Non-contact high-voltage daughter card test system and test method

Abstract

The invention relates to the technical field of high-voltage daughter card testing, in particular to a non-contact high-voltage daughter card testing system and method, and the system comprises a high-voltage daughter card, a high-voltage daughter card tool plate, a DC power supply, a DC power supply load, an Arduino single-chip microcomputer, a fan, an LED tester, an automatic code scanning gun, a tool, a switch, and an upper computer. The high-voltage daughter card is a test piece; the high-voltage daughter card tool plate is used for testing a high-voltage daughter card signal and burning the FRU; the direct current power supply is used for inputting 380V direct current; the direct-current power supply load is used for loading; the Arduino single chip microcomputer is used for controlling the high-voltage daughter card to be turned on and off; the fan is used for cooling the high-voltage daughter card test system; according to the non-contact high-voltage daughter card testing system, the testing efficiency can be remarkably improved, rapid and continuous testing can be achieved, uninterrupted operation is supported, the production testing capacity is greatly improved, meanwhile, through precise parameter control and an automatic testing process, the testing precision and reliability are ensured, and errors caused by manual operation are avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of high-voltage daughter card testing, and specifically to a non-contact high-voltage daughter card testing system and testing method. Background Art

[0002] Testing high-voltage daughter cards is a task that requires special attention to safety and accuracy. It should always be ensured that during the testing process, both the functions and performance of the daughter cards can be accurately evaluated, and the safety of the operators can be guaranteed.

[0003] Conventional testing methods: Ensure that the testing environment complies with all safety standards, including but not limited to a well-grounded workbench, insulated tools, and appropriate protective equipment (such as insulated gloves, goggles, etc.).

[0004] Safety measures taken: Power-off operation: Before starting any physical connection, ensure that the power supply has been completely cut off and verify that there is no residual voltage.

[0005] Double-check: Have another colleague review all the wiring and settings to prevent misoperation.

[0006] Mark warning: Set obvious warning signs around the testing area to remind others to stay away.

[0007] After that, perform function and performance tests. The main contents are as follows:

[0008] Power-on test: Manually turn on the 380V_AC to 380V_DC power supply, input it to the high-voltage daughter card, and then press the power-on button to turn on the machine.

[0009] Load test: Simulate the load conditions in the actual application scenario and observe the performance of the daughter card under different load conditions.

[0010] Stability test: Conduct a long-term running test, continuously supply power in a stable state, and monitor whether the daughter card can maintain normal operation within the specified time.

[0011] When testing high-voltage daughter cards conventionally, it is necessary to continuously adjust the DC power supply parameters and DC load parameters, etc. It is difficult to achieve full automation and non-contact during close-range testing. If any link is not noticed, there is a risk of electric shock. Moreover, the manual or semi-automatic efficiency is very low. Therefore, a non-contact high-voltage daughter card testing system and testing method are proposed to address the above problems. Summary of the Invention

[0012] The purpose of the present invention is to provide a non-contact high-voltage daughter card testing system and testing method to solve the problems that when testing high-voltage daughter cards conventionally, it is necessary to continuously adjust the DC power supply parameters and DC load parameters, etc. It is difficult to achieve full automation and non-contact during close-range testing. If any link is not noticed, there is a risk of electric shock. Moreover, the manual or semi-automatic efficiency is very low.

[0013] To achieve the above object, the present invention provides the following technical solutions:

[0014] A contactless high-voltage daughter card test system and test method, including a high-voltage daughter card, a high-voltage daughter card tooling board, a DC power supply, a DC power load, an Arduino single-chip microcomputer, a fan, an LED tester, an automatic barcode scanner, a fixture, a switch, and a host computer;

[0015] The high-voltage daughter card is a test piece;

[0016] The high-voltage daughter card tooling board is used to test the high-voltage daughter card signal and burn the FRU;

[0017] The DC power supply is used to input 380V DC power;

[0018] The DC power load is used for loading;

[0019] The Arduino single-chip microcomputer is used to control the power on and off of the high-voltage daughter card;

[0020] The fan is used to dissipate heat from the high-voltage daughter card test system;

[0021] The LED tester is used to automatically test the LED color and brightness of the high-voltage daughter card;

[0022] The automatic barcode scanner is used for automatic barcode scanning;

[0023] The fixture is used to support the power board to avoid 380V short circuit, causing damage to the board and safety risks;

[0024] The switch is used to set multiple networks as local area networks;

[0025] The host computer is used to control the entire test system, and the host computer is internally equipped with test software.

[0026] As a further optimized content of the present invention, wherein: the DC power supply and the DC power load have USB, Ethernet, and GPIB communication interfaces.

[0027] As a further optimized content of the present invention, wherein: the fixture is custom-designed according to the shape of the high-voltage daughter card and the layout of the pins, the fixture has positioning and clamping functions, and the fixture internally includes signal transmission lines, and the signal transmission lines are used to transmit test signals from the test equipment to the high-voltage daughter card, and to transmit the feedback signals of the daughter card back to the test equipment.

[0028] As a further optimized content of the present invention, wherein: the test software is used for controlling command writing and sending, the test software has a built-in error handling and feedback mechanism, and the test process of the test software is as follows: controlling the fixture to fix the high-voltage daughter card, controlling the automatic barcode scanner to automatically scan the barcode, querying the process, controlling the DC power supply to input 380V DC power, controlling the Arduino single-chip microcomputer to power on, controlling the DC power load to turn on and apply load, controlling the LED tester to automatically test the color and brightness of the LEDs on the high-voltage daughter card, controlling the high-voltage daughter card tooling board, collecting BMC UART information and writing and reading FRU, recording the test log, controlling the DC power load to disconnect the load, controlling the Arduino single-chip microcomputer to power off, controlling the DC power supply to stop outputting 380V DC power, opening the fixture, removing the tested high-voltage daughter card, and completing the test.

[0029] As a further optimized content of the present invention, wherein: the test software exchanges data with the Arduino single-chip microcomputer through serial communication, sends control instructions and receives status feedback, the test software provides a graphical user interface, allows users to set test parameters and start and stop the test, the test software displays test data in real time and generates a test report, and the test software supports automatic saving of test logs, including timestamps, test results, and error messages.

[0030] As a further optimized content of the present invention, wherein: the test software has a safety protection mechanism, the safety protection mechanism monitors the operating status of all devices in real time, and if overvoltage, overcurrent, or overheating is detected, immediately stops the test and issues an alarm, and the test software records all abnormal events and generates corresponding error reports.

[0031] As a further optimized content of the present invention, wherein: the test software includes data storage and management, and the data storage and management includes automatically saving all test data to a database, supporting historical data query, allowing users to retrieve test data according to conditions such as time, batch, and test results, providing a data export function, and supporting exporting test data in formats such as Excel and CSV.

[0032] As a further optimized content of the present invention, wherein: it includes the following steps:

[0033] Step 1: Develop special software for high-voltage daughter card testing on the host computer.

[0034] Step 2: Control the fixture to fix the high-voltage daughter card.

[0035] Step 3: The automatic barcode scanner is connected to the host computer software through USB or serial port, scans the barcode or QR code on the high-voltage daughter card, the host computer software queries the database according to the scanned information, obtains the specifications and test requirement information of the high-voltage daughter card, and automatically configures test parameters according to the query results.

[0036] Step 4: The host computer software communicates with the DC power supply through the GPIB, USB or Ethernet interface, sends a voltage setting instruction, the DC power supply outputs 380V DC power according to the instruction, and monitors the output voltage and current in real time. The host computer software records the output status of the DC power supply and automatically stops the test in case of an abnormality;

[0037] Step 5: Control the Arduino single-chip microcomputer to power on: The host computer software sends a power-on instruction to the Arduino single-chip microcomputer through the serial port. After receiving the instruction, the Arduino single-chip microcomputer controls the power switch of the high-voltage daughter card tooling board through the relay to realize the power-on operation of the high-voltage daughter card. The Arduino single-chip microcomputer returns the power-on status to the host computer software to confirm successful power-on;

[0038] Step 6: Control the DC power supply load to start pulling the load: The host computer software communicates with the DC power supply load through the GPIB, USB or Ethernet interface, sends a load setting instruction, the DC power supply load applies a preset load value according to the instruction, and monitors the load current and voltage in real time. The host computer software records the working status of the DC power supply load and automatically stops the test in case of an abnormality;

[0039] Step 7: Control the LED tester to automatically test the color and brightness of the LEDs on the high-voltage daughter card: The LED tester is connected to the host computer software through the USB or serial port, receives the test instruction, the LED tester automatically detects the LEDs on the high-voltage daughter card, measures their color and brightness, and returns the results to the host computer software. The host computer software judges whether the LEDs are qualified according to the preset standard and records the test results;

[0040] Step 8: Control the high-voltage daughter card tooling board to collect BMC UART information and read / write FRU: The host computer software communicates with the high-voltage daughter card tooling board through the USB_I2C interface, reads the BMC UART information, and according to the test requirements, the host computer software writes data to the specified address and register of the BMC to complete the read / write operation of the FRU. The host computer software records the BMC UART information and FRU data and generates the corresponding test log;

[0041] Step 9: Control the DC power supply load to disconnect the load: The host computer software communicates with the DC power supply load through the GPIB, USB or Ethernet interface, sends a load disconnection instruction, the DC power supply load stops applying the load according to the instruction, and returns the disconnection status to the host computer software. The host computer software records the disconnection status of the DC power supply load and confirms that the load has been completely removed;

[0042] Step Ten: Control the Arduino single-chip microcomputer to shut down: The host computer software sends a shutdown command to the Arduino single-chip microcomputer through the serial port. After receiving the command, the Arduino single-chip microcomputer controls the power switch of the high-voltage daughter card tooling board through the relay to implement the shutdown operation of the high-voltage daughter card. The Arduino single-chip microcomputer returns the shutdown status to the host computer software to confirm the successful shutdown;

[0043] Step Eleven: Control the DC power supply to stop outputting 380V DC power: The host computer software communicates with the DC source through the GPIB, USB or Ethernet interface, sends a stop output command, and the DC power supply stops outputting 380V DC power according to the command and returns the stop status to the host computer software. The host computer software records the stop status of the DC power supply and confirms that the voltage has been completely turned off;

[0044] Step Twelve: Open the fixture, remove the tested high-voltage daughter card, and complete the test: The host computer software sends a command to the fixture controller to control the fixture to open automatically. The operator removes the tested high-voltage daughter card from the fixture and performs subsequent processing. The host computer software generates a final test report and saves all test data and logs.

[0045] Compared with the prior art, the beneficial effects of the present invention are:

[0046] In the present invention, the provided non-contact high-voltage daughter card test system can significantly improve the test efficiency, achieve fast and continuous testing, and support uninterrupted operation, thus greatly improving the production test capacity. At the same time, the system ensures the test accuracy and reliability through precise parameter control and automated test processes, avoiding errors caused by manual operations. In addition, the automated test system reduces the manual operation links, reduces the labor cost, and effectively avoids human errors through automatic data collection and recording, improves the test quality and consistency, and ensures the reliability and safety of the high-voltage daughter card. Brief Description of the Drawings

[0047] Figure 1 is a flowchart of the non-contact high-voltage daughter card test method of the present invention;

[0048] Figure 2 is a system block diagram of the non-contact high-voltage daughter card test system of the present invention. Detailed Embodiments

[0049] Please refer to Figure 1-2 and the present invention provides a technical solution:

[0050] A non-contact high-voltage daughter card test system and test method, including a high-voltage daughter card, a high-voltage daughter card tooling board, a DC power supply, a DC power load, an Arduino single-chip microcomputer, a fan, an LED tester, an automatic barcode scanner, a fixture, a switch, and a host computer;

[0051] The high-voltage daughter card is a test piece;

[0052] The high-voltage daughter card tooling board is used to test the high-voltage daughter card signal and burn the FRU;

[0053] The DC power supply is used to input 380V DC power;

[0054] The DC power supply load is used for loading;

[0055] The Arduino single-chip microcomputer is used to control the power on and off of the high-voltage daughter card;

[0056] The fan is used to dissipate heat from the high-voltage daughter card test system;

[0057] The LED tester is used to automatically test the LED color and brightness of the high-voltage daughter card;

[0058] The automatic barcode scanner is used for automatic barcode scanning;

[0059] The fixture is used to support the power board to avoid 380V short circuit, causing damage to the board and safety risks;

[0060] The switch is used to set multiple networks as local area networks;

[0061] The upper computer is used to control the entire test system. There is test software inside the upper computer. It adopts a non-contact test method, reduces manual operation, improves test efficiency, avoids safety risks such as high-voltage electric shock, and at the same time improves the consistency and reliability of the test.

[0062] As a further technical solution of this scheme, the DC power supply and the DC power supply load are equipped with USB, Ethernet, and GPIB communication interfaces, support multiple communication methods, enhance the compatibility of the equipment, enable the test system to flexibly adapt to different test environments and equipment, and improve the stability and accuracy of data transmission;

[0063] As a further technical solution of this scheme, the fixture is custom-designed according to the shape of the high-voltage daughter card and the layout of the pins. The fixture has positioning and clamping functions. The fixture internally contains signal transmission lines. The signal transmission lines are used to transmit test signals from the test equipment to the high-voltage daughter card, and transmit the feedback signals of the daughter card back to the test equipment, accurately fix the high-voltage daughter card, ensure stable signal connection during testing, avoid errors caused by manual operation, and improve the reliability and repeatability of the test;

[0064] As a further technical solution for the implementation of this solution, the test software is used to write and send control commands. The test software has a built-in error handling and feedback mechanism. The test process of the test software is as follows: control the fixture to fix the high-voltage daughter card, control the automatic barcode scanner to scan barcodes automatically, query the process, control the DC power supply to input 380V DC power, control the Arduino single-chip microcomputer to power on, control the DC power load to turn on and apply load, control the LED tester to automatically test the color and brightness of the LEDs on the high-voltage daughter card, control the high-voltage daughter card tooling board, collect BMC UART information and read and write FRU, record the test log, control the DC power load to disconnect the load, control the Arduino single-chip microcomputer to power off, control the DC power supply to stop outputting 380V DC power, open the fixture, remove the tested high-voltage daughter card, complete the test, reduce human intervention, ensure the automation and standardization of the test process, be able to respond in a timely manner in case of abnormal situations, and improve the stability and data accuracy of the test;

[0065] As a further technical solution for the implementation of this solution, the test software exchanges data with the Arduino single-chip microcomputer through serial communication, sends control instructions and receives status feedback. The test software provides a graphical user interface, allowing users to set test parameters and start and stop the test. The test software displays test data in real time and generates test reports. The test software supports automatic saving of test logs, including timestamps, test results, and error messages, visually presenting test data. Users can flexibly adjust test parameters to improve operation convenience. At the same time, the test logs are automatically saved, facilitating subsequent data analysis and management;

[0066] As a further technical solution for the implementation of this solution, the test software has a safety protection mechanism. The safety protection mechanism monitors the operating status of all devices in real time. If overvoltage, overcurrent, or overheating is detected, the test is immediately stopped and an alarm is issued. The test software records all abnormal events and generates corresponding error reports, effectively avoiding equipment damage or personnel safety accidents, enhancing the safety of the test process, and increasing the service life of the test equipment and high-voltage daughter cards;

[0067] As a further technical solution for the implementation of this solution, the test software includes data storage and management. The data storage and management include automatically saving all test data to the database, supporting historical data query, allowing users to retrieve test data according to conditions such as time, batch, and test results, providing a data export function, supporting exporting test data to formats such as Excel and CSV. All test data can be automatically archived, facilitating subsequent query and analysis, and supporting data export, which is convenient for quality control, tracing problems, and improving the test process;

[0068] As a further technical solution for the implementation of this solution, it includes the following steps:

[0069] Step 1: Develop special software for high-voltage daughter card testing on the host computer.

[0070] Step 2: Control the fixture to fix the high-voltage daughter card.

[0071] Step 3: The automatic barcode scanner is connected to the host computer software through USB or serial port, scans the barcode or QR code on the high-voltage daughter card, and the host computer software queries the database according to the scanned information to obtain the specifications and test requirement information of the high-voltage daughter card, and automatically configures the test parameters according to the query results.

[0072] Step 4: The host computer software communicates with the DC power supply through GPIB, USB or Ethernet interface, sends voltage setting instructions, and the DC power supply outputs 380V DC electricity according to the instructions, and monitors the output voltage and current in real time. The host computer software records the output status of the DC power supply and automatically stops the test in case of abnormalities.

[0073] Step 5: Control the Arduino single-chip microcomputer to power on: The host computer software sends a power-on instruction to the Arduino single-chip microcomputer through the serial port. After receiving the instruction, the Arduino single-chip microcomputer controls the power switch of the high-voltage daughter card tooling board through the relay to realize the power-on operation of the high-voltage daughter card. The Arduino single-chip microcomputer returns the power-on status to the host computer software to confirm successful power-on.

[0074] Step 6: Control the DC power supply load to start pulling load: The host computer software communicates with the DC power supply load through GPIB, USB or Ethernet interface, sends load setting instructions, and the DC power supply load applies a preset load value according to the instructions, and monitors the load current and voltage in real time. The host computer software records the working status of the DC power supply load and automatically stops the test in case of abnormalities.

[0075] Step 7: Control the LED tester to automatically test the color and brightness of the LEDs on the high-voltage daughter card: The LED tester is connected to the host computer software through USB or serial port, receives test instructions, automatically detects the LEDs on the high-voltage daughter card, measures their color and brightness, and returns the results to the host computer software. The host computer software judges whether the LEDs are qualified according to the preset standards and records the test results.

[0076] Step 8: Control the high-voltage daughter card tooling board to collect BMC UART information and read / write FRU: The host computer software communicates with the high-voltage daughter card tooling board through the USB_I2C interface to read the BMC UART information. According to the test requirements, the host computer software writes data to the specified address and register of the BMC to complete the read / write operation of the FRU. The host computer software records the BMC UART information and FRU data and generates corresponding test logs.

[0077] Step Nine: Control the DC power load to disconnect the load: The host computer software communicates with the DC power load through the GPIB, USB or Ethernet interface, sends a load disconnection instruction, the DC power load stops applying the load according to the instruction, and returns the disconnection status to the host computer software. The host computer software records the disconnection status of the DC power load and confirms that the load has been completely removed;

[0078] Step Ten: Control the Arduino single-chip microcomputer to shut down: The host computer software sends a shutdown instruction to the Arduino single-chip microcomputer through the serial port. After receiving the instruction, the Arduino single-chip microcomputer controls the power switch of the high-voltage daughter card tooling board through the relay to implement the shutdown operation of the high-voltage daughter card. The Arduino single-chip microcomputer returns the shutdown status to the host computer software to confirm the successful shutdown;

[0079] Step Eleven: Control the DC power supply to stop outputting 380V DC power: The host computer software communicates with the DC source through the GPIB, USB or Ethernet interface, sends a stop output instruction, the DC power supply stops outputting 380V DC power according to the instruction, and returns the stop status to the host computer software. The host computer software records the stop status of the DC power supply and confirms that the voltage has been completely turned off;

[0080] Step Twelve: Open the fixture, remove the tested high-voltage daughter card, and complete the test: The host computer software sends an instruction to the fixture controller to control the fixture to open automatically. The operator removes the tested high-voltage daughter card from the fixture and performs subsequent processing. The host computer software generates a final test report and saves all test data and logs. The standardized test process ensures consistent test conditions for different batches of products, reduces human errors, and improves the accuracy of the test and the quality control level of the high-voltage daughter card.

[0081] In this article, specific examples are used to elaborate on the principle and implementation method of the present invention. The description of the above examples is only used to help understand the method of the present invention and its core idea. The above is only the preferred implementation method of the present invention. It should be noted that due to the limited nature of written expression and objectively existing infinite specific structures, for those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements, retouches or changes can be made, or the above technical features can be combined in an appropriate manner; these improvements, retouches, changes or combinations, or directly applying the concept and technical solution of the invention to other occasions without improvement, should all be regarded as the protection scope of the present invention.

Claims

1. Non-contact high voltage daughter card test system, characterized by: Including high-voltage daughter card, high-voltage daughter card tooling board, DC power supply, DC power load, Arduino microcontroller, fan, LED tester, automatic barcode scanner, fixture, switch and host computer; The high voltage daughter card is a test piece; The high-voltage daughter card tooling board is used to test the high-voltage daughter card signal and burn the FRU; The DC power supply is used to input 380V DC power; The DC power supply load is used for pulling load; The Arduino single chip microcomputer is used to control the power on and off of the high voltage daughter card; The fan is used to dissipate heat for the high-voltage daughter card test system; The LED tester is used to automatically test the color and brightness of the high-voltage daughter card LED; The automatic barcode scanning gun is used for automatic barcode scanning; The fixture is used to support the power board to prevent 380V short circuit, causing board damage and safety risks; The switch is used to set up multiple networks as local area networks; The host computer is used to control the entire test system, and the host computer is internally provided with test software.

2. The contactless high voltage daughter card testing system according to claim 1, characterized in that: The DC power supply and the DC power load are provided with USB, Ethernet and GPIB communication interfaces.

3. The contactless high voltage daughter card testing system according to claim 1, characterized in that: The fixture is custom designed according to the shape of the high-voltage daughter card and the layout of the pins. The fixture has positioning and clamping functions. The fixture contains a signal transmission line, which is used to transmit the test signal from the test equipment to the high-voltage daughter card, and transmit the feedback signal of the daughter card back to the test equipment.

4. The contactless high voltage daughter card testing system according to claim 1, characterized in that: The test software is used to control command writing and sending. The test software has built-in error handling and feedback mechanisms. The test software test process is: control the fixture to fix the high-voltage daughter card, control the automatic barcode scanner to automatically scan the code, query the process, control the DC power supply to input 380V DC, control the Arduino microcontroller to start up, control the DC power load to start loading, control the LED tester to automatically test the color and brightness of the LED on the high-voltage daughter card, control the high-voltage daughter card tooling board, collect BMC UART information and write and read FRU, record the test log, control the DC power load to disconnect the loading, control the Arduino microcontroller to shut down, control the DC power supply to stop outputting 380V DC, open the fixture, remove the tested high-voltage daughter card, and complete the test.

5. The contactless high voltage daughter card testing system according to claim 1, characterized in that: The test software exchanges data with the Arduino microcontroller through serial communication, sends control instructions and receives status feedback. The test software provides a graphical user interface, allowing the user to set test parameters and start and stop the test. The test software displays the test data in real time and generates a test report. The test software supports automatic saving of test logs, including timestamps, test results, and error information.

6. The contactless high voltage daughter card testing system according to claim 1, characterized in that: The test software has a safety protection mechanism, which monitors the operating status of all devices in real time. If overvoltage, overcurrent or overheating is found, the test will be stopped immediately and an alarm will be issued. The test software records all abnormal events and generates corresponding error reports.

7. The contactless high voltage daughter card testing system according to claim 1, characterized in that: The test software includes data storage and management, which includes automatically saving all test data into a database, supporting historical data query, allowing users to retrieve test data based on time, batch, test results and other conditions, providing data export function, and supporting exporting test data into Excel, CSV and other formats.

8. The testing method of the contactless high voltage daughter card testing system according to claim 1, characterized in that: The following steps are involved: Step 1: Develop dedicated software for high-voltage daughter card testing on the host computer; Step 2: Control the fixture to fix the high-voltage daughter card; Step 3: The automatic barcode scanner is connected to the host computer software via USB or serial port to scan the barcode or QR code on the high-voltage daughter card. The host computer software queries the database based on the scanned information to obtain the specifications and test requirements of the high-voltage daughter card, and automatically configures the test parameters based on the query results; Step 4: The host computer software communicates with the DC power supply through the GPIB, USB or Ethernet interface, sends a voltage setting instruction, and the DC power supply outputs 380V DC according to the instruction and monitors the output voltage and current in real time. The host computer software records the output status of the DC power supply and automatically stops the test under abnormal circumstances; Step 5: Control the Arduino microcontroller to start up: The host computer software sends a startup command to the Arduino microcontroller through the serial port. After receiving the command, the Arduino microcontroller controls the power switch of the high-voltage daughter card tooling board through the relay to start up the high-voltage daughter card. The Arduino microcontroller returns the startup status to the host computer software to confirm that the startup is successful. Step 6: Control the DC power load to start loading: The host computer software communicates with the DC power load through the GPIB, USB or Ethernet interface, sends a load setting instruction, and the DC power load applies the preset load value according to the instruction and monitors the load current and voltage in real time. The host computer software records the working status of the DC power load and automatically stops the test in abnormal circumstances; Step 7: Control the LED tester to automatically test the color and brightness of the LED on the high-voltage daughter card: The LED tester is connected to the host computer software via USB or serial port, receives the test command, and the LED tester automatically detects the LED on the high-voltage daughter card, measures its color and brightness, and returns the result to the host computer software. The host computer software determines whether the LED is qualified according to the preset standard and records the test result; Step 8: Control the high-voltage daughter card tooling board, collect BMC UART information, and write and read FRU: The host computer software communicates with the high-voltage daughter card tooling board through the USB_I2C interface to read the BMC UART information. The host computer software writes data to the BMC specified address and register according to the test requirements to complete the FRU read and write operations. The host computer software records the BMC UART information and FRU data, and generates the corresponding test log; Step 9: Control the DC power load to disconnect and load: The host computer software communicates with the DC power load through the GPIB, USB or Ethernet interface, and sends a load disconnection instruction. The DC power load stops applying the load according to the instruction and returns the disconnection status to the host computer software. The host computer software records the disconnection status of the DC power load and confirms that the load has been completely removed; Step 10: Control the Arduino microcontroller to shut down: The host computer software sends a shutdown command to the Arduino microcontroller through the serial port. After receiving the command, the Arduino microcontroller controls the power switch of the high-voltage daughter card tooling board through the relay to shut down the high-voltage daughter card. The Arduino microcontroller returns the shutdown status to the host computer software to confirm that the shutdown is successful. Step 11: Control the DC power supply to stop outputting 380V DC power: The host computer software communicates with the DC source through the GPIB, USB or Ethernet interface, and sends a stop output command. The DC power supply stops outputting 380V DC power according to the command and returns the stop status to the host computer software. The host computer software records the stop status of the DC power supply and confirms that the voltage has been completely turned off. Step 12: Open the fixture, remove the high-voltage daughter card to complete the test: The host computer software sends instructions to the fixture controller to control the fixture to open automatically. The operator removes the high-voltage daughter card from the fixture and performs subsequent processing. The host computer software generates the final test report and saves all test data and logs.

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