A teaching computer system suitable for BeiDou-1 command user terminal

Abstract

The present invention discloses a teaching machine system suitable for a BeiDou-1 command-type user terminal, comprising a host computer, a power control unit, a channel multiplexer, an external interface and a main control unit; the host computer signal is connected to the power control unit, the power control unit is electrically connected to the channel multiplexer, the channel multiplexer is electrically connected to the main control unit, the main control unit is electrically connected to the power control unit, and the external interface is connected to the power control unit, the channel multiplexer and the main control unit; the system solves the problems of irreparable damage occurring to the BeiDou-1 command-type user terminal during the process of guiding trainees in repair and inspection; it is difficult to clarify the relationship between various modules; it solves the problem of difficulty in reproducing all fault points during the process of guiding trainees in repair and inspection of the BeiDou-1 command-type user terminal; and it solves the problem of instructors being unable to provide special training on a single module during the process of guiding trainees in repair and inspection of the BeiDou-1 command-type user terminal.

Description

Technical Field

[0001] The present invention belongs to the field of teaching machines, and in particular relates to a teaching machine system suitable for a BeiDou-1 command-type user machine. Background Art

[0002] The BeiDou-1 command user terminal is a BeiDou user terminal product developed to facilitate superior command agencies to command and monitor their subordinate users through the BeiDou satellite positioning and navigation system. In addition to having all the functions of an ordinary user terminal, it can also monitor the positioning and communication information of its subordinate user terminals, and broadcast command information to subordinate user terminals.

[0003] The following shortcomings exist in the current teaching process of BeiDou-1 command user terminals for students in the maintenance and inspection of BeiDou-1 command user terminals:

[0004] The BeiDou-1 command user terminal is currently extremely valuable. It is impossible to provide each student with one during the teaching process. There is also a risk of damage during student use, making it unsuitable for student teaching.

[0005] The relationships between the various modules of the Beidou-1 command user terminal are complex. During the actual teaching process, it is difficult for students to understand the logical relationships between the modules, and the entry threshold is high.

[0006] There are many problems in the maintenance and inspection process of the Beidou-1 command user terminal. During the teaching process, it is impossible to reproduce all the current problems of the Beidou-1 command user terminal for students.

[0007] During the maintenance and inspection process of the BeiDou-1 command user terminal, the instructors were unable to conduct specialized training on the problems encountered in each module according to their own teaching methods. Summary of the Invention

[0008] In order to solve the technical problems existing in the background technology, the present invention aims to provide a teaching machine system suitable for Beidou-1 command-type user terminal, so as to solve the problem that the Beidou-1 command-type user terminal is irreparably damaged during the maintenance and inspection process of the Beidou-1 command-type user terminal for trainees; solve the problem that it is difficult to clarify the relationship between various modules during the maintenance and inspection process of the Beidou-1 command-type user terminal for trainees; solve the problem that it is difficult to reproduce all fault points during the maintenance and inspection process of the Beidou-1 command-type user terminal for trainees; solve the problem that the instructor cannot provide special training for a single module during the maintenance and inspection process of the Beidou-1 command-type user terminal for trainees.

[0009] In order to solve the technical problem, the technical solution of the present invention is:

[0010] A teaching computer system suitable for BeiDou-1 command-type user terminal, comprising: a host computer, a power control unit, a channel multiplexer, an external interface and a main control unit;

[0011] The host computer signal is connected to the power control unit, the power control unit is electrically connected to the channel multiplexer and the main control unit, the channel multiplexer is electrically connected to the main control unit, and the external interface is connected to the power control unit, the channel multiplexer and the main control unit;

[0012] The host computer sends a fault instruction or a fault relief instruction to the power control unit, the power control unit parses the fault instruction or the fault relief instruction, and executes a hardware response action or sends the hardware response action to the main control unit. After receiving the hardware response action, the main control unit executes the hardware response action or sends the hardware response action to the channel multiplexer, and the channel multiplexer executes the hardware response action.

[0013] Further, it also includes: an indicator light unit, a connector and an auxiliary battery;

[0014] The power control unit supplies power to the indicator light unit, and the indicator light unit responds to the main control unit; when the power control unit has no external power input, the auxiliary battery supplies power to the power control unit through a connector, and the indicator light unit is used to display the status information of the teaching machine.

[0015] Furthermore, the power control unit includes: an RJ45 interface, a network PHY chip, a first processor, a first TPS5450 step-down chip, a second TPS5450 step-down chip, a third TPS5450 step-down chip, a TPS55340 step-up chip, a JP1 interface, a JP2 interface, a JP3 interface, and a JP4 interface;

[0016] The RJ45 interface signal is connected to the network PHY chip, the network PHY chip signal is connected to the first processor, the JP1 interface inputs a DC19V voltage and outputs a DC19V voltage through the JP2 interface, and the JP2 interface inputs the DC19V voltage to the TPS55340 boost chip, the first TPS5450 buck chip, and the second TPS5450 buck chip;

[0017] The first TPS5450 step-down chip reduces the voltage to DC5V and inputs it to the third TPS5450 step-down chip. The third TPS5450 step-down chip reduces the DC5V voltage to DC3.3V and supplies power to the network PHY chip and the first processor.

[0018] The second TPS5450 step-down chip reduces the voltage to DC5V and supplies power to the main control unit through JP3 and to the indicator light unit through JP4;

[0019] The TPS55340 boost chip boosts the DC19V voltage to DC28V and supplies power to the channel multiplexer through the JP2 interface.

[0020] Furthermore, the channel multiplexer includes: a Beidou ATGM332D chip, a first MAX3222 serial port chip and a fourth TPS5450 step-down chip;

[0021] The fourth TPS5450 step-down chip steps down the DC28V voltage input from the JP2 interface to 5V, and then supplies power to the Beidou chip ATGM332D and the first MAX3222 serial port chip. The Beidou chip ATGM332D interacts with the first MAX3222 serial port chip, and the first MAX3222 serial port chip interacts with the main control unit through the TX and RX ports of the channel multiplexer.

[0022] Further, the main control unit includes: a second processor, a fifth TPS5450 step-down chip, a second MAX3222 serial port chip, a third MAX3222 serial port chip and a fourth MAX3222 serial port chip;

[0023] The second MAX3222 serial port chip interacts with the first MAX3222 serial port chip, the second processor interacts with the first MAX3222 serial port chip, the third MAX3222 serial port chip interacts with the second processor, the fourth MAX3222 serial port chip interacts with the second processor, and the fifth TPS5450 step-down chip reduces the DC5V voltage input by the JP3 interface to 3.3V and then supplies power to the second processor.

[0024] Furthermore, the fault instructions include: channel multiplexer power supply abnormality instruction, channel multiplexer antenna data abnormality instruction, main control unit power supply abnormality instruction, indicator light unit power supply abnormality instruction, serial port 1 power supply abnormality instruction and serial port 2 power supply abnormality instruction.

[0025] Furthermore, the fault relief instructions include: channel multiplexer power supply abnormality relief instructions, channel multiplexer antenna data abnormality relief instructions, main control unit power supply abnormality relief instructions, indicator light unit power supply abnormality relief instructions, serial port 1 power supply abnormality relief instructions and serial port 2 power supply abnormality relief instructions.

[0026] Furthermore, the hardware response action includes: the first processor controls the TPS55340 boost chip to turn on or off to simulate whether the power supply of the channel multiplexer is normal; the second processor controls the Beidou chip ATGM332D to turn on or off to simulate whether the antenna of the channel multiplexer is normal; the first processor controls the second TPS5450 step-down chip to turn on or off to simulate whether the power supply of the main control unit and the indicator light unit is normal; the second processor controls the third MAX3222 serial port chip to turn on or off to simulate whether the power supply of serial port 1 is abnormal; the second processor controls the fourth MAX3222 serial port chip to turn on or off to simulate whether the power supply of serial port 2 is abnormal.

[0027] Furthermore, the external interface includes: a DC interface, a serial port 1, a serial port 2 and an antenna interface;

[0028] The DC interface inputs a 19V DC voltage, and the 19V DC voltage is input to the JP1 interface;

[0029] The serial port 1 is electrically connected to the third MAX3222 serial port chip, and the serial port 1 is used to output Beidou serial port data and can interact with Beidou host computer software;

[0030] The serial port 2 is electrically connected to the fourth MAX3222 serial port chip, and the serial port 2 is used to monitor the data of the serial port 1 and the program upgrade of the Beidou chip ATGM332D;

[0031] The antenna interface is used to connect an external airtight antenna, and the antenna interface signal is connected to the Beidou chip ATGM332D.

[0032] Furthermore, the power control unit also includes: a JP5 interface; the JP5 interface is electrically connected to the IO control port of the main control board MCU, and the JP5 interface is used to enable the DCDC boost chip to output 28V voltage. After the main control board MCU (second processor) monitors that data needs to be sent, it will notify the power control unit MCU (first processor) of the data through the data connection JP5. The power control unit MCU enables the DCDC boost chip to output 28V voltage, which is convenient for students to detect.

[0033] Compared with the prior art, the advantages of the present invention are:

[0034] A fault instruction or a fault clearing instruction is sent to the power control unit through the upper computer, and the power control unit parses the fault instruction or the fault clearing instruction and executes a hardware response action or sends the hardware response action to the main control unit. After receiving the hardware response action, the main control unit executes the hardware response action or sends the hardware response action to the channel multiplexer, and the channel multiplexer executes the hardware response action; solves the problem that the Beidou-1 command user terminal is irreparably damaged during the maintenance and inspection guidance for trainees; solves the problem that it is difficult to clarify the relationship between various modules during the maintenance and inspection guidance for trainees of the Beidou-1 command user terminal; solves the problem that it is difficult to reproduce all fault points during the maintenance and inspection guidance for trainees of the Beidou-1 command user terminal; solves the problem that the instructor cannot provide special training for a single module during the maintenance and inspection guidance for trainees of the Beidou-1 command user terminal. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 , an overall block diagram of a teaching machine system suitable for BeiDou-1 command-type user terminal of the present invention;

[0036] Figure 2 , the overall connection diagram of the power control unit;

[0037] Figure 3 , the overall connection block diagram of the channel multiplexer;

[0038] Figure 4 , the overall connection diagram of the main control unit;

[0039] Figure 5 , system block diagram after the host computer sends instructions. DETAILED DESCRIPTION

[0040] The specific implementation of the present invention is described below in conjunction with examples:

[0041] It should be noted that the structures, proportions, sizes, etc. shown in this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which the present invention can be implemented. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in the present invention without affecting the efficacy and purpose that can be achieved by the present invention.

[0042] At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description and are not used to limit the scope of implementation of the present invention. Changes or adjustments to their relative relationships should be regarded as the scope of implementation of the present invention without substantially changing the technical content.

[0043] Example 1

[0044] like Figure 1 As shown, a teaching machine system suitable for BeiDou-1 command user terminal includes: a host computer, a power control unit, a channel multiplexer, an external interface and a main control unit;

[0045] The host computer signal is connected to the power control unit, the power control unit is electrically connected to the channel multiplexer and the main control unit, the channel multiplexer is electrically connected to the main control unit, and the external interface is connected to the power control unit, the channel multiplexer and the main control unit;

[0046] The host computer sends a fault instruction or a fault relief instruction to the power control unit, the power control unit parses the fault instruction or the fault relief instruction, and executes a hardware response action or sends the hardware response action to the main control unit. After receiving the hardware response action, the main control unit executes the hardware response action or sends the hardware response action to the channel multiplexer, and the channel multiplexer executes the hardware response action.

[0047] Further, it also includes: an indicator light unit, a connector and an auxiliary battery;

[0048] The power control unit supplies power to the indicator light unit, and the indicator light unit responds to the main control unit; when the power control unit has no external power input, the auxiliary battery supplies power to the power control unit through a connector, and the indicator light unit is used to display the status information of the teaching machine.

[0049] Further, if Figure 2 As shown, the power control unit includes: an RJ45 interface, a network PHY chip, a first processor, a first TPS5450 step-down chip, a second TPS5450 step-down chip, a third TPS5450 step-down chip, a TPS55340 step-up chip, a JP1 interface, a JP2 interface, a JP3 interface, and a JP4 interface;

[0050] The RJ45 interface signal is connected to the network PHY chip, the network PHY chip signal is connected to the first processor, the JP1 interface inputs a DC19V voltage and outputs a DC19V voltage through the JP2 interface, and the JP2 interface inputs the DC19V voltage to the TPS55340 boost chip, the first TPS5450 buck chip, and the second TPS5450 buck chip;

[0051] The first TPS5450 step-down chip reduces the voltage to DC5V and inputs it to the third TPS5450 step-down chip. The third TPS5450 step-down chip reduces the DC5V voltage to DC3.3V and supplies power to the network PHY chip and the first processor.

[0052] The second TPS5450 step-down chip reduces the voltage to DC5V and supplies power to the main control unit through JP3 and to the indicator light unit through JP4;

[0053] The TPS55340 boost chip boosts the DC19V voltage to DC28V and supplies power to the channel multiplexer through the JP2 interface.

[0054] Further, if Figure 3 As shown, the channel multiplexer includes: a Beidou ATGM332D chip, a first MAX3222 serial port chip and a fourth TPS5450 step-down chip;

[0055] The fourth TPS5450 step-down chip steps down the DC28V voltage input from the JP2 interface to 5V, and then supplies power to the Beidou chip ATGM332D and the first MAX3222 serial port chip. The Beidou chip ATGM332D interacts with the first MAX3222 serial port chip, and the first MAX3222 serial port chip interacts with the main control unit through the TX and RX ports of the channel multiplexer.

[0056] Further, if Figure 4 As shown, the main control unit includes: a second processor, a fifth TPS5450 step-down chip, a second MAX3222 serial port chip, a third MAX3222 serial port chip and a fourth MAX3222 serial port chip;

[0057] The second MAX3222 serial port chip interacts with the first MAX3222 serial port chip, the second processor interacts with the first MAX3222 serial port chip, the third MAX3222 serial port chip interacts with the second processor, the fourth MAX3222 serial port chip interacts with the second processor, and the fifth TPS5450 step-down chip reduces the DC5V voltage input by the JP3 interface to 3.3V and then supplies power to the second processor.

[0058] Furthermore, the fault instructions include: channel multiplexer power supply abnormality instruction, channel multiplexer antenna data abnormality instruction, main control unit power supply abnormality instruction, indicator light unit power supply abnormality instruction, serial port 1 power supply abnormality instruction and serial port 2 power supply abnormality instruction.

[0059] Furthermore, the fault relief instructions include: channel multiplexer power supply abnormality relief instructions, channel multiplexer antenna data abnormality relief instructions, main control unit power supply abnormality relief instructions, indicator light unit power supply abnormality relief instructions, serial port 1 power supply abnormality relief instructions and serial port 2 power supply abnormality relief instructions.

[0060] Furthermore, the hardware response action includes: the first processor controls the TPS55340 boost chip to turn on or off to simulate whether the power supply of the channel multiplexer is normal; the second processor controls the Beidou chip ATGM332D to turn on or off to simulate whether the antenna of the channel multiplexer is normal; the first processor controls the second TPS5450 step-down chip to turn on or off to simulate whether the power supply of the main control unit and the indicator light unit is normal; the second processor controls the third MAX3222 serial port chip to turn on or off to simulate whether the power supply of serial port 1 is abnormal; the second processor controls the fourth MAX3222 serial port chip to turn on or off to simulate whether the power supply of serial port 2 is abnormal.

[0061] Furthermore, the external interface includes: a DC interface, a serial port 1, a serial port 2 and an antenna interface;

[0062] The DC interface inputs a 19V DC voltage, and the 19V DC voltage is input to the JP1 interface;

[0063] The serial port 1 is electrically connected to the third MAX3222 serial port chip, and the serial port 1 is used to output Beidou serial port data and can interact with Beidou host computer software;

[0064] The serial port 2 is electrically connected to the fourth MAX3222 serial port chip, and the serial port 2 is used to monitor the data of the serial port 1 and the program upgrade of the Beidou chip ATGM332D;

[0065] The antenna interface is used to connect an external airtight antenna, and the antenna interface signal is connected to the Beidou chip ATGM332D.

[0066] Furthermore, the power control unit also includes: a JP5 interface; the JP5 interface is electrically connected to the IO control port of the main control board MCU, and the JP5 interface is used to enable the DCDC boost chip to output 28V voltage. After the main control board MCU (second processor) monitors that data needs to be sent, it will notify the power control unit MCU (first processor) of the data through the data connection JP5. The power control unit MCU enables the DCDC boost chip to output 28V voltage, which is convenient for students to detect.

[0067] Example 2

[0068] The power control unit not only serves as the power supply for each unit, but also interacts with the host computer through the RJ45 network port. The host computer controls the software to issue different faults, and then controls and dispatches the power main control unit through its own MCU microcontroller. The channel multiplexer fault is presented in the hardware, and the fault information of the main control unit and display unit is transmitted to the main control unit through the serial port.

[0069] Channel multiplexer. The channel multiplexer is used in the new BeiDou-1 command user terminal teaching machine to receive BeiDou RNSS signals mainly through the airtight antenna, and then transmit the RNSS signals to the main control unit through the serial port.

[0070] The main control unit, as the core component of the new BeiDou-1 command-type user machine teaching machine, mainly collects and analyzes data uploaded by the power control unit and the channel multiplexer.

[0071] The power control unit outputs the DC19V voltage through the DC19V power adapter, and then converts the voltage into 28V, 5V and 5V respectively through three types of DCDC voltage conversion circuits. The 5V voltage is divided into two paths. One path and the converted 28V voltage are transmitted to the main control unit and the channel multiplexer through the SIP interface. The other 5V voltage is converted into 3.3V through the DCDC conversion circuit to power the MCU microcontroller and the network PHY chip of the power supply unit. The MCU microcontroller controls the enablement of the 28V and the other 5V voltage conversion circuits through hardware field-effect transistor feedback. The host computer can send the fault type to the MCU microcontroller through the PHY chip, and the fault is reproduced through the MCU microcontroller.

[0072] The main control unit mainly controls and sends fault information through the interaction between its own main control MCU microcontroller and the power control unit MCU microcontroller as well as the data interaction with the channel multiplexer. It can realize functions such as channel multiplexer abnormality and serial port data transmission and reception abnormality, making it convenient for students to detect multiple faults on the same teaching machine.

[0073] The channel multiplexer uses the ATGM332D module to simulate Beidou RD receiving information and transmits the serial port information to the main control board through the MAX322, which facilitates further simulation by the processor. The power supply is supplied by the power board with 28V, which is converted to 3.3V by the step-down chip to power the ATGM332D module and MAX322.

[0074] like Figure 5 The process for the specific implementation method is:

[0075] The host computer (computer, handheld PAD) terminal connects to the network PHY chip through the network interface RJ45 to send the fault point of a new Beidou-1 command user terminal teaching machine to the power board main control chip STM32F107;

[0076] To simulate abnormal power supply of the channel multiplexer, the power board main control chip STM32F107 controls the opening and closing of the DCDC boost chip TPS55340 through the MOS tube on the power supply to simulate whether the power supply of the channel multiplexer is normal. When the host computer (computer, handheld PAD) terminal sends the abnormal power supply information of the channel multiplexer, the power board main control chip STM32F107 controls the MOS tube to output a low level, setting the enable pin of the DCCD boost chip TPS55340 to a low level, thereby causing the DCCD boost chip TPS55340 to have no 28V voltage output. When troubleshooting, students can use a multimeter to actually test that the DCCD boost chip TPS55340 has no 28V voltage output. When students find that the DCCD boost chip TPS55340 has no 28V voltage output, they report it to the teaching teacher, who can use the host computer software to resolve the abnormal power supply fault of the simulated channel multiplexer, so that a new type of Beidou-1 command user terminal teaching machine can resume normal operation. Follow the above steps to simulate the abnormal power supply of the main control board and the abnormal power supply of the indicator board LED.

[0077] A new type of BeiDou-1 command user machine teaching machine main control board main control chip receives the main control board through the power board main control chip, the channel multiplexer fault point is sent down and simulates the corresponding fault point. Here, the main fault description is made in detail with serial port abnormality, channel multiplexer data abnormality, antenna abnormality, indicator board LED display abnormality.

[0078] The main control board's serial port data error 1 occurs when the host computer (computer, handheld PAD) issues the "Main control board serial port 1 or 2 data error task 1" (see "Main control board serial port data error task 1"). The main control board's STM32F429 chip can shut down the main control board's serial port data output in real time, preventing the output of serial port 1 or 2. If students use an oscilloscope to measure the absence of serial data from the main control board's STM32F429 chip, they should report this to the instructor, who can then use the host computer software to resolve the main control board serial port data error 1 fault, restoring normal operation of a new BeiDou-1 command user terminal.

[0079] The main control board serial port data is abnormal 2. After the host computer (computer, handheld PAD) terminal sends the main control board serial port 1 or 2 data abnormal task 2, the main control board main control chip STM, 32F429 can use the MOS tube to pull down the DCDC power chip TPS5450 enable pin, so that the serial port chip has no power supply, and the serial port chip has no output and an abnormality occurs. When the students use an oscilloscope to measure that the main control board serial port chip 1 or 2 has no output data, they report it to the teaching teacher. The teaching teacher can use the host computer software to resolve the main control board serial port data abnormal 2 fault, so that a new type of Beidou-1 command user machine teaching machine can resume normal operation.

[0080] The channel multiplexer data is abnormal. After the host computer (computer, handheld PAD) terminal sends the channel multiplexer data abnormality, the main control board main control chip STM32F429 sends the abnormal data to the Beidou chip ATGM332D in the channel multiplexer through the UART serial port. It is the ATGM332D that outputs abnormal data. Students can use an oscilloscope to detect the ATGM332D output abnormal fault. After reporting to the teaching teacher, the teaching teacher can use the host computer software to resolve the channel multiplexer data abnormal fault, so that a new type of Beidou-1 command user machine teaching machine can resume normal operation.

[0081] When the antenna works abnormally and the terminal of the position machine (computer, handheld PAD) sends abnormal channel multiplexer data, the main control chip STM32F429 on the main control board sends the abnormal data to the Beidou chip ATGM332D in the channel multiplexer through the UART serial port, so that the ATMG332D simulates the antenna data abnormality and returns the antenna abnormality data to the main control chip through the ATGM332D serial port data. The trainees can read the abnormal data in the data feedback on the serial port assistant through the serial port 1 or serial port 2 of the teaching machine. After reporting to the teaching teacher, the teaching teacher can use the upper computer software to resolve the channel multiplexer data abnormality fault, so that a new type of Beidou-1 command user machine teaching machine can resume normal operation.

[0082] The preferred embodiments of the present invention are described in detail above, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in this field without departing from the scope of the present invention.

[0083] Many other changes and modifications can be made without departing from the spirit and scope of the present invention. It should be understood that the present invention is not limited to the specific embodiments, and the scope of the present invention is defined by the appended claims.

Claims

1. A teaching machine system suitable for BeiDou-1 command-type user terminal, characterized in that: include: Host computer, power control unit, channel multiplexer, external interface and main control unit; The host computer signal is connected to the power control unit, the power control unit is electrically connected to the channel multiplexer and the main control unit, the channel multiplexer is electrically connected to the main control unit, and the external interface is connected to the power control unit, the channel multiplexer and the main control unit; The host computer sends a fault instruction or a fault relief instruction to the power control unit, the power control unit parses the fault instruction or the fault relief instruction and executes a hardware response action or sends the hardware response action to the main control unit, after receiving the hardware response action, the main control unit executes the hardware response action or sends the hardware response action to the channel multiplexer, and the channel multiplexer executes the hardware response action; The power control unit includes: an RJ45 interface, a network PHY chip, a first processor, a first TPS5450 step-down chip, a second TPS5450 step-down chip, a third TPS5450 step-down chip, a TPS55340 step-up chip, a JP1 interface, a JP2 interface, a JP3 interface, and a JP4 interface; The RJ45 interface signal is connected to the network PHY chip, the network PHY chip signal is connected to the first processor, the JP1 interface inputs a DC19V voltage and outputs a DC19V voltage through the JP2 interface, and the JP2 interface inputs the DC19V voltage to the TPS55340 boost chip, the first TPS5450 buck chip, and the second TPS5450 buck chip; The first TPS5450 step-down chip reduces the voltage to DC5V and inputs it to the third TPS5450 step-down chip. The third TPS5450 step-down chip reduces the DC5V voltage to DC3.3V and supplies power to the network PHY chip and the first processor. The second TPS5450 step-down chip reduces the voltage to DC5V and supplies power to the main control unit through JP3 and to the indicator light unit through JP4; The TPS55340 boost chip boosts the DC19V voltage to DC28V and supplies power to the channel multiplexer through the JP2 interface.

2. The teaching computer system for BeiDou-1 command user terminal according to claim 1, characterized in that: Also included: indicator light unit, connector and auxiliary battery; The power control unit supplies power to the indicator light unit, and the indicator light unit responds to the main control unit; when the power control unit has no external power input, the auxiliary battery supplies power to the power control unit through a connector, and the indicator light unit is used to display the status information of the teaching machine.

3. The teaching computer system suitable for BeiDou-1 command user terminal according to claim 1, characterized in that: The channel multiplexer includes: a Beidou ATGM332D chip, a first MAX3222 serial port chip and a fourth TPS5450 step-down chip; The fourth TPS5450 step-down chip steps down the DC28V voltage input from the JP2 interface to 5V, and then supplies power to the Beidou chip ATGM332D and the first MAX3222 serial port chip. The Beidou chip ATGM332D interacts with the first MAX3222 serial port chip, and the first MAX3222 serial port chip interacts with the main control unit through the TX and RX ports of the channel multiplexer.

4. The teaching computer system applicable to the BeiDou-1 command user terminal according to claim 1, characterized in that: The main control unit includes: a second processor, a fifth TPS5450 step-down chip, a second MAX3222 serial port chip, a third MAX3222 serial port chip and a fourth MAX3222 serial port chip; The second MAX3222 serial port chip interacts with the first MAX3222 serial port chip, the second processor interacts with the first MAX3222 serial port chip, the third MAX3222 serial port chip interacts with the second processor, the fourth MAX3222 serial port chip interacts with the second processor, and the fifth TPS5450 step-down chip reduces the DC5V voltage input by the JP3 interface to 3.3V and then supplies power to the second processor.

5. The teaching computer system applicable to the BeiDou-1 command user terminal according to claim 4, characterized in that: The external interface includes: DC interface, serial port 1, serial port 2 and antenna interface; The DC interface inputs a 19V DC voltage, and the 19V DC voltage is input to the JP1 interface; The serial port 1 is electrically connected to the third MAX3222 serial port chip, and the serial port 1 is used to output Beidou serial port data and can interact with Beidou host computer software; The serial port 2 is electrically connected to the fourth MAX3222 serial port chip, and the serial port 2 is used to monitor the data of the serial port 1 and the program upgrade of the Beidou chip ATGM332D; The antenna interface is used to connect an external airtight antenna, and the antenna interface signal is connected to the Beidou chip ATGM332D.

6. The teaching computer system applicable to the BeiDou-1 command user terminal according to claim 1, characterized in that: The fault instructions include: channel multiplexer power supply abnormality instruction, channel multiplexer antenna data abnormality instruction, main control unit power supply abnormality instruction, indicator light unit power supply abnormality instruction, serial port 1 power supply abnormality instruction and serial port 2 power supply abnormality instruction.

7. The teaching computer system applicable to the BeiDou-1 command user terminal according to claim 1, characterized in that: The fault relief instructions include: channel multiplexer power supply abnormality relief instruction, channel multiplexer antenna data abnormality relief instruction, main control unit power supply abnormality relief instruction, indicator light unit power supply abnormality relief instruction, serial port 1 power supply abnormality relief instruction and serial port 2 power supply abnormality relief instruction.

8. The teaching computer system applicable to the BeiDou-1 command user terminal according to claim 1, characterized in that: The hardware response actions include: the first processor controls the TPS55340 boost chip to turn on or off to simulate whether the power supply of the channel multiplexer is normal; the second processor controls the Beidou chip ATGM332D to turn on or off to simulate whether the antenna of the channel multiplexer is normal; the first processor controls the second TPS5450 step-down chip to turn on or off to simulate whether the power supply of the main control unit and the indicator light unit is normal; the second processor controls the third MAX3222 serial port chip to turn on or off to simulate whether the power supply of serial port 1 is abnormal; the second processor controls the fourth MAX3222 serial port chip to turn on or off to simulate whether the power supply of serial port 2 is abnormal.

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