Testing device and method for remotely detecting printed circuit board

Abstract

The invention relates to the technical field of testing devices, in particular to a testing device and method for remotely detecting a printed circuit board, and the device comprises a testing table and two movable shells, the top surface of the testing table is symmetrically provided with the two movable shells, and a plurality of grooved wheels are uniformly distributed in the two movable shells. The center of the side wall of the grooved wheel is fixedly connected with a vertical shaft movably connected with the movable shell, the vertical shaft is provided with a conveying driving assembly, the bottom face of the movable shell is provided with a distance adjusting assembly, and the top face of the testing table is fixedly connected with a mounting plate. According to the printed circuit board clamping and conveying device, by arranging the distance adjusting assembly and driving a first threaded rod through a double-head motor, the distance between the movable shells on the two sides can be adjusted, and therefore the printed circuit board clamping and conveying device can clamp and convey printed circuit boards of different specifications; therefore, the testing device can test printed circuit boards of different specifications, and the testing universality is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of testing devices, and in particular to a testing device and method for remotely detecting a printed circuit board. Background Art

[0002] In modern electronic equipment manufacturing, printed circuit boards (PCBs) serve as carriers of electronic components and key electrical connections. Their quality directly impacts the performance and reliability of electronic devices. With the rapid advancement of electronic technology, the specifications and complexity of PCBs continue to increase, making efficient and accurate testing of PCBs a crucial step in ensuring product quality.

[0003] Currently, most common PCB test devices on the market are designed for specific circuit board specifications. Testing PCBs of varying sizes and layouts often requires replacing specialized test fixtures or equipment, which is cumbersome and costly, significantly limiting the versatility and efficiency of the test devices. Furthermore, existing test devices can typically only detect obvious physical defects such as short circuits and open circuits on the PCB surface, making it difficult to conduct in-depth analysis of the PCB's electrical performance and accurately pinpoint potential electrical faults. This results in a lack of effective support for subsequent repairs and improvements, impacting production efficiency and product quality.

[0004] Therefore, there is an urgent need to develop a remote testing device and method that can be flexibly adjusted according to the size of the printed circuit board to achieve universal testing of circuit boards of different specifications, and at the same time has the function of in-depth detection of electrical performance, so as to improve test efficiency and accuracy and meet the needs of the modern electronic manufacturing industry for efficient and comprehensive detection of printed circuit boards. Summary of the Invention

[0005] In view of the deficiencies in the prior art, the present invention provides a testing device and method for remotely detecting a printed circuit board, which has the advantages of good test versatility and high test accuracy.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] A test device for remotely detecting printed circuit boards, comprising a test bench, wherein two movable shells are symmetrically arranged on the top surface of the test bench, a plurality of groove wheels are evenly distributed in the two movable shells, the side wall centers of the groove wheels are fixedly connected to a vertical shaft movably connected to the movable shell, a conveying drive assembly is provided on the vertical shaft, a spacing adjustment assembly is provided on the bottom surface of the movable shell, a mounting plate is fixedly connected to the top surface of the test bench, two first electric push rods are symmetrically fixedly connected to the mounting plate, a movable plate is fixedly connected to the first electric push rod, the movable plate is movably connected to the mounting plate and a visual module is fixedly connected to the bottom surface, the movable plate is arranged in an inverted T shape and is movably connected to connecting plates on both sides, and an adjustable test assembly is provided on the connecting plate.

[0008] As a preferred technical solution of the present invention, the conveying drive assembly includes a first gear, which is fixedly connected to the vertical shaft, and the same second gear is engaged between two adjacent first gears. The side wall centers of the second gears are fixedly connected to a circular shaft, and the circular shaft is movably connected to the movable shell. The bottom end of one of the circular shafts passes through the movable shell and is fixedly connected to the first motor, and the first motor is fixedly connected to the movable shell.

[0009] As a preferred technical solution of the present invention, the spacing adjustment component includes a through slot, and two through slots are symmetrically opened on the test bench, and vertical plates are movably connected in the through slots. One side of the vertical plate is fixedly connected to the movable shell and the other side is threadedly connected to a first threaded rod, a double-headed motor is fixedly connected between the two first threaded rods, and the other end of the first threaded rod is movably connected to a side plate fixedly connected to the test bench.

[0010] As a preferred technical solution of the present invention, the adjustable test assembly includes a second electric push rod, the two ends of the second electric push rod are respectively fixedly connected to the movable plate and the connecting plate, a circular shell is movably connected to the connecting plate, a third electric push rod is fixedly connected to the inner cavity of the circular shell and an angle adjustment assembly is provided on the outer wall, a horizontal plate is installed at the bottom end of the third electric push rod, and a test head and a lateral displacement assembly are fixedly connected to the bottom surface of the horizontal plate.

[0011] As a preferred technical solution of the present invention, the angle adjustment assembly includes a second motor, which is fixedly connected to the connecting plate and has a rotating shaft fixedly connected to the rotor, a third gear fixedly connected to the top of the rotating shaft, and a ring gear meshing with the third gear fixedly connected to the outer wall of the circular shell.

[0012] As a preferred technical solution of the present invention, the lateral displacement assembly includes a top groove, which is opened on the top surface of the horizontal plate and has a movable block movably connected inside. The movable block is fixedly connected to the third electric push rod and has a second threaded rod threaded on the side wall. The second threaded rod is movably connected to the horizontal plate and has a third motor fixedly connected to one end. The third motor is fixedly connected to the horizontal plate.

[0013] As a preferred technical solution of the present invention, a movable groove is provided on the inner side wall of the through groove, a slider is fixedly connected to the side wall of the vertical plate, and the slider is movably connected to the movable groove.

[0014] A testing method for a test device for remotely detecting a printed circuit board comprises the following steps:

[0015] S1: The spacing between the movable shells is adjusted according to the size of the printed circuit board to be inspected. The double-headed motor is started, and the double-headed motor drives the first threaded rod to rotate. The first threaded rod engages the vertical plate to move in the through slot, and the vertical plate drives the movable shell to move. When the spacing between the groove wheels inside the two movable shells on both sides matches the size of the printed circuit board to be inspected, the driving of the double-headed motor is stopped and the printed circuit board to be inspected is placed in the position between the groove wheels on both sides;

[0016] S2: Start the first motor, the first motor drives the circular shaft to rotate, the circular shaft drives the second gear to rotate, and the meshing transmission between the second gear and the first gear can make the vertical shaft drive the groove wheel to rotate. The rotation of the groove wheel can realize the conveyance of the printed circuit board to be tested to the upper position of the test bench, realizing the automatic conveying operation of the printed circuit board;

[0017] S3: When the printed circuit board to be inspected is conveyed to the lower side of the mounting plate, the first motor stops running and the first electric push rod is started. The first electric push rod drives the movable plate to move, and the movable plate drives the vision module to move. The vision module is used to photograph the circuit structure on the printed circuit board and transmit the photographed data to the external analysis device. The reciprocating motion of the first electric push rod and the first motor can complete the inspection operation of the printed circuit board.

[0018] S4: If a problem is detected by the visual module during the printed circuit board inspection process, the first electric push rod is driven according to the problem position calculated by the external analysis device, and the first electric push rods on both sides drive the movable plate to the problem position of the printed circuit board, and then the second electric push rod is started, and the second electric push rod pushes the connecting plate to the specified position, and then the second motor is started, and the second motor drives the rotating shaft to rotate, and the rotating shaft drives the third gear to rotate, and the third gear engages with the ring gear to rotate, and the ring gear drives the circular shell to rotate, and the circular shell drives the third electric push rod inside it to rotate, thereby changing the angle of the cross plate to the specified position;

[0019] S5: Starting the third motor, which drives the second threaded rod to rotate, and the second threaded rod engages the movable block to move. The movable block moves in the top groove on the top surface of the horizontal plate, changing the horizontal position of the horizontal plate and the test head thereon. Then starting the third electric push rod, which pushes the horizontal plate toward the side of the printed circuit board, connects the test head with the circuit on the printed circuit board, and completes the connection operation for testing the printed circuit board.

[0020] S6: Connect the test head to an external test device. Through the operation of the external test device, the problem location of the printed circuit board can be tested for resistance, circuit connection status or other performance, which is convenient for determining the problem of the printed circuit board and facilitating subsequent maintenance of the printed circuit board.

[0021] S7: After the test of the printed circuit board is completed, the first motor is started again. Under the drive of the first motor, the groove wheel can transport the printed circuit board out from the other side of the test bench to facilitate another test operation.

[0022] The embodiments of the present invention provide a test device and method for remotely detecting a printed circuit board, which have the following beneficial effects:

[0023] 1. The present invention provides a spacing adjustment component. By driving the first threaded rod with a double-headed motor, the spacing between the movable shells on both sides can be adjusted. This allows the device to clamp and convey printed circuit boards of different specifications. This allows the test device to test printed circuit boards of different specifications, thereby improving the versatility of the test.

[0024] 2. The present invention is provided with an adjustable test assembly. The position of the movable plate can be adjusted by the first electric push rod, and the spacing between the test heads can be adjusted by the second electric push rod. The angular position and lateral position of the test head can be adjusted by the operation of the angle adjustment assembly and the lateral displacement assembly. The test head can be moved to a specified position on the printed circuit board by the operation of the third electric push rod, thereby facilitating the electrical characteristic test operation of the printed circuit board and improving the accuracy of the printed circuit board test. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0026] Figure 1 It is a schematic diagram of the front three-dimensional structure of the present invention;

[0027] Figure 2 It is a schematic diagram of the side three-dimensional structure of the present invention;

[0028] Figure 3 It is a schematic diagram of the transverse cross-sectional three-dimensional structure of the present invention;

[0029] Figure 4 It is a schematic diagram of the three-dimensional structure of the spacing adjustment component of the present invention;

[0030] Figure 5 It is a schematic diagram of the three-dimensional structure of the interior of the movable shell of the present invention;

[0031] Figure 6 It is a schematic diagram of the three-dimensional structure on the movable plate of the present invention;

[0032] Figure 7 It is a schematic diagram of the three-dimensional structure of the adjustable test assembly of the present invention.

[0033] In the figure: 1. test bench; 2. movable shell; 3. groove pulley; 4. vertical shaft; 5. conveying drive assembly; 6. spacing adjustment assembly; 7. mounting plate; 8. first electric push rod; 9. movable plate; 10. vision module; 11. connecting plate; 12. adjustable test assembly; 13. first gear; 14. second gear; 15. circular shaft; 16. first motor; 17. vertical plate; 18. first threaded rod; 19. double-headed motor; 20. side plate; 21. second electric push rod; 22. slider; 23. circular shell; 24. third electric push rod; 25. angle adjustment assembly; 26. horizontal plate; 27. test head; 28. lateral displacement assembly; 29. second motor; 30. rotating shaft; 31. third gear; 32. ring gear; 33. movable block; 34. second threaded rod; 35. third motor. DETAILED DESCRIPTION

[0034] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0035] Example 1: Figure 1-7 As shown, a test device for remotely detecting a printed circuit board includes a test bench 1. Two movable shells 2 are symmetrically arranged on the top surface of the test bench 1. A number of grooved wheels 3 are evenly distributed in the two movable shells 2. The center of the side wall of the grooved wheel 3 is fixedly connected to a vertical shaft 4 movably connected to the movable shell 2. A conveying drive assembly 5 is provided on the vertical shaft 4. The conveying drive assembly 5 includes a first gear 13, which is fixedly connected to the vertical shaft 4. The same second gear 14 is meshed between two adjacent first gears 13. The center of the side wall of the second gear 14 is fixedly connected to a circular shaft 15. The circular shaft 15 is movably connected to the movable shell 2. The bottom end of one of the circular shafts 15 passes through the movable shell 2 and is fixedly connected to a first motor 16. The first motor 16 is fixedly connected to the movable shell 2.

[0036] In the technical solution of the embodiment, the first motor 16 is started, the first motor 16 drives the circular shaft 15 to rotate, and the circular shaft 15 drives the second gear 14 to rotate. Through the meshing transmission between the second gear 14 and the first gear 13, the vertical shaft 4 can drive the groove wheel 3 to rotate. The rotation of the groove wheel 3 can realize the conveyance of the printed circuit board to be tested to the upper side position of the test bench 1, realizing the automated conveying operation of the printed circuit board;

[0037] A spacing adjustment component 6 is provided on the bottom surface of the movable shell 2. The spacing adjustment component 6 includes a through slot. Two through slots are symmetrically provided on the test bench 1. A vertical plate 17 is movably connected in each through slot. One side of the vertical plate 17 is fixedly connected to the movable shell 2 and the other side is threadedly connected to a first threaded rod 18. A double-headed motor 19 is fixedly connected between the two first threaded rods 18. The other end of the first threaded rod 18 is movably connected to a side plate 20 fixedly connected to the test bench 1.

[0038] In the technical solution of the embodiment, the double-headed motor 19 is started, and the double-headed motor 19 drives the first threaded rod 18 to rotate. The first threaded rod 18 engages the vertical plate 17 to move in the through groove, and the vertical plate 17 drives the movable shell 2 to move. When the spacing between the groove wheels 3 inside the movable shells 2 on both sides matches the specifications of the printed circuit board to be tested, the driving of the double-headed motor 19 is stopped, so that the test device can realize the test operation of printed circuit boards of different specifications, thereby improving the versatility of the test;

[0039] Furthermore, a movable groove is provided on the inner side wall of the through groove, and a slider 22 is fixedly connected to the side wall of the vertical plate 17. The slider 22 is movably connected to the movable groove, which can make the vertical plate 17 move stably in the through groove, thereby improving the adjustment accuracy;

[0040] A mounting plate 7 is fixedly connected to the top surface of the test bench 1, and two first electric push rods 8 are symmetrically fixedly connected to the mounting plate 7. A movable plate 9 is fixedly connected to the first electric push rods 8. The movable plate 9 is movably connected to the mounting plate 7 and a visual module 10 is fixedly connected to the bottom surface;

[0041] In the technical solution of the embodiment, the first electric push rod 8 is started, the first electric push rod 8 drives the movable plate 9 to move, and the movable plate 9 drives the visual module 10 to move. The circuit structure on the printed circuit board is photographed by the visual module 10, and the photographed data is transmitted to the external analysis device. Through the reciprocating motion of the first electric push rod 8 and the first motor 16, the inspection operation of the printed circuit board can be completed, thereby improving the efficiency of the test;

[0042] Embodiment 2: On the basis of embodiment 1, the movable plate 9 is arranged in an inverted T shape and is movably connected to the connecting plate 11 on both sides. The connecting plate 11 is provided with an adjustable test assembly 12, and the adjustable test assembly 12 includes a second electric push rod 21. The two ends of the second electric push rod 21 are respectively fixedly connected to the movable plate 9 and the connecting plate 11. A circular shell 23 is movably connected to the connecting plate 11. The inner cavity of the circular shell 23 is fixedly connected to the third electric push rod 24 and the outer wall is provided with an angle adjustment assembly 25. The bottom end of the third electric push rod 24 is installed with a horizontal plate 26, and the bottom surface of the horizontal plate 26 is fixedly connected to a test head 27 and a lateral displacement assembly 28;

[0043] In the technical solution of the embodiment, the first electric push rod 8 is driven according to the problem position calculated by the external analysis device. The first electric push rods 8 on both sides drive the movable plate 9 to move to the problem position of the printed circuit board. Then the second electric push rod 21 is started. The second electric push rod 21 pushes the connecting plate 11 to the specified position to adjust the spacing position of the test head 27.

[0044] The angle adjustment assembly 25 includes a second motor 29, which is fixedly connected to the connecting plate 11 and has a rotating shaft 30 fixedly connected to its rotor. A third gear 31 is fixedly connected to the top of the rotating shaft 30, and a ring gear 32 meshing with the third gear 31 is fixedly connected to the outer wall of the circular shell 23.

[0045] In the technical solution of the embodiment, the second motor 29 is started, the second motor 29 drives the rotating shaft 30 to rotate, the rotating shaft 30 drives the third gear 31 to rotate, the third gear 31 engages the ring gear 32 to rotate, the ring gear 32 drives the circular shell 23 to rotate, and the circular shell 23 drives the third electric push rod 24 inside it to rotate, thereby changing the angular position of the horizontal plate 26 and the test head 27 thereon;

[0046] The lateral displacement assembly 28 includes a top groove, which is opened on the top surface of the horizontal plate 26 and has a movable block 33 movably connected therein. The movable block 33 is fixedly connected to the third electric push rod 24 and a second threaded rod 34 is threadedly connected to the side wall. The second threaded rod 34 is movably connected to the horizontal plate 26 and one end of the second threaded rod 34 is fixedly connected to the third motor 35. The third motor 35 is fixedly connected to the horizontal plate 26.

[0047] In the technical solution of the embodiment, the third motor 35 is started, and the third motor 35 drives the second threaded rod 34 to rotate, and the second threaded rod 34 engages the movable block 33 to move, and the movable block 33 moves in the top groove on the top surface of the horizontal plate 26, changing the horizontal position of the horizontal plate 26 and the test head 27 thereon, and then the third electric push rod 24 is started, and the third electric push rod 24 pushes the horizontal plate 26 to move toward the side of the printed circuit board, so that the test head 27 is connected to the circuit on the printed circuit board, completing the connection operation during the inspection of the printed circuit board, and connecting the test head 27 to the external test equipment. Through the operation of the external test equipment, the problem position of the printed circuit board can be inspected, including resistance, circuit connection status or other performance. This facilitates the determination of the problem of the printed circuit board and facilitates the subsequent maintenance and use of the printed circuit board.

[0048] A testing method for a test device for remotely detecting a printed circuit board comprises the following steps:

[0049] S1: The spacing between the movable shells 2 is adjusted according to the size of the printed circuit board to be inspected. The double-headed motor 19 is started, and the double-headed motor 19 drives the first threaded rod 18 to rotate. The first threaded rod 18 engages the vertical plate 17 to move in the through groove, and the vertical plate 17 drives the movable shell 2 to move. When the spacing between the groove wheels 3 inside the movable shells 2 on both sides matches the size of the printed circuit board to be inspected, the driving of the double-headed motor 19 is stopped and the printed circuit board to be inspected is placed in the position between the groove wheels 3 on both sides;

[0050] S2: Start the first motor 16, the first motor 16 drives the circular shaft 15 to rotate, and the circular shaft 15 drives the second gear 14 to rotate. Through the meshing transmission between the second gear 14 and the first gear 13, the vertical shaft 4 can drive the groove wheel 3 to rotate. The rotation of the groove wheel 3 can realize the conveyance of the printed circuit board to be tested to the upper side of the test bench 1, realizing the automatic conveying operation of the printed circuit board;

[0051] S3: When the printed circuit board to be inspected is conveyed to the lower side of the mounting plate 7, the first motor 16 stops running and the first electric push rod 8 is started. The first electric push rod 8 drives the movable plate 9 to move, and the movable plate 9 drives the visual module 10 to move. The visual module 10 is used to photograph the circuit structure on the printed circuit board and transmit the photographed data to the external analysis device. The reciprocating motion of the first electric push rod 8 and the first motor 16 can complete the inspection operation of the printed circuit board;

[0052] S4: If a problem is detected by the visual module 10 during the inspection of the printed circuit board, the first electric push rod 8 is driven according to the problem position calculated by the external analysis device, and the first electric push rods 8 on both sides drive the movable plate 9 to move to the problem position of the printed circuit board, and then the second electric push rod 21 is started, and the second electric push rod 21 pushes the connecting plate 11 to the specified position, and then the second motor 29 is started, and the second motor 29 drives the rotating shaft 30 to rotate, and the rotating shaft 30 drives the third gear 31 to rotate, and the third gear 31 engages the ring gear 32 to rotate, and the ring gear 32 drives the circular shell 23 to rotate, and the circular shell 23 drives the third electric push rod 24 inside it to rotate, thereby changing the angle of the horizontal plate 26 to the specified position;

[0053] S5: Start the third motor 35, which drives the second threaded rod 34 to rotate. The second threaded rod 34 engages the movable block 33 to move. The movable block 33 moves in the top groove on the top surface of the horizontal plate 26, changing the horizontal position of the horizontal plate 26 and the test head 27 thereon. Then start the third electric push rod 24, which pushes the horizontal plate 26 toward the printed circuit board, so that the test head 27 is connected to the circuit on the printed circuit board, completing the connection operation for the printed circuit board test.

[0054] S6: Connect the test head 27 to an external test device. The operation of the external test device can realize the detection of the problem location of the printed circuit board, including resistance, circuit connection status or other performance, so as to facilitate the determination of the problem of the printed circuit board and facilitate the subsequent maintenance of the printed circuit board.

[0055] S7: After the test of the printed circuit board is completed, the first motor 16 is started again. Under the drive of the first motor 16, the groove wheel 3 can transport the printed circuit board out from the other side of the test bench 1 to facilitate the test operation again.

[0056] Finally, it should be noted that in the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limiting the present invention.

[0057] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0058] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A test device for remotely detecting a printed circuit board, comprising a test bench (1), characterized in that: Two movable shells (2) are symmetrically arranged on the top surface of the test bench (1), and a plurality of groove wheels (3) are evenly distributed in the two movable shells (2). The center of the side wall of the groove wheel (3) is fixedly connected to a vertical shaft (4) movably connected to the movable shell (2), and a conveying drive component (5) is arranged on the vertical shaft (4). A spacing adjustment component (6) is arranged on the bottom surface of the movable shell (2). A mounting plate (7) is fixedly connected to the top surface of the test bench (1), and two first electric push rods (8) are symmetrically fixedly connected to the mounting plate (7). A movable plate (9) is fixedly connected to the first electric push rod (8), and the movable plate (9) is movably connected to the mounting plate (7) and a visual module (10) is fixedly connected to the bottom surface. The movable plate (9) is arranged in an inverted T shape and is movably connected to connecting plates (11) on both sides. An adjustable test component (12) is arranged on the connecting plate (11).

2. A test device for remotely detecting a printed circuit board according to claim 1, characterized in that: The conveying drive assembly (5) includes a first gear (13), the first gear (13) is fixedly connected to the vertical shaft (4), and a second gear (14) is meshed between two adjacent first gears (13). The center of the side wall of the second gear (14) is fixedly connected to a circular shaft (15), and the circular shaft (15) is movably connected to the movable shell (2). The bottom end of one of the circular shafts (15) passes through the movable shell (2) and is fixedly connected to a first motor (16), and the first motor (16) is fixedly connected to the movable shell (2).

3. A test device for remotely detecting a printed circuit board according to claim 2, characterized in that: The spacing adjustment component (6) includes a through slot, and two through slots are symmetrically provided on the test bench (1), and vertical plates (17) are movably connected in each of the through slots. One side of the vertical plate (17) is fixedly connected to the movable shell (2) and the other side is threadedly connected to a first threaded rod (18), a double-headed motor (19) is fixedly connected between the two first threaded rods (18), and the other end of the first threaded rod (18) is movably connected to a side plate (20) fixedly connected to the test bench (1).

4. A test device for remotely detecting a printed circuit board according to claim 3, characterized in that: The adjustable test assembly (12) includes a second electric push rod (21), the two ends of which are fixedly connected to the movable plate (9) and the connecting plate (11), respectively; a circular shell (23) is movably connected to the connecting plate (11); a third electric push rod (24) is fixedly connected to the inner cavity of the circular shell (23), and an angle adjustment assembly (25) is provided on the outer wall; a transverse plate (26) is installed at the bottom end of the third electric push rod (24), and a test head (27) and a lateral displacement assembly (28) are fixedly connected to the bottom surface of the transverse plate (26).

5. A test device for remotely detecting a printed circuit board according to claim 4, characterized in that: The angle adjustment assembly (25) includes a second motor (29), the second motor (29) is fixedly connected to the connecting plate (11), and a rotating shaft (30) is fixedly connected to the rotor, a third gear (31) is fixedly connected to the top end of the rotating shaft (30), and a ring gear (32) meshing with the third gear (31) is fixedly connected to the outer wall of the circular shell (23).

6. A test device for remotely detecting a printed circuit board according to claim 5, characterized in that: The lateral displacement assembly (28) includes a top groove, which is opened on the top surface of the transverse plate (26) and has a movable block (33) movably connected therein. The movable block (33) is fixedly connected to the third electric push rod (24) and has a second threaded rod (34) threadedly connected on the side wall. The second threaded rod (34) is movably connected to the transverse plate (26) and has a third motor (35) fixedly connected at one end. The third motor (35) is fixedly connected to the transverse plate (26).

7. A test device for remotely detecting a printed circuit board according to claim 6, characterized in that: A movable groove is provided on the inner side wall of the through groove, a slider (22) is fixedly connected to the side wall of the vertical plate (17), and the slider (22) is movably connected to the movable groove.

8. A testing method for a testing device for remotely detecting a printed circuit board according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1: The spacing between the movable shells (2) is adjusted according to the size of the printed circuit board to be inspected, and the double-headed motor (19) is started. The double-headed motor (19) drives the first threaded rod (18) to rotate. The first threaded rod (18) engages the vertical plate (17) and moves in the through groove. The vertical plate (17) drives the movable shell (2) to move. When the spacing between the groove wheels (3) inside the movable shells (2) on both sides matches the size of the printed circuit board to be inspected, the driving of the double-headed motor (19) is stopped and the printed circuit board to be inspected is placed at the position between the groove wheels (3) on both sides. S2: Start the first motor (16), the first motor (16) drives the circular shaft (15) to rotate, the circular shaft (15) drives the second gear (14) to rotate, and the meshing transmission between the second gear (14) and the first gear (13) can make the vertical shaft (4) drive the groove wheel (3) to rotate, and the rotation of the groove wheel (3) can realize the conveyance of the printed circuit board to be tested to the upper side position of the test bench (1), thereby realizing the automatic conveying operation of the printed circuit board; S3: When the printed circuit board to be inspected is transported to the lower side of the mounting plate (7), the first motor (16) stops running and the first electric push rod (8) is started. The first electric push rod (8) drives the movable plate (9) to move, and the movable plate (9) drives the visual module (10) to move. The circuit structure on the printed circuit board is photographed by the visual module (10), and the photographed data is transmitted to the inside of the external analysis device. Through the reciprocating motion of the first electric push rod (8) and the first motor (16), the inspection operation of the printed circuit board can be completed; S4: If a problem is detected by the visual module (10) during the printed circuit board inspection process, the first electric push rod (8) is driven according to the problem position calculated by the external analysis device, and the first electric push rods (8) on both sides drive the movable plate (9) to move to the problem position of the printed circuit board, and then the second electric push rod (21) is started, and the second electric push rod (21) pushes the connecting plate (11) to move to the specified position, and then the second motor (29) is started, and the second motor (29) drives the rotating shaft (30) to rotate, and the rotating shaft (30) drives the third gear (31) to rotate, and the third gear (31) engages with the ring gear (32) to rotate, and the ring gear (32) drives the circular shell (23) to rotate, and the circular shell (23) drives the third electric push rod (24) inside it to rotate, thereby changing the angle of the horizontal plate (26) to the specified position; S5: starting the third motor (35), the third motor (35) drives the second threaded rod (34) to rotate, the second threaded rod (34) engages the movable block (33) to move, the movable block (33) moves in the top groove on the top surface of the horizontal plate (26), changing the horizontal position of the horizontal plate (26) and the test head (27) thereon, and then starting the third electric push rod (24), the third electric push rod (24) pushes the horizontal plate (26) to move toward the side of the printed circuit board, so that the test head (27) is connected to the circuit on the printed circuit board, completing the connection operation when testing the printed circuit board; S6: Connecting the test head (27) to an external test device, the operation of the external test device can realize the detection operation of the problem position of the printed circuit board, including resistance, circuit connection status or other performance, so as to facilitate the determination of the problem of the printed circuit board and facilitate the subsequent maintenance and use of the printed circuit board; S7: After the printed circuit board test is completed, the first motor (16) is started again. Under the drive of the first motor (16), the groove wheel (3) can transport the printed circuit board out from the other side of the test bench (1) to facilitate the test operation again.

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