PCBA automatic test system

Abstract

The utility model provides a PCBA automatic test system, which comprises a board loading machine, a test machine and a board unloading machine which are sequentially connected through a transmission mechanism, the test machine comprises a test rack, a test assembly, an electrical assembly, a computer assembly and a power supply assembly, the transmission mechanism is arranged in the middle of the test rack in a penetrating manner, and the test assembly is arranged on the test rack. The test assembly is arranged below the transmission mechanism and is provided with a probe, and the probe is used for being inserted into a test point of the PCBA so as to input a first test signal or output a second test signal; the electrical assembly is connected with the test assembly and is used for driving a probe of the test assembly to be inserted into a test point of the PCBA or pulled out of the test point according to a control instruction of the computer assembly; the computer assembly is used for generating the first test signal and receiving the second test signal to complete on-line test and function test of the PCBA. The power supply assembly supplies power to the test assembly, the electrical assembly and the computer assembly. According to the PCBA automatic test system, the test efficiency is improved, the turnover loss is reduced, and the cost of the test system is also saved.

Description

Technical Field

[0001] This utility model relates to the field of PCBA testing equipment technology, and more specifically, to an automatic PCBA testing system. Background Technology

[0002] From the automotive and telecommunications industries to various information-related sectors, production testing is a necessary and costly process. Testing departments often favor flexibly configurable, compact, and fully functional test equipment because it not only covers current tasks but also addresses the challenges of technological advancements, reducing unnecessary and substantial investments for companies. Automotive electronic circuit boards require both ICT (In-Circuit Test) and FCT (Functional Circuit Testing) tests to achieve 100% test coverage and improve product reliability.

[0003] With continuous technological advancements, traditional FCT (Fixed-Cut Test) methods may fail to keep pace with new design and manufacturing requirements, especially when higher levels of test coverage and accuracy are needed. To overcome these limitations, they are often combined with other testing methods, such as ICT (In-Process Testing), to ensure comprehensive verification of board quality and performance. This integrated testing strategy provides higher test coverage and quality control.

[0004] The main drawback of existing technologies is that ICT and FCT are tested separately, with significant differences in testing methods, objectives, and application scenarios, each with its own limitations.

[0005] For example, a limitation of ICT (Inductively Coupled Testing) is that when testing capacitors, such as when a small capacitor is connected in parallel with a large capacitor, the small capacitor cannot be measured. When two capacitors C1 and C2 are connected in parallel, the capacitance is C1 + C2. Generally, if the capacitance of C2 is more than 10 times that of C1, then C1 cannot be measured. Typically, ICT tests allow an error range of ±20% between the actual and standard values ​​for capacitors. When C1 = 1F and C2 = 10F, the total capacitive reactance C = C1 + C2 = 11F. During measurement, the lower limit is 8.8F and the upper limit is 13.2F, meaning that a capacitive reactance between 8.8F and 13.2F is acceptable for the test. If C1 is missing during testing, C = 10F. Within the allowable error range, the test will still pass, and the problem of missing C1 will not be detected. In other words, in ICT testing, a small capacitor connected in parallel with a large capacitor cannot be measured.

[0006] The limitations of FCT are that it primarily focuses on functional issues and does not cover the detection of manufacturing defects. FCT testing has incomplete coverage and cannot detect certain manufacturing defects, such as soldering problems.

[0007] In addition, separate testing of ICT and FCT requires testing on two separate sets of equipment. The PCBA under test is transferred between the two sets of equipment, which requires more testing time, higher storage costs, and increases the risk of PCBA damage. Utility Model Content

[0008] The purpose of this invention is to provide an automated PCBA testing system that integrates ICT and FCT, improves PCBA testing efficiency, and saves testing costs.

[0009] To achieve the above objectives, this utility model provides the following technical solution:

[0010] This utility model provides an automatic PCBA testing system for performing online and functional testing of PCBAs. It includes an upper board machine, a testing machine, and a lower board machine connected sequentially via a transmission mechanism. The transmission mechanism is used to transfer the PCBA under test between the upper board machine, the testing machine, and the lower board machine. The testing machine includes a testing frame and testing components, electrical components, computer components, and power supply components, all mounted on the testing frame. The transmission mechanism passes through the middle of the testing frame and includes a transmission belt for supporting and transferring the PCBA under test. The testing components are located below the transmission mechanism and have connections with the transmission belt. The test components include: a probe matching the test points of the PCBA under test, which is used to insert into the test points of the PCBA to input a first test signal or output a second test signal generated by the PCBA based on the first test signal; an electrical component connected to the test component below the test component and electrically connected to the computer component, which is used to drive the probes of the test component to insert into or remove from the test points of the PCBA according to the control instructions of the computer component; the computer component is used to generate the first test signal and receive the second test signal to complete the online testing and functional testing of the PCBA; and a power supply component supplies power to the test component, the electrical component, and the computer component.

[0011] Furthermore, the PCBA automatic testing system also includes a press assembly connected to the electrical components. The press assembly is located above the transmission mechanism and directly above the testing components. The press assembly can be controlled to descend and press the PCBA onto the transmission mechanism.

[0012] In one embodiment, the press assembly includes a mounting plate with multiple mounting holes for detachably mounting pressure bars for flattening the PCBA; the corner of the press assembly is provided with a positioning pin for inserting into a pre-set positioning hole on the test assembly.

[0013] In one embodiment, the testing component further includes a color sensor and a brightness sensor, which are fixed to the transmission mechanism and electrically connected to the computer component to detect the color difference and brightness of the LEDs on the PCBA under test.

[0014] In one embodiment, the transmission mechanism includes a docking section and a test section, each equipped with a pair of guide rails. The docking section is located between the upper and lower board machines and the test machine, and the test section is located inside the test machine. The transmission belt is located between the pair of guide rails. The electrical components also include a spacing adjustment mechanism and a height adjustment mechanism. The spacing adjustment mechanism includes an automatic spacing adjustment mechanism and a manual spacing adjustment mechanism. The manual spacing adjustment mechanism is connected to the guide rails of the docking section to adjust the spacing between the guide rails of the docking section. The automatic spacing adjustment mechanism is connected to the test section to adjust the spacing between the guide rails of the test section. The height adjustment mechanism is located below the guide rails of the test section, connected to the guide rails of the test section, and electrically connected to the computer component.

[0015] In one embodiment, the automatic spacing adjustment mechanism includes a motor fixed to one of the guide rails, a first screw connecting the pair of guide rails and the output shaft of the motor, and a first nut sleeved on the first screw and fixed to the other guide rail; the manual spacing adjustment mechanism includes a second screw connecting the pair of guide rails, a second nut sleeved on the second screw and fixed to the guide rail, and a handle connected to one end of the second screw and located on one side of the mating section.

[0016] In one embodiment, the computer component, the test rack, and the power supply component are arranged along the extension direction of the transmission mechanism, and the computer component and the power supply component are fixed on opposite sides of the test rack.

[0017] In one embodiment, both the upper and lower board loading machines include a docking structure, a support platform, a lifting mechanism, and an electric push rod. The docking structure and the support platform are located on opposite sides of the lifting mechanism. The docking structure is used to dock the upper or lower board loading machine with the testing machine. The support platform is used to support and transport the storage frame for loading PCBAs. The lifting mechanism is used to lift the storage frame to dock with the docking structure or the support platform. The electric push rod is used to push the PCBAs in the storage frame toward the testing machine or push the PCBAs transmitted from the testing machine into the storage frame.

[0018] In one embodiment, the support platform includes an upper support platform and a lower support platform arranged in parallel. The upper support platform, the lower support platform, and the lifting mechanism are all equipped with a sprocket transmission mechanism for driving the storage plate frame to move horizontally, and the transmission directions of the sprocket transmission mechanisms of the upper support platform and the lower support platform are opposite.

[0019] In one embodiment, the electric push rod of the upper platen machine is located at the bottom of the upper support platform, and the electric push rod of the lower platen machine is located on the docking structure.

[0020] The beneficial effects of the technical solution provided by this utility model are as follows: The PCBA automatic testing system of this utility model passes through the upper board machine, the testing machine and the lower board machine through the transmission mechanism. The electrical components control the lifting and lowering of the testing components to plug and unplug the test points of the PCBA under test on the transmission mechanism. The computer components generate test signals and send them to the PCBA under test through the testing components. The system also receives the test results detected by the testing components to complete the online testing and functional testing of the PCBA. The entire process from upper board to lower board is completed automatically on one system. There is no need to transfer the PCBA between two systems, which improves testing efficiency, reduces turnover loss and saves the cost of the testing system. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments of this utility model will be briefly introduced below.

[0022] Figure 1 This is a schematic diagram of the structure of an automatic PCBA testing system provided in one embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the structure of a testing machine provided in one embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the upper plate machine provided in one embodiment of the present utility model;

[0025] Figure 4 This is a schematic diagram of the unloading machine provided in one embodiment of the present utility model. Detailed Implementation

[0026] Embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While some embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the accompanying drawings and embodiments of the present invention are for illustrative purposes only and are not intended to limit the scope of protection of the present invention.

[0027] It should be understood that the steps described in the method embodiments of this utility model may be performed in different orders and / or in parallel. Furthermore, the method embodiments may include additional steps and / or omit the steps shown. The scope of this utility model is not limited in this respect.

[0028] The term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to". The term "connection" can refer to a direct connection or an indirect connection via intermediate components (elements). The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". Definitions of other terms will be given in the following description.

[0029] It should be noted that the concepts of "first" and "second" mentioned in this utility model are only used to distinguish between devices, modules or units, and are not used to limit these devices, modules or units to necessarily be different devices, modules or units, nor are they used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0030] See Figures 1 to 4 This utility model relates to an automatic PCBA testing system, which is used to complete online testing and functional testing of PCBA 500, solve various problems caused by the testing of PCBA 500 between the ICT system and the FCT system, improve testing efficiency, reduce turnover loss, and save the cost of the testing system.

[0031] The PCBA automatic testing system includes an upper board machine 200, a testing machine 100, and an lower board machine 300 connected in sequence via a transmission mechanism 170. The transmission mechanism 170 is used to transmit the PCBA 500 under test between the upper board machine 200, the testing machine 100, and the lower board machine 300.

[0032] The test machine 100 includes a test frame 110 and test components, electrical components 140, computer components 160, and power supply components 150, all mounted on the test frame 110. The test frame 110 provides a mounting structure for and supports the other components. The test components are used to connect to the PCBA 500 under test (DUT) to perform online and functional testing on the DUT board. The electrical components 140 controllably drive the plug-in / plug-out connection between the test components and the DUT. The computer components 160 generate test signals to provide to the test components and receive the test results to complete the two types of tests on the PCBA 500. The power supply components 150 provide power to the test components, electrical components 140, and computer components 160.

[0033] The test rack 110 is constructed from multiple columns and beams, providing a stable physical structure to ensure the stable installation and operation of other components. The transmission mechanism 170 is installed in the middle of the test rack 110. The transmission mechanism 170 includes guide rails and a transmission belt, which supports and transmits the PCBA 500 under test.

[0034] The test assembly is located below the transmission mechanism 170 and has probes that match the test points of the PCBA 500 under test on the transmission mechanism 170. The probes are used to insert into the test points of the PCBA 500 to input a first test signal to the PCBA 500 or output a second test signal generated by the PCBA 500 based on the first test signal. It should be noted that the test assembly includes a test fixture 121 and probes. The test fixture 121 is a contour-following fixture, customized to fit the specific shape and test point positions of the PCBA 500 under test. The probes are mounted on the test fixture 121 and can be precisely aligned with preset test points on the circuit board. As the test fixture 121 rises and nests the PCBA 500 under test, the probes are inserted into the test points.

[0035] The electrical component 140 is connected to the test fixture 121 below and electrically connected to the computer component 160, and is used to drive the probes of the test component to be inserted into or pulled out of the test points of the PCBA 500 according to the control instructions of the computer component 160.

[0036] Optionally, the electrical components 140 include sensors, cylinders, relays, switches, power supplies, air lines, and terminals, which are responsible for transmitting and processing electrical signals and performing mechanical actions.

[0037] The computer component 160 is used to generate the first test signal and receive the second test signal to complete the online testing and functional testing of the PCBA 500. The first test signal generated by the computer component 160 is introduced into the circuit of the PCBA 500 through probes to detect the electrical connections and electrical performance between components, thereby completing the voltage and current detection of the PCBA 500 to ensure that the basic electrical parameters of the circuit meet the design requirements. The test signal is used to complete the communication detection (such as infrared, RS485, RS232, etc. communication modules) and functional detection (such as pulse, relay, etc.) of the PCBA 500 to ensure that various communication functions are normal. It should be understood that the first test signal generated by the computer component 160 is different for different communication or functional detections.

[0038] In one embodiment, the computer component 160 includes a computer, a motion control card, a signal adapter board, and signal cables, etc. It is the core control part of the test system, responsible for running the test software, processing test data, controlling the operation of other components, displaying test results, and uploading data to facilitate subsequent data analysis and archiving.

[0039] Furthermore, the testing machine 100 also includes a press assembly 130 connected to the electrical component 140. The press assembly 130 is located above the transmission mechanism 170 and directly above the testing component. The press assembly 130 can descend under the drive of the electrical component 140 to press the PCBA 500 onto the transmission mechanism 170.

[0040] In one embodiment, the press assembly 130 includes a mounting plate with multiple mounting holes for detachably mounting pressure bars for flattening the PCBA 500. By providing numerous mounting holes, the pressure bars can be inserted as needed, pressing the PCBA 500 firmly against the test fixture 121. This ensures the stability of the circuit board during testing, allowing the probes to fully engage with the test points of the PCBA 500, avoiding poor contact, ensuring accurate transmission of test signals, and improving the accuracy of test results.

[0041] In addition, the corner of the press assembly 130 is provided with a downwardly extending positioning pin. The positioning pin is used to insert into a preset positioning hole on the test assembly to avoid displacement between the press assembly 130 and the test assembly, which would cause the probe and the test point to not be accurately connected.

[0042] In one embodiment, the testing component further includes an optical detection sensor 122, specifically including a color sensor and a brightness sensor. The color sensor and the brightness sensor are fixed on the transmission mechanism 170 and are electrically connected to the computer component 160, and are used to detect the color difference and brightness of the LEDs on the PCBA 500 under test.

[0043] The brightness of the LED is measured directly using a brightness sensor. The brightness sensor accurately senses light intensity and converts it into an electrical signal. During the FCT function test, the computer component 160 acquires and processes the electrical signal to obtain the actual brightness value of the LED, and then compares it with the set brightness standard to determine whether the LED's brightness meets the standard.

[0044] The color sensor is used to detect the color of the LED. It can identify light of different wavelengths and effectively distinguish subtle color differences, thereby determining the color characteristics of the light emitted by the LED. The computer component 160 can detect the color difference of the LED by comparing the acquired electrical signal with the electrical signal corresponding to the standard color value.

[0045] In one embodiment, the transmission mechanism 170 includes a docking section and a test section, each equipped with a pair of guide rails. The docking section is located between the upper board 200 and the lower board 300 and the test machine 100, and the test section is located within the test machine 100. The electrical component 140 further includes a spacing adjustment mechanism and a height adjustment mechanism. The spacing adjustment mechanism includes an automatic spacing adjustment mechanism and a manual spacing adjustment mechanism. The manual spacing adjustment mechanism is connected to the guide rails of the docking section to adjust the spacing between the guide rails of the docking section. The automatic spacing adjustment mechanism is connected to the test section to adjust the spacing between the guide rails of the test section. The height adjustment mechanism is located below the guide rails of the test section, connected to the guide rails of the test section, and electrically connected to the computer component 160.

[0046] In one embodiment, the automatic spacing adjustment mechanism includes a motor fixed to one of the guide rails, a screw bridging the pair of guide rails and connected to the motor, and a nut sleeved on the screw and fixed to the guide rail; the manual spacing adjustment mechanism includes a screw, a nut sleeved on the screw and fixed to the guide rail, and a handle connected to one end of the screw and located on one side of the mating section.

[0047] Therefore, by adjusting the width of the test section and the docking section through the spacing adjustment mechanism, adjusting the spacing of the conveyor belt, and adjusting the height of the guide rail through the height adjustment device, the spacing between the conveyor belt and the test component can be adjusted to adapt to the testing of PCBA 500 boards of different specifications.

[0048] In one embodiment, the computer component 160, the test rack 110, and the power supply component 150 are arranged along the extension direction of the transmission mechanism 170, and the computer component 160 and the power supply component 150 are fixed on opposite sides of the test rack 110 and located below the docking section. By placing the computer component 160 and the power supply component 150 on both sides of the test rack 110, the weight distribution can be more balanced, improving the stability of the system; in addition, placing the computer component 160 and the power supply component 150 below the docking section can make full use of the system's installation space and reduce the floor area.

[0049] Additionally, a barcode scanner is fixed on the side of the test rack facing the upper board, and the barcode scanner is electrically connected to the computer component for scanning identification codes (e.g., barcodes) on the PCBA.

[0050] In summary, in the testing machine 100, the testing components precisely connect the probes to the pre-reserved test points on the PCBA 500 board via mechanical actions or automated equipment. The test fixture 121 communicates and transmits signals through its connection to the test points. This method allows the testing system to simulate various input signals and transmit these signals to the PCBA 500, while simultaneously receiving and analyzing the output signals returned from the PCBA 500, thereby comprehensively verifying the functionality and performance of the PCBA 500. During the testing process, the testing machine 100 detects the basic electrical parameters of the PCBA 500, such as voltage, current, and resistance, and simulates the product's input signals to verify the product's functionality and performance.

[0051] See Figure 3 In the upper plate machine 200, the gantry frame 210 is provided with a lifting mechanism 220. The two sides of the lifting mechanism 220 are respectively connected to the bearing platform 230 and the docking structure 240. The bearing platform 230 is specifically provided with a lower bearing platform 231 and an upper bearing platform 232. An electric push rod (not shown) is provided under the upper bearing platform 232. An electric control box 250 is also provided on one side of the gantry frame 210. The electric control box 250 is used to control the working status of the lifting mechanism, the upper bearing platform, the lower bearing platform and the electric push rod.

[0052] See Figure 4 In the unloading machine 300, the gantry frame 310 is provided with a lifting mechanism 320. The two sides of the lifting mechanism 320 are respectively connected to a bearing platform 330 and a docking mechanism 340, wherein the electric push rod 341 is provided on the docking mechanism 340.

[0053] In the board loading machine or board unloading machine, the docking structure and the support platform are respectively located on both sides of the lifting mechanism. The docking structure is used to realize the docking of the board loading machine 200 or the board unloading machine 300 with the testing machine 100. The support platform is used to support and transfer the storage frame used to load PCBA 500. The lifting mechanism is used to lift the storage frame so that it docks with the docking structure or the support platform. The electric push rod is used to push the PCBA 500 in the storage frame towards the testing machine 100 or push the tested PCBA 500 from the testing machine 100 into the storage frame.

[0054] In one embodiment, the upper platform, the lower platform, and the lifting mechanism are all provided with a sprocket transmission mechanism for driving the storage plate frame to move horizontally, and the transmission directions of the sprocket transmission mechanisms of the upper platform and the lower platform are opposite.

[0055] In this embodiment, the transmission direction of the lower support platform is either the board entry direction or the board exit direction, and the transmission direction of the upper support platform is either the board entry direction or the board exit direction. This reduces the load-bearing capacity required by the upper support platform and improves the stability of the system. It is understood that during board entry, the storage frame is filled with the PCBA 500 board to be tested, and during board exit, the storage frame is filled with the PCBA 500 board that has been tested by the testing machine 100.

[0056] As previously mentioned, the electric push rod of the upper board machine 200 is located at the bottom of the upper support platform, and the electric push rod of the lower board machine 300 is located on the docking structure. The electric push rod on the upper support platform pushes the PCBA 500 in the storage frame towards the docking structure. Then, under the action of the docking section of the docking structure and the testing machine 100, it is transferred to the testing section for online and functional testing. After testing, the PCBA 500 is transferred out of the testing machine 100, input to the docking structure of the lower board machine 300 via the docking section, and pushed into the storage frame by the electric push rod of the docking structure, completing the board collection action.

[0057] Compared with existing technologies, this utility model has the following advantages.

[0058] This system combines ICT (In-Circuit Testing) and FCT (Functional Testing) capabilities to ensure the quality and performance of automotive electronic circuit control boards on the production line. Through automated testing, the system comprehensively covers the electrical characteristics and functional requirements of the circuit boards, significantly improving testing efficiency and accuracy.

[0059] The following are the advantages of this system: ease of upgrading and preparedness for potential needs:

[0060] 1. Modular architecture design:

[0061] (1) The system adopts a modular architecture design, which means that it can be flexibly configured and adjusted according to the real-time testing needs of the production line.

[0062] (2) It has a variety of ICT / FCT boards that can support different test tasks and meet diverse test needs.

[0063] 2. Multiple mixed testing methods:

[0064] (1) It supports mixed testing methods of ICT, boundary scanner and FCT board, and can flexibly adjust the configuration according to the characteristics of the product and the testing requirements.

[0065] (2) This hybrid testing method can provide more comprehensive and accurate test results, ensuring product quality.

[0066] 3. Development based on matrix relay modules and instruments:

[0067] (1) The test system is developed based on advanced matrix relay modules and instruments, which ensures the accuracy and reliability of the test.

[0068] (2) The matrix relay module can achieve efficient and accurate signal switching and transmission, thereby improving testing efficiency.

[0069] 4. Equipped with a worktable and interchangeable automated fixtures:

[0070] (1) The system is equipped with a workbench and interchangeable automated fixtures, which facilitates operation and maintenance by operators.

[0071] (2) The interchangeable automated fixtures can adapt to circuit boards of different sizes and types, improving the versatility and flexibility of the system.

[0072] 5. Easy to upgrade:

[0073] (1) The system design takes into account future upgrade needs, and new test boards, functional modules or software updates can be easily added.

[0074] (2) This easy-to-upgrade feature enables the system to keep up with the pace of technological development and meet the ever-changing testing needs.

[0075] 6. High scalability:

[0076] (1) One module supports up to 990 test points, and two modules support up to 2430 test points, which fully meets the needs of large-volume and high-density testing.

[0077] (2) As the production line expands and testing needs increase, the system can be easily expanded to ensure the continuity and stability of testing.

[0078] The above description is merely a preferred embodiment of this utility model and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of this utility model is not limited to the specific combination of the above-described technical features, but also includes other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features of this utility model that have similar functions.

[0079] Although the subject matter has been described using language specific to structural features and / or methodological logic, it should be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or actions described above. Rather, the specific features and actions described above are merely illustrative examples of implementing the claims.

Claims

1. A PCBA automatic test system for completing online test and function test of PCBA, characterized in that, The test machine comprises a test frame, a test assembly, an electrical assembly, a computer assembly and a power supply assembly, wherein the test assembly, the electrical assembly and the computer assembly are all installed on the test frame; The test frame is provided with the transmission mechanism in the middle, and the transmission mechanism comprises a transmission belt for supporting and transmitting the PCBA to be tested; The test assembly is arranged below the transmission mechanism and is provided with probes matched with the test points of the PCBA on the transmission belt, the probes being used for plugging into the test points of the PCBA to input the first test signal or output the second test signal generated by the PCBA based on the first test signal; The electrical assembly is connected with the test assembly below the test assembly and is electrically connected with the computer assembly, and is used for driving the probes of the test assembly to plug into or pull out of the test points of the PCBA according to the control instruction of the computer assembly; The computer assembly is used for generating the first test signal and receiving the second test signal to complete the online test and the function test of the PCBA; The power supply assembly supplies power to the test assembly, the electrical assembly and the computer assembly. The test machine further comprises a press assembly connected with the electrical assembly, the press assembly being arranged above the transmission mechanism and directly above the test assembly, and the press assembly being controllable to press the PCBA on the transmission mechanism.

2. The PCBA automatic test system of claim 1, wherein, The press assembly comprises a mounting plate provided with a plurality of mounting holes for detachably arranging press rods for flattening the PCBA; 3. The PCBA automatic test system of claim 2, wherein, The corner end of the press assembly is provided with a positioning needle for plugging into a pre-set positioning hole of the test assembly. The test assembly further comprises a color sensor and a brightness sensor, the color sensor and the brightness sensor being fixed on the transmission mechanism and being electrically connected with the computer assembly, and being used for detecting the color difference and the brightness of the LED lamp on the PCBA to be tested.

4. The PCBA automatic test system of claim 1, wherein, The transmission mechanism comprises a docking section and a test section each provided with a pair of guide rails, the docking section being arranged between the upper plate machine and the lower plate machine and the test machine, the test section being arranged in the test machine, and the transmission belt being arranged between the pair of guide rails; 5. The PCBA automatic test system of claim 1, wherein, The electrical assembly further comprises a spacing adjustment mechanism and a height adjustment mechanism, the spacing adjustment mechanism comprising an automatic spacing adjustment mechanism and a manual spacing adjustment mechanism; The manual spacing adjustment mechanism is connected with the guide rails of the docking section for adjusting the spacing of the guide rails of the docking section, and the automatic spacing adjustment mechanism is connected with the test section for adjusting the spacing of the guide rails of the test section; The height adjustment mechanism is connected with the guide rails of the test section below the guide rails of the test section and is electrically connected with the computer assembly. The automatic spacing adjustment mechanism comprises a motor fixed on one of the guide rails, a first screw rod connected with an output shaft of the motor and crossing between the pair of guide rails, and a first nut member sleeved on the first screw rod and fixed with the other guide rail; 6. The PCBA automatic test system of claim 5, wherein, The manual spacing adjustment mechanism comprises a second screw rod crossing between the pair of guide rails, a second nut member sleeved on the second screw rod and fixed with the guide rail, and a handle connected with one end of the second screw rod and arranged on one side of the docking section. ​ 7. The PCBA automatic test system of claim 1, wherein, The computer components, test racks and power supply components are arranged along the direction of the transmission mechanism, and the computer components and power supply components are fixed on opposite sides of the test racks.

8. The PCBA automatic test system of claim 1, wherein, The upper plate machine and the lower plate machine each include a docking structure, a bearing table, a lifting mechanism and an electric push rod. The docking structure and the bearing table are separately arranged on both sides of the lifting mechanism, the docking structure is used to dock the upper plate machine or the lower plate machine with the test machine, the bearing table is used to support and transmit the storage plate frame for loading PCBA, the lifting mechanism is used to lift the storage plate frame to dock with the docking structure or the bearing table, and the electric push rod is used to push the PCBA in the storage plate frame to the test machine or push the PCBA from the test machine into the storage plate frame.

9. The PCBA automatic test system of claim 8, wherein, The bearing table includes an upper bearing table and a lower bearing table arranged in parallel, the upper bearing table, the lower bearing table and the lifting mechanism are each provided with a chain wheel transmission mechanism for driving the horizontal movement of the storage plate frame, and the transmission directions of the chain wheel transmission mechanisms of the upper bearing table and the lower bearing table are opposite.

10. The PCBA automatic test system of claim 9, wherein, The electric push rod of the upper plate machine is arranged at the bottom of the upper bearing table, and the electric push rod of the lower plate machine is arranged on the docking structure.

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