A direct current level output type component and device aging visual automatic detection system

Abstract

A kind of direct current level output type component aging visual automatic detection system, power module provides required operating voltage to each module;Protection module monitors the operating voltage and current of each module, when the operating voltage and operating current in each module exceed the limit, protection module automatically cuts off the power supply of the corresponding part, plays a protective role;Mechanical wheel selection device is used to select the aging board and output level voltage, AD acquisition module converts the input level voltage into digital signal and transmits it to the host computer through bus;Control module is mainly MCU, which controls the stepper motor by receiving the command of host computer;The role of host computer is to issue commands, receive digital signal converted by AD acquisition module and process analysis, issue prompt and alarm, and display the output level voltage value of each station of aging board on the display and automatically input information into online database for remote mobile access terminal access.

Description

Technical Field

[0001] This invention relates to a visual automatic detection system for aging of DC level output type components, belonging to the field of component reliability testing. Background Technology

[0002] Components are the basic units of electronic devices and systems. Aerospace models are usually used in special occasions and environments, where components often need to withstand high-intensity environmental stresses such as mechanical, temperature, humidity and electromagnetic stresses. Therefore, these conditions determine that reliability is one of the primary factors to consider for components, and its importance is no less than the electrical performance indicators of the components themselves. As a result, the reliability of aerospace components is receiving increasing attention.

[0003] Integrated circuits (ICs), as a crucial category of electronic components, suffer from complex structures and intricate manufacturing processes. These processes, including single-crystal pulling, cutting, grinding, polishing, epitaxy, photolithography, diffusion, and evaporation sputtering, introduce various defects that can cause ICs to fail to meet design specifications. Some defects directly lead to functional failure or electrical parameter drift upon completion of IC production; these devices can be eliminated through electrical testing. Other defects do not immediately affect the device's electrical performance but cause failure during subsequent use due to various stresses. As the fundamental building blocks of electronic devices, the failure of a single circuit can paralyze the entire system, resulting in significant losses. Therefore, ICs, especially those used in aerospace applications, require extensive reliability screening tests before use to expose any existing faults and defects as early as possible, thereby improving the reliability of the circuits.

[0004] Aging tests are a reliability screening method widely used in industrial production, especially in electronics manufacturing and aerospace industries, to reduce or eliminate early product failures. They are very important for improving product quality and reliability, reducing losses caused by early failures, and lowering warranty and maintenance costs.

[0005] Currently, aging tests for electronic components typically rely on manual methods using multimeters or oscilloscopes to determine device output functionality. This approach is inefficient, carries the risk of missed detections, and can only be performed at room temperature with the high-temperature oven door open, failing to provide real-time monitoring of component output status during high-temperature aging tests. The uncontrollable output status poses significant quality risks, directly impacting the effectiveness and accuracy of the aging test. To address the increasing number of aerospace missions and future aerospace development trends, aging tests for aerospace semiconductor devices require the design of a low-cost, high-efficiency, reusable, DC-level output-type visualized automatic detection system. This system would ensure continuous monitoring of device status throughout the entire aging test process, guaranteeing controlled device operation and obtaining the most accurate aging test data. Summary of the Invention

[0006] The technical problem to be solved by this invention is to overcome the shortcomings of the existing technology and achieve the requirements of low cost, high efficiency, visualization and automatic detection of component aging test.

[0007] The objective of this invention is achieved through the following technical solutions:

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

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

[0010] The mechanical wheel sorting device mainly consists of a circular PCB board, a stepper motor, a metal bracket with an insulating layer, metal spring probes, a connector interface, and an electromagnetic lifter. The circular PCB board has a ring-shaped pad group on its surface. The pads on the ring are detection contacts, arranged in a sequence corresponding to the output leads of each station on the PCB. The spacing between the pads is equal. The PCB board is connected to the connector interface via PCB traces. The stepper motor is installed at the center of the ring-shaped pad group, and its shaft is fixed to the metal bracket with an insulating layer. A metal spring probe is mounted at the end of the metal bracket, contacting the ring-shaped pad contacts on the circular PCB board. The top of the metal spring probe is connected to the input terminal of the AD acquisition module via a wire. When the electromagnetic lifter receives a "raise" or "lower" command from the host computer, it raises or lowers the metal bracket with an insulating layer to a fixed height. When the entire assembly is raised, the stepper motor rotates at a fixed angle according to the MCU's instructions, aligning perpendicularly with the detection point of the next station. When the entire assembly is lowered, the metal spring probe connects to the current station's detection point, preparing for voltage acquisition.

[0011] The AD acquisition module samples and holds the input voltage level, converting the analog voltage value into a digital value and storing it in the register of the ADC integrated circuit. After conversion by the 485 converter, the value is transmitted to the host computer via the bus. The control module is mainly an MCU, which controls the stepper motor by receiving instructions from the host computer. The host computer's role is to send "start detection" commands to the control module, receive the digital value converted by the AD acquisition module, process and analyze it, compare the result with the set threshold, issue prompts, control the alarm device to issue alarm commands, and display the output voltage level values ​​of each station of the refining board on the display while automatically recording the information into the online database for remote mobile access terminals.

[0012] In one embodiment of the present invention, the power supply module mainly consists of a transformer, a rectifier bridge, a filter, and a voltage converter. 220V AC power is converted to 36V AC power by the transformer, converted to 36V DC power by the rectifier bridge, filtered to remove harmonics and glitches, and finally supplied with the corresponding operating voltage for each module by the voltage converter.

[0013] In one embodiment of the present invention, the AD acquisition module mainly consists of an operational amplifier, an ADC integrated circuit, and a 485 converter circuit. The operational amplifier is used to form a voltage follower. Since the input impedance of the operational amplifier circuit is very high, there is almost no current input, so it will not affect the device under test during the detection process. The ADC integrated circuit is used 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.

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

[0015] In one embodiment of the present invention, the host computer sends a motor rotation command via USB serial port, which is output to the mechanical wheel selector via the MCU of the control module to control the stepper motor's operating state; the command is sent to control the electromagnetic lifter of the mechanical wheel selector to perform lifting operations; the data in the holding register of the AD acquisition module is read via the 485 bus, the data is calculated and converted into a measured voltage value by the program, and compared with a preset threshold. Once the preset threshold is exceeded, the alarm device is immediately activated to sound an alarm and an alarm prompt and abnormal status information are sent to the remote mobile access terminal. The system writes the measured voltage value result into a table in the visualization interface.

[0016] In one embodiment of the present invention, the host computer automatically inputs information into the online database, providing functions such as viewing the historical status of all device outputs, generating data reports, statistical charts, and data statistical analysis.

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

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

[0019] The host computer program begins initialization, the visual interface report is cleared, and all modules are placed in their initial states. The host computer sends a motor rotation command to the MCU via USB serial port, controlling the insulating metal bracket of the mechanical wheel selector to rotate to the center point of Pad1 on the PCB board. The host computer program controls the electromagnetic lift to descend, and the metal spring probe connects to Pad1. Simultaneously, the top wire of the metal spring probe connects to the input of the AD acquisition module, meaning the output of the aging device has been transmitted to the input of the AD acquisition module. The host computer program controls the signal conversion module to work, converting the output signal into an RS485 signal for transmission to the host computer. After processing and judging the data, the host computer outputs it to the report. The host computer program then controls the electromagnetic lift to rise. The metal spring probe is disconnected from Pad1. The host computer sends a motor rotation command to the MCU via USB serial port. The motor controls the insulating metal bracket of the mechanical wheel sorting device to rotate to the center point of Pad2 on the PCB board, and completes the inspection of Pad1 to Padn in sequence. During the aging monitoring process, when the data in the report deviates from the set threshold, the system will automatically activate the audible and visual alarm device and mark it in the data report to remind the user to handle it. After the last Pad is inspected, the host computer sends a return to origin command to control the insulating metal bracket of the mechanical wheel sorting device to rotate to the Pad1 position to perform the second round of inspection. The above content is repeated until the aging process is completed.

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

[0021] (1) Compared with the prior art, the present invention can replace the repetitive operation of manually using an oscilloscope to check the output waveform or a multimeter to measure the voltage, and does not require opening the high temperature chamber door, and can automatically detect the device output under the condition of high temperature aging of the device.

[0022] (2) Compared with the prior art, the present invention can automatically and cyclically detect 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 complete the output testing of batch aging devices at regular intervals according to the testing frequency set by the user.

[0024] (4) Compared with the prior art, the present invention uses a stepper 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, high reliability, high accuracy 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 friction on probe positioning deviation, making probe positioning accurate and highly stable;

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

[0027] (7) Compared with the prior art, the present invention can judge the inspection results according to the voltage threshold set by the user. If the detected voltage exceeds the set voltage threshold, the buzzer alarm will be triggered immediately. Compared with the traditional method of relying on the duty personnel to check the power current change of the whole board at regular intervals, the abnormal state of the device can be directly discovered and located.

[0028] (8) Compared with the prior art, the present invention has scalability and the number of detection channels is unlimited. According to the actual needs of users, the detection scale can be increased by expanding the detection channels, thereby adapting to the old refining plates with various workstations.

[0029] (9) Compared with the prior art, the present invention has an aging status database, which can perform operations such as viewing the historical status of all device output status, generating data reports, statistical charts, and data statistical analysis;

[0030] (10) Compared with the prior art, the present invention utilizes Internet technology to automatically record the output status information into an online database, and the information in the database can be accessed anytime and anywhere through the accompanying mobile terminal application. It can also receive abnormal alarm prompts immediately. Attached Figure Description

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

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

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

[0034] Figure 4 This is a schematic diagram of a mechanical wheel sorting 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 A schematic diagram of the old refining box. Detailed Implementation

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

[0039] A DC-level output type component aging visualization automatic detection system is comprehensively designed with high reliability, high precision, high efficiency, and wide applicability in mind. It mainly consists of a power supply module, protection module, mechanical selection device, AD acquisition module, control module, host computer, display and alarm device, and remote mobile access terminal. The design schematic is shown below. Figure 1 As shown.

[0040] The power supply module provides the necessary operating voltage to various modules / components, including the control module, AD acquisition module, and mechanical selection device. The protection module primarily monitors the operating voltage and current of each module / component within the system. When the operating voltage or current in any module / component exceeds the limit, the protection module automatically cuts off the power to the corresponding part to prevent system malfunctions caused by overvoltage or overcurrent. The mechanical selection device consists of a circular PCB board, a stepper motor, an insulating metal bracket, metal spring probes, a connector interface, and an electromagnetic lifter. The stepper motor receives step signals from the MCU in the control module and rotates at a fixed angle to sequentially select each detection channel, transmitting the output voltage levels from each station of the aging board to the subsequent modules. 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 voltage level, 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, the digital quantity is transmitted to the host computer via the bus. The control module is mainly a microcontroller (MCU), which controls the stepper motor by receiving instructions from the host computer. The host computer's role is to issue a "start detection" command to the control module, receive the digital quantity converted by the AD acquisition module, process and analyze it, compare the result with the set threshold, issue prompts, control the alarm device to sound an alarm, and display the output voltage level of each station of the refining board on the display while automatically recording the information into an online database for remote mobile access terminals.

[0041] More specifically:

[0042] (1) Power module

[0043] The power supply module mainly consists of components such as a transformer, rectifier bridge, filter, and voltage converter. 220V AC power is converted to 36V AC by the transformer, then to 36V DC by the rectifier bridge, and finally filtered to remove harmonics and interference. The voltage converter then provides the necessary operating voltage for components such as the microcontroller, AD acquisition module, and stepper motor. Figure 6 As 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 in the system. When an abnormal situation occurs in the system, causing the voltage, current, and temperature of some units or the entire system to exceed the set limit threshold, a threshold alarm is triggered, and the power supply of part or the entire system is shut down to prevent the system from burning out due to abnormal conditions.

[0046] (3) Mechanical wheel sorting device

[0047] The mechanical wheel sorting device mainly consists of a circular PCB board, a stepper motor, a metal bracket with an insulating layer, metal spring probes, a connector interface, and an electromagnetic lifter. Figure 4 As shown in the diagram, the circular PCB surface has a ring-shaped pad group. The pads on the ring are detection contacts, and their arrangement corresponds to the output leads of each station on the PCB. The spacing between the pads is equal. They are connected to the connector interface via PCB traces. A stepper motor is installed at the center of the ring-shaped pad group. The stepper motor shaft is fixed to an insulating metal bracket. A metal spring probe is mounted at the end of the insulating metal bracket. The metal spring probe is used to contact the ring-shaped pad contacts on the circular PCB. The top of the metal spring probe is connected to the input terminal of the AD acquisition module via a wire. The main function of the electromagnetic lift is to raise or lower the insulating metal bracket to a fixed height upon receiving a "raise" or "lower" command from the host computer. When the entire assembly is raised, the stepper motor can rotate at a fixed angle according to the MCU's instructions to align vertically with the detection point of the next station. When the entire assembly is lowered, the metal spring probe connects to the current station's detection point to prepare for voltage acquisition.

[0048] (4) AD acquisition module

[0049] The AD acquisition module mainly consists of components such as operational amplifiers, ADC integrated circuits, and 485 converter circuits, etc. Figure 5 As shown. The operational amplifier functions as a voltage follower. Because the op-amp circuit has a very high input impedance, there is almost no current input, so it will not affect the device under test during the detection process. The ADC integrated circuit samples the analog voltage and converts it into a digital quantity, storing it in an internal register. The RS485 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 mainly consists of an MCU, a motor driver chip, and a USB bus adapter. The MCU connects to the host computer via the USB bus adapter. After receiving a rotation command from the host computer, it outputs a control signal to the motor driver chip, which drives the stepper motor. Figure 2 and Figure 3 As shown.

[0052] (6) Host computer

[0053] The system sends motor rotation commands via USB serial port, which are then output by the MCU of the control module to the mechanical wheel selector to control the stepper motor's operation. Commands are also sent to control the electromagnetic lift of the mechanical wheel selector to perform lifting operations. Data from the holding register in the AD acquisition module is read via the 485 bus, calculated and converted into a measured voltage value, and compared with a preset threshold. If the threshold is exceeded, an alarm is immediately triggered, and an alarm notification and abnormal status information are sent to a remote mobile access terminal. The system writes the measured voltage value results into a table on the visual interface. Information is automatically entered into an online database, providing functions such as viewing historical output status of all devices, generating data reports, statistical charts, and data statistical analysis.

[0054] (7) Display and alarm device

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

[0056] (8) Remote mobile access terminal

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

[0058] The testing system was verified through actual testing using a device aging test, with the XX2805S DC-DC converter as an example.

[0059] Old refining box, like Figure 7As shown, the device outputs Pad1 to Padn are connected to the connector interface of the mechanical wheel sorting device via ribbon cables. After the detection device is started, the host computer program executes automatically, begins initialization, clears the reports on the visual interface, and places each unit module in its initial state. The host computer sends a motor rotation command to the MCU via USB serial port. The motor controls the insulating metal bracket of the mechanical wheel sorting device to rotate to the center point of Pad1 on the PCB board. The host computer program controls the electromagnetic lift to descend, and the metal spring probe connects to Pad1. Simultaneously, the top wire of the metal spring probe connects to the AD acquisition module. At the input end, 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, converting the output signal into an RS485 signal for transmission to the host computer. After processing the data, the host computer outputs it to the report. The host computer program controls the electromagnetic lift to rise, disconnecting the metal spring probe from Pad1. The host computer sends a motor rotation command to the MCU via USB serial port. The motor controls the insulating metal bracket of the mechanical wheel selector to rotate to the center point of Pad2 on the PCB board, and the inspection of Pad1 to Padn is completed in sequence. During the aging monitoring process, when the data in the report deviates from the set threshold, the system will automatically activate the audible and visual alarm device and mark it in the data report to remind the user to take further action. After the last Pad is inspected, the host computer sends a return-to-origin command, controlling the insulating metal bracket of the mechanical wheel selector to rotate to the Pad1 position for the second round of inspection. This process is repeated until the aging process is completed.

[0060] The contents not described in detail in this specification are common knowledge to those skilled in the art.

[0061] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make possible changes and modifications to the technical solutions of the present invention by utilizing the methods and techniques disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solutions of the present invention shall fall within the protection scope of the technical solutions of the present invention.

Claims

1. A direct current level output type component burn-in visual automatic detection system, characterized in that, The power module, the protection module, the mechanical wheel selection device, the AD acquisition module, the control module, the host computer, the display and alarm device, and the remote mobile access terminal are included. The power module provides the required working voltage for each module; the protection module monitors the working voltage and current of each module, and automatically cuts off the power supply of the corresponding part when the working voltage and current exceed the limit, thereby playing a protection role. The mechanical wheel selection device mainly comprises a circular PCB, a stepping motor, a metal bracket with an insulating layer, a metal spring probe, a connector interface, and an electromagnetic lifter. The circular PCB is provided with a ring-shaped pad group. The pads on the ring are detection contacts, and the arrangement order corresponds to the output lead-out ends of each station of the burn-in board. The intervals between the pads are equal. The stepping motor is installed at the center position of the ring-shaped pad group. The rotating shaft of the stepping motor is fixed with the metal bracket with an insulating layer. The metal bracket with an insulating layer is provided with the metal spring probe at the end. The metal spring probe is used to contact the ring-shaped pad contacts on the circular PCB. 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 "lift up" or "lower down" command from the host computer, the metal bracket with an insulating layer is lifted up or lowered down to a fixed height. When the metal bracket with an insulating layer is lifted up, the stepping motor can rotate by a fixed angle according to the instruction of the MCU, and is vertically aligned with the detection point of the next station. The AD acquisition module samples and holds 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, the digital quantity is transmitted to the host computer through the bus. The control module mainly comprises an MCU, which controls the stepping motor by receiving the instruction from the host computer. The host computer sends the "start detection" command to the control module, receives the digital quantity converted by the AD acquisition module, and processes and analyzes the digital quantity. The host computer compares the result with the set threshold value, sends a prompt, controls the alarm device to send an alarm command, and displays the output level voltage value of each station of the burn-in board on the display and automatically enters the information into the online database for access by the remote mobile access terminal.

2. The automatic detection system for visualizing burn-in of components according to claim 1, wherein The power module mainly comprises a transformer, a rectifier bridge, a filter, and a voltage converter. 220V AC power is converted into 36V AC power by the transformer, converted into 36V DC power by the rectifier bridge, filtered to remove harmonic and burr interference by the filter, and finally converted into the corresponding working voltage for each module by the voltage converter.

3. The automated system for visualizing burn-in of components according to claim 1, wherein, The AD acquisition module mainly comprises an operational amplifier, an ADC integrated circuit, and a 485 converter circuit. The operational amplifier functions as a voltage follower. Since the input impedance of the operational amplifier circuit is very high, almost no current is input, so the operational amplifier circuit does not affect the device under test during the detection process. The ADC integrated circuit converts the sampled analog voltage into a digital quantity and stores it in the internal register. The 485 converter circuit converts the digital quantity in the register from a TTL signal into an RS485 signal and transmits it to the host computer.

4. The automated system for visualizing burn-in of components according to claim 1, wherein, The control module is mainly composed of MCU, motor drive chip and USB bus adapter. The MCU is connected with the upper computer through the USB bus adapter, receives the rotating command from the upper computer, and outputs the control signal to the motor drive chip. The motor drive chip is used for driving the stepper motor.

5. The automated system for visualizing and detecting the burn-in of components according to claim 1, characterized in that, The upper computer sends the motor rotating command to the mechanical wheel selection device through the MCU of the control module, so as to control the running state of the stepper motor; and sends the command to control the electromagnetic lifter of the mechanical wheel selection device to perform the lifting operation. The data in the holding register of the AD acquisition module is read through the 485 bus, the data is calculated and converted into a measured voltage value through the program, and is compared with the preset threshold value. Once the preset threshold value is exceeded, the alarm device is controlled to alarm and send an alarm prompt and abnormal state information to the remote mobile access terminal. The system writes the measured voltage value result into the table in the visual interface.

6. The automated system for visualizing and detecting the burn-in of components according to claim 1, characterized in that, The upper computer automatically enters information into the online database, provides functions of viewing the history of all device output states, generating data reports, statistical charts and data statistical analysis.

7. The automated system for visualizing and detecting the burn-in of components according to claim 1, characterized in that, The remote mobile access terminal can access the device output state database through the Internet to view the alarm situation and abnormal state information.

8. A detection method based on the component burn-in visualization automatic detection system of claim 1, characterized in that, The process is as follows: The upper computer program starts initialization, the visual interface report is cleared, each module is placed in the initial state, the upper computer sends the motor rotating command to the MCU through the USB serial port, controls the metal support with an insulating layer of the mechanical wheel selection device to rotate to the center point of the position where the PCB board Pad1 is located, the upper computer program controls the electromagnetic lifter to descend, the metal spring probe is connected with Pad1, and at the same time, the metal spring probe top lead wire is connected with the input end of the AD acquisition module, that is, the device output has been transmitted to the input end of the AD acquisition module. The upper computer program controls the signal conversion module to work, converts the output signal into the RS485 signal and transmits it into the upper computer. After the data is judged and processed by the upper computer, it is output to the report. The upper computer program controls the electromagnetic lifter to rise, the metal spring probe is disconnected with Pad1, the upper computer sends the motor rotating command to the MCU through the USB serial port, the motor controls the metal support with an insulating layer of the mechanical wheel selection device to rotate to the center point of the position where the PCB board Pad2 is located, and the inspection of Pad1~Padn is completed in sequence. During the aging monitoring process, when the data in the report deviates from the set threshold value, the system automatically starts the sound and light alarm device, makes a mark in the data report, and reminds the user to handle it subsequently. After the detection of the last Pad is completed, the upper computer sends the return to origin command, controls the metal support with an insulating layer of the mechanical wheel selection device to rotate to the Pad1 point, and performs the second round of inspection operation. Thereafter, the above content is repeated until the aging process is completed.

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