Direct-current level output type component aging visual automatic detection system

Abstract

The invention relates to a direct-current level output type component aging visualization automatic detection system. A power supply module provides required working voltage for each module; the protection module monitors the working voltage and current conditions of each module, and when the working voltage and the working current in each module exceed limits, the protection module automatically cuts off a power supply of a corresponding part to play a protection role; the mechanical wheel selection device is used for gating the aging board and outputting a level voltage; the AD acquisition module is used for performing analog-to-digital conversion on the input level voltage and then transmitting the level voltage into the upper computer through a bus; the control module mainly comprises an MCU (Microprogrammed Control Unit) and is used for controlling the stepping motor by receiving an instruction of an upper computer; and the upper computer is used for issuing a command, receiving the digital quantity converted by the AD acquisition module, calculating, processing and analyzing the digital quantity, sending out a prompt and an alarm, displaying the output level voltage values of each station of the aging board on a display, and automatically inputting information to an online database at the same time for the remote mobile access terminal to access.

Description

Technical Field

[0001] The invention relates to a DC level output type component aging visual automatic detection system, belonging to the field of component reliability test. Background Art

[0002] Components are the basic units of electronic equipment and systems, and aerospace models are usually used in special occasions and environments. The components in them often need to withstand high-intensity mechanical, temperature, humidity, electromagnetic and other environmental stresses. Therefore, these situations determine that reliability becomes one of the first factors to be considered for components. Its importance is no less than the electrical performance indicators of the components themselves. Therefore, the reliability of aerospace components is receiving more and more attention.

[0003] Integrated circuits are an important category of components. Due to their complex structure and manufacturing processes, integrated circuits induce various defects during the production process of single crystal pulling, cutting, grinding, polishing, epitaxy, lithography, diffusion, evaporation and sputtering, resulting in the reliability level of integrated circuits failing to meet the design index requirements. Some defects directly lead to functional failure or electrical parameter drift of the device when the integrated circuit is produced. These devices can be eliminated through electrical testing; some defects will not affect the electrical performance indicators of the device temporarily, but will cause device failure due to continuous stimulation of various stresses during subsequent use. As the basic unit of electronic equipment, the failure of a circuit can paralyze the entire system and cause huge losses. Therefore, integrated circuits, especially aerospace integrated circuits, need to undergo a variety of reliability screening tests before use to expose their existing fault defects as early as possible, so as to achieve the purpose of improving the reliability level of circuit use.

[0004] Aging test is a reliability screening method widely used in industrial production, especially in electronic manufacturing and aerospace industries, to reduce or eliminate premature failures of products. It is very important to improve product quality and reliability, reduce losses caused by premature failures, and reduce warranty and maintenance costs.

[0005] At present, the aging test of electronic components generally uses a multimeter or oscilloscope to manually determine whether the device output is normal, which has the problems of low efficiency and risk of missed detection. Moreover, the test can only be carried out at room temperature with the door of the high-temperature oven open, and it is impossible to monitor the output status of the components in real time during the high-temperature aging test. The output status of the device is uncontrollable, and there are major quality risks, which directly affect the effectiveness and accuracy of the aging test. In the face of the increasing number of aerospace model missions and future aerospace development trends, the aging test of semiconductor devices for aerospace needs to design a low-cost, high-efficiency, reusable DC level output type component aging visualization automatic detection system to ensure that the device status can be monitored at all times during the entire aging test process, and to ensure that the device is in a controlled state during the entire aging test process to obtain the most realistic aging test data. Summary of the invention

[0006] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and achieve low-cost, high-efficiency, visual and automatic detection requirements for component aging tests.

[0007] The purpose of the present invention is achieved through the following technical solutions:

[0008] A DC level output type component aging visual automatic detection system, including a power module, a protection module, a mechanical round-robin device, an AD acquisition module, a control module, a host computer, a display and an alarm device, and a remote mobile access terminal;

[0009] The power module provides the required working voltage to each module; the protection module monitors the working voltage and current of each module. When the working voltage and working current of each module exceed the limit, the protection module automatically cuts off the power supply of the corresponding part to play a protective role;

[0010] The mechanical wheel selection device is mainly composed of a circular PCB board, a stepper motor, a metal bracket with an insulating layer, a metal spring probe, a connector interface, and an electromagnetic lifter; wherein the surface of the circular PCB is provided with a ring pad group, the pads on the ring are detection contacts, the arrangement order corresponds to the output lead-out terminals of each station of the aging board, the spacing between the pads is equal, and they are connected to the connector interface through PCB routing, the stepper motor is installed at the center of the ring pad group, the shaft of the stepper motor is fixed to the metal bracket with an insulating layer, and a metal spring probe is set at the end of the metal bracket with an insulating layer. The metal spring probe is used to contact the ring pad contact on the circular PCB board, and the top of the metal spring probe is connected to the input end of the AD acquisition module through a wire. When the electromagnetic lifter receives the "raise" or "lower" command from the host computer, it will lift or lower the metal bracket with an insulating layer to a fixed height as a whole. When the whole is lifted, the stepper motor can rotate a fixed angle according to the instruction of the MCU to align vertically with the detection point of the next station; when the whole is lowered, the metal spring probe is connected to the detection point of the current station to prepare for voltage acquisition;

[0011] The AD acquisition module performs sample-and-hold operations on the input level voltage, converts the analog voltage value into digital quantity and stores it in the register of the ADC integrated circuit, and then transmits it to the host computer through the bus after conversion by the 485 converter; the control module is mainly MCU, which controls the stepper motor by receiving instructions from the host computer; the function of the host computer is to send the "start detection" command to the control module, and receive the digital quantity converted by the AD acquisition module and perform calculation, processing and analysis, compare the result with the set threshold value, issue a prompt, control the alarm device to issue an alarm command, and present the output level voltage value of each station of the aging board on the display, and automatically enter the information into the online database for access by remote mobile access terminals.

[0012] In one embodiment of the present invention, the power module is mainly composed of a transformer, a rectifier bridge, a filter, and a voltage converter. The 220V AC power is converted into 36V AC power through the transformer, converted into 36V DC power through the rectifier bridge, and the harmonics and burr interference are filtered out by the filter. Finally, the voltage converter provides the corresponding working voltage for each module.

[0013] In one embodiment of the present invention, the AD acquisition module is mainly composed of an operational amplifier, an ADC integrated circuit, and a 485 converter circuit. The function of the operational amplifier is to form a voltage follower. Since the input impedance of the operational amplifier circuit is very high and there is almost no current input, it will not affect the device to be tested during the detection process; the function of the ADC integrated circuit is to sample the analog voltage and convert it into a digital quantity and store it in an internal register. The 485 converter circuit converts the digital quantity in the register from a TTL signal to an RS485 signal and transmits it to the host computer.

[0014] In one embodiment of the present invention, the control module is mainly composed of an MCU, a motor driver chip, and a USB bus adapter. The MCU is connected to a host computer via the USB bus adapter. After receiving a rotation command from the host computer, the MCU outputs a control signal to the motor driver chip. The motor driver chip is used to drive a stepper motor.

[0015] In one embodiment of the present invention, the host computer sends a motor rotation command through the USB serial port, which is output to the mechanical wheel selection device through the MCU of the control module to control the running state of the stepper motor; sends a command to control the electromagnetic lifter of the mechanical wheel selection device to perform the lifting operation; reads the data of the holding register in the AD acquisition module through the 485 bus, calculates the data and converts it into a measured voltage value through a program, and compares it with a preset threshold value. Once the preset threshold value is exceeded, the alarm device is immediately controlled to alarm and send an alarm prompt and abnormal status information to the remote mobile access terminal. The system writes the measured voltage value result into a table on the visual interface.

[0016] In one embodiment of the present invention, the host computer automatically enters information into an online database, provides historical status viewing of all device output states, generates data reports, statistical graphs, and data statistical analysis functions.

[0017] In one embodiment of the present invention, the remote mobile access terminal can access the device output status database through the Internet to view alarm conditions and abnormal status information.

[0018] A detection method based on the component aging visualization automatic detection system comprises:

[0019] The host computer program starts to initialize, the visual interface report is cleared, and each module is placed in the initial state. The host computer sends a motor rotation command to the MCU through the USB serial port to control the metal bracket with an insulating layer of the mechanical wheel selection device to rotate to the center point of the position of Pad1 on the PCB board. The host computer program controls the electromagnetic lifter to descend, and the metal spring probe is connected to Pad1. At the same time, the top wire of the metal spring probe is also connected to the input end of the AD acquisition module, that is, the output of the aging device has been transmitted to the input end of the AD acquisition module. The host computer program controls the signal conversion module to work, converts the output signal into an RS485 signal and transmits it to the host computer. After the host computer judges and processes the data, it outputs it to the report, and the host computer program controls the electromagnetic lifter to rise , the metal spring probe is disconnected from Pad1, and the host computer sends a motor rotation command to the MCU through the USB serial port. The motor controls the metal bracket with an insulating layer of the mechanical wheel selection device to rotate to the center point of the position of Pad2 on the PCB board, and completes the inspection of Pad1~Padn in sequence; during the aging monitoring process, when the data in the report deviates from the set threshold, the system will automatically turn on the sound and light alarm device, mark it in the data report, and remind the user to proceed with the follow-up processing. After the last Pad detection is completed, the host computer sends a return to origin command to control the metal bracket with an insulating layer of the mechanical wheel selection device to rotate to the Pad1 point for the second round of inspection operations, and then repeat the above content until the aging process is completed.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] (1) Compared with the prior art, the present invention can replace the traditional repetitive operation of manually using an oscilloscope to check the output waveform or a multimeter to measure the voltage, and does not need to open the high-temperature box door, and can automatically detect the device output when the device is aged at high temperature;

[0022] (2) Compared with the prior art, the present invention can automatically cycle through the output voltage value of each device and generate data information on the host computer, and record the data in real time;

[0023] (3) Compared with the prior art, the present invention is flexible and can automatically and regularly complete batch aging device output testing according to the testing frequency set by the user;

[0024] (4) Compared with the prior art, the present invention uses a stepping motor to switch the detection channels output by each device. Compared with the switching methods using analog switches, relays, etc., this method has the characteristics of high safety, reliability, high precision, and fast response speed;

[0025] (5) Compared with the prior art, the present invention adopts a vertical lifting platform design, which eliminates the influence of the probe positioning deviation caused by friction, so that the probe positioning is accurate and stable;

[0026] (6) Compared with the prior art, the present invention adopts a step-by-step movement method, with accurate movement position and fast response speed;

[0027] (7) Compared with the prior art, the present invention can judge the inspection result according to the voltage threshold set by the user. If the detection voltage exceeds the set voltage threshold, the buzzer alarm is immediately triggered. Compared with the traditional method of relying on the on-duty personnel to regularly check the changes in the power supply current of the entire board, the device with abnormal status can be intuitively discovered and located;

[0028] (8) Compared with the prior art, the present invention has scalability and the number of detection channels is not limited. According to the actual needs of users, the detection channels can be expanded to increase the detection scale, thereby adapting to the aging plates with various numbers of workstations;

[0029] (9) Compared with the prior art, the present invention has an aging status database, which can be used to view the historical status of all device output states, generate data reports, statistical graphs, and perform data statistical analysis;

[0030] (10) Compared with the prior art, the present invention utilizes Internet technology to automatically enter the output status information into an online database, and the information in the database can be accessed anytime and anywhere through the supporting mobile terminal application. And abnormal alarm prompts can be received in the first place. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is the schematic diagram of the design of a visual automatic detection system for aging of DC level output components.

[0032] Figure 2 This is a schematic diagram of control module signal transmission.

[0033] Figure 3 This is a schematic diagram of the control module.

[0034] Figure 4 This is a schematic diagram of a mechanical wheel selection device.

[0035] Figure 5 This is a schematic diagram of the signal conversion module.

[0036] Figure 6 This is a schematic diagram of the power module.

[0037] Figure 7 This is a schematic diagram of the old refining box. DETAILED DESCRIPTION

[0038] To make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0039] A DC level output type component aging visual automatic detection system is designed from the aspects of high reliability, high precision, high efficiency and wide applicability. It mainly includes power module, protection module, mechanical round-robin device, AD acquisition module, control module, host computer, display and alarm device, remote mobile access terminal and other parts. The design principle diagram is as follows Figure 1 shown.

[0040] The power module provides the required working voltage to the control module, AD acquisition module, mechanical selection device and other modules / components; the protection module mainly monitors the working voltage and current of each module / component in the system. When the working voltage and working current in each module / component exceed the limit, in order to avoid abnormal system operation caused by overvoltage and overcurrent, the protection module automatically cuts off the power supply of the corresponding part to play a protective role; the mechanical selection device is composed of a circular PCB board, a stepper motor, a metal bracket with an insulating layer, a metal spring probe, a connector interface, and an electromagnetic lifter. The stepper motor receives the stepping signal sent by the MCU in the control module and rotates a fixed angle to select each detection channel in turn, and transmits the output level voltage of each station of the aging board to the subsequent module in turn. The AD acquisition module consists of an operational amplifier, an ADC integrated circuit, and a 485 converter circuit. It performs sampling and holding operations on the input level voltage, converts the analog voltage value into a digital quantity and stores it in the register of the ADC integrated circuit. After conversion by the 485 converter, it is transmitted to the host computer through the bus; the control module is mainly a single-chip microcomputer (MCU), which controls the stepper motor by receiving instructions from the host computer; the role of the host computer is to send a "start detection" command to the control module, and receive the digital quantity converted by the AD acquisition module and perform calculations and analysis, compare the result with the set threshold, issue a prompt, control the alarm device to alarm, and other commands, and present the output level voltage value of each station of the aging board on the display and automatically enter the information into the online database for access by remote mobile access terminals.

[0041] More specific:

[0042] (1) Power module

[0043] The power module is mainly composed of transformer, rectifier bridge, filter, voltage converter and other components. 220V AC is converted into 36V AC by transformer, converted into 36V DC by rectifier bridge, filtered out harmonics and burr interference by filter, and finally provided corresponding working voltage for single chip microcomputer, AD acquisition module, stepper motor, etc. by voltage converter. Figure 6 shown.

[0044] (2) Protection module

[0045] The main function of the protection module is to monitor the voltage, current and temperature of each module unit of the system. When an abnormal situation occurs in the system and causes the voltage, current and temperature of some units or the entire system to exceed the set limit threshold, the threshold alarm is triggered to shut down the power of part or the entire system to prevent the system from burning out due to abnormal conditions in various parts of the module.

[0046] (3) Mechanical round selection device

[0047] The mechanical wheel selection device is mainly composed of a circular PCB board, a stepper motor, a metal bracket with an insulating layer, a metal spring probe, a connector interface, and an electromagnetic lifter. Figure 4 As shown. The circular PCB surface is provided with a ring pad group. The pads on the ring are detection contacts. The arrangement order corresponds to the output lead-out terminals of each station of the aging board. The pads are evenly spaced and connected to the connector interface through PCB routing. The stepper motor is installed at the center of the ring pad group. The shaft of the stepper motor is fixed to the metal bracket with an insulating layer. A metal spring probe is set at the end of the metal bracket with an insulating layer. The metal spring probe is used to contact the ring pad contacts on the circular PCB board. The top of the metal spring probe is connected to the input end of the AD acquisition module through a wire. The main function of the electromagnetic lifter is to lift or lower the metal bracket with an insulating layer to a fixed height as a whole after receiving the "raise" or "lower" command from the host computer. When the whole is lifted, the stepper motor can rotate a fixed angle according to the instruction of the MCU and align vertically with the detection point of the next station. After the whole is lowered, the metal spring probe is connected to the detection point of the current station to prepare for voltage acquisition.

[0048] (4) AD acquisition module

[0049] The AD acquisition module is mainly composed of operational amplifiers, ADC integrated circuits, 485 converter circuits and other devices, such as Figure 5 As shown. The function of the operational amplifier is to form a voltage follower. Since the input impedance of the operational amplifier circuit is very high and there is almost no current input, it will not affect the device under test during the detection process. The function of the ADC integrated circuit is to sample the analog voltage and convert it into a digital quantity and store it in the internal register. The 485 converter circuit converts the digital quantity in the register from a TTL signal to an RS485 signal and transmits it to the host computer.

[0050] (5) Control module

[0051] The control module is mainly composed of MCU, motor driver chip, USB bus adapter and other components. MCU is connected to the host computer through the USB bus adapter. After receiving the rotation command from the host computer, it outputs the control signal to the motor driver chip. The motor driver chip is used to drive the stepper motor. Figure 2 and Figure 3 shown.

[0052] (6) Host computer

[0053] The motor rotation command is sent through the USB serial port and output to the mechanical wheel selection device through the MCU of the control module to control the running state of the stepper motor; the command is sent to control the electromagnetic lifter of the mechanical wheel selection device to perform the lifting operation. The data of the holding register in the AD acquisition module is read through the 485 bus, and the data is calculated and converted into a measured voltage value through the program, and compared with the preset threshold. Once the preset threshold is exceeded, the alarm device is immediately controlled to alarm and send an alarm prompt and abnormal status information to the remote mobile access terminal. The system writes the measured voltage value results into the table of the visual interface. Automatically enter information into the online database, and provide functions such as viewing the historical status of all device output states, generating data reports, statistical charts, and data statistical analysis.

[0054] (7) Display and alarm device

[0055] The display is a computer screen, and the alarm device is composed of a buzzer and a warning light.

[0056] (8) Remote Mobile Access Terminal

[0057] The remote mobile access terminal is a mobile phone application that can access the device output status database through the Internet to view alarm conditions and abnormal status information, etc.

[0058] The detection system is verified through actual detection of a device aging test, and the DCDC converter XX2805S is used as an example to illustrate.

[0059] Old refining box Figure 7As shown, the device outputs Pad1~Padn are connected to the connector interface of the mechanical round-robin device through the flat cable. After the detection device is started, the host computer program is automatically executed and initialized. The visual interface report is cleared, and each unit module is placed in the initial state. The host computer sends a motor rotation command to the MCU through the USB serial port. The motor controls the metal bracket with an insulating layer of the mechanical round-robin device to rotate to the center point of the position of Pad1 on the PCB board. The host computer program controls the electromagnetic lifter to descend, and the metal spring probe is connected to Pad1. At the same time, the top wire of the metal spring probe is also connected to the AD acquisition module input The input end, that is, the output of the aging device has been transmitted to the input end of the AD acquisition module. The host computer program controls the signal conversion module to work, converts the output signal into an RS485 signal and transmits it to the host computer. The host computer judges and processes the data and outputs it to the report. The host computer program controls the electromagnetic lifter to rise, and the metal spring probe is disconnected from Pad1. The host computer sends a motor rotation command to the MCU through the USB serial port. The motor controls the metal bracket with an insulating layer of the mechanical wheel selection device to rotate to the center point of the position of Pad2 on the PCB board, and completes the inspection of Pad1~Padn in sequence. During the aging monitoring process, when the data in the report deviates from the set threshold, the system will automatically turn on the sound and light alarm device, mark it in the data report, and remind the user to proceed with the subsequent processing. After the last Pad is detected, the host computer sends a return to origin command to control the metal bracket with an insulating layer of the mechanical wheel selection device to rotate to the Pad1 point for the second round of inspection operations. The above content is repeated until the aging process is completed.

[0060] The contents not described in detail in the specification of the present invention belong to the common knowledge of those skilled in the art.

[0061] Although the present invention has been disclosed as above in the form of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art may make possible changes and modifications to the technical solution of the present invention by using the methods and technical contents disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims

1. A DC level output type component aging visual automatic detection system, characterized in that: It includes power supply module, protection module, mechanical round-robin device, AD acquisition module, control module, host computer, display and alarm device, and remote mobile access terminal; The power module provides the required working voltage to each module; the protection module monitors the working voltage and current of each module. When the working voltage and working current of each module exceed the limit, the protection module automatically cuts off the power supply of the corresponding part to play a protective role; The mechanical wheel selection device is mainly composed of a circular PCB board, a stepper motor, a metal bracket with an insulating layer, a metal spring probe, a connector interface, and an electromagnetic lifter; wherein the circular PCB surface is provided with a ring pad group, the pads on the ring are detection contacts, the arrangement order corresponds to the output lead-out terminals of each station of the aging board, the spacing between the pads is equal, and they are connected to the connector interface through PCB routing, the stepper motor is installed at the center of the ring pad group, the shaft of the stepper motor is fixed to the metal bracket with an insulating layer, and a metal spring probe is set at the end of the metal bracket with an insulating layer. The metal spring probe is used to contact the ring pad contact on the circular PCB board, and the top of the metal spring probe is connected to the input end of the AD acquisition module through a wire. When the electromagnetic lifter receives the "raise" or "lower" command from the host computer, it will lift or lower the metal bracket with an insulating layer to a fixed height as a whole. When the whole is lifted, the stepper motor can rotate a fixed angle according to the instruction of the MCU to align vertically with the detection point of the next station; when the whole is lowered, the metal spring probe is connected to the detection point of the current station to prepare for voltage acquisition; The AD acquisition module performs a sample-and-hold operation on the input level voltage, converts the analog voltage value into a digital quantity and stores it in the register of the ADC integrated circuit, and then transmits it to the host computer through the bus after conversion by the 485 converter; the control module is mainly an MCU, which controls the stepper motor by receiving instructions from the host computer; the role of the host computer is to send the "start detection" command to the control module, and receive the digital quantity converted by the AD acquisition module and perform calculation, processing and analysis, compare the result with the set threshold value, issue a prompt, control the alarm device to issue an alarm command, and present the output level voltage value of each station of the aging board on the display, and automatically enter the information into the online database for access by remote mobile access terminals.

2. The component aging visual automatic detection system according to claim 1 is characterized in that: The power module is mainly composed of a transformer, a rectifier bridge, a filter, and a voltage converter. The 220V AC power is converted into 36V AC power through a transformer, and then converted into 36V DC power through a rectifier bridge. The harmonics and burr interference are filtered out by the filter, and finally the voltage converter provides the corresponding working voltage for each module.

3. The component aging visual automatic detection system according to claim 1 is characterized in that: The AD acquisition module is mainly composed of an operational amplifier, an ADC integrated circuit, and a 485 converter circuit. The function of the operational amplifier is to form a voltage follower. Since the input impedance of the operational amplifier circuit is very high and there is almost no current input, it will not affect the device to be tested during the detection process; the function of the ADC integrated circuit is to sample the analog voltage and convert it into a digital quantity and store it in the internal register. The 485 converter circuit converts the digital quantity in the register from a TTL signal to an RS485 signal and transmits it to the host computer.

4. The component aging visual automatic detection system according to claim 1 is characterized in that: The control module is mainly composed of MCU, motor driver chip and USB bus adapter. MCU is connected to the host computer through the USB bus adapter. After receiving the rotation command from the host computer, it outputs the control signal to the motor driver chip. The motor driver chip is used to drive the stepper motor.

5. The visual automatic detection system for component aging according to claim 1 is characterized in that: The host computer sends the motor rotation command through the USB serial port, which is output to the mechanical wheel selection device through the MCU of the control module to control the running state of the stepper motor; sends commands to control the electromagnetic lifter of the mechanical wheel selection device to perform lifting operations; The data of the holding register in the AD acquisition module is read through the 485 bus, and the data is converted into a measured voltage value through calculation by the program, and compared with the preset threshold. Once the preset threshold is exceeded, the alarm device is immediately controlled to alarm and send an alarm prompt and abnormal status information to the remote mobile access terminal. The system writes the measured voltage value results into a table on the visual interface.

6. The component aging visual automatic detection system according to claim 1 is characterized in that: The host computer automatically enters information into the online database, providing historical status viewing of all device output states, generation of data reports, statistical graphs, and data statistical analysis functions.

7. The component aging visual automatic detection system according to claim 1 is characterized in that: The remote mobile access terminal can access the device output status database through the Internet to view alarm conditions and abnormal status information.

8. A detection method based on the component aging visualization automatic detection system according to claim 1, characterized in that: include: The host computer program starts to initialize, the visual interface report is cleared, and each module is placed in the initial state. The host computer sends a motor rotation command to the MCU through the USB serial port to control the metal bracket with an insulating layer of the mechanical wheel selection device to rotate to the center point of the position of Pad1 on the PCB board. The host computer program controls the electromagnetic lifter to descend, and the metal spring probe is connected to Pad1. At the same time, the top wire of the metal spring probe is also connected to the input end of the AD acquisition module, that is, the output of the aging device has been transmitted to the input end of the AD acquisition module. The host computer program controls the signal conversion module to work, converts the output signal into an RS485 signal and transmits it to the host computer. After the host computer judges and processes the data, it outputs it to the report, and the host computer program controls the electromagnetic lifter to rise , the metal spring probe is disconnected from Pad1, and the host computer sends a motor rotation command to the MCU through the USB serial port. The motor controls the metal bracket with an insulating layer of the mechanical wheel selection device to rotate to the center point of the position of Pad2 on the PCB board, and completes the inspection of Pad1~Padn in sequence; during the aging monitoring process, when the data in the report deviates from the set threshold, the system will automatically turn on the sound and light alarm device, mark it in the data report, and remind the user to proceed with the follow-up processing. After the last Pad detection is completed, the host computer sends a return to origin command to control the metal bracket with an insulating layer of the mechanical wheel selection device to rotate to the Pad1 point for the second round of inspection operations, and then repeat the above content until the aging process is completed.

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