CN215117503U - Bus manager BA host machine for MVB communication of train - Google Patents

Abstract

The utility model provides a bus manager BA host computer for train MVB communication belongs to the communication technology field. The bus manager BA host machine realizes communication between the bus manager BA host machine and the PC upper system through the USB interface and the serial port isolation communication module, so that the PC upper system can perform flexible data interaction with the bus manager BA host machine according to a specific communication protocol, thereby improving the flexibility of port configuration and reducing the difficulty of equipment debugging. And the host machine furthest retains the advantages of the prior art and the existing functional modules, so the equipment cost is low.

Description

Bus manager BA host machine for MVB communication of train

Technical Field

The utility model relates to a communication technology field of train, concretely relates to bus manager BA host computer for train MVB communication.

Background

On a railroad train, a Multifunction Vehicle Bus (MVB) is a standard communication medium for transmitting and exchanging data between devices. The devices connected to the MVB bus may differ in function, size, and performance, but they are all connected to the MVB bus, and exchange information through the MVB bus to form a complete communication network. The media access of the MVB is managed by a bus manager BA (bus administrator) master, which is the only bus master, and all other devices are slaves. The master device periodically polls all ports configured in the host according to a predetermined sequence to monitor port data, and at periodic intervals, the master device processes sporadic requests.

In the process of developing the slave devices, a bus manager BA master needs to be connected to the MVB bus to monitor the port data of each slave device and ensure the correctness of the data. Because the bus manager BA device is expensive and mostly re-installs the port after fixed configuration is completed, synchronous detection can only be performed after development is completed and installation is completed, and then modification is fed back according to the detection condition, which increases the difficulty in the debugging stage in the development process.

With the rapid development of a railway system, the problems of poor port configuration flexibility and large debugging difficulty in the aspect of MVB bus port data monitoring in the process of developing slave equipment are to be solved urgently, so that a bus manager BA host with dynamic port configuration is developed, and the market value is high.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming prior art's not enough and providing a bus manager BA host computer for train MVB communication, keep apart communication module through USB interface and serial ports and realize the communication between bus manager BA host computer and the PC upper system for the PC upper system can carry out nimble data interaction with bus manager BA host computer according to specific communication agreement, thereby has promoted the flexibility of port configuration, has reduced the equipment debugging degree of difficulty.

The utility model provides a following technical scheme:

a bus manager BA host for train MVB communication, which is connected with each MVB slave device on a multifunctional vehicle bus together, wherein the bus manager BA host comprises: the power supply isolation and voltage stabilization device comprises a processor module, a power supply isolation and voltage stabilization module, a first display, a second display, a third display, a fourth display, a power supply interface and a power supply switch.

The bus manager BA host machine also comprises a USB interface, a first MVB interface, a second MVB interface, a serial port isolation communication module and an MVB board card;

an MVB board card in a bus manager BA host machine carries out data interaction with each MVB slave device through a first MVB interface, a first MVB bus, a second MVB interface and a second MVB bus respectively;

a serial port isolation communication module in the bus manager BA host machine performs data interaction with a matched PC upper system through a USB interface and a USB transmission line; the PC upper system performs data interaction with a bus manager BA host according to a specific communication protocol;

inside bus manager BA host computer, carry out data interaction through between serial ports isolation communication module and the processor module, still carry out data interaction through between MVB integrated circuit board and the processor module.

Preferably, the bus manager BA host obtains a power supply required by the normal operation of the processor module, the MVB board and the serial port isolation communication module through the power interface and the power isolation voltage stabilization module.

Preferably, the first display, the second display, the third display and the fourth display are all LED displays.

The first display, the second display and the third display are used for displaying the working state of equipment, the data packet receiving and sending state of the serial port isolation communication module and the data packet receiving and sending states of the first MVB interface and the second MVB interface; the fourth display is used for displaying the output state of the power isolation and voltage stabilization module in the equipment.

Preferably, the first MVB interface and the second MVB interface are D-type MVB interface connectors, and the number of interface pins is 9;

each MVB interface comprises two MVB buses which are mutually in redundant configuration, and when any one of the two MVB buses is interfered or forced to be disconnected, data interaction is normally carried out through the other MVB bus.

The utility model provides a bus manager BA host computer for train MVB communication compares prior art and has following beneficial effect:

the port of the bus manager BA host has the dynamic configuration characteristic, so the port configuration flexibility is good, the debugging difficulty is small, and the host furthest retains the advantages of the prior art and the prior functional module, so the equipment cost is low.

Drawings

Fig. 1 is a schematic structural diagram of a bus manager BA host for train MVB communication according to the present invention;

fig. 2 is a schematic diagram of the bus manager BA host for train MVB communication provided by the utility model.

Detailed Description

The present invention will be described in further detail with reference to examples.

Example 1.

Referring to fig. 1, a bus manager BA master for train MVB communication is connected to a utility vehicle bus in common with each MVB slave device, and the bus manager BA master comprises: the LED display comprises a processor module, a power isolation and voltage stabilization module, a first display LED1, a second display LED2, a third display LED3, a fourth display LED4, a power interface and a switch.

As shown in fig. 1 and 2, the bus manager BA host further includes a USB interface, a first MVB interface, a second MVB interface, a serial port isolation communication module, and an MVB board card.

And the MVB board card in the bus manager BA host machine carries out data interaction with each MVB slave device through the first MVB interface, the first MVB bus, the second MVB interface and the second MVB bus respectively.

A serial port isolation communication module in the bus manager BA host machine performs data interaction with a matched PC upper system through a USB interface and a USB transmission line; the PC upper system performs data interaction with the bus manager BA host according to a specific communication protocol.

Inside bus manager BA host computer, carry out data interaction through between serial ports isolation communication module and the processor module, still carry out data interaction through between MVB integrated circuit board and the processor module.

In the preferred embodiment, the data transmission rate of the serial port isolation communication module is up to 921600bps, which can satisfy the requirement of simultaneously managing a plurality of MVB slave devices. The serial port isolation communication module circuit adopts an isolation design, and the voltage stabilizing module and the USB interface are isolated by the internal power supply of the equipment respectively on two sides of the isolation circuit, so that the unstable data transmission condition caused by the potential difference between the equipment and a computer is avoided, and meanwhile, the external interference can be effectively prevented from entering the equipment via the USB interface to influence the normal work of the equipment.

Further, the bus manager BA host obtains power required by normal work of the processor module, the MVB board card and the serial port isolation communication module through the power interface and the power isolation voltage stabilization module. In the preferred embodiment, the working power supply is a dc 5V voltage.

In the preferred embodiment, the power isolation and voltage stabilization module adopts an isolation power supply design, has strong anti-interference performance, can protect an internal circuit of the equipment from being damaged when an external power supply generates large interference or the power supply is reversely connected, and improves the working stability and the anti-interference performance of the equipment. The equipment adopts DC 5V voltage power supply, can use portable power sources such as treasured that charges to supply power, and convenient quick application is debugged to the scene.

Further, the first display LED1, the second display LED2, the third display LED3, and the fourth display LED4 are all LED displays.

The first display LED1, the second display LED2 and the third display LED3 are used for displaying the working state of the device, the data packet receiving and sending state of the serial port isolation communication module and the data packet receiving and sending state of the first MVB interface and the second MVB interface; the fourth display LED4 is used to display the output status of the device internal power isolation regulator module.

Further, the first MVB interface and the second MVB interface are D-type MVB interface connectors, and the number of the interface pins is 9;

each MVB interface comprises two MVB buses which are mutually in redundant configuration, and when any one of the two MVB buses is interfered or forced to be disconnected, data interaction is normally carried out through the other MVB bus.

In the preferred embodiment, two 120-ohm terminal matching resistors are arranged in the device and are respectively connected to the first MVB interface and the second MVB interface, and when the device is used, the device can be connected to one of the D-type interfaces through the short connector of the D-type connector, so that the terminal resistors are connected to the MVB bus in parallel, and the matching of differential signal transmission resistors on the MVB bus is realized.

Example 2.

The utility model provides a working principle of bus manager BA host computer for train MVB communication is shown as figure 2, and bus manager BA host computer can realize the equipment configuration function.

When the equipment is configured, firstly, the bus manager BA host sends a signal for preparing the equipment configuration to the PC upper system, then the PC upper system provides the equipment configuration data to the bus manager BA host, the bus manager BA host completes the equipment configuration according to the equipment configuration data, sends the signal for completing the equipment configuration to the PC upper system and starts the BA function.

The bus manager BA host sends a signal for preparing equipment configuration and a signal for finishing equipment configuration to the PC upper system, wherein the signal is sent by the processor and is obtained after being processed by the serial port isolation communication module, and the signal can be sent to the PC upper system through the USB interface and the transmission line.

The data signals are sent to the serial port isolation communication module through the USB interface and the transmission line, processed according to a specific communication protocol and then sent to the processor, and the processor realizes the configuration operation of the MVB board card according to the content of the equipment configuration data.

Further, the device configuration data provided by the PC upper system to the bus manager BA host includes: the device address data of the bus manager BA host and the port information data of all the MVB slave devices.

Further, the port information data of all MVB slave devices includes: port size, port type, port address.

Example 3.

The utility model provides a working principle of bus manager BA host computer for train MVB communication is as shown in figure 2, and bus manager BA host computer can realize the function of acquireing MVB slave unit port data.

When acquiring the data of the port of the MVB slave device, firstly, the PC upper system sends address data of the port of the MVB slave device to be acquired to the bus manager BA host, after receiving the address data, the bus manager BA host acquires the data of the port of the MVB slave device corresponding to the address from the MVB board card and sends the data to the PC upper system, and the PC upper system receives and displays the acquired data of the port of the MVB slave device.

The address data of the MVB slave device port for acquiring data is sent to the bus manager BA host by the PC upper system, is an address signal sent by the PC upper system, is sent to the serial port isolation communication module through the USB interface and the transmission line, is processed according to a specific communication protocol and then is sent to the processor.

The bus manager BA host receives the address data, specifically, the processor receives the address data, the processor sends an instruction for acquiring data of an MVB slave device port corresponding to the address to the MVB board card, the MVB board card acquires the data of the corresponding MVB slave device port according to the instruction and returns the data to the processor, and the processor sends the data to the serial port isolation communication module and processes the data into a data signal which can be sent to a PC upper system through a USB interface and a transmission line according to a specific communication protocol.

Further, the MVB board obtains data of the corresponding MVB slave device port according to the instruction, specifically, data of the MVB slave device port corresponding to the address read by the MVB board, and the data are sent from the MVB slave device port and sent to the MVB board through the first MVB interface, the second MVB interface, the first MVB bus and the second MVB bus.

Example 4.

The utility model provides a working principle of bus manager BA host computer for train MVB communication is as shown in fig. 2, and bus manager BA host computer can realize sending the function of MVB slave unit port data.

When transmitting the data of the port of the MVB slave device, firstly, the PC upper system transmits address data of the port of the MVB slave device to be transmitted to the bus manager BA host, and after the bus manager BA host receives the address data, the MVB board card finds the port of the MVB slave device corresponding to the address and prepares for transmitting the data. And then, the PC upper system sends data to be written in by the MVB slave equipment port corresponding to the address to the bus manager BA host, and the MVB board card sends the data to the MVB slave equipment port after the bus manager BA host receives the data.

The address data of the MVB slave device port which sends data to the bus manager BA host is the address signal sent by the PC upper system, and the address signals are sent to the serial port isolation communication module through the USB interface and the transmission line, processed according to a specific communication protocol and then sent to the processor.

The data signals are sent to the serial port isolation communication module through the USB interface and the transmission line, and are sent to the processor after being processed according to a specific communication protocol.

The bus manager BA host receives the address data, specifically, the processor receives the address data, and the processor sends an instruction to the MVB board card to prepare to send data to the MVB slave device port corresponding to the address. And the MVB board card finds the corresponding MVB slave equipment port according to the instruction. The bus manager BA host receives the data, specifically, the processor receives the data, the processor sends the data to be written in by the MVB slave device port corresponding to the address to the MVB board card, and the data is sent from the MVB board card to the MVB slave device port via the first MVB interface, the second MVB interface, the first MVB bus and the second MVB bus line.

It is right to above concrete embodiment and embodiment the utility model provides a concrete support of a bus manager BA host computer technical thought for train MVB communication can not injecing with this the utility model discloses a protection scope, everywhere according to the utility model provides a technical thought, any change or equivalent change of equivalence that do on this technical scheme basis all still belongs to the utility model discloses the scope of technical scheme protection.

Claims (4)

1. A bus manager BA host for train MVB communication, which is connected with each MVB slave device on a multifunctional vehicle bus together, wherein the bus manager BA host comprises: processor module, power isolation voltage stabilizing module, first display, second display, third display, fourth display, power source, switch, its characterized in that:

the bus manager BA host further comprises a USB interface, a first MVB interface, a second MVB interface, a serial port isolation communication module and an MVB board card;

the MVB board card in the bus manager BA host machine carries out data interaction with each MVB slave device through a first MVB interface, a first MVB bus, a second MVB interface and a second MVB bus respectively;

the serial port isolation communication module in the bus manager BA host machine performs data interaction with a matched PC upper system through a USB interface and a USB transmission line; the PC upper system performs data interaction with a bus manager BA host according to a specific communication protocol;

inside bus manager BA host computer, carry out data interaction through between serial ports isolation communication module and the processor module, still carry out data interaction through between MVB integrated circuit board and the processor module.

2. The bus manager BA host used for train MVB communication according to claim 1, wherein:

the bus manager BA host obtains power required by normal work of the processor module, the MVB board card and the serial port isolation communication module through the power interface and the power isolation voltage stabilization module.

3. The bus manager BA host used for train MVB communication according to claim 1, wherein:

the first display, the second display, the third display and the fourth display are all LED displays;

the first display, the second display and the third display are used for displaying the working state of equipment, the data packet receiving and sending state of the serial port isolation communication module and the data packet receiving and sending states of the first MVB interface and the second MVB interface; the fourth display is used for displaying the output state of the power isolation and voltage stabilization module in the equipment.

4. The bus manager BA host used for train MVB communication according to claim 1, wherein:

the first MVB interface and the second MVB interface are D-type MVB interface connectors, and the number of interface pins is 9;

each MVB interface comprises two MVB buses which are mutually in redundant configuration, and when any one of the two MVB buses is interfered or forced to be disconnected, data interaction is normally carried out through the other MVB bus.

Images