A switch for rail transportation

Abstract

The utility model provides a switch for rail transit. By configuring a switch mainboard, multiple switch expansion boards, and a power board in a chassis, the output end of the power board is electrically connected to the power end of the switch mainboard and the power end of multiple switch expansion boards. At the same time, the switch mainboard is electrically connected to multiple connection ports configured on a first panel through a first network transceiver module, the switch mainboard is connected to a bus through a first CPC I connector, multiple connection ports on a second panel on the switch expansion board are electrically connected to a second network transceiver module, and the second network transceiver module is electrically connected to the bus through a second CPC I connector. A server or workstation can control a device connected to the switch based on the bus, thereby solving the problem that scattered independent switches cannot perform status monitoring and upgrading in a unified manner.

Description

Technical Field

[0001] The utility model relates to the field of switches, in particular to a switch used for rail transportation. Background Art

[0002] With the rapid development of urban rail transit construction, more and more urban subway lines have put forward higher requirements for PIS audio and video transmission between multiple carriages, real-time monitoring data transmission in the carriages, and broadcast information transmission of the entire line. For example, in a subway train consisting of 6 carriages, each carriage is equipped with a PIS display, multiple surveillance cameras, and several broadcast speakers. In order to achieve synchronous playback of PIS programs, real-time transmission of surveillance videos, and rapid issuance of broadcast instructions, multiple host devices need to be deployed on the train, and these hosts are required to be seamlessly connected to form a temporary on-board network.

[0003] The existing technology usually uses additional independent network switches to achieve the above-mentioned network interconnection. However, the status monitoring and firmware upgrades of the decentralized independent switches need to be operated one by one, which has high maintenance costs. In addition, as independent devices, the power supply and heat dissipation of the switches need to be considered separately. Once a failure occurs, it will affect the entire vehicle network.

[0004] In view of this, this application is filed. Utility Model Content

[0005] The utility model discloses a switch for rail transportation, aiming to solve the problem that dispersed independent switches cannot perform status monitoring and upgrading in a unified manner.

[0006] The embodiment of the utility model discloses a switch for rail transit, comprising: a switch mainboard, a plurality of switch expansion boards, and a power supply board;

[0007] Wherein, the output end of the power board is electrically connected to the power end of the switch mainboard and the power ends of the plurality of switch expansion boards;

[0008] The switch mainboard includes a switch main chip, a first network transceiver module, and a plurality of connection ports configured on a first panel, wherein the switch main chip is electrically connected to the plurality of connection ports configured on the first panel through the first network transceiver module, and the switch main chip is connected to the bus through a first CPCI connector;

[0009] Each of the switch expansion boards includes a second network transceiver module and a plurality of connection ports configured on a second panel, wherein the plurality of connection ports configured on the second panel are electrically connected to the second network transceiver module, and the second network transceiver module is connected to the bus via a second CPCI connector.

[0010] Preferably, the switch mainboard further includes: a switch GPIO expansion module, a switch LED expansion module, and an MCU control unit;

[0011] Wherein, the output end of the power board is electrically connected to the power end of the switch GPIO expansion module, the power end of the switch LED expansion module, and the power end of the MCU control unit;

[0012] The switch GPIO expansion module is configured on the switch main chip, the switch LED expansion module is used to connect the LED lamp configured on the first panel and the LED port on the CPCI connector, and the MCU control unit is used to connect the switch main chip and the communication port on the CPCI connector.

[0013] Preferably, the MCU control unit includes: a switch flash, and an MCU chip;

[0014] The switch flash is electrically connected to the MCU chip and the switch main chip through an SPI interface, and the MCU chip is electrically connected to a communication port configured on a CPCI connector.

[0015] Preferably, the first network transceiver module comprises: a first network transformer and a first gigabit network transceiver;

[0016] The first Gigabit network transceiver is electrically connected to the switch main chip, and the first Gigabit network transceiver is electrically connected to a plurality of connection ports configured on the first panel through the first network transformer.

[0017] Preferably, the second network transceiver module comprises: a second network transformer and a second gigabit network transceiver;

[0018] The second gigabit network transceiver is electrically connected to the second CPCI connector via two QSGMIIs, and the second gigabit network transceiver is electrically connected to a plurality of connection ports configured on the second panel via the second network transformer.

[0019] Preferably, the plurality of connection ports configured on the first panel are 8 1000Base-T ports.

[0020] Preferably, the plurality of connection ports configured on the second panel are 8 1000Base-T ports.

[0021] Preferably, it also includes: a backup power supply board;

[0022] The output end of the backup power board is electrically connected to the power end of the switch mainboard and the power ends of the plurality of switch expansion boards.

[0023] A switch for rail transit provided by the utility model is configured in a chassis by configuring a switch mainboard, multiple switch expansion boards, and a power board, and electrically connecting the output end of the power board to the power end of the switch mainboard and the power end of multiple switch expansion boards. At the same time, the switch mainboard is electrically connected to multiple connection ports configured on a first panel through a first network transceiver module, the switch mainboard is connected to a bus through a first CPCI connector, multiple connection ports on a second panel on the switch expansion board are electrically connected to a second network transceiver module, and the second network transceiver module is electrically connected to the bus through a second CPCI connector. A server or workstation can control devices connected to the switch based on the bus, thereby solving the problem that decentralized independent switches cannot perform unified status monitoring and upgrading. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the circuit structure of the switch mainboard provided by the utility model;

[0025] Figure 2 The utility model is a schematic diagram of the circuit structure of the switch expansion board. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is sought, but merely represents the selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model.

[0027] The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0028] The utility model discloses a switch for rail transportation, aiming to solve the problem that dispersed independent switches cannot perform status monitoring and upgrading in a unified manner.

[0029] See also Figure 1 and Figure 2 , the embodiment of the utility model provides a switch for rail transit, including: a switch mainboard, a plurality of switch expansion boards, and a power supply board 8;

[0030] The output end of the power board 8 is electrically connected to the power end of the switch mainboard and the power ends of the plurality of switch expansion boards;

[0031] The switch mainboard includes a switch main chip 1, a first network transceiver module, and a plurality of connection ports configured on a first panel 7, wherein the switch main chip 1 is electrically connected to the plurality of connection ports configured on the first panel 7 through the first network transceiver module, and the switch main chip 1 is connected to the bus through a first CPCI connector 10;

[0032] Each of the switch expansion boards includes a second network transceiver module and a plurality of connection ports configured on a second panel 11, wherein the plurality of connection ports configured on the second panel 11 are electrically connected to the second network transceiver module, and the second network transceiver module is connected to the bus via a second CPCI connector 14.

[0033] It should be noted that the switch provided in this embodiment can be configured in rail transit. Taking the subway as an example, a switch can be configured in each carriage, wherein each of the switches is connected via a bus, and the server can communicate with each of the switches in real time based on the bus. Furthermore, in this embodiment, the switch at least includes a switch mainboard, multiple switch expansion boards, and a power board 8. Of course, other boards can also be configured to realize corresponding functions.

[0034] In this embodiment, the front panel of the switch mainboard or expansion board can be configured with multiple network ports and multiple optical ports, and the ports can be used based on actual conditions. For example, the ports can be connected to other modules through PHY using backplane network switching technology, or connected to the backplane through two 1000BaseX interfaces and then connected to other module boards; further, in this embodiment, the switch mainboard, multiple switch expansion boards, and the power board 8 are configured to be plugged into a backplane, so that the overall chassis of the switch is highly integrated, which is convenient for subsequent management and maintenance.

[0035] In a possible embodiment of the utility model, the switch mainboard further includes: a switch GPIO expansion module 5, a switch LED expansion module 9, and an MCU control unit;

[0036] The output end of the power board 8 is electrically connected to the power end of the switch GPIO expansion module 5, the power end of the switch LED expansion module 9, and the power end of the MCU control unit;

[0037] The switch GPIO expansion module 5 is configured on the switch main chip 1, the switch LED expansion module 9 is used to connect the LED light configured on the first panel 7 and the LED port on the CPCI connector, and the MCU control unit is used to connect the switch main chip 1 and the communication port on the CPCI connector.

[0038] It should be noted that the introduction of the GPIO expansion module is used to realize the general IO interface connection between the switch and external devices, which expands the application scenarios and flexibility of the system. Various external sensors, controllers, etc. can be connected through GPIO to realize advanced functions such as status monitoring and environmental adaptation.

[0039] Furthermore, by configuring the LED expansion module, an LED indicator light can be configured for each of the ports configured on the wall panel, and a visual indication of the operating status of each port can be provided. Maintenance personnel can quickly determine whether the port is normal based on the status of the LED light and quickly locate the fault point, thereby improving operation and maintenance efficiency.

[0040] Furthermore, the MCU control unit can be configured to control the power-on sequence to improve the stability and reliability of the system. At the same time, the MCU control unit can reset the switch main chip 1. Once an abnormality occurs in the switch chip, there is no need to restart the entire system, and a local reset can be completed through the MCU, further improving the system reliability.

[0041] In a possible embodiment of the present utility model, the MCU control unit includes: a switch flash 2, and an MCU chip 3;

[0042] The switch flash 2 is electrically connected to the MCU chip 3 and the switch main chip 1 through an SPI interface, and the MCU chip 3 is electrically connected to a communication port configured on a CPCI connector.

[0043] It should be noted that, by storing in an independent switch flash2 module, a firmware storage space can be provided for the switch main maintenance chip, thereby realizing the update of the main chip firmware. The MCU chip 3 is connected to the switch flash2 via the SPI interface, and can conveniently read and write firmware data. Furthermore, by connecting the MCU chip 3 to the SPI interface of the switch main chip 1, the MCU can not only upgrade and update the main chip hardware online, but also reset the main chip and perform status detection, providing powerful customized management capabilities. The MCU chip 3 is electrically connected to the communication port on the CPCI connector, so that the MCU can realize data communication with the host computer system or monitoring center, and complete the following functions:

[0044] a) Upload the operating status of the switch system to the center for centralized monitoring; b) Receive configuration instructions from the center to complete remote configuration management of each module of the system; c) Receive the firmware upgrade package and complete the remote online upgrade of the switch main chip 1 firmware through the SPI interface.

[0045] It should be noted that the switch communication between the MCU module and the central system realizes the customized management of the switch system, greatly reducing the workload of on-site manual maintenance and improving the operation and maintenance efficiency. In addition, the design of separating MCU from Flash also initializes the interface for future functional expansion, and can give the system more new functions through iterative upgrades of the MCU infrastructure.

[0046] In a possible embodiment of the present utility model, the first network transceiver module includes: a first network transformer 6 and a first gigabit network transceiver 4;

[0047] The first Gigabit network transceiver 4 is electrically connected to the switch main chip 1 , and the first Gigabit network transceiver 4 is electrically connected to a plurality of connection ports configured on the first panel 7 through the first network transformer 6 .

[0048] It should be noted that the use of the first network transceiver module to decouple the switch main chip 1 from the external electrical port interface can improve the level and reliability of the overall circuit design. The network transceiver module has a built-in optical fiber network transceiver chip, which can support a transmission bandwidth of up to 1000Mbps and adapt to application scenarios with various bandwidth requirements. The network transceiver is electrically connected to the main chip, and the data flow is direct, avoiding additional protocol conversion overhead, and can obtain lower latency and a large amount of throughput. The network transceiver is connected to the panel interface through a network transformer. The network transformer provides advantages such as signal isolation and elimination of ground current loops, effectively improving electromagnetic compatibility and anti-interference capabilities.

[0049] In a possible embodiment of the present utility model, the second network transceiver module includes: a second network transformer 12 and a second gigabit network transceiver 13;

[0050] The second Gigabit network transceiver 13 is electrically connected to the second CPCI connector 14 via two QSGMIIs, and the second Gigabit network transceiver 13 is electrically connected to a plurality of connection ports configured on the second panel 11 via the second network transformer 12 .

[0051] It should be noted that the second network transceiver module design similar to that of the main board is adopted on the expansion board to ensure the efficient consistency and scalability of the system. Both the main board and the expansion board can be connected to external network devices. It is connected through the second gigabit network transceiver 13 and two QSGMII interfaces. QSGMII is a high-speed serial interface that can provide up to 5Gbps of transmission bandwidth, which fully meets the needs of future network development. At the same time, the second network transceiver is also connected to the CPCI link connector, and can interact with the MCU control unit through the CPCI link to realize customized functions such as status monitoring and configuration management.

[0052] The second network transceiver has a built-in optical fiber transceiver chip, which is connected to multiple electrical ports on the expansion board panel through a network transformer, maintaining the same high bandwidth, low latency, and high anti-interference network performance as the main board module. Furthermore, through the organic combination of the main board and the expansion board, it provides excellent network interface flexibility, and you can choose to use 8, 16 or 24 interfaces or more according to actual conditions, to meet the differentiated needs of different application scenarios to the maximum extent.

[0053] In a possible embodiment of the present invention, the plurality of connection ports configured on the first panel 7 are 8 1000Base-T ports, and the plurality of connection ports configured on the second panel 11 are 8 1000Base-T ports.

[0054] It should be noted that the 1000Base-T Ethernet electrical port adopts the 1000Base-T standard. This twisted pair-based isolation interface has the advantages of short distance, long transmission distance, and strong anti-interference ability, which is very suitable for application scenarios in statistical environments such as rail transit. The bandwidth is sufficient to meet most real-time video, audio, and data transmission needs, providing high-speed and reliable network support for PIS broadcasting, monitoring and other services at railway stations.

[0055] In a possible embodiment of the utility model, it also includes: a backup power supply board 8;

[0056] The output end of the backup power board is electrically connected to the power end of the switch mainboard and the power ends of the plurality of switch expansion boards.

[0057] It should be noted that the addition of a backup power board realizes power backup and greatly improves the reliability of the entire switch system. Once a power supply fails, the backup power supply can be seamlessly switched to ensure the continuous normal operation of the system and avoid the risk of paralysis of the entire system caused by a single point of failure.

[0058] A switch for rail transit provided by the utility model is configured in a chassis by configuring a switch mainboard, multiple switch expansion boards, and a power board 8, and the output end of the power board 8 is electrically connected to the power end of the switch mainboard and the power end of multiple switch expansion boards. At the same time, the switch mainboard is electrically connected to multiple connection ports configured on a first panel 7 through a first network transceiver module, the switch mainboard is connected to a bus through a first CPCI connector 10, multiple connection ports on a second panel 11 on the switch expansion board are electrically connected to a second network transceiver module, and the second network transceiver module is electrically connected to the bus through a second CPCI connector 14. A server or workstation can control devices connected to the switch based on the bus, thereby solving the problem that decentralized independent switches cannot perform unified status monitoring and upgrades.

[0059] The above are only preferred implementations of the present utility model. The protection scope of the present utility model is not limited to the above embodiments. All technical solutions under the concept of the present utility model belong to the protection scope of the present utility model.

Claims

1. A switch for rail transit, characterized in that: include: A switch mainboard, multiple switch expansion boards, and a power board; Wherein, the output end of the power board is electrically connected to the power end of the switch mainboard and the power ends of the plurality of switch expansion boards; The switch mainboard includes a switch main chip, a first network transceiver module, and a plurality of connection ports configured on a first panel, wherein the switch main chip is electrically connected to the plurality of connection ports configured on the first panel through the first network transceiver module, and the switch main chip is connected to the bus through a first CPCI connector; Each of the switch expansion boards includes a second network transceiver module and a plurality of connection ports configured on a second panel, wherein the plurality of connection ports configured on the second panel are electrically connected to the second network transceiver module, and the second network transceiver module is connected to the bus via a second CPCI connector.

2. A switch for rail transit according to claim 1, characterized in that: The switch mainboard also includes: a switch GPIO expansion module, a switch LED expansion module, and an MCU control unit; Wherein, the output end of the power board is electrically connected to the power end of the switch GPIO expansion module, the power end of the switch LED expansion module, and the power end of the MCU control unit; The switch GPIO expansion module is configured on the switch main chip, the switch LED expansion module is used to connect the LED lamp configured on the first panel and the LED port on the CPCI connector, and the MCU control unit is used to connect the switch main chip and the communication port on the CPCI connector.

3. A switch for rail transit according to claim 2, characterized in that: The MCU control unit includes: a switch flash and an MCU chip; The switch flash is electrically connected to the MCU chip and the switch main chip through an SPI interface, and the MCU chip is electrically connected to a communication port configured on a CPCI connector.

4. A switch for rail transit according to claim 1, characterized in that: The first network transceiver module includes: a first network transformer and a first gigabit network transceiver; The first Gigabit network transceiver is electrically connected to the switch main chip, and the first Gigabit network transceiver is electrically connected to a plurality of connection ports configured on the first panel through the first network transformer.

5. A switch for rail transit according to claim 1, characterized in that: The second network transceiver module includes: a second network transformer and a second gigabit network transceiver; The second gigabit network transceiver is electrically connected to the second CPCI connector via two QSGMIIs, and the second gigabit network transceiver is electrically connected to a plurality of connection ports configured on the second panel via the second network transformer.

6. A switch for rail transit according to claim 1, characterized in that: The multiple connection ports configured on the first panel are 8 1000Base-T ports.

7. A switch for rail transit according to claim 1, characterized in that: The multiple connection ports configured on the second panel are 8 1000Base-T ports.

8. A switch for rail transit according to claim 1, characterized in that: Also includes: Backup power board; The output end of the backup power board is electrically connected to the power end of the switch mainboard and the power ends of the plurality of switch expansion boards.

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