MVB logic control unit

Abstract

The utility model provides an MVB logic control unit, comprising an MVB core, an ARM processor, an RS232 communication circuit, a double-path redundancy CAN communication circuit and an isolation power supply, the ARM processor is connected with the MVB core, the RS232 communication circuit, the double-path redundancy CAN communication circuit and the isolation power supply; the isolation power supply is used for isolating and converting an external power supply voltage and then supplying power to an internal circuit of the MVB logic control unit; the MVB core is used for analyzing vehicle bus MVB interface data; the ARM processor communicates with the MVB core through a serial port; and the RS232 communication circuit is connected with an external RS232 communication interface. The development process of the MVB logic control unit is simple and easy to implement, complex hardware code debugging is not needed, and the development efficiency of the device is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of rail transit control, and in particular relates to an MVB logic control unit. Background Art

[0002] MVB (Multifunction Vehicle Bus) is a train-specific bus that complies with the IEC61375-1:2007 "Train Communication Network" standard. It is an open communication system used to connect train cars and different devices; the MVB bus operates at a frequency of 1.5Mbit / s and uses twisted pair or optical fiber as the medium. The MVB bus provides two transmission services at the link layer: (1) process data: periodic, source-addressed broadcast data; (2) message data: on-demand, target-addressed data packets. There is only one bus form on a vehicle. This involves a problem. The external interface of some products is fixed. When the interface of this product does not match the train bus, it can only be abandoned.

[0003] MVB boards can be implemented using MVBC (Multifunction Vehicle Bus Controller) chips or self-developed FPGA (Field-Programmable Gate Array). However, when using FPGA for development, all functions of the MVB bus defined in the IEC61375-1 protocol have the disadvantages of cumbersome development and complex debugging. Developers have to focus a lot of energy on hardware code, which increases the complexity of development and the time required for development to a certain extent. Utility Model Content

[0004] In order to solve the above problems existing in the prior art, the utility model provides an MVB logic control unit to improve the development efficiency of the device and simplify the device structure. The technical solution of this application is as follows:

[0005] An MVB logic control unit includes: an MVB core, an ARM (Advanced RISC Machine, Advanced Reduced Instruction Set Machine) processor, an RS232 (Recommended Standard 232, Recommended Standard 232) communication circuit, a dual-channel redundant CAN (Controller Area The ARM processor is connected to the MVB core, RS232 communication circuit, dual-way redundant CAN communication circuit and isolated power supply, and the isolated power supply is used to isolate and convert the external power supply voltage to power the internal circuit of the MVB logic control unit; the MVB core is used to parse the vehicle bus MVB interface data; the ARM processor communicates with the MVB core through the serial port; the RS232 communication circuit is connected to the external RS232 communication interface, and the RS232 communication circuit is used to convert the serial port level signal of the ARM processor into an RS232 level signal, or convert the RS232 level signal of the external RS232 communication interface into a serial port level signal that can be recognized by the ARM processor; the dual-way redundant CAN communication circuit is used to convert the logic level signal of the ARM processor into a CAN bus signal, or convert the CAN bus signal on the external CAN bus into a logic level signal that can be recognized by the ARM processor.

[0006] Furthermore, the logic level signal is a TTL (Transistor-Transistor Logic) level signal or a CMOS (Complementary Metal Oxide Semiconductor) level signal.

[0007] Furthermore, the external power supply voltage is 9-36V power supply voltage.

[0008] Compared with the prior art, the utility model has the following beneficial technical effects:

[0009] The MVB logic control unit of the present application can complete the functions of MVB bus management, field process control, etc., and the structure of the system is simplified due to the use of a modular architecture;

[0010] The MVB logic control unit of the present application can flexibly and efficiently perform functional redundancy and expansion, thereby significantly improving the overall performance of the device;

[0011] The development process of the MVB logic control unit of the present application is simple and easy, and does not require complicated hardware code debugging, thereby improving the efficiency of device development. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1This is a structural diagram of an MVB logic control unit of the utility model. DETAILED DESCRIPTION

[0013] In order to more clearly understand the above-mentioned purposes, features and advantages of the present invention, the present application is described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0014] like Figure 1 As shown, an MVB logic control unit includes: an MVB core, an ARM processor, an RS232 communication circuit, a dual-channel redundant CAN communication circuit and an isolated power supply, wherein the ARM processor is connected to the MVB core, the RS232 communication circuit, the dual-channel redundant CAN communication circuit and the isolated power supply, and the isolated power supply is used to isolate and convert the external power supply voltage and then supply power to the internal circuit of the MVB logic control unit; the MVB core is connected to the external vehicle bus MVB interface through the MVB bus, and the MVB core is used to parse the vehicle bus MVB interface data; the ARM processor communicates with the MVB core through the serial port; The S232 communication circuit is connected to an external RS232 communication interface, and the RS232 communication circuit is used to convert the serial port level signal of the ARM processor into an RS232 level signal, or convert the RS232 level signal of the external RS232 communication interface into a serial port level signal that can be recognized by the ARM processor; the dual-channel redundant CAN communication circuit is connected to an external CAN bus, and the dual-channel redundant CAN communication circuit is used to convert the logic level signal of the ARM processor into a CAN bus signal, or convert the CAN bus signal on the external CAN bus into a logic level signal that can be recognized by the ARM processor.

[0015] Specifically, the MVB core is used to receive data from the MVB interface of the vehicle bus, and transparently transmit the received data to the ARM processor through the serial port, or the MVB core receives data from the ARM processor through the serial port and sends it to the MVB interface of the vehicle bus through the MVB bus.

[0016] The ARM processor is used to receive data from the MVB core, and after processing, send it to the external CAN bus through the dual-channel redundant CAN communication circuit, and can send the data to the external RS232 communication interface through the RS232 communication circuit; or the ARM processor receives data from the dual-channel redundant CAN communication circuit and the RS232 communication circuit, and after processing, sends it to the MVB core through the serial port.

[0017] The dual-channel redundant CAN communication circuit is used to convert the TTL or CMOS level signal of the ARM processor into a CAN bus signal and send it to an external CAN bus, or to convert the CAN bus signal on the external CAN bus into a TTL or CMOS level signal that can be recognized by the ARM processor.

[0018] The RS232 communication circuit is used to convert the serial port level signal of the ARM processor into an RS232 level signal and send it to an external RS232 communication interface, or to convert the RS232 level signal of an external RS232 communication interface into a serial port level signal that can be recognized by the ARM processor.

[0019] Specifically, the external power supply voltage may be a 9-36V power supply voltage.

[0020] The MVB logic control unit of the present application can complete functions such as MVB bus management and field process control, and because of the modular architecture, the system structure is simplified; in addition, the development process of the MVB logic control unit of the present application is simple and easy, without the need for complex hardware code debugging, thereby improving the efficiency of device development.

[0021] The above embodiments are preferred examples for implementing the present invention, and the present invention is not limited to the above embodiments. Any non-essential additions and substitutions made by those skilled in the art based on the technical features of the present invention are within the protection scope of the present invention.

Claims

1. An MVB logic control unit, characterized in that: include: MVB core, ARM processor, RS232 communication circuit, dual-channel redundant CAN communication circuit and isolated power supply, the ARM processor is connected with the MVB core, RS232 communication circuit, dual-channel redundant CAN communication circuit and isolated power supply, the isolated power supply is used to isolate and convert the external power supply voltage and then supply power to the internal circuit of the MVB logic control unit; the MVB core is used to parse the vehicle bus MVB interface data; the ARM processor communicates with the MVB core through the serial port; the RS232 communication circuit is connected with the external RS232 communication interface, the RS232 communication circuit is used to convert the serial port level signal of the ARM processor into the RS232 level signal, or convert the RS232 level signal of the external RS232 communication interface into the serial port level signal that can be recognized by the ARM processor; the dual-channel redundant CAN communication circuit is used to convert the logic level signal of the ARM processor into the CAN bus signal, or convert the CAN bus signal on the external CAN bus into the logic level signal that can be recognized by the ARM processor.

2. An MVB logic control unit as claimed in claim 1, characterized in that: The logic level signal is a TTL level signal or a CMOS level signal.

3. An MVB logic control unit as claimed in claim 1 or 2, characterized in that: The external power supply voltage is 9-36V power supply voltage.

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