Beidou maintenance method, system, equipment and medium for jettisoning recorder

Abstract

The present invention provides a Beidou maintenance method, system, device, and medium for a jettison recorder, relating to the field of avionics technology. The method comprises: a maintenance management device sends a Beidou maintenance state entry instruction to a data management module of the jettison recorder device via an Ethernet bus; the data management module writes a Beidou maintenance state entry flag to a predetermined status register address within its internal FPGA logic unit; when the FPGA logic unit detects that the flag value is the Beidou maintenance state entry flag, the RS422 bus path between the FPGA logic unit and the maintenance management device, as well as the Beidou module, is connected, and maintenance instructions are sent to the Beidou module via the maintenance management device to perform maintenance work. The present invention performs functional maintenance on the Beidou module within the jettison recorder without disassembling the jettison recorder, thereby shortening product maintenance time and ensuring product service life.

Description

Technical Field

[0001] The present invention relates to the field of aviation electronics technology, and in particular to a Beidou maintenance method, system, equipment and medium for a jettisoned recorder. Background Art

[0002] A jettison recorder is a device used to record aircraft flight data. In the event of an aircraft crash and the conditions for jettisoning the recorder are met, it automatically jettisons and separates from the aircraft, landing or floating on the water. Its built-in Beidou positioning module transmits signals to searchers, allowing them to locate the recorder, effectively shortening the search time.

[0003] The core of the drop recorder's Beidou positioning function is that after the internal Beidou module starts working, it sends short messages to the Beidou satellite navigation system at a certain frequency, calculates its precise location, and then sends short messages containing this location information to the designated Beidou receiving device (Beidou command aircraft). During this process, the drop recorder's internal Beidou module must read its own ID, the Beidou receiving device ID, and maintain the Beidou positioning mode.

[0004] Beidou maintenance requires the use of a dedicated control computer with Beidou maintenance capabilities, and the Beidou module has only one RS422 interface. Since the Beidou module is installed inside the jettison recorder, this interface needs to communicate with the jettison recorder's internal data service module. Therefore, the Beidou module's communication interface cannot be connected to the jettison recorder's external maintenance interface for maintenance. The traditional method of maintaining the Beidou module inside the jettison recorder requires first removing the jettison recorder from the aircraft, then disassembling the jettison recorder, removing the internal Beidou module that needs maintenance, and then using ground maintenance equipment to perform separate offline maintenance via the RS422 bus interface. After maintenance is completed, the jettison recorder needs to be assembled and then installed back to its original location on the aircraft. This method not only prolongs product maintenance time, but also easily damages some hardware during the disassembly and assembly of the product's internal modules, reducing the product's service life.

[0005] Therefore, it is necessary to propose a new Beidou maintenance implementation method for dropping recorders to overcome or reduce the above defects. Summary of the Invention

[0006] In view of this, the embodiments of the present application provide a Beidou maintenance method, system, equipment and medium for a jettisoned recorder, so as to maintain its internal Beidou module without disassembling the jettisoned recorder, providing a more convenient Beidou maintenance solution for the jettisoned recorder.

[0007] The present application provides the following technical solution: a BeiDou maintenance method for a discarded recorder, comprising:

[0008] The maintenance management device sends a Beidou maintenance state entry instruction to the data management module of the jettisoning recorder device via the Ethernet bus;

[0009] After receiving the Beidou maintenance state entry instruction, the data management module writes the Beidou maintenance state flag to the agreed status register address in the FPGA logic unit inside the data management module through the internal bus;

[0010] The flag value of the status register address is cyclically monitored and read through the FPGA logic unit. When it is detected that the flag value is the Beidou maintenance state flag, the internal bus path between the FPGA logic unit and the CPU processor of the data management module, as well as the RS422 bus path between the FPGA logic unit and the Beidou module in the jettisoning recorder device are disconnected, and the RS422 bus path between the FPGA logic unit and the maintenance management device, as well as the Beidou module, is connected. Maintenance instructions are sent to the Beidou module through the maintenance management device and maintenance work is performed.

[0011] According to one embodiment of the present application, it also includes: in the initial state before the maintenance management device sends an instruction to enter the Beidou maintenance state to the data management module of the jettisoning recorder device, the maintenance management device and the CPU processor are connected via Ethernet communication, the FPGA logic unit and the CPU processor are connected, and the FPGA logic unit and the Beidou module are connected.

[0012] According to an embodiment of the present application, it also includes: after the maintenance management device completes the maintenance work on the Beidou module, the power-off and restarting of the dropping recording device is performed, and the dropping recording device exits the Beidou maintenance state by default after power-on initialization and enters the normal operating state.

[0013] According to an embodiment of the present application, the further comprising: after the maintenance work of the Beidou module by the maintenance management device is completed, the maintenance management device sends an exit Beidou maintenance state instruction to the data management module via the Ethernet bus;

[0014] After receiving the exit Beidou maintenance state instruction, the data management module writes the exit Beidou maintenance state flag to the agreed status register address in the FPGA logic unit through the internal bus;

[0015] The flag value of the status register address is cyclically monitored and read through the FPGA logic unit. When it is detected that the flag value is the exit Beidou maintenance status flag, the RS422 bus path between the FPGA logic unit and the maintenance management equipment, as well as the Beidou module, is disconnected, and the internal bus path between the FPGA logic unit and the CPU processor of the data management module, as well as the RS422 bus path between the FPGA logic unit and the Beidou module are connected, and the Beidou maintenance status is exited and the normal operating status is entered.

[0016] According to one embodiment of the present application, in the data management module, the FPGA logic unit is communicatively connected to the maintenance and management equipment through a first RS422 interface chip; and the FPGA logic unit is communicatively connected to the Beidou module through a second RS422 interface chip.

[0017] According to an embodiment of the present application, before the maintenance management device sends an instruction to enter the Beidou maintenance state to the data management module of the jettisoning recorder device through the Ethernet bus, the maintenance management device further includes:

[0018] After the maintenance management device and the throwing recorder device are powered on, the status register, Ethernet bus interface, and RS422 interface in the throwing recorder device are initialized;

[0019] The maintenance management device sends a handshake message to the discarding recorder device. After the handshake is successful, the discarding recorder device returns a handshake success message to the maintenance management device.

[0020] According to one embodiment of the present application, after the data management module receives the instruction to enter the Beidou maintenance status, it writes the Beidou maintenance status flag to the agreed status register address in the FPGA logic unit inside the data management module through the internal bus, and also includes: the data management module returns an instruction confirmation message to the maintenance management device.

[0021] This application also provides a BeiDou maintenance system for a jettisoned recorder, including:

[0022] Maintenance and management equipment and a jettison recorder device, wherein the jettison recorder device includes a data management module and a Beidou module, and the data management module includes a CPU processor and an FPGA logic unit;

[0023] The maintenance and management device is connected to the CPU processor via an Ethernet bus, the FPGA logic unit is connected to the maintenance and management device via an RS422 bus, the FPGA logic unit is connected to the Beidou module via an RS422 bus, and the FPGA logic unit is connected to the CPU processor via an internal bus;

[0024] The maintenance management device is used to send a Beidou maintenance state instruction to the data management module of the jettisoning recorder device via the Ethernet bus;

[0025] The data management module is used to write the Beidou maintenance state flag to the agreed status register address in the FPGA logic unit inside the data management module through the internal bus after receiving the Beidou maintenance state instruction;

[0026] The FPGA logic unit is used to cyclically monitor and read the flag value of the status register address. When it is detected that the flag value is the Beidou maintenance status flag, the internal bus path between the FPGA logic unit and the CPU processor, as well as the RS422 bus path between the FPGA logic unit and the Beidou module are disconnected, and the RS422 bus path between the FPGA logic unit and the maintenance management device, as well as the Beidou module, is connected. Maintenance instructions are sent to the Beidou module through the maintenance management device and maintenance work is performed.

[0027] The present application also provides a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the above-mentioned Beidou maintenance method for the jettisoned recorder is implemented.

[0028] The present application also provides a computer-readable storage medium, which stores a computer program for executing the above-mentioned Beidou maintenance method for the discarded recorder.

[0029] Compared to the prior art, the beneficial effects achieved by at least one of the above-mentioned technical solutions employed in the embodiments of this specification include at least the following: The embodiments of the present invention provide a method for implementing Beidou maintenance for a jettisoned recorder based on the RS422 bus, providing a more convenient Beidou maintenance solution for jettisoned recorders. This Beidou maintenance method for jettisoned recorders allows functional maintenance of the Beidou module within the recorder without disassembling it, shortening maintenance time and avoiding damage to certain hardware during assembly and disassembly of the internal module, thereby ensuring the product's service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0031] Figure 1 1. It is a flowchart of a Beidou maintenance method for a discarded recorder according to an embodiment of the present invention;

[0032] Figure 2 It is a structural diagram of the Beidou maintenance system for dropping recorders according to an embodiment of the present invention. DETAILED DESCRIPTION

[0033] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0034] The following describes the embodiments of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the absence of conflict, the features in the following embodiments and embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative work are within the scope of protection of this application.

[0035] like Figure 1 As shown, an embodiment of the present invention provides a Beidou maintenance method for a discarded recorder, comprising:

[0036] The maintenance management device sends a Beidou maintenance state entry instruction to the data management module of the jettisoning recorder device via the Ethernet bus;

[0037] After receiving the Beidou maintenance state entry instruction, the data management module writes the Beidou maintenance state flag to the agreed status register address in the FPGA logic unit inside the data management module through the internal bus;

[0038] The flag value of the status register address is cyclically monitored and read through the FPGA logic unit. When it is detected that the flag value is the Beidou maintenance state flag, the internal bus path between the FPGA logic unit and the CPU processor of the data management module, as well as the RS422 bus path between the FPGA logic unit and the Beidou module in the jettisoning recorder device are disconnected, and the RS422 bus path between the FPGA logic unit and the maintenance management device, as well as the Beidou module, is connected. Maintenance instructions are sent to the Beidou module through the maintenance management device and maintenance work is performed.

[0039] In this embodiment, it also includes: in the initial state before the maintenance management device sends an instruction to enter the Beidou maintenance state to the data management module of the jettisoning recorder device, the maintenance management device and the CPU processor are connected via Ethernet communication, the FPGA logic unit and the CPU processor are connected, and the FPGA logic unit and the Beidou module are connected.

[0040] In one embodiment: after the maintenance management device completes the maintenance work on the Beidou module, the drop recording device is powered off and restarted. After the drop recording device is powered on and initialized, it exits the Beidou maintenance state by default and enters the normal operating state.

[0041] In another embodiment: after the maintenance work of the Beidou module by the maintenance management device is completed, the maintenance management device sends an exit Beidou maintenance state instruction to the data management module via the Ethernet bus;

[0042] After receiving the exit Beidou maintenance state instruction, the data management module writes the exit Beidou maintenance state flag to the agreed status register address in the FPGA logic unit through the internal bus;

[0043] The flag value of the status register address is cyclically monitored and read through the FPGA logic unit. When it is detected that the flag value is the exit Beidou maintenance status flag, the RS422 bus path between the FPGA logic unit and the maintenance management equipment, as well as the Beidou module, is disconnected, and the internal bus path between the FPGA logic unit and the CPU processor of the data management module, as well as the RS422 bus path between the FPGA logic unit and the Beidou module are connected, and the Beidou maintenance status is exited and the normal operating status is entered.

[0044] During specific implementation, in the data management module, the FPGA logic unit is communicatively connected to the maintenance and management equipment via a first RS422 interface chip; and the FPGA logic unit is communicatively connected to the Beidou module via a second RS422 interface chip.

[0045] During specific implementation, before the maintenance management device sends an instruction to enter the Beidou maintenance status to the data management module of the jettisoning recorder device through the Ethernet bus, it also includes: after the maintenance management device and the jettisoning recorder device are powered on, the status register, Ethernet bus interface, and RS422 interface in the jettisoning recorder device are initialized; handshake information is sent to the jettisoning recorder device through the maintenance management device, and after the handshake is successful, the jettisoning recorder device returns a handshake success information to the maintenance management device.

[0046] In specific implementation, after the data management module receives the instruction to enter the Beidou maintenance status, it writes the Beidou maintenance status flag to the agreed status register address in the FPGA logic unit inside the data management module through the internal bus, and also includes: the data management module returns an instruction confirmation message to the maintenance management device.

[0047] like Figure 2 As shown, the present application also provides a BeiDou maintenance system for dropping recorders, including:

[0048] Maintenance and management equipment and a jettison recorder device, wherein the jettison recorder device includes a data management module and a Beidou module, and the data management module includes a CPU processor and an FPGA logic unit;

[0049] The maintenance and management device is connected to the CPU processor via an Ethernet bus, the FPGA logic unit is connected to the maintenance and management device via an RS422 bus, the FPGA logic unit is connected to the Beidou module via an RS422 bus, and the FPGA logic unit is connected to the CPU processor via an internal bus;

[0050] The maintenance management device is used to send a Beidou maintenance state instruction to the data management module of the jettisoning recorder device via the Ethernet bus;

[0051] The data management module is used to write the Beidou maintenance state flag to the agreed status register address in the FPGA logic unit inside the data management module through the internal bus after receiving the Beidou maintenance state instruction;

[0052] The FPGA logic unit is used to cyclically monitor and read the flag value of the status register address. When it is detected that the flag value is the Beidou maintenance status flag, the internal bus path between the FPGA logic unit and the CPU processor, as well as the RS422 bus path between the FPGA logic unit and the Beidou module are disconnected, and the RS422 bus path between the FPGA logic unit and the maintenance management device, as well as the Beidou module, is connected. Maintenance instructions are sent to the Beidou module through the maintenance management device and maintenance work is performed.

[0053] The working mechanism of the Beidou maintenance method for discarding recorders in this embodiment is as follows:

[0054] During the Beidou maintenance process, the dedicated control computer with Beidou maintenance functions plays the role of the Beidou maintenance management equipment for the jettison recorder (hereinafter referred to as the maintenance management equipment). The external interface of the jettison recorder data management module (hereinafter referred to as the data management module) is designed with two RS422 bus interfaces and one Ethernet bus interface. One RS422 bus interface and one Ethernet interface are both connected to the maintenance management equipment, and the other RS422 bus interface is connected to the Beidou module for the jettison recorder. Inside the data management module, the FPGA chip is designed with three groups of IO pins corresponding to three groups of internal bus interfaces. Two groups of IO pins are connected to the two RS422 buses of the external interface through the RS422 interface chip, and the other group of IO pins is connected to a serial bus interface of the CPU processor inside the data management module. The specific composition and connection structure diagram is as follows. Figure 2 shown.

[0055] The specific maintenance implementation process is as follows:

[0056] (1) When Beidou maintenance is not being performed, in the initial state, the FPGA program of the data management module defaults to internal bus 1 being idle, and internal bus 2 and internal bus 3 being connected. At this time, the Beidou module can communicate with the data management module through the RS422 bus 2 interface. In addition, the maintenance management equipment is connected to the data management module through an Ethernet interface, and Ethernet interface communication can be performed;

[0057] (2) When Beidou maintenance is required, the maintenance management device sends a Beidou maintenance state command packet to the data management module through the Ethernet bus interface. For example, the packet format is: command word 1 (0xC0) + auxiliary command (0x00);

[0058] (3) After the data management mode receives the command to enter the Beidou maintenance state, it first writes the Beidou maintenance state flag (e.g., 0xAA for entering the Beidou maintenance state, 0x55 for exiting the Beidou maintenance state, and 0x55 for the power-on initial value) to the status register address agreed upon by the FPGA (e.g., 0x004FE006), and then responds with a command packet to the maintenance management device. For example, the packet format is: command word 1 (0xC0) + auxiliary command (e.g., 0xAA);

[0059] (4) The FPGA program cyclically monitors and reads the flag value of the status register address. When it detects that the flag value is the Beidou maintenance status flag (e.g., the status value is 0xAA), it disconnects the internal bus 2 and internal bus 3, and then connects the internal bus 1 and internal bus 2. At this time, the RS422 bus 1 interface and the RS422 bus 2 interface are connected, and the maintenance management equipment can directly communicate with the Beidou module via RS422 to perform Beidou maintenance-related instructions;

[0060] (5) After Beidou maintenance is completed, the drop recorder can be directly powered off and restarted. The product will exit the Beidou maintenance state by default and enter the normal operation state when it is powered on. You can also use the maintenance management device to send the Beidou maintenance state exit command instruction packet to the data management module through the Ethernet bus interface. For example, the packet format is: command word 2 (0xC1) + auxiliary command (0x00);

[0061] (6) After receiving the exit Beidou maintenance state command, the data management mode writes the exit Beidou maintenance state flag (e.g., the state value is 0x55) to the status register address agreed upon by the FPGA, and then responds with a command packet to the maintenance management device. For example, the packet format is: command word 2 (0xC1) + auxiliary command (e.g., 0xAA);

[0062] (7) The FPGA program cyclically monitors the flag value of the status register address. When it detects that the flag value is the Beidou maintenance state exit flag (e.g., the status value is 0x55), it disconnects internal bus 1 from internal bus 2 and then connects internal bus 2 to internal bus 3. At this point, the data management module can resume RS422 communication with the Beidou module, exit the Beidou maintenance state, and resume normal operation.

[0063] The embodiment of the present invention can use the RS422 bus for communication without disassembling the jettison recorder device, realize the Beidou maintenance function, and improve the maintainability of the jettison recorder. The embodiment of the present invention provides a safer and easier to maintain method for the Beidou module of the jettison recorder.

[0064] In one embodiment, a computer device is provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the above-mentioned Beidou maintenance method for the jettisoned recorder is implemented.

[0065] Specifically, the computer device may be a computer terminal, a server, a microprocessor or a similar computing device.

[0066] In this embodiment, a computer-readable storage medium is provided, which stores a computer program for executing the above-mentioned Beidou maintenance method for dropping a recorder.

[0067] Specifically, computer-readable storage media include permanent and non-permanent, removable and non-removable media that can be used to store information by any method or technology. The information can be computer-readable instructions, data structures, program modules or other data. Examples of computer-readable storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassettes, tape disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device.

[0068] Obviously, those skilled in the art should understand that the various modules or steps of the above-mentioned embodiments of the present invention can be implemented using a general-purpose computing device, they can be concentrated on a single computing device, or distributed across a network composed of multiple computing devices. Alternatively, they can be implemented using program code executable by the computing device, so that they can be stored in a storage device and executed by the computing device. In some cases, the steps shown or described can be performed in a different order than herein, or they can be made into separate integrated circuit modules, or multiple modules or steps can be made into a single integrated circuit module for implementation. Thus, the embodiments of the present invention are not limited to any specific combination of hardware and software.

[0069] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A Beidou maintenance method for discarding recorders, characterized in that: include: The maintenance management device sends a Beidou maintenance state entry instruction to the data management module of the jettison recorder device via the Ethernet bus; After receiving the Beidou maintenance state entry instruction, the data management module writes the Beidou maintenance state flag to the agreed status register address in the FPGA logic unit inside the data management module through the internal bus; The flag value of the status register address is cyclically monitored and read through the FPGA logic unit. When it is detected that the flag value is the Beidou maintenance state flag, the internal bus path between the FPGA logic unit and the CPU processor of the data management module, as well as the RS422 bus path between the FPGA logic unit and the Beidou module in the jettisoning recorder device are disconnected, and the RS422 bus path between the FPGA logic unit and the maintenance management device, as well as the Beidou module, is connected. Maintenance instructions are sent to the Beidou module through the maintenance management device and maintenance work is performed.

2. The Beidou maintenance method for discarding recorders according to claim 1 is characterized in that: Also includes: In the initial state before the maintenance management device sends an instruction to enter the Beidou maintenance state to the data management module of the jettisoning recorder device, the maintenance management device and the CPU processor are connected via Ethernet communication, the FPGA logic unit and the CPU processor are connected via communication, and the FPGA logic unit and the Beidou module are connected via communication.

3. The Beidou maintenance method for discarding recorders according to claim 1 is characterized in that: Also includes: After the maintenance management device completes the maintenance work on the Beidou module, it powers off and restarts the drop recording device. After the drop recording device is powered on and initialized, it exits the Beidou maintenance state by default and enters the normal operating state.

4. The Beidou maintenance method for discarding recorders according to claim 1 is characterized in that: Also includes: After the maintenance work of the Beidou module by the maintenance management device is completed, the maintenance management device sends an exit Beidou maintenance state instruction to the data management module through the Ethernet bus; After receiving the exit Beidou maintenance state instruction, the data management module writes the exit Beidou maintenance state flag to the agreed status register address in the FPGA logic unit through the internal bus; The flag value of the status register address is cyclically monitored and read through the FPGA logic unit. When it is detected that the flag value is the exit Beidou maintenance status flag, the RS422 bus path between the FPGA logic unit and the maintenance management equipment, as well as the Beidou module, is disconnected, and the internal bus path between the FPGA logic unit and the CPU processor of the data management module, as well as the RS422 bus path between the FPGA logic unit and the Beidou module are connected, and the Beidou maintenance status is exited and the normal operating status is entered.

5. The Beidou maintenance method for discarding recorders according to claim 1 is characterized in that: In the data management module, the FPGA logic unit is communicatively connected to the maintenance and management equipment via a first RS422 interface chip; and the FPGA logic unit is communicatively connected to the Beidou module via a second RS422 interface chip.

6. The Beidou maintenance method for discarding recorders according to claim 1 is characterized in that: Before the maintenance management device sends an instruction to enter the Beidou maintenance state to the data management module of the jettisoning recorder device through the Ethernet bus, the maintenance management device further includes: After the maintenance management device and the throwing recorder device are powered on, the status register, Ethernet bus interface, and RS422 interface in the throwing recorder device are initialized; The maintenance management device sends a handshake message to the discarding recorder device. After the handshake is successful, the discarding recorder device returns a handshake success message to the maintenance management device.

7. The Beidou maintenance method for discarding recorders according to claim 1 is characterized in that: After the data management module receives the instruction to enter the Beidou maintenance status, it writes the Beidou maintenance status flag to the agreed status register address in the FPGA logic unit inside the data management module through the internal bus, and also includes: the data management module returns an instruction confirmation message to the maintenance management device.

8. A BeiDou maintenance system for jettisoning recorders, characterized in that: include: Maintenance and management equipment and a jettison recorder device, wherein the jettison recorder device includes a data management module and a Beidou module, and the data management module includes a CPU processor and an FPGA logic unit; The maintenance and management device is connected to the CPU processor via an Ethernet bus, the FPGA logic unit is connected to the maintenance and management device via an RS422 bus, the FPGA logic unit is connected to the Beidou module via an RS422 bus, and the FPGA logic unit is connected to the CPU processor via an internal bus; The maintenance management device is used to send a Beidou maintenance state instruction to the data management module of the jettisoning recorder device via the Ethernet bus; The data management module is used to write the Beidou maintenance state flag to the agreed status register address in the FPGA logic unit inside the data management module through the internal bus after receiving the Beidou maintenance state instruction; The FPGA logic unit is used to cyclically monitor and read the flag value of the status register address. When it is detected that the flag value is the Beidou maintenance status flag, the internal bus path between the FPGA logic unit and the CPU processor, as well as the RS422 bus path between the FPGA logic unit and the Beidou module are disconnected, and the RS422 bus path between the FPGA logic unit and the maintenance management device, as well as the Beidou module, is connected. Maintenance instructions are sent to the Beidou module through the maintenance management device and maintenance work is performed.

9. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the computer program, the Beidou maintenance method for a jettisoned recorder according to any one of claims 1 to 7 is implemented.

10. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a computer program for executing the Beidou maintenance method for a jettisoned recorder according to any one of claims 1 to 7.

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