Main control unit of railway mobile communication equipment

Abstract

The utility model discloses a main control unit of railway mobile communication equipment, which comprises a processor, a writing maintenance interface, a power supply module, an external memory and an FPGA (field programmable gate array) module, the processor is arranged as the core of the main control unit, the FPGA module is used for functional programming of the main control unit, the FPGA module is matched with an RAM (random access memory) chip by adding serial port expansion, and the external memory is connected with the FPGA module. And the RAM chip is used for data interaction communication between the main control unit and each controlled unit. The main control unit and the data interface isolation chip of the railway mobile communication equipment protect the input / output interface and the hot plug, and the external memory performs basic information management of each functional unit, so that the overall efficiency of the main control unit is improved, the watchdog circuit avoids interference from an external electromagnetic field, and normal and smooth operation of a program is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of mobile communication equipment, in particular to a main control unit of railway mobile communication equipment. Background Art

[0002] The main control unit is the core component of the railway mobile communication equipment. It manages the voice communication and data communication of the equipment. It is applied to the on-board terminal equipment of the railway mobile communication system. Through the data management and task allocation of each interface, it realizes the communication mode management of the equipment and the realization of application functions, and solves the communication needs of "car-to-ground, ground-to-car" between locomotive drivers and ground staff.

[0003] Conventional main control units generally use commercial industrial control boards, on which functional application development is carried out. The advantage of this is that the development difficulty is low. The disadvantage is that commercial industrial control boards use the Win series operating system, which has a wide range of applications and complex development interfaces. Since the underlying technology of the software operating system is not open, it is easy to use abnormalities and crashes due to system vulnerabilities after application development. Utility Model Content

[0004] The utility model aims to provide a main control unit of railway mobile communication equipment to solve the problem that the software operating system proposed in the above background technology is prone to abnormal use and crash caused by system loopholes after application development.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a main control unit of a railway mobile communication device, including a processor, which is set as the core of the main control unit, and also includes a programming maintenance interface, a power module, an external memory and an FPGA module. The FPGA module is used for functional programming of the main control unit, and the FPGA module cooperates with a RAM chip by adding a serial port expansion.

[0006] Preferably, the RAM chip is used for data exchange and communication between the main control unit and each controlled unit.

[0007] The above technical solution is adopted to speed up the communication of data interaction between various functional units.

[0008] Preferably, the processor is a single chip microcomputer, and the processor ensures smooth program operation through a watchdog circuit.

[0009] By adopting the above technical solution, a watchdog circuit can be used to prevent system crashes caused by system vulnerabilities.

[0010] Preferably, the write program maintenance interface is used for writing the running program of the main control unit and maintaining the data interface.

[0011] The above technical solution makes the development interface of the programming maintenance interface simple.

[0012] Preferably, a data interface isolation chip is provided between the FPGA module and the control interface of each functional unit, and the data interface isolation chip supports hot plugging.

[0013] The above technical solution can be used to protect input and output interfaces and improve efficiency.

[0014] Preferably, the external memory is used to store comprehensive information about the operation of the communication device.

[0015] By adopting the above technical solution, some basic information such as train number, locomotive number, working mode, section name, line name, line operation database, etc. can be stored.

[0016] Preferably, the power supply module is used to ensure the normal operation of the main control unit.

[0017] The above technical solution is adopted to ensure stable operation of data communication.

[0018] Compared with the prior art, the utility model has the following beneficial effects: the main control unit of the railway mobile communication device:

[0019] 1. The main control unit of the railway mobile communication equipment uses FPGA modules to expand the serial port, uses RAM chips to speed up the data exchange communication between the functional units, uses data interface isolation chips to protect the input and output interfaces and hot plugging, and uses external memory to manage the basic information of each functional unit, thereby improving the overall efficiency of the main control unit;

[0020] 2. Furthermore, the communication adopts the FIFO principle to realize the interaction of each module and coordinate the normal operation of each module. The functions of the main control unit are programmed through the FPGA module, and the software operating system adopts the file architecture based on UCDOS to complete the development of the BSP layer + APP layer respectively;

[0021] 3. Furthermore, a watchdog circuit is provided to avoid interference from external electromagnetic fields, ensure the normal operation of data in various registers and memories, prevent program pointer errors, and prevent the program from being out of the program area, thus overcoming dead loops and ensuring smooth normal operation of the program. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the module structure of the utility model.

[0023] In the figure: processor; watchdog circuit; program maintenance interface; power module; external memory; FPGA module; RAM chip; data interface isolation chip; control interface of each functional unit. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only 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 creative work are within the scope of protection of the utility model.

[0025] See also Figure 1 The utility model provides a technical solution: a main control unit of a railway mobile communication device, including a processor, a watchdog circuit, a program maintenance interface, a power module, an external memory, an FPGA module, a RAM chip, a data interface isolation chip, and control interfaces of various functional units.

[0026] The main control unit of the railway mobile communication equipment can improve the overall efficiency of the main control unit through the hardware circuit and FPGA module self-development programming, specifically:

[0027] The processor is set as the core of the main control unit, which is characterized by: it also includes a program writing maintenance interface, a power module, an external memory and an FPGA module, the FPGA module is used for functional programming of the main control unit, the FPGA module cooperates with the RAM chip by adding a serial port expansion, the RAM chip is used for data interaction and communication between the main control unit and each controlled unit, the processor is a single-chip microcomputer, and the processor ensures smooth program operation through a watchdog circuit, the program writing maintenance interface is used for writing the program running in the main control unit and maintaining the data interface, a data interface isolation chip is provided between the FPGA module and the control interface of each functional unit, the data interface isolation chip supports hot plugging, and the power module is used to ensure the normal operation of the main control unit;

[0028] The utility model adopts a new architecture design, firstly starts the operation of the power module, and then processes the information exchange and work instructions between the modules through the processor at the core of the main control unit. When the processor is working, the watchdog circuit can avoid interference from the external electromagnetic field, ensure the normal operation of the data of various registers and memories, prevent program pointer errors, and overcome dead loops in the program area, so that the program can run smoothly. The functions of the main control unit are basically realized by programming in the FPGA module, and the serial port is expanded by using the FPGA module. The communication of data interaction between the functional units is accelerated by using the RAM chip. The data interface isolation chip can protect the input and output interfaces and hot plugging. Then, the basic information management of each functional unit is performed by using the external memory, thereby improving the overall efficiency of the main control unit.

[0029] The main control unit communicates and controls other units through the external serial port. The communication adopts the FIFO principle to realize the interaction of each module and coordinate the normal operation of each module. At the same time, according to the network situation, it completes the switching of 450MHz, 800MHz, and 900MHz communication modes to realize the transmission of dispatching commands, train number information, train stop information, and train tail data, and realizes the communication between the locomotive driver and the ground dispatching personnel.

[0030] Working principle: When using the main control unit of the railway mobile communication equipment, the core processor of the main control unit realizes information exchange and work instructions, realizes voice and data communication, and improves the overall efficiency of the main control unit and increases the overall practicality through the use of RAM chips in conjunction with the external serial port.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A main control unit of a railway mobile communication device, comprising a processor, wherein the processor is set as the core of the main control unit, and is characterized in that: It also includes a programming maintenance interface, a power module, an external memory and an FPGA module. The FPGA module is used for functional programming of the main control unit. The FPGA module cooperates with the RAM chip by adding a serial port expansion.

2. The main control unit of a railway mobile communication device according to claim 1, characterized in that: The RAM chip is used for data exchange and communication between the main control unit and each controlled unit.

3. The main control unit of a railway mobile communication device according to claim 1, characterized in that: The processor is a single chip microcomputer, and the processor ensures smooth program operation through a watchdog circuit.

4. The main control unit of a railway mobile communication device according to claim 1, characterized in that: The write program maintenance interface is used for writing the running program of the main control unit and maintaining the data interface.

5. The main control unit of a railway mobile communication device according to claim 1, characterized in that: A data interface isolation chip is provided between the FPGA module and the control interface of each functional unit, and the data interface isolation chip supports hot plugging.

6. The main control unit of a railway mobile communication device according to claim 1, characterized in that: The external memory is used to store comprehensive information of the operation of the communication device.

7. The main control unit of a railway mobile communication device according to claim 1, characterized in that: The power supply module is used to ensure the normal operation of the main control unit.

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