Communication board card and LCU case comprising same

Abstract

The utility model discloses a communication board card and an LCU (Local Control Unit) case comprising the communication board card, particularly relates to the technical field of communication equipment, and is technically characterized in that the communication board card comprises a plurality of communication devices, and each communication device comprises a control processor; the first communication equipment, the second communication equipment and the third communication equipment are connected with the control processor; each of the plurality of control processors is provided with a GPIO (General Purpose Input / Output) input port and a GPIO output port, and the plurality of control processors are mutually connected through the GPIO input ports and the GPIO output ports; the plurality of first communication devices are connected with an upper computer, the plurality of second communication devices are connected with a first external communication bus, and the plurality of third communication devices are connected with a second external communication bus.

Description

Technical Field

[0001] This utility model relates to the field of communication equipment technology, specifically to a communication board and an LCU chassis including the communication board. Background Technology

[0002] LCU stands for Programmable Logic Control Unit. It replaces traditional contact components such as intermediate and time relays in train circuits. Through software logic, it directly controls and drives components like train contactors and solenoid valves, performing various vehicle control functions. It also uploads diagnostic and status data to the train's TCMS system and displays it on the HMI. Within the LCU system, the board responsible for communication with the TCMS system is called the communication board. It primarily enables bidirectional communication between the LCU and the TCMS system. By collecting data from the LCU chassis and forwarding it to the TCMS, it enables remote fault reporting and remote vehicle status monitoring. By collecting data from the TCMS and forwarding it to the LCU system, it enables remote vehicle control and remote information synchronization.

[0003] In some LCU systems that require redundancy, the traditional approach is to insert two communication cards into the chassis to achieve redundancy. However, this method occupies two slots in the LCU chassis, and since the number of slots in the LCU chassis is limited, this approach restricts the scalability of the LCU system.

[0004] Therefore, the present invention aims to provide a communication board and an LCU chassis including the communication board to solve the aforementioned problems. Utility Model Content

[0005] The technical problem this invention aims to solve is that the limited number of slots within the LCU chassis leads to limitations in the scalability of the LCU system due to the existing method of inserting dual communication boards. The purpose is to provide a communication board and an LCU chassis including the communication board. By setting multiple communication devices on a single communication board, a dual-redundant communication system is formed, thus solving the problem of limited scalability caused by the existing method of inserting dual communication boards. Simultaneously, each communication device establishes an independent communication link with the TCMS system, thereby mitigating the risks caused by equipment malfunctions in a single communication system, improving the safety of the LCU system, effectively solving existing problems in traditional software design, and providing technical support for the safe and efficient operation of trains. Furthermore, by using the GPIO input and output ports of multiple communication devices, a data synchronization link is constructed between the multiple communication devices, realizing the synchronous operation of the dual-redundant system.

[0006] This utility model is achieved through the following technical solution:

[0007] A communication board includes multiple communication devices, each of which includes a control processor and a first communication device, a second communication device, and a third communication device connected to the control processor; each of the multiple control processors is provided with a GPIO input port and a GPIO output port, and the multiple control processors are interconnected through the GPIO input port and the GPIO output port.

[0008] The first communication devices are all connected to the host computer, the second communication devices are all connected to the first external communication bus, and the third communication devices are all connected to the second external communication bus.

[0009] Furthermore, each of the multiple communication devices also includes a temperature acquisition device, a data storage device, and a memory expansion device; all of the multiple temperature acquisition devices, data storage devices, and memory expansion devices are connected to the control processor; wherein, the data storage device includes a first memory chip and a second memory chip.

[0010] Furthermore, each of the multiple communication devices also includes a watchdog device, and each of the multiple watchdog devices is connected to the control processor.

[0011] Furthermore, the first communication device is connected to the control processor via the MII bus.

[0012] Furthermore, each of the control processors includes four CAN communication terminals. The second communication device employs two CAN transceivers, one end of which is connected to two of the CAN communication terminals, and the other end of which is connected to the first external communication bus. The third communication device employs two CAN communication conversion chips, which are connected to the remaining two CAN communication terminals, and the other end of which is connected to the second external communication bus.

[0013] Furthermore, each of the control processors is also equipped with a UART serial port, and multiple control processors are interconnected through the UART serial port.

[0014] Furthermore, the communication board also includes a power supply interface, which is connected to multiple of the communication devices.

[0015] Furthermore, the first memory chip in the data storage device is connected to the control processor via an SPI bus, and the second memory chip in the data storage device is connected to the control processor via an IIC bus.

[0016] This utility model also provides an LCU chassis including any of the communication boards described above.

[0017] Furthermore, the first external communication bus is connected to at least one internal device of the LCU chassis, and the second external communication bus is connected to at least one external device of the LCU chassis.

[0018] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0019] In this embodiment, by setting multiple communication devices on a single communication board to form a dual-redundant communication system, the problem of limited scalability of the LCU system caused by inserting dual communication boards in the existing method is solved. At the same time, each communication device establishes an independent communication link with the TCMS system, thereby solving the risks caused by equipment failure in a single communication system, improving the safety of the LCU system, effectively solving existing problems in traditional software design, and providing technical support for the safe and efficient operation of the train. In addition, by using the GPIO input ports and GPIO output ports of multiple communication devices, a data synchronization link is built between the multiple communication devices to realize the synchronous operation function of the dual-redundant system. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the exemplary embodiments of this utility model, the drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this utility model and should not be considered as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort. In the drawings:

[0021] Figure 1 This is a schematic diagram of the structure of an LCU chassis in this embodiment;

[0022] Figure 2 This is a schematic diagram of the structure of a communication board in this embodiment;

[0023] Figure 3 This is a schematic diagram showing the component connections of the two communication devices on the communication board in this embodiment;

[0024] Figure 4 This is a schematic diagram of the communication between the two communication devices in this embodiment;

[0025] Figure 5 This is a schematic diagram showing the connection between the GPIO input ports and GPIO output ports of the two communication devices in this embodiment.

[0026] The attached diagram shows the markings and corresponding component names:

[0027] 10. LCU chassis; 100. Communication board; 1. Board body; 2. Communication device; 20. Control processor; 21. First communication device; 22. Second communication device; 23. Third communication device; 24. Temperature acquisition device; 25. First memory chip; 26. Second memory chip; 27. Memory expansion device; 28. Watchdog device; 3. M12 interface; 4. External communication interface. Detailed Implementation

[0028] The exemplary embodiments of this disclosure are described below with reference to the accompanying drawings, including various details of the embodiments to aid understanding, and should be considered merely exemplary. Therefore, those skilled in the art will recognize that various changes and modifications can be made to the embodiments described herein without departing from the scope of this disclosure. Similarly, for clarity and brevity, descriptions of well-known functions and structures are omitted in the following description.

[0029] In this disclosure, unless otherwise stated, the use of terms such as "first," "second," etc., to describe various elements is not intended to limit the positional, temporal, or importance relationships of these elements; such terms are merely used to distinguish one element from another. In some examples, the first element and the second element may refer to the same instance of that element, while in other cases, based on the context, they may refer to different instances.

[0030] The terminology used in the description of the various examples in this disclosure is for the purpose of describing particular examples only and is not intended to be limiting. Unless the context explicitly indicates otherwise, an element may be one or more unless the number of elements is specifically limited. Furthermore, the term "and / or" as used in this disclosure covers any one of the listed items and all possible combinations thereof.

[0031] Example

[0032] See Figure 1 , Figure 1 A schematic diagram of an LCU chassis 10 is shown, wherein the LCU chassis 10 is provided with multiple slots for installing circuit boards. Power boards, main control boards, DIO boards, and storage boards are respectively installed in the slots. This technique is conventional in the art and will not be described in detail here. The slots also house the communication board 100 provided in this embodiment. (See also...) Figure 2 As shown, Figure 2The diagram shows the structure of the communication board 100 provided in this embodiment. The communication board 100 includes a board body 1 and two communication devices 2 disposed on the board body 1. It should be noted that in this embodiment, there are two communication devices 2. In other embodiments, the number of communication devices 2 can be set according to actual needs. No further restrictions are imposed here.

[0033] See Figure 3 As shown, each of the two communication devices 2 includes a control processor 20, and a first communication device 21, a second communication device 22, and a third communication device 23 connected to the control processor 20; each of the two control processors 20 is provided with a GPIO input port and a GPIO output port, and the two control processors 20 are interconnected through the GPIO input port and the GPIO output port; both first communication devices 21 are connected to a host computer, both second communication devices 22 are connected to a first external communication bus, and both third communication devices 23 are connected to a second external communication bus.

[0034] It should be noted that in this embodiment, the control processor 20 uses an STM32F4 microcontroller, the first communication device 21 uses a KSZ8795 PHY chip, one end of each of the two first communication devices 21 is connected to the corresponding control processor 20 via the MII bus, and the other end of each of the two first communication devices 21 is connected to the host computer via two independent standard M12 interfaces 3, thereby realizing independent communication with the host computer; the second communication device 22 uses a two-channel CAN transceiver built into the control processor 20, and the third communication device 23 uses two CAN communication conversion chips, specifically an MCP25 chip that converts SPI communication to CAN communication.

[0035] It should also be noted that in this embodiment, the host computer can be a computer device, and the computer device is equipped with the train TCMS system.

[0036] Additionally, it should be noted that, see Figure 5 As shown, in this embodiment, the GPIO input port GPIO_4in of one control processor 20 is connected to the GPIO output port GPIO_3out of another control processor 20; the GPIO output port GPIO_3in of one control processor 20 is connected to the GPIO input port GPIO_4in of another control processor 20.

[0037] In this embodiment, both control processors 20 are also equipped with GPIO_1 and GPIO_2 ports. The GPIO_1 port of one control processor 20 is connected to a 3.3V power supply and grounded; the GPIO_1 port of the other control processor 20 is grounded and its GPIO_2 port is connected to a 3.3V power supply. Thus, the hardware labels of the control processors 20 can be distinguished by setting the different high and low voltage levels of the I / O ports of the two control processors 20.

[0038] Specifically, in this embodiment, the control processors 20 in the two communication devices 2 facilitate the coordinated control and management of the operation of each device in the communication board 100; the first communication device 21 in the two communication devices 2 facilitates Ethernet communication between the communication board 100 and the host computer, thereby transmitting data to the TCMS system in the host computer; the second communication device 22 in the two communication devices 2 facilitates connection with the first external communication bus to realize CAN communication between the communication board 100 and other boards in the LCU chassis 10; the third communication device 23 in the two communication devices 2 facilitates connection with the second external communication bus and converts SPI communication to CAN communication to realize CAN communication between the communication board 100 and other chassis outside the LCU chassis 10; the GPIO input port and GPIO output port connected between the two control processors 20, and the frequency switching of the output GPIO port, enable the synchronous operation of the two communication devices 2.

[0039] Furthermore, both communication devices 2 also include a temperature acquisition device 24, a data storage device, and a memory expansion device 27; both temperature acquisition devices 24, data storage devices, and memory expansion devices 27 are connected to the control processor 20; wherein, the data storage device includes a first memory chip 25 and a second memory chip 26.

[0040] It should be noted that in this embodiment, the temperature acquisition device 24 uses an AHT20 temperature sensor, which transmits data via IIC communication, allowing the control processor 20 to obtain the current ambient temperature in real time. If the ambient temperature is too high or too low, it will alert the user to handle the fault. This technical solution is a conventional technique and will not be elaborated further here. The first storage chip 25 is a 32G FLASH data storage chip, which is connected to the control processor 20 via an SPI bus. The second storage chip 26 is a 1M EEPROM chip, which is also connected to the control processor 20 via an IIC bus. The memory expansion device 27 is a 4M SDRAM memory expansion chip, which transmits data to the control processor 20 via an FSMC connection line. It should also be noted that in this embodiment, the communication device 2 is also equipped with a voltage detection module, which directly uses the ADC module in the control processor 20 to monitor the current operating voltage of the communication board 100 in real time.

[0041] Furthermore, both communication devices 2 also include watchdog devices 28, and both watchdog devices 28 are connected to the control processor 20.

[0042] It should be noted that in this embodiment, the watchdog device 28 is a hardware watchdog device of model TPS3705. The watchdog circuit is used to monitor the operating status of the control processor 20. After the watchdog is working normally, the communication device 2 needs to periodically reverse the level signal of the feed pin. If the communication device 2 fails to reverse the level signal of the feed pin for a certain period of time due to abnormal operation, the watchdog circuit will reset the communication device 2 by operating the reset pin of the control processor 20.

[0043] Furthermore, each control processor 20 includes four CAN communication terminals. One end of each of the two CAN transceivers is connected to two of the CAN communication terminals, and the other end of each of the two CAN transceivers is connected to the first external communication bus. The two CAN communication conversion chips are connected to the remaining two CAN communication terminals, and the other end of each of the two CAN communication conversion chips is connected to the second external communication bus.

[0044] It should be noted that, see Figure 4As shown, in this embodiment, the first external communication bus includes an internal chassis communication CAN1 bus and an internal chassis communication CAN2 bus. In a communication device 2, one CAN transceiver CAN1 is connected to the internal chassis communication CAN1 bus, and the other CAN transceiver CAN2 is connected to the internal chassis communication CAN2 bus. The second external communication bus includes an inter-chassis communication CAN1 bus and an inter-chassis communication CAN2 bus. In a communication device 2, one CAN communication conversion chip MCP25_1 is connected to the inter-chassis communication CAN1 bus, and the other CAN communication conversion chip MCP25_2 is connected to the inter-chassis communication CAN2 bus. At the same time, an external communication interface 4 for inter-chassis communication is provided on the communication board 100. The two external communication interfaces 4 form a group, corresponding to the inter-chassis communication CAN1 bus and inter-chassis communication CAN2 bus connected to one communication device 2.

[0045] Furthermore, both control processors 20 are also equipped with UART serial ports, and the two control processors 20 are interconnected through UART serial ports.

[0046] It should be noted that in this embodiment, each control processor 20 is also equipped with a UART serial port, and each serial port includes independent transmit, receive and ground signal lines; the two control processors 20 realize data sharing of the dual communication devices 2 through the UART serial port, and realize data synchronization in the redundant system by transmitting their own working status and running data in real time, which facilitates security handling in case of abnormal data asynchrony; at the same time, the above data transmission method is a conventional technical means in the field, and will not be described in detail here.

[0047] Furthermore, the communication board 100 also includes a power supply interface, which is connected to the two communication devices 2 respectively.

[0048] It should be noted that, in this embodiment, a power supply interface is provided on one side of the board body 1 of the communication board 100. The power supply interface adopts a pin configuration of 24V power + and 24V power -. The communication board 100 is inserted into the power supply slot of the LCU chassis 10 through the power supply interface, and the LCU chassis 10 will provide operating power to the various devices in the communication board 100.

[0049] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A communication board, characterized by, The communication board card comprises a plurality of communication devices, each of the plurality of communication devices comprises a control processor, a first communication device, a second communication device and a third communication device connected with the control processor; each of the plurality of control processors is provided with a GPIO input port and a GPIO output port, and the plurality of control processors are connected with each other through the GPIO input port and the GPIO output port; Each of the plurality of first communication devices is connected with an upper computer, each of the plurality of second communication devices is connected with a first external communication bus, and each of the plurality of third communication devices is connected with a second external communication bus.

2. The communication board of claim 1, wherein Each of the plurality of communication devices further comprises a temperature acquisition device, a data storage device and a memory expansion device; the plurality of temperature acquisition devices, data storage devices and memory expansion devices are connected with the control processor; wherein the data storage device comprises a first storage chip and a second storage chip.

3. The communications board of claim 1 wherein, Each of the plurality of communication devices further comprises a watchdog device, and each of the plurality of watchdog devices is connected with the control processor.

4. The communications board of claim 1 wherein, The first communication device is connected with the control processor through an MII bus.

5. The communications board of claim 1 wherein, Each of the control processors comprises four CAN communication terminals, the second communication device adopts two-way CAN transceivers, one end of the two-way CAN transceivers is respectively connected with two CAN communication terminals, and the other end of the two-way CAN transceivers is connected with the first external communication bus; the third communication device adopts two CAN communication conversion chips, the two CAN communication conversion chips are respectively connected with the remaining two CAN communication terminals, and the other end of the two CAN communication conversion chips is connected with the second external communication bus.

6. The communications board of claim 1 wherein, The control processor is further provided with a UART serial port, and the plurality of control processors are connected with each other through the UART serial port.

7. The communications board of claim 1 wherein, The communication board card further comprises a power supply interface, and the power supply interface is connected with the plurality of communication devices.

8. The communications board of claim 2 wherein, The first storage chip in the data storage device is connected with the control processor through an SPI bus, and the second storage chip in the data storage device is connected with the control processor through an IIC bus.

9. An LCU cabinet comprising the communication board card according to any one of claims 1-8.

10. The LCU enclosure of claim 9, wherein, The first external communication bus is connected with at least one internal device of the LCU cabinet, and the second external communication bus is connected with at least one external device of the LCU cabinet.

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