Flight control machine serial port board card

Abstract

The utility model provides a serial port board card of a flight control machine. The serial port board card comprises a bottom plate and a bottom plate bus interface located on one side of the bottom plate. An aviation plug connector, a serial port module, an isolation module, an MAX3160 multi-protocol transceiver and an FPGA (Field Programmable Gate Array) module are attached to the bottom plate; the base plate bus interface is an ISA (Interface Standard Architecture) bus interface; the aviation plug connector, the MAX3160 multi-protocol transceiver, the isolation module, the FPGA module and the bottom plate bus interface are connected in sequence, the problems that serial port resources of an existing industrial flight control computer cannot be freely configured, and a low-cost redundancy scheme is difficult to expand are solved, compared with a traditional board card, the maintenance cost is reduced, and the maintenance efficiency is improved. The hardware reliability is improved, and free configuration of a user in the later period is also facilitated.

Description

[Technical field]

[0001] The utility model relates to the technical field of serial port boards, and in particular to a serial port board with the advantages of high portability, scalability and stability. By adopting serial port isolation technology, plug-in board technology and in-situ configuration technology, a flight control computer serial port board with high reliability, high maintainability, high scalability and high usability is realized. [Background Technology]

[0002] The flight control computer is the carrier for implementing the drone control logic and is also the key link in the successful completion of the flight mission.

[0003] Common engines, sensors, actuators and other devices often use serial ports for communication, so serial port boards are often used in flight control computers to connect to related devices.

[0004] With the advancement of science and technology, flight control computers are gradually moving towards miniaturization, standardization, and high reliability. At the same time, higher requirements are also placed on the serial port boards of flight control computers.

[0005] With the maturity of single-channel flight control computers, fault-tolerant computers with higher reliability are also in a stage of rapid development. At present, the flight control computers of high-end drones in the world all use fault-tolerant technology: the Global Hawk, a high-altitude and long-endurance unmanned reconnaissance aircraft of the United States, uses dual-redundant flight control computers; the latest generation of European unmanned reconnaissance aircraft "Barracuda" and the fourth-generation Israeli unmanned aircraft "Heron" both use triple-redundant flight control computers. Taking the flight control computer of Boeing 777 as an example, it adopts a 3×3 redundancy architecture and has three identical primary flight control computer channels (PFC). Each channel consists of three non-similar branches, namely the command branch, the backup branch and the monitoring branch. The three branches use different processors, and the peripheral circuits and hardware interfaces are also different, so as to overcome common mode failures. PFC and bus are divided into three groups: left, middle and right. PFC can monitor three groups of buses at the same time, but can only transmit data to the buses in the same group. Therefore, when a bus in one group fails, it will not affect the work of the other two groups. However, the serial port boards used in the above-mentioned flight control machines all adopt stacking technology and jumper technology, which requires a series of processes such as disassembly, plugging and reinstalling of the flight control machine during maintenance and configuration modification, which is not conducive to the maintainability and ease of use of the flight control machine.

[0006] In order to achieve the standardization, redundancy and high reliability requirements of flight control computers, integrated multi-channel resource boards are particularly critical. Serial port isolation technology can ensure that the damage of a single serial port will not affect the normal operation of other serial ports. Plug-in technology can quickly replace and repair the board when it fails. In-situ configuration technology can complete functional configuration without disassembling the flight control machine. [Contents of the utility model]

[0007] The problems existing in the prior art solved by this application are:

[0008] The serial port boards used in existing flight controllers all adopt stacking technology and jumper technology. This technology requires a series of processes such as disassembly, plugging and reinstalling the flight controller during maintenance and configuration modification, which is not conducive to the maintainability and ease of use of the flight controller.

[0009] The solution to the technical problem of the utility model is:

[0010] A flight control machine serial port board is provided, comprising a baseboard and a baseboard bus interface located on one side of the baseboard; an FPGA module, an aviation plug connector, a serial port module, an isolation module and a MAX3160 multi-protocol transceiver are attached to the baseboard; the baseboard bus interface is an IS bus interface; the aviation plug connector, the MAX3160 multi-protocol transceiver, the isolation module, the FPGA module and the baseboard bus interface are connected in sequence.

[0011] Preferably, the size of the base plate is 117 mm*109 mm.

[0012] Preferably, the aviation plug connector is a 66-pin J30JA2 series quick-lock connector.

[0013] Preferably, the serial port board is a 12-way isolated RS422 / 232 / RS485 serial port card; wherein the communication protocol of 10-way serial ports is set to RS232 or RS422 through EEPROM selection, and 2-way serial ports are set to RS232 or RS422 or RS485; or, the 2-way serial ports are set to each channel's verification mode, verification enable, stop bit length and baud rate through application software, the baud rate is 230.4Kbps, and each channel has 255-node receive and send FIFOs.

[0014] Preferably, the MAX3160 multi-protocol transceiver MAX3160 is a programmable RS-232 / RS-485 / RS-422 multi-protocol transceiver; RS-232 and RS-485- / RS-422 compatibility performance with a +3V to +5.5V power supply is achieved through software configuration.

[0015] The technical effects of solving the technical problem in this application are as follows:

[0016] Compared with the prior art, the utility model provides a flight control machine serial port board that solves the problem that the serial port resources of the existing industrial flight control computers cannot be freely configured and the low-cost redundancy scheme is difficult to expand. Compared with the traditional board, it reduces the maintenance cost, improves the hardware reliability, and is convenient for later users to freely configure. [Drawings]

[0017] Figure 1 The utility model is a schematic diagram of the planar structure of a serial port board of a flight control machine.

[0018] Figure 2 The utility model is a schematic diagram of a module connection structure of a serial port board of a flight control machine. [Specific implementation method]

[0019] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit this utility model.

[0020] See also Figure 1 and Figure 2 The utility model provides a flight control machine serial port board 1, comprising a baseboard and a baseboard bus interface 11 located on one side of the baseboard; an FPGA module 12, an aviation plug connector 14, a serial port module, a MAX3160 multi-protocol transceiver and an isolation module 13 are attached to the baseboard; the baseboard bus interface 11 is an IS bus interface; the aviation plug connector 14, the MAX3160 multi-protocol transceiver, the isolation module 13, the FPGA module 12 and the baseboard bus interface 11 are connected in sequence.

[0021] In some other embodiments, the size of the base plate is 117 mm*109 mm.

[0022] The aviation plug connector 14 is a 66-pin J30JA2 series quick-lock connector.

[0023] The serial port board is a 12-way isolated RS422 / 232 / RS485 serial port card; wherein the communication protocol of 10-way serial ports is set to RS232 or RS422 through EEPROM selection, and 2-way serial ports are set to RS232 or RS422 or RS485; or, the 2-way serial ports are set to each way of verification mode, verification enable, stop bit length and baud rate through application software, the baud rate is 230.4Kbps, and each way has 255 nodes of receiving and sending FIFO.

[0024] The MAX3160 multi-protocol transceiver is a programmable RS-232 / RS-485 / RS-422 multi-protocol transceiver; RS-232 and RS-485- / RS-422 compatibility performance with a power supply of +3V to +5.5V is achieved through software configuration.

[0025] This patent proposes a new type of serial port board for standard flight control computers, which solves the problem that the serial port resources of existing industrial flight control computers cannot be freely configured and the low-cost redundancy solution is difficult to implement. Compared with traditional boards, it reduces maintenance costs, improves hardware reliability, and facilitates free configuration by later users;

[0026] This serial port board is a 12-channel isolated RS422 / 232 / RS485 serial port card, of which 10-channel serial port communication protocols can be set to RS232 or RS422 through EEPROM, and 2-channel can be set to RS232, RS422 or RS485; the 2-channel serial port can also set each channel's verification mode, verification enable, stop bit length and baud rate through application software, and the baud rate can reach up to 230.4Kbps. Each channel has a 255-section receive and send FIFO.

[0027] 8-bit ISA bus;

[0028] 12 isolated channels, 10 of which can be set to RS232 / 422 interface mode through EEPROM, and two of which can be set to RS232 / 422 / 485 interface mode;

[0029] The baud rate can be set in the range of 2400bps, 4800bps, 9600bps, 19200bps, 38400bps... up to 230400bps;

[0030] Data bit length (5-8 bits), stop bit length (1 bit, 1.5 bits, 2 bits), and check bit can be set through software;

[0031] Each receiving channel provides a 255-byte receiving FIFO;

[0032] Each transmit channel provides a 255-byte transmit FIFO

[0033] Added serial port isolation technology to improve reliability;

[0034] Adopt plug-in board architecture to improve maintainability and scalability;

[0035] Adopt in-situ configuration technology to improve ease of use;

[0036] The details of each module are as follows.

[0037] FPGA: FPGA mainly contains two logical functions;

[0038] Interface logic: used to receive and convert signals from the PC104 bus of the CPU board. The signals are used to control the reading and writing of the serial port control register in the FPGA, thereby realizing the control operation of the CPU board on the serial port board.

[0039] Serial port control logic: When the CPU board writes serial port data through the PC104 bus, the logic will generate a serial port timing level and send it to the MAX3160 through the isolation circuit; the level data returned from the MAX3160 will also be settled in the fifo buffer through the serial port control logic, waiting to be read by the CPU board through PC104;

[0040] (2) Isolation: By adding an isolation circuit between the MAX3160 and the FPGA, the voltage on the user side is prevented from being reversely broken down due to excessive voltage and affecting other paths.

[0041] (3) MAX3160: The MAX3160 is a programmable RS-232 / RS-485 / RS-422 multiprotocol transceiver that can be configured through software to achieve RS-232 and RS-485- / RS-422 compatibility with a +3V to +5.5V power supply.

[0042] (4) Connector: The 66-pin J30JA2 series quick-lock connector (J30JA2-66ZJW) is used. This connector supports a quick-lock structure, which can reduce the probability of poor contact between the cable connector and the board.

[0043] Before use, the user can modify the parameter configuration in the eeprom of the serial port board through the configuration software. After one configuration, it will automatically take effect each time it is powered on until the next modification. After power-on, the FPGA will read the relevant configuration parameters from the eeprom, address the board to support multi-serial port board solutions, and initialize the MAX3160 to determine that the serial port uses the RS232 / 422 / 485 format;

[0044] The technical effects of solving the technical problem in this application are as follows:

[0045] Compared with the prior art, the utility model provides a flight control machine serial port board 1 that solves the problem that the serial port resources of the existing industrial flight control computers cannot be freely configured and the low-cost redundancy scheme is difficult to expand. Compared with the traditional boards, it reduces the maintenance cost, improves the hardware reliability, and also facilitates the free configuration of the later users.

[0046] The above-described implementation methods of the utility model do not constitute a limitation on the protection scope of the utility model. Any modification, equivalent replacement and improvement made within the spirit and principle of the utility model shall be included in the protection scope of the claims of the utility model.

Claims

1. A flight control machine serial port board, characterized by: It includes a baseboard and a baseboard bus interface located on one side of the baseboard; an FPGA module, an aviation plug connector, a serial port module, an isolation module and a MAX3160 multi-protocol transceiver are attached to the baseboard; the baseboard bus interface is an IS bus interface; the aviation plug connector, the MAX3160 multi-protocol transceiver, the isolation module, the FPGA module and the baseboard bus interface are connected in sequence.

2. A flight control machine serial port board as claimed in claim 1, characterized in that: The size of the base plate is 117mm*109mm.

3. The flight control machine serial port board as claimed in claim 1, characterized in that: The aviation plug connector adopts a 66-pin core J30JA2 series quick-lock connector.

4. The flight control machine serial port board as claimed in claim 1, characterized in that: The serial port board is a 12-channel isolated RS422 / 232 / RS485 serial port card; the communication protocols of 10 channels of the serial ports are selected and set to RS232 or RS422 through EEPROM, and 2 channels are set to RS232 or RS422 or RS485; or, the 2 channels of serial ports are set to each channel's verification mode, verification enable, stop bit length and baud rate through application software, the baud rate is 230.4Kbps, and each channel has a 255-section receiving and sending FIFO.

5. The flight control machine serial port board as claimed in claim 1, characterized in that: The MAX3160 multi-protocol transceiver is a programmable RS-232 / RS-485 / RS-422 multi-protocol transceiver; RS-232 and RS-485- / RS-422 compatibility performance with a power supply of +3V to +5.5V is achieved through software configuration.

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