Duplex display screen control system, control method and rail vehicle

Abstract

The invention relates to the technical field of vehicle display control, in particular to a duplex display screen control system and method and a rail vehicle, and the control system comprises two processors, an arbitration circuit and two touch screens; each processor is connected with each system of the vehicle through the Ethernet, receives the same data and executes the same processing; the arbitration circuit sends a signal of the first processor to the first touch screen for display, and sends control data obtained from the second touch screen to the first processor; when the arbitration circuit monitors that the first processor breaks down, a signal of the second processor is sent to the touch screen to be displayed, control data obtained from the touch screen is sent to the second processor, and seamless switching is achieved; when the arbitration circuit monitors that one touch screen breaks down, the display content of the two touch screens is combined on the other touch screen to be displayed, it is ensured that a vehicle can operate normally, the driving process of a driver is not affected, and therefore driving safety is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of vehicle display control, and particularly to a dual-display screen control system, a control method, and a rail vehicle. Background Art

[0002] The driver's cab of a rail vehicle is provided with multiple display screens for displaying vehicle driving speed, status information of the traction system, door status information, brake system status information, fault information, pantograph status information, etc. The multiple display screens work independently, and each display screen can only display fixed content. Once a display screen fails, the driver cannot obtain the content that the faulty display screen itself can display, which poses a relatively high risk to the driving process.

[0003] In addition, with the development of intelligent vehicles, more and more parameters need to be concerned by the driver, and a lot of information needs to be displayed in the form of video. At present, the display screen is connected to each vehicle system through the Multifunction Vehicle Bus (abbreviation: VBS), and the data transmission speed is limited, and the data type is relatively single. Summary of the Invention

[0004] The present disclosure provides a dual-display screen control system, a control method, and a rail vehicle to solve one of the above technical defects.

[0005] In a first aspect, the present disclosure provides a dual-display screen control system, including: two processors, an arbitration circuit, and two touch screens; the two processors and the two touch screens are both connected to the arbitration circuit;

[0006] Each processor is connected to each vehicle system through Ethernet, and the two processors receive the same data from each vehicle system and perform the same processing;

[0007] The arbitration circuit sends the signal of the first processor to the first touch screen for display, and sends the control data obtained from the second touch screen to the first processor; the arbitration circuit is also used to monitor the status of the two processors. When it is detected that the first processor fails, the signal of the second processor is sent to the first touch screen for display, and the control data obtained from the second touch screen is sent to the second processor;

[0008] The arbitration circuit is also used to monitor the status of the two touch screens. When one touch screen fails, the display contents of the two touch screens are combined and displayed on the other touch screen.

[0009] In some embodiments, the arbitration circuit includes: a switching logic unit, a processor interface unit, and a touch screen interface unit;

[0010] The number of processor interface units is two, and one processor interface unit is correspondingly connected to one processor; the number of touch screen interface units is two, and one touch screen interface unit is correspondingly connected to one touch screen; the switching logic unit is respectively connected to the two processor interface units and the two touch screen interface units.

[0011] In some embodiments, the processor interface unit includes:

[0012] A Serial Peripheral Interface (SPI) connected to the processor for collecting the status of the processor;

[0013] A Low-Voltage Differential Signaling (LVDS) interface connected to the processor for receiving data sent by the processor.

[0014] In some embodiments, the touch screen interface unit includes:

[0015] A Low-Voltage Differential Signaling (LVDS) interface connected to the touch screen;

[0016] A Universal Serial Bus (USB) interface connected to the touch screen.

[0017] In some embodiments, the arbitration circuit is a Field Programmable Gate Array (FPGA) circuit.

[0018] In some embodiments, the processor is provided with a Controller Area Network (CAN) interface, and data is exchanged between the two processors through the CAN bus.

[0019] In some embodiments, the processor is provided with two Gigabit Ethernet interfaces.

[0020] In some embodiments, the processor is provided with a photosensitive interface.

[0021] In a second aspect, the present disclosure provides a rail vehicle including the dual-display screen control system as described above.

[0022] In a third aspect, the present disclosure provides a control method based on the above dual-display screen control system, including:

[0023] Monitoring the status information of the two processors;

[0024] When both processors are operating normally, sending the signal of the first processor to the first touch screen for display, and sending the control data obtained from the second touch screen to the first processor;

[0025] When the first processor fails, sending the signal of the second processor to the first touch screen for display, and sending the control data obtained from the second touch screen to the second processor;

[0026] Monitoring the status information of the two touch screens;

[0027] When a touch screen fails, the display contents of the two touch screens are sent to the other touch screen for combined display.

[0028] The technical solution provided by the embodiments of the present disclosure employs two processors, an arbitration circuit, and two touch screens; the two processors and the two touch screens are both connected to the arbitration circuit; each processor is connected to each system of the vehicle through Ethernet, and the two processors receive the same data from each system of the vehicle and perform the same processing; the arbitration circuit sends the signal of the first processor to the first touch screen for display, and sends the control data obtained from the second touch screen to the first processor; the arbitration circuit is also used to monitor the status of the two processors. When it is detected that the first processor fails, the signal of the second processor is sent to the first touch screen for display, and the control data obtained from the second touch screen is sent to the second processor; the arbitration circuit is also used to monitor the status of the two touch screens. When one touch screen fails, the display contents of the two touch screens are combined and displayed on the other touch screen; when one processor fails, it can be seamlessly switched to the other processor. When one touch screen fails, the data is merged to the other touch screen for display, ensuring that the vehicle can operate normally without affecting the driving process of the driver, thereby improving driving safety. Description of the Drawings

[0029] The present disclosure will be described in more detail below based on the embodiments and with reference to the drawings:

[0030] Figure 1 It is a schematic block diagram of a dual-display control system provided by the embodiments of the present disclosure;

[0031] Figure 2 It is an architecture diagram of a processor in a dual-display control system provided by the embodiments of the present disclosure;

[0032] Figure 3 It is a schematic block diagram of an arbitration circuit in a dual-display control system provided by the embodiments of the present disclosure;

[0033] Figure 4 It is a schematic diagram of an application scenario of a dual-display control system provided by the embodiments of the present disclosure;

[0034] Figure 5 It is another schematic diagram of an application scenario of a dual-display control system provided by the embodiments of the present disclosure;

[0035] Figure 6 It is yet another schematic diagram of an application scenario of a dual-display control system provided by the embodiments of the present disclosure;

[0036] Figure 7Another application scenario diagram of a dual display control system provided by an embodiment of the present disclosure;

[0037] Figure 8 Another application scenario diagram of a dual display control system provided by an embodiment of the present disclosure;

[0038] Figure 9 Flowchart of the dual display control method provided by an embodiment of the present disclosure.

[0039] In the drawings, the same components are denoted by the same reference numerals, and the drawings are not drawn to actual scale. Detailed implementation manners

[0040] In order to enable those skilled in the art to better understand the technical solutions of the present disclosure, and to fully understand how the present disclosure uses technical means to solve technical problems and achieve the corresponding technical effects, and to implement accordingly, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all of the embodiments. The embodiments of the present disclosure and each feature in the embodiments can be combined with each other without conflict, and the formed technical solutions are all within the protection scope of the present disclosure. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present disclosure.

[0041] It should be noted that the terms "first", "second", etc. in the specification and claims of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present disclosure described herein can be implemented in an order different from those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0042] It should be noted that the steps shown in the flowchart of the drawings can be executed in a computer system such as a set of computer executable instructions, and although the logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in a different order than here.

[0043] Explanation of the English abbreviations mentioned in this embodiment:

[0044] SPI: Serial Peripheral Interface;

[0045] LVDS: Low Voltage Differential Signaling;

[0046] USB: Universal Serial Bus;

[0047] FPGA: Field Programmable Gate Array;

[0048] CAN: Controller Area Network.

[0049] This embodiment provides a dual-display control system, which can be applied to vehicles, especially to rail vehicles, to display and control vehicle system data.

[0050] As Figure 1 shown, the dual-display control system provided in this embodiment includes: two processors (CPU1 and CPU2), an arbitration circuit, and two touch screens. The two processors and the two touch screens (the first touch screen and the second touch screen) are all connected to the arbitration circuit.

[0051] Each processor is connected to each vehicle system through Ethernet. The two processors receive the same data from each vehicle system and perform the same processing. For example: Each processor is connected to the braking system and the traction system of the vehicle through Ethernet to obtain braking system data and traction system data. The two processors are redundant to each other.

[0052] The arbitration circuit is used to monitor the states of the two processors. When the two processors are working properly, the arbitration circuit sends the signal of the first processor (assumed to be CPU1) to the first touch screen for display, and sends the control data obtained from the second touch screen to the first processor (CPU1). When it is detected that the first processor (CPU1) fails, the signal of the second processor (CPU2) is sent to the first touch screen for display, and the control data obtained from the second touch screen is sent to the second processor (CPU2). Since CPU2 synchronously obtains the vehicle system data and performs the same data processing, the signal of CPU2 is directly sent to the touch screen for display, and its display data is exactly the same as that sent by CPU1, thus ensuring the normal display of vehicle system data.

[0053] The arbitration circuit is also used to monitor the status of two touch screens. When one touch screen fails, the display contents of the two touch screens are merged and displayed on the other touch screen. For example, one touch screen displays vehicle braking system data, and the other touch screen displays vehicle traction system data. When one touch screen fails, the arbitration circuit sends both the braking data and the traction data to the other touch screen, which can display both the traction data and the braking data simultaneously, ensuring that all the data can be displayed normally for the driver to view and avoiding affecting the vehicle's driving.

[0054] The technical solution provided in this embodiment uses two processors, an arbitration circuit, and two touch screens; the two processors and the two touch screens are both connected to the arbitration circuit; each processor is connected to each system of the vehicle through Ethernet, and the two processors receive the same data from each system of the vehicle and perform the same processing; the arbitration circuit sends the signal of the first processor to the first touch screen for display, and sends the control data obtained from the second touch screen to the first processor; the arbitration circuit is also used to monitor the status of the two processors. When it detects that the first processor fails, it sends the signal of the second processor to the first touch screen for display, and sends the control data obtained from the second touch screen to the second processor; the arbitration circuit is also used to monitor the status of the two touch screens. When one touch screen fails, the display contents of the two touch screens are merged and displayed on the other touch screen; when one processor fails, it can be seamlessly switched to the other processor. When one touch screen fails, the data is merged to the other touch screen for display, ensuring that the vehicle can operate normally without affecting the driver's driving process, thereby improving driving safety.

[0055] In addition, since the processors are all connected to each system of the vehicle through Ethernet, video data of each system of the vehicle can also be obtained and displayed on the touch screen, enabling the driver to more intuitively observe the status of each system of the vehicle.

[0056] As Figure 2 shown, there are two processors provided in this embodiment. Each processor is provided with two Gigabit Ethernet interfaces, 1 photosensitive interface, 2 CAN interfaces, 2 LVDS display interfaces, 1 MIPI display interface, 4 USB interfaces, etc. Data interaction between the two processors is carried out through the CAN bus.

[0057] Based on the above technical solution, this embodiment provides an implementation manner of an arbitration circuit: As Figure 3 shown, the arbitration circuit includes a switching logic unit, a processor interface unit, and a touch screen interface unit. Among them, the number of processor interface units is two, and one processor interface unit is correspondingly connected to one processor. Specifically, one processor interface unit is correspondingly connected to CPU1, and the other processor interface unit is correspondingly connected to CPU2.

[0058] The processor interface unit includes: a Serial Peripheral Interface (SPI) which is connected to the processor and used to collect the status of the processor. Through this interface, the status of the CPU is detected (i.e., detecting the vital signal of the CPU) to find out whether the CPU has a fault.

[0059] The processor interface unit also includes: two Low-Voltage Differential Signaling (LVDS) interfaces which are connected to the processor and used to receive the data sent by the processor. The LVDS interface is a dual 8-bit interface.

[0060] The processor interface unit also includes: two USB touch interfaces which are correspondingly connected to the processor.

[0061] The number of the above touch screen interface units is two, and one touch screen interface unit is correspondingly connected to one touch screen. Specifically, one touch screen interface unit is correspondingly connected to the first touch screen, and the first touch screen can be a liquid crystal display with a resolution of 2560×1024. Specifically, the touch screen interface unit includes two dual 8-bit LVDS interfaces which are connected to the first touch screen. The other touch screen interface unit includes two USB touch interfaces which are connected to the second touch screen, and the second touch screen can be a 21-inch touch panel.

[0062] The switching logic unit is respectively connected to the two processor interface units and the two touch screen interface units. Suppose Figure 3 the first touch screen on the left fails, then the switching logic unit will send the data received from the processor interface unit to the second touch screen on the right through the USB touch interface for combined display, that is: display both the data that should originally be displayed on the second touch screen and the data that should originally be displayed on the first touch screen. And, the switching logic unit will also send the control instructions collected on the second touch screen to the processor.

[0063] Suppose Figure 3 the second touch screen on the right fails, then the switching logic unit will send the data received from the processor interface unit to the first touch screen on the left through the LVDS interface for combined display, that is: display both the data that should originally be displayed on the first touch screen and the data that should originally be displayed on the second touch screen. And, the switching logic unit will also send the control instructions collected on the first touch screen to the processor.

[0064] The way of combined display can be: preset the format of combined display. When combined display is needed, the switching logic unit will send all the data to the normal touch screen according to the format of combined display. This way can be specifically implemented with reference to the existing technologies in this field.

[0065] The above arbitration circuit is a Field Programmable Gate Array (FPGA) circuit, which is built through a hardware circuit according to the above technical solution. Compared with the solution of multiple discrete switching chips and control logic chips, it has the advantages of high integration and high reliability. The arbitration circuit monitors the status of CPU1 and CPU2 through the SPI interface and receives the active switching control command. It receives the dual-channel 8-line LVDS signals output by CPU1 and CPU2, selects an appropriate video signal to drive the liquid crystal display according to the system status, and forwards the touch screen signal matching the liquid crystal display to the corresponding CPU for processing.

[0066] The specific application of the arbitration circuit and the redundant switching function includes the following 4 scenarios. It is assumed that Touch Screen A and Touch Screen B display braking and traction data respectively in the scenarios.

[0067] Scenario 1: No CPU failure.

[0068] As Figure 4 shown, when both CPUs are working properly, CPU1 controls the display output of the two touch screens (such as the red arrow in Figure 4 ), and sends the touch signal to CPU1.

[0069] Scenario 2: CPU1 fails.

[0070] As Figure 5 shown, when the arbitration circuit monitors that the vital signal of CPU1 is interrupted, indicating that CPU1 has failed, it switches the touch screen to CPU2 (such as the red arrow in Figure 5 ), that is, the arbitration circuit forwards the data of CPU2 to the touch screen for display, and forwards the instructions received by the touch screen to CPU2.

[0071] Scenario 3: Both CPU1 and CPU2 fail

[0072] As Figure 6 shown, when the arbitration circuit monitors that both touch screens have failed, the system is unavailable.

[0073] Scenario 4: The first touch screen fails

[0074] As Figure 7 shown, when the arbitration circuit monitors that Touch Screen A has failed. The arbitration circuit controls the application GUI of Touch Screen B to provide the option of combining braking and traction screens, and displays both braking data and traction data on Touch Screen B simultaneously.

[0075] Scenario 5: The second touch screen fails

[0076] As Figure 8As shown in the figure, when the arbitration circuit detects a fault in touch screen B, the arbitration circuit controls the application program GUI of touch screen A to provide a braking and traction combined screen option, and simultaneously displays braking data and traction data on touch screen A.

[0077] In the above solution, when a touch screen fails, the arbitration circuit can forward the data of the CPU to another touch screen for combined display, and can display the video transmitted through Ethernet on the touch screen, can also play back historical videos, and can also perform video linkage.

[0078] Moreover, two power supplies are used to supply power to each part of the system to achieve redundant power supply. The two processors are also redundant with each other, and when one processor fails, the other processor can synchronously process data.

[0079] Based on the above technical solution, this embodiment further provides a rail vehicle, including the dual display screen control system provided above, and this rail vehicle has the same technical effects as the above control system.

[0080] Based on the above technical solution, this embodiment further provides a dual display screen control method based on the above dual display screen control system, and this method can be executed by an independent processor or by the arbitration circuit.

[0081] As Figure 9 shown, the control method provided in this embodiment includes the following steps:

[0082] Step 101, monitor the status information of the two processors.

[0083] Step 102, when both processors are working properly, send the signal of the first processor to the first touch screen for display, and send the control data obtained from the second touch screen to the first processor.

[0084] Step 103, when the first processor fails, send the signal of the second processor to the first touch screen for display, and send the control data obtained from the second touch screen to the second processor.

[0085] Step 104, monitor the status information of the two touch screens.

[0086] Step 105, when a touch screen fails, send the display contents of the two touch screens to the other touch screen for combined display.

[0087] The specific implementation manners of the above steps may refer to the above content. The above control method monitors the states of two processors. When both processors are working properly, it sends the signal of the first processor to the first touch screen for display and sends the control data obtained from the second touch screen to the first processor; when the first processor fails, it sends the signal of the second processor to the first touch screen for display and sends the control data obtained from the second touch screen to the second processor; it also monitors the status information of the two touch screens. When one touch screen fails, it sends the display contents of the two touch screens to the other touch screen for combined display. When one processor fails, it can seamlessly switch to the other processor. When one touch screen fails, it combines the data to the other touch screen for display, ensuring that the vehicle can operate normally without affecting the driving process of the driver, thereby improving driving safety.

[0088] The processor may include, but is not limited to, for example, one or more processors or microprocessors, etc. Each processor may be implemented by an application specific integrated circuit (ASIC), a digital signal processor (DSP), a digital signal processing device (DSPD), a programmable logic device (PLD), a field programmable gate array (FPGA), a controller, a microcontroller, a microprocessor, or other electronic components, and is used to execute the method in the above embodiments.

[0089] The computer-readable storage medium may be implemented by any type of volatile or non-volatile storage device or a combination thereof. The computer-readable storage medium may include, but is not limited to, for example, a random access memory (RAM), a read-only memory (ROM), a flash memory, an EPROM memory, an EEPROM memory, a register, a computer storage medium (such as a hard disk, a floppy disk, a solid state drive, a removable disk, a CD-ROM, a DVD-ROM, a Blu-ray disc, etc.).

[0090] The computer-readable storage medium may also store at least one computer-executable program / instructions, such as computer-readable instructions. The computer-readable storage medium includes, but is not limited to, for example, volatile memory and / or non-volatile memory. Volatile memory may include, for example, random access memory (RAM) and / or cache memory, etc. The computer-readable storage medium may include, for example, read-only memory (ROM), hard disk, flash memory, etc. For example, the non-transitory computer-readable storage medium may be connected to a computing device such as a computer. Then, when the computing device runs the computer-readable instructions stored on the computer-readable storage medium, the various methods described above may be performed.

[0091] In addition, the computer device may also include (but is not limited to) a data bus, an input / output (I / O) bus, a display, and input / output devices (such as a keyboard, a mouse, a speaker, etc.).

[0092] The processor may communicate with external devices via the I / O bus through a wired or wireless network.

[0093] In one embodiment, the at least one computer-executable instruction may also be compiled into or form a software product / computer program product, and when one or more computer-executable instructions are run by a processor, the steps of the various functions and / or methods in the embodiments described in the present technology are performed.

[0094] In the embodiments provided in the present disclosure, it should be understood that the disclosed apparatus and method may also be implemented in other ways. The apparatus embodiments described above are merely illustrative. For example, the flowcharts and block diagrams in the accompanying drawings show the possible architectures, functions, and operations of an apparatus, a method, and a computer program product according to multiple embodiments of the present disclosure. In this regard, each block in the flowchart or block diagram may represent a module, a program segment, or a part of code, and the above-mentioned module, program segment, or part of code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the blocks may occur in a different order than marked in the accompanying drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in the reverse order, depending on the functions involved. It should also be noted that each block in the block diagram and / or flowchart, and the combination of blocks in the block diagram and / or flowchart, may be implemented by a dedicated hardware-based system for performing the specified functions or actions, or may be implemented by a combination of dedicated hardware and computer instructions.

[0095] It should be noted that in this disclosure, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element limited by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, article or device including the element.

[0096] Although the embodiments disclosed in this disclosure are as above, the above content is only an embodiment adopted for the convenience of understanding this disclosure and is not used to limit this disclosure. Any person skilled in the art within the technical field to which this disclosure pertains may make any modifications and changes in the form of implementation and details without departing from the spirit and scope disclosed in this disclosure. However, the scope of patent protection of this disclosure shall still be subject to the scope defined by the appended claims.

Claims

1. A dual display screen control system, characterized in that: include: Two processors, arbitration circuit, two touch screens; The two processors and the two touch screens are connected to the arbitration circuit; Each processor is connected to each vehicle system via Ethernet, and the two processors receive the same data from each vehicle system and perform the same processing; The arbitration circuit sends the signal of the first processor to the first touch screen for display, and sends the control data obtained from the second touch screen to the first processor; The arbitration circuit is also used to monitor the status of the two processors. When a fault is detected in the first processor, the signal of the second processor is sent to the first touch screen for display, and the control data obtained from the second touch screen is sent to the second processor; The arbitration circuit is also used to monitor the status of the two touch screens. When one touch screen fails, the display contents of the two touch screens are combined and displayed on the other touch screen.

2. The dual display screen control system according to claim 1, characterized in that: The arbitration circuit includes: a switching logic unit, a processor interface unit and a touch screen interface unit; There are two processor interface units, one processor interface unit is connected to one processor; there are two touch screen interface units, one touch screen interface unit is connected to one touch screen; and the switching logic unit is connected to the two processor interface units and the two touch screen interface units respectively.

3. The dual display screen control system according to claim 2, characterized in that: The processor interface unit includes: Serial peripheral SPI interface, connected to the processor, used to collect the status of the processor; The low voltage differential signal LVDS interface is connected to the processor and is used to receive data sent by the processor.

4. The dual display screen control system according to claim 2, characterized in that: The touch screen interface unit includes: Low voltage differential signal LVDS interface, connected to the touch screen; Universal Serial Bus USB interface, connected to the touch screen.

5. The dual display screen control system according to any one of claims 2 to 4, characterized in that: The arbitration circuit is a field programmable gate array FPGA circuit.

6. The dual display screen control system according to claim 1, characterized in that: The processor is provided with a controller area network (CAN) interface, and the two processors exchange data via the CAN bus.

7. The dual display screen control system according to claim 1, characterized in that: The processor is equipped with two Gigabit Ethernet interfaces.

8. The dual display screen control system according to claim 1, characterized in that: The processor is provided with a photosensing interface.

9. A rail vehicle, characterized in that: It includes the dual display screen control system as described in any one of claims 1-8.

10. A control method based on the dual display screen control system according to any one of claims 1 to 8, characterized in that: include: Monitor the status information of the two processors; When both processors are operating normally, the signal of the first processor is sent to the first touch screen for display, and the control data obtained from the second touch screen is sent to the first processor; When the first processor fails, the signal of the second processor is sent to the first touch screen for display, and the control data obtained from the second touch screen is sent to the second processor; Monitor the status information of two touch screens; When one touch screen fails, the display contents of the two touch screens are sent to the other touch screen for combined display.

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