A high-efficiency detection device and method for detecting flatness of a high-frequency printed circuit board

Abstract

This invention discloses a highly efficient detection device and method for the flatness of high-frequency printed circuit boards. The invention relates to the technical field of detecting the flatness of high-frequency printed circuit boards. It includes a worktable and a mounting assembly for placing two high-frequency printed circuit boards to be tested, both mounted on the worktable. Detection components B and A are respectively located on the left and right sides of the mounting assembly on the worktable surface. A support plate is fixed to the left end of a movable plate, located directly below a horizontal plate. The support plate extends to the left directly below a bent plate, and a vertically arranged optical rod slides through the extended end. A mounting plate and a displacement sensor are sequentially fixed to the bottom end of the optical rod. The advantages of this invention are: significantly reducing the workload of workers and greatly improving the efficiency of high-frequency printed circuit board flatness detection.

Description

Technical Field

[0001] This invention relates to the technical field of detecting the flatness of high-frequency printed circuit boards, and in particular to a detection device and method for efficiently detecting the flatness of high-frequency printed circuit boards. Background Technology

[0002] High-frequency printed circuit boards (PCBs) are characterized by their fast signal transmission and are typically installed in electrical cabinets to control the normal operation of electrical components within the cabinet. A workshop produces PCBs that are generally rectangular in shape, with a thickness of 0.5~1.0 cm. After a batch of PCBs is produced, the process requires flatness testing, specifically checking the flatness of the top surface of the PCBs (due to the manufacturing process, the top surface of the PCBs may have wrinkles). After testing, workers discard defective PCBs that do not meet the flatness requirements, while placing the qualified PCBs into a separate finished product basket, because only PCBs with satisfactory flatness can be supplied to the customer.

[0003] The method used by workers in the workshop to inspect the flatness of high-frequency printed circuit boards is as follows:

[0004] Sa, the worker takes out a high-frequency printed circuit board 1 to be tested, and supports the high-frequency printed circuit board 1 on the table surface of the testing table 2, as follows. Figure 1 As shown;

[0005] Sb, the worker supports the test rod 4 of the jump meter 3 on the top surface of the left end of the high-frequency printed circuit board 1, such as Figure 2 As shown, at this time, keep the jump meter 3 stationary, and then the worker records the scale indicated by the pointer on the jump meter 3;

[0006] Sc, the worker moves horizontally to the right, as shown in Table 3, in the direction of movement. Figure 3 As shown by the middle arrow, during the movement, the worker observes the change of the pointer of the jump meter 3 in real time. If the pointer of the jump meter 3 does not change after it moves to the right end of the high frequency printed circuit board 1, it means that the flatness of the high frequency printed circuit board 1 being tested meets the requirements. The worker then judges the high frequency printed circuit board 1 being tested as a qualified product and takes it away.

[0007] If the pointer of the jump meter 3 changes during the movement of the jump meter 3, it indicates that the flatness of the high-frequency printed circuit board 1 being tested does not meet the requirements. The worker then determines that the high-frequency printed circuit board 1 being tested is a defective product. The worker removes the defective product, thus finally completing the flatness test of a high-frequency printed circuit board 1.

[0008] By repeating steps Sa~Sc multiple times, workers can complete the flatness inspection of all high-frequency printed circuit boards 1 in the workshop.

[0009] However, although the method used in the workshop can detect the flatness of the high-frequency printed circuit board 1, it still has the following technical defects:

[0010] I. In step Sb, the worker needs to support the detection rod 4 of the jump meter 3 on the top surface of the left end of the high-frequency printed circuit board 1. In step Sc, the worker needs to move the jump meter 3 horizontally and observe the change of the pointer of the jump meter 3 in real time in order to determine whether the flatness of the high-frequency printed circuit board 1 being tested meets the requirements. The entire testing process is done manually by the worker, which not only increases the worker's workload, but also increases the testing time of a single high-frequency printed circuit board 1. As a result, it takes a long time to complete the flatness testing of all high-frequency printed circuit boards 1 in the workshop, thereby reducing the testing efficiency of the flatness of the high-frequency printed circuit board 1.

[0011] II. In steps Sa to Sd, a worker can only inspect the flatness of one high-frequency printed circuit board 1 at a time, while the daily requirement is to inspect as many as 210 to 212 high-frequency printed circuit boards 1. This undoubtedly results in a long time required to complete the flatness inspection of all high-frequency printed circuit boards 1 in the workshop, thereby further reducing the efficiency of flatness inspection of high-frequency printed circuit boards 1.

[0012] Therefore, there is an urgent need for a testing device and method that can greatly reduce the workload of workers and greatly improve the efficiency of flatness testing of high-frequency printed circuit boards. Summary of the Invention

[0013] The purpose of this invention is to overcome the shortcomings of the prior art and provide a highly efficient detection device and method for detecting the flatness of high-frequency printed circuit boards, which greatly reduces the workload of workers and greatly improves the efficiency of detecting the flatness of high-frequency printed circuit boards.

[0014] The objective of this invention is achieved through the following technical solution: a high-efficiency detection device for detecting the flatness of high-frequency printed circuit boards, comprising a worktable, a placement assembly disposed on the worktable for placing two high-frequency printed circuit boards to be detected, and detection assembly B and detection assembly A respectively located on the left and right sides of the placement assembly on the worktable surface.

[0015] The detection component A includes a horizontal cylinder fixed to the workbench and a concave part with an upward opening fixed to the piston rod of the horizontal cylinder. A horizontal plate extending to the left is fixed on the left end face of the left side plate of the concave part, and a bending plate is provided on the extended end of the horizontal plate. The inclined part of the bending plate is connected to the horizontal plate.

[0016] A guide rod that slides through the right side plate of the concave part and extends to the left side plate of the concave part is slidably passed through it. A movable plate is fixed on the extended end of the guide rod. A drive motor is fixed on the right side plate of the concave part. A gear is installed on the output shaft of the drive motor. A rack meshes with the gear. The rack passes through the right side plate and the left side plate of the concave part sequentially to the left, and its extended end is fixed on the right end face of the movable plate.

[0017] A support plate is fixedly mounted on the left end face of the movable plate, located directly below the horizontal plate. The support plate extends to the left directly below the bent plate, and a vertically arranged light rod slides through the extended end. A mounting plate and a displacement sensor are sequentially fixed at the bottom end of the light rod. A spring is sleeved on the light rod, and the upper and lower ends of the spring are fixed to the support plate and the mounting plate, respectively. A nylon roller is rotatably mounted on the top end of the light rod. Under the elastic force of the spring, the nylon roller abuts against the horizontal part of the bent plate.

[0018] Multiple support frames are fixed on the bottom surface of the workbench, and each support frame is supported on the ground.

[0019] The mounting assembly includes a column fixed to the workbench surface and two connecting plates fixed to the top surface of the column. Each of the two connecting plates has a mounting seat fixed to its outer end face, and each of the two mounting seats has a mounting groove penetrating its outer end face on its top surface. The two mounting seats are arranged symmetrically about the column.

[0020] The detection component A also includes a base fixed to the workbench surface, the cylinder body of the horizontal cylinder is fixed to the right end face of the base, the piston rod of the horizontal cylinder extends to the left through the base, and the bottom wall of the concave part is welded to the extension end of the piston rod of the horizontal cylinder.

[0021] A through groove is provided in the left side plate of the concave component, and the guide rod and the rack are both arranged through the through groove.

[0022] The detection component A and the detection component B are arranged symmetrically about the placement component.

[0023] The detection device also includes a controller, which is electrically connected to the horizontal cylinder, drive motor and displacement sensor via signal lines.

[0024] A method for efficiently detecting the flatness of high-frequency printed circuit boards includes the following steps:

[0025] S1. The worker takes out two high-frequency printed circuit boards to be tested, puts one high-frequency printed circuit board to be tested into the placement slot of the placement seat of the testing component A, and puts the other high-frequency printed circuit board to be tested into the placement slot of the placement seat of the testing component B.

[0026] S2. The piston rods of the horizontal cylinders of detection component A and detection component B extend inwards. The piston rods drive the concave part to move inwards. The concave part drives the drive motor, gear, rack, guide rod, moving plate, cross plate and support plate to move inwards synchronously. The support plate drives the displacement sensor to move inwards synchronously. When the piston rods of the horizontal cylinders of detection component A and detection component B are fully extended, the displacement sensor of detection component A moves to just above the left end of the right side of the mounting base. At the same time, the displacement sensor of detection component B moves to just above the right end of the left side of the mounting base.

[0027] S3. Control the drive motor of detection component A to rotate forward. The drive motor of detection component A drives the gear to rotate clockwise. The gear drives the rack to move to the right in a straight line. The rack drives the moving plate to move to the right in a straight line. The moving plate drives the guide rod and the support plate to move to the right in a straight line. The support plate drives the light rod to move to the right in a straight line. The light rod drives the spring, nylon roller and displacement sensor on it to move to the right in a straight line.

[0028] As the nylon roller of detection component A moves from the horizontal part of the bending plate to the inclined part of the bending plate, the nylon roller drives the light rod to move gradually downward. The light rod drives the displacement sensor to move gradually toward the top surface of the high-frequency printed circuit board on the right. At the same time, the displacement sensor also gradually stretches the spring downward.

[0029] When the nylon roller of the detection component A moves from the inclined part of the bending plate to the horizontal plate, the displacement sensor just presses against the top surface of the left end of the high-frequency printed circuit board on the right. When the displacement sensor moves upward, it sends a displacement signal to the controller. As the nylon roller moves in a straight line to the right along the horizontal plate, the displacement sensor also moves in a straight line to the right along the top surface of the high-frequency printed circuit board.

[0030] If the displacement sensor sends displacement signals of different values ​​to the controller in real time during the movement, it indicates that the flatness of the high-frequency printed circuit board does not meet the requirements, and thus the high-frequency printed circuit board on the right is determined to be a defective product.

[0031] If the displacement sensor does not send a displacement signal of different values ​​to the controller when it moves to the right end of the high-frequency printed circuit board, it indicates that the flatness of the high-frequency printed circuit board meets the requirements, and thus the high-frequency printed circuit board on the right side is determined to be a qualified product.

[0032] S4. Control the drive motor of the detection component B to reverse, the drive motor drives the gear to rotate counterclockwise, the gear drives the rack to move to the left in a straight line, so that the displacement sensor of the detection component B first presses against the top surface of the right end of the high frequency printed circuit board on the left side, and then the displacement sensor moves to the left in a straight line while still attached to the top surface of the high frequency printed circuit board.

[0033] If, during the movement, the displacement sensor continuously sends displacement signals of different values ​​to the controller in real time, it indicates that the flatness of the high-frequency printed circuit board does not meet the requirements, and thus the high-frequency printed circuit board on the left is determined to be a defective product.

[0034] If the displacement sensor does not send a displacement signal of different values ​​to the controller when it moves to the left end of the high-frequency printed circuit board, it indicates that the flatness of the high-frequency printed circuit board meets the requirements. Therefore, the high-frequency printed circuit board on the left is determined to be a qualified product, thus finally realizing the flatness detection of the two high-frequency printed circuit boards.

[0035] S5. Workers can repeat steps S1 to S4 multiple times to complete the flatness inspection of all high-frequency printed circuit boards in the workshop.

[0036] The present invention has the following advantages: it greatly reduces the workload of workers and greatly improves the efficiency of flatness inspection of high-frequency printed circuit boards. Attached Figure Description

[0037] Figure 1 This is a schematic diagram showing how a high-frequency printed circuit board is supported on the test bench.

[0038] Figure 2 A schematic diagram showing the test rod of the oscilloscope supported on the top surface of the left end of a high-frequency printed circuit board;

[0039] Figure 3 A diagram illustrating a worker moving a jump meter horizontally to the right;

[0040] Figure 4 This is a schematic diagram of the structure of the present invention;

[0041] Figure 5 for Figure 4 Main section diagram;

[0042] Figure 6 A structural diagram showing the components being housed;

[0043] Figure 7 for Figure 6 Main section diagram;

[0044] Figure 8 This is a schematic diagram of the structure of component A;

[0045] Figure 9 for Figure 8 A schematic diagram of the concave component in the diagram;

[0046] Figure 10 for Figure 9 Main section diagram;

[0047] Figure 11 This is a schematic diagram showing the connection between the horizontal plate and the bent plate;

[0048] Figure 12 for Figure 11 Main section diagram;

[0049] Figure 13 A schematic diagram showing the connection of the moving plate, guide rod, rack, support plate, and displacement sensor;

[0050] Figure 14 This is a schematic diagram of placing a high-frequency printed circuit board into the mounting slot of detection component A;

[0051] Figure 15 A schematic diagram showing the displacement sensor of component A moving to the position directly above the left end of the right-side mounting base;

[0052] Figure 16 A schematic diagram showing the movement of the nylon roller of component A from the horizontal part to the inclined part of the bending plate;

[0053] Figure 17 This is a schematic diagram showing the displacement sensor pressing against the top surface of the left end of the high-frequency printed circuit board on the right side.

[0054] Figure 18 A schematic diagram showing the displacement sensor of component A moving in a straight line to the right against the top surface of a high-frequency printed circuit board;

[0055] In the picture:

[0056] 1-High frequency printed circuit board, 2-Testing table, 3-Runout meter, 4-Testing rod;

[0057] 5-Workbench, 6-Placement component, 7-Detection component B, 8-Detection component A, 9-Horizontal cylinder, 10-Concave part; 11-Horizontal plate, 12-Bending plate, 13-Guide rod, 14-Moving plate, 15-Drive motor, 16-Gear, 17-Rack;

[0058] 18-Support plate, 19-Shine rod, 20-Displacement sensor, 21-Spring, 22-Nylon roller;

[0059] 23-Column, 24-Connecting plate, 25-Seat, 26-Seat groove; 27-Base, 28-Through groove. Detailed Implementation

[0060] The present invention will be further described below with reference to the accompanying drawings. The scope of protection of the present invention is not limited to the following description:

[0061] like Figures 4-13 As shown, a high-efficiency testing device for detecting the flatness of high-frequency printed circuit boards includes a worktable 5 and a mounting assembly 6 disposed on the worktable 5 for placing two high-frequency printed circuit boards 1 to be tested. Detection components B7 and A8 are also disposed on the worktable 5, located on the left and right sides of the mounting assembly 6, respectively. Multiple support frames are fixed to the bottom surface of the worktable 5, each support frame resting on the ground. Detection components A8 and B7 are symmetrically arranged about the left and right sides of the mounting assembly 6.

[0062] The detection component A8 includes a horizontal cylinder 9 fixed to the workbench 5 and a concave part 10 with an upward opening fixed to the piston rod of the horizontal cylinder 9. A horizontal plate 11 extending to the left is fixed to the left end face of the left side plate of the concave part 10. A bent plate 12 is provided on the extended end of the horizontal plate 11, and the inclined part of the bent plate 12 is connected to the horizontal plate 11. The detection component A8 also includes a base 27 fixed to the workbench 5. The cylinder body of the horizontal cylinder 9 is fixed to the right end face of the base 27. The piston rod of the horizontal cylinder 9 extends to the left through the base 27. The bottom wall of the concave part 10 is welded to the extended end of the piston rod of the horizontal cylinder 9.

[0063] A guide rod 13 slides through the right side plate of the concave part 10 and extends to the left side plate of the concave part 10. A movable plate 14 is fixedly mounted on the extended end of the guide rod 13. A drive motor 15 is fixedly mounted on the right side plate of the concave part 10. A gear 16 is mounted on the output shaft of the drive motor 15. A rack 17 meshes with the gear 16. The rack 17 passes through the right side plate and the left side plate of the concave part 10 sequentially to the left, and its extended end is fixed on the right end face of the movable plate 14.

[0064] A support plate 18 is fixedly mounted on the left end face of the movable plate 14, located directly below the horizontal plate 11. The support plate 18 extends to the left directly below the bent plate 12, and a vertically arranged light rod 19 slides through the extended end. A mounting plate and a displacement sensor 20 are sequentially fixed at the bottom end of the light rod 19. A spring 21 is sleeved on the light rod 19. The upper and lower ends of the spring 21 are fixed to the support plate 18 and the mounting plate, respectively. A nylon roller 22 is rotatably mounted on the top end of the light rod 19. Under the elastic force of the spring 21, the nylon roller 22 abuts against the horizontal part of the bent plate 12.

[0065] The mounting assembly 6 includes a column 23 fixed to the workbench 5 and two connecting plates 24 fixed to the top surface of the column 23. Each of the two connecting plates 24 has a mounting seat 25 fixed to its outer end face. Each of the two mounting seats 25 has a mounting groove 26 extending through its outer end face on its top surface. The two mounting seats 25 are arranged symmetrically about the column 23.

[0066] A through groove 28 is provided in the left side plate of the concave component 10, and the guide rod 13 and the rack 17 are both arranged through the through groove 28. The detection device also includes a controller, which is electrically connected to the horizontal cylinder 9, the drive motor 15 and the displacement sensor 20 via signal lines. The operator can control the extension or retraction of the piston rod of the horizontal cylinder 9 through the controller, and can also control the start or stop of the drive motor 15, thereby facilitating the operator's operation.

[0067] A method for efficiently detecting the flatness of high-frequency printed circuit boards includes the following steps:

[0068] S1. The worker takes out two high-frequency printed circuit boards 1 to be tested, and places one of the high-frequency printed circuit boards 1 to be tested into the placement slot 26 of the placement seat 25 of the testing component A8, such as... Figure 14 As shown, another high-frequency printed circuit board 1 to be tested is placed into the mounting slot 26 of the mounting base 25 of the testing component B7.

[0069] S2. The piston rods of the horizontal cylinder 9 of detection component A8 and the horizontal cylinder 9 of detection component B7 both extend inward. The piston rods drive the concave part 10 to move inward. The concave part 10 drives the drive motor 15, gear 16, rack 17, guide rod 13, moving plate 14, horizontal plate 11, and support plate 18 to move inward synchronously. The support plate 18 drives the displacement sensor 20 to move inward synchronously. When the piston rods of the horizontal cylinder 9 of detection component A8 and the horizontal cylinder 9 of detection component B7 are fully extended, the displacement sensor 20 of detection component A8 moves to just above the left end of the right-side mounting base 25. Figure 15 As shown, at the same time, the displacement sensor 20 of the detection component B7 moves to just above the right end of the left mounting base 25;

[0070] S3. The drive motor 15 of the control detection component A8 rotates forward. The drive motor 15 of the detection component A8 drives the gear 16 to rotate clockwise. The gear 16 drives the rack 17 to move to the right in a straight line. The rack 17 drives the moving plate 14 to move to the right in a straight line. The moving plate 14 drives the guide rod 13 and the support plate 18 to move to the right in a straight line. The support plate 18 drives the light rod 19 to move to the right in a straight line. The light rod 19 drives the spring 21, the nylon roller 22 and the displacement sensor 20 on it to move to the right in a straight line.

[0071] As the nylon roller 22 of the detection component A8 moves from the horizontal part of the bending plate 12 to the inclined part of the bending plate 12, such as Figure 16 As shown, the nylon roller 22 drives the light rod 19 to move downwards gradually, and the light rod 19 drives the displacement sensor 20 to move towards the top surface of the right high-frequency printed circuit board 1. At the same time, the displacement sensor 20 also gradually stretches the spring 21 downwards.

[0072] When the nylon roller 22 of the detection component A8 moves from the inclined part of the bending plate 12 onto the horizontal plate 11, the displacement sensor 20 just presses against the top surface of the left end of the high-frequency printed circuit board 1 on the right side, as shown. Figure 17 As shown, when displacement sensor 20 moves upward, it sends a displacement signal to the controller; as nylon roller 22 moves linearly to the right along the horizontal plate 11, displacement sensor 20 also moves linearly to the right along the top surface of the high-frequency printed circuit board 1. The direction of movement of displacement sensor 20 is as follows: Figure 18 As indicated by the solid arrow in the center;

[0073] During the movement, if the displacement sensor 20 continuously sends displacement signals of different values ​​to the controller in real time, it indicates that the flatness of the high-frequency printed circuit board 1 does not meet the requirements [because the wrinkles on the surface of the high-frequency printed circuit board 1 push the displacement sensor 20 upward, causing the displacement sensor 20 to move. After the displacement sensor 20 moves, it sends a displacement signal to the controller]. Therefore, the high-frequency printed circuit board 1 on the right is determined to be a defective product.

[0074] If the displacement sensor 20 does not send a displacement signal of different values ​​to the controller when it moves to the right end of the high-frequency printed circuit board 1, it indicates that the flatness of the high-frequency printed circuit board 1 meets the requirements [because the surface of the high-frequency printed circuit board 1 is flat and will not push the displacement sensor 20 upward], and thus the high-frequency printed circuit board 1 on the right side is determined to be a qualified product.

[0075] In step S3, the worker only needs to start the drive motor 15 of the detection component A8 so that the displacement sensor 20 automatically presses against the top surface of the left end of the high-frequency printed circuit board 1, and then automatically moves to the right in a straight line while adhering to the top surface of the high-frequency printed circuit board 1. Finally, by judging the displacement signal fed back by the displacement sensor 20, it is determined whether the high-frequency printed circuit board 1 being detected is a defective or qualified product.

[0076] Therefore, it can be seen that this detection device is superior to... Figures 1-3The detection method shown eliminates the need for workers to manually support the detection rod 4 of the dial indicator 3 on the top surface of the left end of the high-frequency printed circuit board 1, nor does it require workers to move the dial indicator 3 horizontally to complete the flatness detection of a high-frequency printed circuit board 1. Instead, this detection device can automatically complete the flatness detection of a high-frequency printed circuit board 1 with just one start action of the drive motor 15. This not only greatly reduces the workload of workers, but also shortens the detection time for a single high-frequency printed circuit board 1, thereby enabling the flatness detection of all high-frequency printed circuit boards 1 in the workshop to be completed in a short time, thus greatly improving the detection efficiency of the flatness of high-frequency printed circuit boards 1.

[0077] S4. The drive motor 15 of the control detection component B7 reverses, the drive motor 15 drives the gear 16 to rotate counterclockwise, the gear 16 drives the rack 17 to move to the left in a straight line, so that the displacement sensor 20 of the detection component B7 first presses onto the top surface of the right end of the high frequency printed circuit board 1 on the left side, and then the displacement sensor 20 moves to the left in a straight line along the top surface of the high frequency printed circuit board 1.

[0078] If, during the movement, the displacement sensor 20 continuously sends displacement signals of different values ​​to the controller in real time, it indicates that the flatness of the high-frequency printed circuit board 1 does not meet the requirements, and thus the high-frequency printed circuit board 1 on the left side is determined to be a defective product.

[0079] If the displacement sensor 20 does not send a displacement signal of different values ​​to the controller when it moves to the left end of the high-frequency printed circuit board 1, it indicates that the flatness of the high-frequency printed circuit board 1 meets the requirements, and the high-frequency printed circuit board 1 on the left side is determined to be a qualified product, thus finally realizing the flatness detection of the two high-frequency printed circuit boards 1.

[0080] S5. Workers can repeat steps S1 to S4 multiple times to complete the flatness inspection of all high-frequency printed circuit boards 1 in the workshop.

[0081] As can be seen from steps S1 to S5, after the worker places two high-frequency printed circuit boards 1 to be tested on the placement component 6, it is only necessary to control the linkage between the horizontal cylinder 9 of the detection component A8 and the drive motor 15 of the detection component B7 to detect the flatness of the two high-frequency printed circuit boards 1 at one time. Compared with... Figures 1-3The detection method shown eliminates the need for workers to inspect the flatness of high-frequency printed circuit boards 1 one by one. The number of high-frequency printed circuit boards 1 that this detection device can inspect at the same time is twice that of the original method. This allows the flatness of all high-frequency printed circuit boards 1 in the workshop to be inspected in a short time, thereby greatly improving the efficiency of flatness inspection of high-frequency printed circuit boards 1.

Claims

1. A method for efficiently detecting the flatness of a high-frequency printed circuit board, the method employing a detection device for efficiently detecting the flatness of a high-frequency printed circuit board, the device comprising a worktable (5) and a placement assembly (6) disposed on the worktable (5) for placing two high-frequency printed circuit boards (1) to be detected, and detection assembly B (7) and detection assembly A (8) respectively located on the left and right sides of the placement assembly (6); the detection assembly A (8) and detection assembly B (7) are symmetrically arranged about the left and right sides of the placement assembly (6); The mounting assembly (6) includes a column (23) fixed on the workbench (5) and two connecting plates (24) fixed on the top surface of the column (23). Each of the two connecting plates (24) has a mounting seat (25) fixed on its outer end face. Each of the two mounting seats (25) has a mounting groove (26) that penetrates its outer end face on its top surface. The two mounting seats (25) are symmetrically arranged about the left and right sides of the column (23). The detection component A (8) includes a horizontal cylinder (9) fixed on the workbench (5) and a concave part (10) with an upward opening fixed on the piston rod of the horizontal cylinder (9). A horizontal plate (11) extending to the left is fixed on the left end face of the left side plate of the concave part (10). A bent plate (12) is provided on the extended end of the horizontal plate (11). The inclined part of the bent plate (12) is connected to the horizontal plate (11). A guide rod (13) that slides through the right side plate of the concave part (10) and extends to the left side plate of the concave part (10) is slidably passed through it. A movable plate (14) is fixedly mounted on the extended end of the guide rod (13). A drive motor (15) is fixedly mounted on the right side plate of the concave part (10). A gear (16) is mounted on the output shaft of the drive motor (15). A rack (17) meshes with the gear (16). The rack (17) passes through the right side plate and the left side plate of the concave part (10) sequentially to the left, and its extended end is fixed on the right end face of the movable plate (14). A support plate (18) located directly below the horizontal plate (11) is fixedly mounted on the left end face of the movable plate (14). The support plate (18) extends to the left directly below the bent plate (12), and a vertically arranged light rod (19) slides through the extended end. A mounting plate and a displacement sensor (20) are sequentially fixed at the bottom end of the light rod (19). A spring (21) is sleeved on the light rod (19). The upper and lower ends of the spring (21) are fixed to the support plate (18) and the mounting plate, respectively. A nylon roller (22) is rotatably mounted on the top end of the light rod (19). Under the elastic force of the spring (21), the nylon roller (22) abuts against the horizontal part of the bent plate (12). The feature is that: The method includes the following steps: S1. The worker takes out two high-frequency printed circuit boards (1) to be tested, puts one high-frequency printed circuit board (1) to be tested into the placement slot (26) of the placement seat (25) of the testing component A (8), and puts the other high-frequency printed circuit board (1) to be tested into the placement slot (26) of the placement seat (25) of the testing component B (7). S2. The piston rods of the horizontal cylinder (9) of the control detection component A (8) and the horizontal cylinder (9) of the detection component B (7) both extend inward. The piston rods drive the concave part (10) to move inward. The concave part (10) drives the drive motor (15), gear (16), rack (17), guide rod (13), moving plate (14), horizontal plate (11) and support plate (18) to move inward synchronously. The support plate (18) drives the displacement sensor (20) to move inward synchronously. When the piston rods of the horizontal cylinder (9) of the detection component A (8) and the horizontal cylinder (9) of the detection component B (7) are fully extended, the displacement sensor (20) of the detection component A (8) just moves to the top of the left end of the right side of the mounting base (25). At the same time, the displacement sensor (20) of the detection component B (7) just moves to the top of the right end of the left side of the mounting base (25). S3. The drive motor (15) of the control detection component A (8) rotates forward. The drive motor (15) of the detection component A (8) drives the gear (16) to rotate clockwise. The gear (16) drives the rack (17) to move to the right in a straight line. The rack (17) drives the moving plate (14) to move to the right in a straight line. The moving plate (14) drives the guide rod (13) and the support plate (18) to move to the right in a straight line. The support plate (18) drives the light rod (19) to move to the right in a straight line. The light rod (19) drives the spring (21), nylon roller (22) and displacement sensor (20) on it to move to the right in a straight line. As the nylon roller (22) of the detection component A (8) moves from the horizontal part of the bending plate (12) to the inclined part of the bending plate (12), the nylon roller (22) drives the light rod (19) to move downward gradually. The light rod (19) drives the displacement sensor (20) to move towards the top surface of the right high-frequency printed circuit board (1). At the same time, the displacement sensor (20) also gradually stretches the spring (21) downward. When the nylon roller (22) of the detection component A (8) moves from the inclined part of the bending plate (12) to the horizontal plate (11), the displacement sensor (20) just presses against the top surface of the left end of the high-frequency printed circuit board (1) on the right side. When the displacement sensor (20) moves upward, it sends a displacement signal to the controller. As the nylon roller (22) moves to the right along the horizontal plate (11), the displacement sensor (20) also moves to the right along the top surface of the high-frequency printed circuit board (1). If the displacement sensor (20) sends displacement signals of different values ​​to the controller in real time and continuously during the movement, it indicates that the flatness of the high-frequency printed circuit board (1) does not meet the requirements, and the high-frequency printed circuit board (1) on the right side is determined to be a defective product. If the displacement sensor (20) does not send a displacement signal of different values ​​to the controller when it moves to the right end of the high-frequency printed circuit board (1), it indicates that the flatness of the high-frequency printed circuit board (1) meets the requirements, and the high-frequency printed circuit board (1) on the right side is determined to be a qualified product. S4. Control the drive motor (15) of the detection component B (7) to reverse, drive the gear (16) to rotate counterclockwise, and the gear (16) to drive the rack (17) to move to the left in a straight line, so that the displacement sensor (20) of the detection component B (7) first presses onto the top surface of the right end of the high frequency printed circuit board (1) on the left side, and then the displacement sensor (20) moves to the left in a straight line along the top surface of the high frequency printed circuit board (1); If, during the movement, the displacement sensor (20) sends displacement signals of different values ​​to the controller in real time and continuously, it indicates that the flatness of the high-frequency printed circuit board (1) does not meet the requirements, and the high-frequency printed circuit board (1) on the left side is determined to be a defective product. If the displacement sensor (20) moves to the left end of the high-frequency printed circuit board (1) and the displacement sensor (20) does not send a displacement signal of different values ​​to the controller, it indicates that the flatness of the high-frequency printed circuit board (1) meets the requirements, and then the high-frequency printed circuit board (1) on the left is determined to be a qualified product, thus finally realizing the flatness detection of the two high-frequency printed circuit boards (1). S5. Workers can repeat steps S1 to S4 multiple times to complete the flatness test of all high-frequency printed circuit boards (1) in the workshop.

2. The method for efficiently detecting the flatness of a high-frequency printed circuit board according to claim 1, characterized in that: Multiple support frames are fixed on the bottom surface of the workbench (5), and each support frame is supported on the ground.

3. The method for efficiently detecting the flatness of a high-frequency printed circuit board according to claim 2, characterized in that: The detection component A (8) also includes a base (27) fixed on the workbench (5) surface. The cylinder body of the horizontal cylinder (9) is fixed on the right end face of the base (27). The piston rod of the horizontal cylinder (9) extends to the left through the base (27). The bottom wall of the concave part (10) is welded to the extension end of the piston rod of the horizontal cylinder (9).

4. The method for efficiently detecting the flatness of a high-frequency printed circuit board according to claim 3, characterized in that: The concave part (10) has a through groove (28) in the left side plate, and the guide rod (13) and the rack (17) are both arranged through the through groove (28).

5. The method for efficiently detecting the flatness of a high-frequency printed circuit board according to claim 4, characterized in that: The detection device also includes a controller, which is electrically connected to the horizontal cylinder (9), the drive motor (15) and the displacement sensor (20) via signal lines.

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