cost saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0042] Figure 1 An architectural diagram of a display system of a DMI device disclosed in an embodiment of the present invention;

[0043] Figure 2 A flow chart of a display method of a DMI device disclosed in an embodiment of the present invention;

[0044] Figure 3 A flow chart of a method for switching a display interface of a DMI device disclosed in an embodiment of the present invention;

[0045] Figure 4 The present invention is a structural diagram of a display device of a DMI device disclosed in an embodiment of the present invention. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments 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 creative work are within the scope of protection of the present invention.

[0047] In this application, the terms "comprises", "comprising" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0048] As can be seen from the background technology, currently in an EMU train, one DMI device only corresponds to one train control onboard system and cannot support multiple train control onboard systems at the same time. For multiple train control onboard systems, multiple DMI devices need to be set up, which is costly.

[0049] Therefore, an embodiment of the present invention discloses a display method and device for a DMI device. In this solution, the master-slave communication relationship between the existing train control on-board system and the DMI device is changed to a communication relationship in which the DMI device is the master device and the train control on-board system is the slave device, thereby realizing communication with multiple train control on-board systems and achieving the purpose of cost saving.

[0050] like Figure 1 , which is an architecture diagram of a display system of a DMI device disclosed in an embodiment of the present invention.

[0051] In the embodiments of the present invention, two types of train control systems are used as examples. CTCS (China Train Control System) is a technical system built by China Railway with reference to the European train control system and combined with China's national conditions. ‌CBTC (Communication Based Train Control System) is used in China's high-speed railways, while CBTC is used in urban rails (subways).

[0052] exist Figure 1 In this document, CTCS refers to the ATP (Automatic Train Protection) host of the CTCS3-400H train control onboard system; CBTC refers to the ATP host of the CBTC-standard train control onboard system.

[0053] DMI (Driver Machine Interface) is the interface for the driver to interact with the train control system. The device used to display the driver interface is the DMI device.

[0054] TXD / RXD: These are signals on the communication line, TXD stands for Transmit Data, and RXD stands for Receive Data. They indicate the direction of data transmission between different components.

[0055] It should be noted that the ATP host of CTCS, the ATP host of CBTC and the DMI device are connected to the same communication bus, and data is transmitted between the ATP host of CTCS, the ATP host of CBTC and the DMI device through the communication bus.

[0056] Specifically, Figure 1 The arrows in the figure indicate the direction of data transfer:

[0057] There is two-way communication between CTCS and DMI devices. CTCS can send (TXD) and receive (RXD) data to DMI devices.

[0058] There is also two-way communication between the DMI device and CBTC, and data is also sent and received through TXD and RXD.

[0059] CTCS and CBTC exchange data through inter-system communication.

[0060] In an embodiment of the present invention, the DMI device is used as the master device, and the ATP host of CTCS and the ATP host of CBTC are used as slave devices. The DMI device implements communication with multiple train control on-board systems in accordance with the master-slave polling mechanism, ensures correct interaction with multiple train control on-board systems, determines the current vehicle control object according to the reply data of the train control on-board system, automatically switches the display interface of the DMI device according to the current vehicle control object, and displays the data to be displayed in the reply data in the display interface.

[0061] Based on the display system of a DMI device disclosed in the above embodiment of the present invention, Figure 2 As shown, it is a flow chart of a display method of a DMI device disclosed in an embodiment of the present invention. The display method of the DMI device is applied to the DMI device. The DMI device and the ATP host in multiple train control vehicle systems are connected through a communication bus. The display method of the DMI device includes the following steps:

[0062] Step S101: Taking the DMI device as the master device and each ATP host as the slave device, polling each ATP host based on the master-slave polling mechanism.

[0063] It should be noted that the master-slave polling mechanism is a communication method that is usually used for data exchange between devices. In this mechanism, there is a master device and multiple slave devices. The master device is responsible for actively sending requests (polling) to each slave device to query their status or obtain data. After receiving the request from the master device, the slave device will respond and send the required information back to the master device.

[0064] Here is how the master-slave polling mechanism works:

[0065] Master device sends request: The master device queries the status of the slave device or obtains data by sending a request command. The request command includes information such as the slave device address, function code, and data address.

[0066] Slave device response: After receiving the request, the slave device performs corresponding processing according to the command. The slave device encapsulates the processing result into a response message and returns it to the master device.

[0067] Master device parses response: After receiving the response message from the slave device, the master device parses it. The master device extracts the required information based on the data in the response message and performs corresponding processing.

[0068] Control of polling cycle: The master device sets the polling cycle according to actual needs. The polling cycle determines the frequency at which the master device queries the slave device. A cycle that is too long may result in low real-time performance, while a cycle that is too short may result in excessive communication load.

[0069] In the specific implementation process of step S101, for each ATP host, polling data (equivalent to a request command) carrying address information is sent at a preset interval, so that when the address information matches the address of the train control on-board system corresponding to the ATP host, the ATP host returns reply data (equivalent to a response message) carrying information to be displayed.

[0070] It is understandable that the address information in the polling data changes at a preset time interval to obtain the reply data from each ATP host. When finally displayed, only the data to be displayed in the latest reply data of one of the ATP hosts is displayed. The specific data to be displayed in the latest reply data of which ATP host is displayed is determined by the vehicle control object.

[0071] It should be noted that the DMI device is used as the display of the ATP host of the train control on-board system, and is used to display key information of the ATP system such as train speed and braking status. Normally, a DMI device can only provide a display of ATP host information.

[0072] In this solution, one DMI device needs to provide display of information of multiple (i.e. at least two) ATP hosts. Since the DMI device and the two ATP hosts are connected to one communication bus, in order to prevent the two ATP hosts from sending data to the DMI device at the same time and causing packet collision, the DMI device actively sends polling data to the ATP host for polling.

[0073] Exemplarily, according to the communication protocol, if the address information in the polling data sent by the DMI device is CTCS, the ATP host of CTCS returns reply data to the DMI device. If the address information in the polling data sent by the DMI device is CBTC, the ATP host of CBTC returns reply data to the DMI device.

[0074] Preferably, the timing of sending the polling data is controlled by a timer, that is, the polling data is sent at preset intervals to ensure that the data will not interfere with each other when reply data is received from the ATP host.

[0075] It should be noted that the DMI device and each ATP master sentence use HDLC (High-Level Data Link Control) to communicate, and the physical layer is 422 (i.e. RS-422 standard). According to the communication protocol, if the address information in the polling data sent by the DMI device is CTCS, the ATP master sentence of CTCS returns the reply data to the DMI device. If the address information in the polling data sent by the DMI device is CBTC, the ATP host of CBTC returns the reply data to the DMI device, so that there will be no mutual interference.

[0076] In one embodiment, the train control onboard system adopts a parallel dual redundant architecture, and the DMI device has two communication ports (a first communication port COMA and a second communication port COMB), which are respectively connected to the two systems of the train control onboard system. The two systems of the train control onboard system refer to two redundant systems inside the train control onboard system. Each system usually includes independent hardware, software and communication paths, so that even if one system fails, the other system can still maintain normal control and operation of the train.

[0077] It should be noted that the use of a parallel dual redundant architecture means that there are two independent communication modules inside the DMI device. These two communication modules back up each other and work independently but simultaneously, ensuring that even if one of the communication modules has a problem, the other can still maintain the normal operation of the DMI device.

[0078] Specifically, determining an available target communication port from the first communication port and the second communication port;

[0079] For each ATP host, polling data carrying address information is sent through the target communication port at preset intervals, so that when the address information matches the address of the train control on-board system corresponding to the ATP host, the ATP host returns reply data carrying information to be displayed through the target communication port.

[0080] Step S102: When reply data returned by any ATP host is received, the information to be displayed is extracted from the reply data.

[0081] In step S102, the information to be displayed may be key information of the ATP system such as train speed and braking status.

[0082] Step S103: Display the information to be displayed.

[0083] In the specific implementation process of step S103, after the DMI device is powered on and started, it will perform a series of initialization operations, including constructing a corresponding display interface according to the current configuration and preset parameters to ensure that it can quickly adapt to different vehicle models and configurations.

[0084] Then, the train control object is determined from the train control onboard system corresponding to each ATP host; the display interface corresponding to the train control object is displayed based on the preset logic, and the information to be displayed extracted from the reply data returned by the train control object is displayed in the display interface.

[0085] It should be noted that the vehicle control object can be determined from the reply data returned by the ATP host, or the vehicle control object can be specified by the user. Among them, since polling will obtain the reply data returned by each ATP host, the information to be displayed extracted from the reply data returned by the vehicle control object is displayed in the display interface, and the latest information to be displayed is displayed.

[0086] It is understandable that the data to be displayed returned by the ATP hosts of different train control systems are inconsistent, so there are corresponding preset logics for different ATP hosts to switch the display interface to match the data to be displayed. This automatic switching mechanism enables the driver to quickly obtain the most critical information.

[0087] It should be noted that both CBTC and CTCS have clear specifications for the display interface of DMI devices. For example, the content and icons displayed in each area on the DMI device. In this solution, only one of the ATP hosts is in the vehicle control state (foreground), and the rest of the ATP hosts run in the background. The ATP host sends the vehicle control state to the DMI device through reply data.

[0088] For example, if the vehicle is controlled by CBTC, the DMI device will display the display interface in accordance with the display specifications of the CBTC system; if the vehicle is controlled by CTCS, the DMI device will display the display interface in accordance with the display specifications of the CTCS system.

[0089] In one embodiment, the DMI device also provides a function of actively selecting a vehicle control object and switching a display interface, and the driver can switch to a corresponding display interface as needed.

[0090] like Figure 3 FIG. 1 is a flow chart of a method for switching a DMI device display interface disclosed in an embodiment of the present invention, which mainly includes the following steps:

[0091] Step S201: When a user selects a vehicle control object from multiple train control onboard systems, access data is generated based on the address of the vehicle control object, and the access data is sent to an ATP host corresponding to the vehicle control object.

[0092] In step S201, the user may select a vehicle control object from a plurality of train control vehicle systems through a DMI device, for example, by clicking to select from a list of a plurality of train control vehicle systems.

[0093] In the embodiment of the present invention, since the reply data obtained by polling cannot meet the high timeliness requirement, the current reply data can be obtained by sending access data.

[0094] Step S202: receiving target response data returned by the ATP host corresponding to the vehicle control object, and extracting target information to be displayed from the target response data.

[0095] Step S203: displaying a display interface corresponding to the vehicle control object based on a preset logic, and displaying target information to be displayed in the display interface.

[0096] A display method for a DMI device disclosed in the above-mentioned embodiment of the present invention is applied to the DMI device, and the DMI device and the ATP hosts in multiple train control vehicle systems are connected via a communication bus. The method includes: taking the DMI device as the master device and each ATP host as a slave device, and polling each ATP host based on a master-slave polling mechanism; when receiving reply data returned by any ATP host, extracting the information to be displayed from the reply data; and displaying the information to be displayed. In this solution, the existing master-slave communication relationship between the train control vehicle system and the DMI device is changed to a communication relationship in which the DMI device is the master device and the train control vehicle system is the slave device, so as to realize communication with multiple train control vehicle systems and thereby achieve the purpose of cost saving.

[0097] Corresponding to the display method of a DMI device disclosed in the above embodiment of the present invention, as Figure 4As shown, it is a structural diagram of a display device of a DMI device disclosed in an embodiment of the present invention. The display device of the DMI device is applied to the DMI device. The DMI device and the ATP host in multiple train control vehicle systems are connected through a communication bus. The display device of the DMI device includes: a polling unit 401, a receiving unit 402 and a display unit 403.

[0098] The polling unit 401 is used to use the DMI device as a master device and each ATP host as a slave device, and poll each ATP host based on a master-slave polling mechanism.

[0099] In one embodiment, the polling unit 401 is specifically configured to:

[0100] For each ATP host, polling data carrying address information is sent at a preset interval, so that when the address information matches the address of the train control on-board system corresponding to the ATP host, the ATP host returns reply data carrying information to be displayed.

[0101] In one embodiment, the DMI device is provided with a first communication port and a second communication port;

[0102] Accordingly, the polling unit 401 is specifically configured to:

[0103] Determine an available target communication port from the first communication port and the second communication port;

[0104] For each ATP host, polling data carrying address information is sent through the target communication port at preset intervals, so that when the address information matches the address of the train control on-board system corresponding to the ATP host, the ATP host returns reply data carrying information to be displayed through the target communication port.

[0105] The receiving unit 402 is used to extract the information to be displayed from the reply data when receiving the reply data returned by any ATP host.

[0106] The display unit 403 is used to display information to be displayed.

[0107] In one embodiment, the display unit 403 is specifically configured to:

[0108] Determine the train control object from the train control onboard system corresponding to each ATP host;

[0109] The display interface corresponding to the vehicle control object is displayed based on the preset logic, and the information to be displayed extracted from the reply data returned by the vehicle control object is displayed in the display interface.

[0110] In one embodiment, the device further comprises:

[0111] The switching unit is used to generate access data based on the address of the vehicle control object when the user selects a vehicle control object from multiple train control on-board systems, and send the access data to the ATP host corresponding to the vehicle control object; receive target reply data returned by the ATP host corresponding to the vehicle control object, and extract target information to be displayed from the target reply data; display the display interface corresponding to the vehicle control object based on preset logic, and display the target information to be displayed in the display interface.

[0112] A display device for a DMI device disclosed in the above-mentioned embodiment of the present invention is applied to the DMI device. The DMI device and the ATP hosts in multiple train control on-board systems are connected via a communication bus. The device includes: a polling unit, which is used to use the DMI device as a master device and each ATP host as a slave device, and poll each ATP host based on a master-slave polling mechanism; a receiving unit, which is used to extract the information to be displayed from the reply data when receiving the reply data returned by any ATP host; and a display unit, which is used to display the information to be displayed. In this solution, the existing master-slave communication relationship between the train control on-board system and the DMI device is changed to a communication relationship in which the DMI device is the master device and the train control on-board system is the slave device, so as to realize communication with multiple train control on-board systems and thereby achieve the purpose of cost saving.

[0113] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can refer to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system or system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can refer to the partial description of the method embodiment. The system and system embodiments described above are merely schematic, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without creative work.

[0114] Professionals may further appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in the above description according to function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0115] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A display method of a DMI device, characterized in that: Applied to a DMI device, the DMI device and an ATP host in a plurality of train control vehicle systems are connected via a communication bus, and the method comprises: Taking the DMI device as the master device and each of the ATP hosts as the slave devices, polling each of the ATP hosts based on a master-slave polling mechanism; When receiving reply data returned by any of the ATP hosts, extracting information to be displayed from the reply data; The information to be displayed is displayed.

2. The method according to claim 1, characterized in that The method of using the DMI device as a master device and each of the ATP hosts as a slave device, and polling each of the ATP hosts based on a master-slave polling mechanism, includes: For each of the ATP hosts, polling data carrying address information is sent at intervals of a preset duration, so that when the address information matches the address of the train control on-board system corresponding to the ATP host, the ATP host returns reply data carrying information to be displayed.

3. The method according to claim 2, characterized in that The DMI device is provided with a first communication port and a second communication port; Accordingly, for each of the ATP hosts, polling data carrying address information is sent at a preset interval, so that when the address information matches the address of the train control on-board system corresponding to the ATP host, the ATP host returns reply data carrying information to be displayed, including: Determine an available target communication port from the first communication port and the second communication port; For each of the ATP hosts, polling data carrying address information is sent through the target communication port at intervals of a preset duration, so that when the address information matches the address of the train control on-board system corresponding to the ATP host, the ATP host returns reply data carrying information to be displayed through the target communication port.

4. The method according to claim 1, characterized in that The displaying of the information to be displayed includes: Determine the vehicle control object from the train control onboard system corresponding to each of the ATP hosts; The display interface corresponding to the vehicle control object is displayed based on a preset logic, and the information to be displayed extracted from the reply data returned by the vehicle control object is displayed in the display interface.

5. The method according to any one of claims 1 to 4, characterized in that: The method further comprises: When a user selects a vehicle control object from a plurality of the train control onboard systems, access data is generated based on the address of the vehicle control object, and the access data is sent to an ATP host corresponding to the vehicle control object; Receive target response data returned by the ATP host corresponding to the vehicle control object, and extract target information to be displayed from the target response data; The display interface corresponding to the vehicle control object is displayed based on the preset logic, and the target information to be displayed is displayed in the display interface.

6. A display device of a DMI device, characterized in that: Applied to a DMI device, the DMI device is connected to an ATP host in multiple train control vehicle systems via a communication bus, and the device comprises: A polling unit, configured to use the DMI device as a master device and each of the ATP hosts as a slave device, and poll each of the ATP hosts based on a master-slave polling mechanism; A receiving unit, configured to extract information to be displayed from the reply data when receiving reply data returned by any of the ATP hosts; The display unit is used to display the information to be displayed.

7. The device according to claim 6, characterized in that The polling unit is specifically used for: For each of the ATP hosts, polling data carrying address information is sent at intervals of a preset duration, so that when the address information matches the address of the train control on-board system corresponding to the ATP host, the ATP host returns reply data carrying information to be displayed.

8. The device according to claim 7, characterized in that The DMI device is provided with a first communication port and a second communication port; Accordingly, the polling unit is specifically used for: Determine an available target communication port from the first communication port and the second communication port; For each of the ATP hosts, polling data carrying address information is sent through the target communication port at intervals of a preset duration, so that when the address information matches the address of the train control on-board system corresponding to the ATP host, the ATP host returns reply data carrying information to be displayed through the target communication port.

9. The device according to claim 6, characterized in that The display unit is specifically used for: Determine the vehicle control object from the train control onboard system corresponding to each of the ATP hosts; The display interface corresponding to the vehicle control object is displayed based on a preset logic, and the information to be displayed extracted from the reply data returned by the vehicle control object is displayed in the display interface.

10. The device according to any one of claims 6 to 9, characterized in that: The device also includes: A switching unit, used for generating access data based on the address of the vehicle control object when a user selects a vehicle control object from a plurality of the train control vehicle-mounted systems, and sending the access data to an ATP host corresponding to the vehicle control object; Receive target response data returned by the ATP host corresponding to the vehicle control object, and extract target information to be displayed from the target response data; The display interface corresponding to the vehicle control object is displayed based on the preset logic, and the target information to be displayed is displayed in the display interface.

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