A camera calibration system and method applied to a scanning translation pen

Abstract

This invention discloses a camera calibration system and method for scanning translation pens, belonging to the technical field of camera calibration for translation pens. The system and method include a mounting frame and a reference coordinate grid installed inside it. A second connecting plate is provided at the top of the mounting frame, and a support frame is provided at the end of the second connecting plate. A translation pen channel is provided inside the support frame, and a support plate is provided on one side of the support frame. Conveyor belts are provided on the top of the support plates on both sides of the translation pen channel. This camera calibration system and method for scanning translation pens mechanically aligns the camera end of the translation pen with the center point of the reference coordinate grid, greatly reducing the influence of manual operation, increasing the accuracy of calibration, better securing the translation pen, and automatically retrieving the translation pen, thus increasing the efficiency of camera calibration for scanning translation pens.

Description

Technical Field

[0001] This invention relates to the field of camera calibration technology for translation pens, and more specifically, to a camera calibration system and method for scanning translation pens. Background Technology

[0002] CN202210411161.4 proposes a camera calibration method and system for a scanning translation pen, relating to the field of scanning translation pen technology. By activating a pre-set calibration program within the pen, the acquired image is preprocessed and the image to be detected is selected. Then, the coordinates of the boundary points of the image to be detected are captured. Next, starting from the center point of the image to be detected, several pixels are continuously selected along the Y-axis and X-axis directions. By assigning these pixels high or wide values ​​from small to large, the coordinate data of the effective viewport boundary line is detected, determined, and stored, thus completing the calibration process. This method can calibrate the effective viewport boundary line of the camera in one go after the scanning translation pen is manufactured, and the calibration process is simple and efficient.

[0003] The aforementioned technology enables the calibration of the effective viewpoint boundary of the camera. The calibration process is simple and efficient. However, the alignment between the translation pen camera and the center of the reference coordinate grid may be misaligned due to human factors, resulting in a low overall calibration accuracy. Currently, the calibration of translation pen cameras is performed one by one, which is obviously slow for mass-produced translation pens. Furthermore, the translation pen cameras need to be packaged after calibration, which currently requires manual collection and packaging, resulting in low efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a camera calibration system and method for use in scanning translation pens, in order to solve the problems mentioned in the background art above:

[0005] The alignment of the existing translation pen camera with the center of the reference coordinate grid may be misaligned due to human factors, resulting in a low overall calibration accuracy. Currently, the calibration of translation pen cameras is performed one by one, which is obviously slow for mass-produced translation pens. Furthermore, the translation pen cameras need to be packaged after calibration, which currently requires manual collection and packaging, resulting in low efficiency.

[0006] A camera calibration system for a scanning translation pen includes a mounting frame and a reference coordinate grid installed inside it. A second connecting plate is provided at the top of the mounting frame, and a support frame is provided at the end of the second connecting plate. A translation pen channel is provided inside the support frame, and a support plate is provided on one side of the support frame. Conveyor belts are provided on the top of the support plates on both sides of the translation pen channel. A movable block is movably connected inside the second connecting plate. A third slot is opened inside the movable block, and a clamping component is provided inside the third slot. A translation pen storage box is provided below the mounting frame on one side of the support frame.

[0007] Preferably, the second connecting plate has a first slot inside that matches the movable block, the inner wall of the first slot has a T-shaped groove, and the side surface of the movable block has a T-shaped slider that matches the T-shaped groove.

[0008] Preferably, the inner wall of the T-slot is provided with a second toothed plate, the side surface of the T-slide block is provided with a fourth slot, a motor is installed inside the fourth slot, and the output end of the motor is provided with a second gear that meshes with the second toothed plate.

[0009] Preferably, the clamping assembly includes a U-shaped clamping plate and a trapezoidal block, the U-shaped clamping plate being disposed inside the third slot, and the trapezoidal block being elastically connected to the bottom of the inner wall of the U-shaped clamping plate.

[0010] Preferably, the bottom of the U-shaped clamp is provided with a first sliding groove, the inner wall of the first sliding groove is provided with a fifth groove, the surface of the trapezoidal block is provided with an L-shaped slider that matches the fifth groove, a first spring is provided between the L-shaped slider and the fifth groove, the trapezoidal block is slidably connected to the first sliding groove through the L-shaped slider provided in the fifth groove, and the trapezoidal block is elastically connected to the fifth groove through the first spring provided on the side surface of the L-shaped slider.

[0011] Preferably, the top of the trapezoidal block is provided with a slope.

[0012] Preferably, the upper surface of the movable block on one side of the third slot is provided with two fixing plates, and a bidirectional screw is provided between the fixing plates. The surface of the bidirectional screw is provided with a first connecting plate that connects to the U-shaped clamp. The first connecting plate is slidably connected to the upper surface of the movable block. Both ends of the bidirectional screw on the outside of the fixing plate are provided with a first gear. The surface of the second connecting plate above the translation pen storage box is provided with a first toothed plate that matches the first gear.

[0013] Preferably, the interior of the translation pen storage box is provided with a ramp.

[0014] Preferably, a second slot is provided on the side surface of the translation pen channel above the support frame, and a sixth slot is provided on the side of the translation pen channel below the support frame near the mounting frame.

[0015] Preferably, a U-shaped mounting frame is provided on the upper surface of the second connecting plate between the support frame and the first toothed plate. A screw is threadedly connected to the inside of the U-shaped mounting frame. An operating disc is provided at one end of the screw above the U-shaped mounting frame, and a trapezoidal pressure block is provided at one end of the screw below the U-shaped mounting frame.

[0016] A camera calibration method for use in a scanning translation pen, comprising the following steps:

[0017] S1: First, the staff places the translation pen between the conveyor belts. The two conveyor belts clamp and transport the translation pen to the translation pen channel. The translation pen is blocked by the translation pen channel, while the conveyor belt continues to rotate. Under the action of gravity, the translation pen enters the translation pen channel and then enters the U-shaped clamping plate.

[0018] S2: Then, the movable block moves the translation pen between the U-shaped clamps. When it moves to the bottom of the trapezoidal pressure block, the translation pen is squeezed downwards and enters between the two trapezoidal blocks. When the movable block reaches the mounting frame, the camera end of the translation pen is aligned with the center point of the reference coordinate grid. Then, the camera of the scanning translation pen is calibrated by manually reading the design coordinate values.

[0019] Compared with the prior art, the advantages of this invention are:

[0020] 1) In use, the camera calibration system for this scanning translation pen uses a conveyor belt to clamp and transport the translation pen. The translation pen is blocked by the translation pen channel and enters the space between U-shaped clamps through the translation pen channel. Then, a movable block drives the translation pen between the U-shaped clamps to move. The translation pen is squeezed downward by a trapezoidal pressure block and enters the space between two trapezoidal blocks. When the movable block reaches the mounting frame, the camera end of the translation pen is just aligned with the center point of the reference coordinate grid. Then, the camera of the scanning translation pen is calibrated by manually reading the design coordinate values. The mechanical alignment of the camera end of the translation pen with the center point of the reference coordinate grid greatly reduces the influence of manual operation and increases the accuracy of calibration.

[0021] 2) In use, the camera calibration system applied to the scanning translation pen works by using a movable block to drive the translation pen in the opposite direction. When the first gear passes the first toothed plate, the first toothed plate causes the first gear to rotate, which in turn causes the bidirectional screw to rotate, causing the first connecting plate to move in the opposite direction, which in turn causes the U-shaped clamping plate to move in the opposite direction. At this time, the trapezoidal block loses its restraint on the translation pen, and the translation pen enters the translation pen storage box. When the movable block drives the translation pen to move towards the mounting frame, when it passes the first toothed plate, the first toothed plate causes the first gear to rotate, which in turn causes the bidirectional screw to rotate, causing the first connecting plate to move in the opposite direction, which in turn causes the U-shaped clamping plate to move in opposite directions. At this time, the trapezoidal block better restrains the translation pen, which can better fix the translation pen and can automatically retract the translation pen, increasing the efficiency of camera calibration of the scanning translation pen. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the overall side structure of the present invention;

[0024] Figure 3 for Figure 1 A magnified view of part A in the image;

[0025] Figure 4 This is a schematic diagram of the T-shaped slider structure of the present invention;

[0026] Figure 5 This is a schematic diagram of the second toothed plate structure of the present invention;

[0027] Figure 6 This is a schematic diagram of the first spring structure of the present invention;

[0028] Figure 7 This is a schematic diagram of the trapezoidal block structure of the present invention.

[0029] The following are the labeling symbols in the diagram: 1. Mounting frame; 2. Reference coordinate grid; 3. First slot; 4. T-slot; 5. Movable block; 6. First toothed plate; 7. Translator pen storage box; 8. Ramp; 9. Support frame; 10. Translator pen channel; 11. Support plate; 12. Conveyor belt; 13. Second slot; 14. U-shaped mounting frame; 15. Operation panel; 16. Third slot; 17. U-shaped clamp; 18. First connecting plate; 19. Bidirectional screw; 20. Fixing plate; 21. First gear; 22. T-slide block; 23. Fourth slot; 24. Second gear; 25. Trapezoidal block; 26. First slide groove; 27. Fifth slot; 28. First spring; 29. ​​Second connecting plate; 30. Sixth slot; 31. Inclined surface; 32. Second toothed plate; 33. L-shaped slide block; 34. Trapezoidal pressure block. Detailed Implementation

[0030] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0031] In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0032] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0033] Example 1:

[0034] The alignment of the existing translation pen camera with the center of the reference coordinate grid may be misaligned due to human factors, resulting in a low overall calibration accuracy. Currently, the calibration of translation pen cameras is performed one by one, which is obviously slow for mass-produced translation pens. The following solution is used to solve this problem.

[0035] Please see Figures 1 to 7A camera calibration system for a scanning translation pen includes a mounting frame 1 and a reference coordinate grid 2 installed inside it. A second connecting plate 29 is provided at the top of the mounting frame 1, and a support frame 9 is provided at the end of the second connecting plate 29. A translation pen channel 10 is provided inside the support frame 9 for conveying the translation pen. A support plate 11 is provided on one side of the support frame 9, and a conveyor belt 12 is provided on the top of the support plates 11 on both sides of the translation pen channel 10 for conveying the translation pen. A movable block 5 is movably connected inside the second connecting plate 29. A third slot 16 is formed inside the movable block 5, and a clamping assembly is provided inside the third slot 16 for clamping the translation pen. The mounting frame 1 is mounted on one side of the support frame 9. Below the translation pen storage box 7 is provided for storing the translation pens. The conveyor belt 12 clamps and transports the translation pens. The translation pens are blocked by the translation pen channel 10 and enter the space between the U-shaped clamps 17 through the translation pen channel 10. Then, the movable block 5 drives the translation pens between the U-shaped clamps 17 to move. The translation pens are squeezed downward by the trapezoidal pressure block 34 and enter the space between the two trapezoidal blocks 25. When the movable block 5 reaches the mounting frame 1, the camera end of the translation pen is just aligned with the center point of the reference coordinate grid 2. Then, the camera of the scanning translation pen is calibrated by manually reading the design coordinate values. The alignment of the camera end of the translation pen with the center point of the reference coordinate grid 2 is achieved mechanically, which greatly reduces the influence of manual operation and increases the accuracy of calibration.

[0036] As a further embodiment of the present invention: a second slot 13 is provided on the side surface of the translation pen channel 10 above the support frame 9, and a sixth slot 30 is provided on the side of the translation pen channel 10 below the support frame 9 near the mounting frame 1. The second slot 13 facilitates the entry of the translation pen into the translation pen channel 10, and the sixth slot 30 facilitates the exit of the translation pen from the translation pen channel 10.

[0037] As a further embodiment of the present invention: a U-shaped mounting frame 14 is provided on the upper surface of the second connecting plate 29 between the support frame 9 and the first toothed plate 6. A screw is threadedly connected to the inside of the U-shaped mounting frame 14. An operating disc 15 is provided at one end of the screw above the U-shaped mounting frame 14, and a trapezoidal pressure block 34 is provided at one end of the screw below the U-shaped mounting frame 14. The operating disc 15 can drive the screw to rotate, thereby adjusting the height of the trapezoidal pressure block 34. An inclined surface is provided on the side of the trapezoidal pressure block 34 near the support frame 9.

[0038] As a further embodiment of the present invention: the interior of the second connecting plate 29 is provided with a first slot 3 that matches the movable block 5, the inner wall of the first slot 3 is provided with a T-shaped groove 4, and the side surface of the movable block 5 is provided with a T-shaped slider 22 that matches the T-shaped groove 4. The movable block 5 is slidably connected to the first slot 3 through the T-shaped slider 22 in the T-shaped groove 4.

[0039] As a further aspect of the present invention: the inner wall of the T-slot 4 is provided with a second toothed plate 32, and the side surface of the T-slot 22 is provided with a fourth slot 23. A motor is installed inside the fourth slot 23. The motor is a conventional forward and reverse reversible motor in the prior art. The motor can drive the second gear 24 to rotate. The output end of the motor is provided with a second gear 24 that meshes with the second toothed plate 32.

[0040] As a further aspect of the present invention: the clamping assembly includes a U-shaped clamping plate 17 and a trapezoidal block 25. The U-shaped clamping plate 17 is disposed inside the third slot 16, and the bottom of the inner wall of the U-shaped clamping plate 17 is elastically connected to the trapezoidal block 25, which can limit the position of the translation pen.

[0041] As a further embodiment of the present invention: a first groove 26 is provided at the bottom of the U-shaped clamp 17, a fifth groove 27 is provided on the inner wall of the first groove 26, an L-shaped slider 33 matching the fifth groove 27 is provided on the surface of the trapezoidal block 25, the trapezoidal block 25 is slidably connected to the first groove 26 through the L-shaped slider 33 provided in the fifth groove 27, a first spring 28 is provided between the L-shaped slider 33 and the fifth groove 27, the trapezoidal block 25 is slidably connected to the first groove 26 through the L-shaped slider 33 provided in the fifth groove 27, the trapezoidal block 25 is elastically connected to the fifth groove 27 through the first spring 28 provided on the side surface of the L-shaped slider 33, and an inclined surface 31 is provided at the top of the trapezoidal block 25, the inclined surface 31 facilitates the entry of the translation pen between the two trapezoidal blocks 25.

[0042] The steps of using this invention are as follows: When using the camera calibration system and method for scanning translation pens, the operator first places the translation pen between two conveyor belts 12. The two conveyor belts 12 clamp and transport the translation pen to the translation pen channel 10. The translation pen is blocked by the translation pen channel 10, while the conveyor belts 12 continue to rotate. Under the action of gravity, the translation pen enters the translation pen channel 10 and passes through the translation pen channel 10 into the space between U-shaped clamps 17. Then, the movable block 5 drives the translation pen between the U-shaped clamps 17 to move. When it moves to the bottom of the trapezoidal pressure block 34, the translation pen is squeezed downward and enters the space between two trapezoidal blocks 25. When the movable block 5 reaches the mounting frame 1, the camera end of the translation pen is just aligned with the center point of the reference coordinate grid 2. Then, the camera of the scanning translation pen is calibrated by manually reading the design coordinate value. This scheme achieves the alignment of the camera end of the translation pen with the center point of the reference coordinate grid 2 through mechanical means, which greatly reduces the influence of manual operation and increases the accuracy of calibration.

[0043] Example 2:

[0044] After the translation pen camera is calibrated, it needs to be packaged. Currently, the translation pen camera needs to be manually collected and packaged after calibration, which is inefficient. The following solution is proposed to solve this problem.

[0045] Please see Figures 1 to 7 The difference from embodiment 1 is that two fixing plates 20 are provided on the upper surface of the movable block 5 on one side of the third slot 16, and a bidirectional screw 19 is provided between the fixing plates 20. The surface of the bidirectional screw 19 is provided with a first connecting plate 18 that connects to the U-shaped clamp 17. The inside of the first connecting plate 18 is provided with a screw hole that matches the bidirectional screw 19. The first connecting plate 18 is slidably connected to the upper surface of the movable block 5. Both ends of the bidirectional screw 19 on the outside of the fixing plate 20 are provided with a first gear 21. The surface of the second connecting plate 29 above the translation pen storage box 7 is provided with a first toothed plate 6 that matches the first gear 21. The movable block 5 drives the translation pen to move in the opposite direction. When the first gear 21 passes the first toothed plate 6... When the first gear 21 rotates, the first toothed plate 6 rotates, causing the bidirectional screw 19 to rotate, which in turn causes the first connecting plate 18 to move in the opposite direction, thereby causing the U-shaped clamping plate 17 to move in the opposite direction. At this time, the trapezoidal block 25 loses its restraint on the translation pen, and the translation pen enters the translation pen storage box 7. When the movable block 5 moves the translation pen towards the mounting frame 1, it passes the first toothed plate 6. The first toothed plate 6 rotates the first gear 21, which in turn causes the bidirectional screw 19 to rotate, causing the first connecting plate 18 to move in the opposite direction, thereby causing the U-shaped clamping plate 17 to move in the opposite direction. At this time, the trapezoidal block 25 better restrains the translation pen, which can better fix the translation pen and can automatically recycle the translation pen, increasing the efficiency of camera calibration of the translation pen.

[0046] As a further aspect of the present invention, the interior of the translation pen storage box 7 is provided with a ramp 8, which reduces the impact when the translation pen falls.

[0047] The invention is applied to the camera calibration system and method for scanning translation pens. After the camera calibration of the scanning translation pen is completed, the movable block 5 drives the translation pen to move in the opposite direction. When the first gear 21 passes the first toothed plate 6, the first toothed plate 6 causes the first gear 21 to rotate, which in turn causes the bidirectional screw 19 to rotate, causing the first connecting plate 18 to move in the opposite direction, which in turn causes the U-shaped clamping plate 17 to move in the opposite direction. At this time, the trapezoidal block 25 loses its restraint on the translation pen, and the translation pen enters the translation pen storage box 7. It is worth mentioning that when the movable block 5 drives the translation pen to move towards the mounting frame 1, when it passes the first toothed plate 6, the first toothed plate 6 causes the first gear 21 to rotate, which in turn causes the bidirectional screw 19 to rotate, causing the first connecting plate 18 to move in the opposite direction, which in turn causes the U-shaped clamping plate 17 to move in the opposite direction. At this time, the trapezoidal block 25 better restrains the translation pen. This solution can better fix the translation pen and can automatically recycle the translation pen, increasing the efficiency of camera calibration of the scanning translation pen.

[0048] A camera calibration method for use in a scanning translation pen, comprising the following steps:

[0049] S1: First, the staff places the translation pen between the conveyor belts 12. The two conveyor belts 12 clamp and transport the translation pen to the translation pen channel 10. The translation pen is blocked by the translation pen channel 10, while the conveyor belts 12 continue to rotate. The translation pen enters the translation pen channel 10 under the action of gravity and enters the U-shaped clamps 17 through the translation pen channel 10.

[0050] S2: Then, the movable block 5 moves the translation pen between the U-shaped clamps 17. When it moves to the bottom of the trapezoidal pressure block 34, the translation pen is squeezed downward and enters between the two trapezoidal blocks 25. When the movable block 5 reaches the mounting frame 1, the camera end of the translation pen is just aligned with the center point of the reference coordinate grid 2. Then, the camera of the scanning translation pen is calibrated by manually reading the design coordinate values.

[0051] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A camera calibration system for a scanning translation pen, comprising a mounting frame (1) and a reference coordinate grid (2) mounted therein, characterized in that: The top of the mounting frame (1) is provided with a second connecting plate (29), the end of the second connecting plate (29) is provided with a support frame (9), the inside of the support frame (9) is provided with a translation pen channel (10), the side of the support frame (9) is provided with a support plate (11), the top of the support plates (11) on both sides of the translation pen channel (10) is provided with a conveyor belt (12), the inside of the second connecting plate (29) is movably connected with a movable block (5), the inside of the movable block (5) is provided with a third slot (16), the inside of the third slot (16) is provided with a clamping component, and the bottom of the mounting frame (1) on one side of the support frame (9) is provided with a translation pen storage box (7). The clamping assembly includes a U-shaped clamp (17) and a trapezoidal block (25). The U-shaped clamp (17) is disposed inside the third slot (16), and the trapezoidal block (25) is elastically connected to the bottom of the inner wall of the U-shaped clamp (17). A U-shaped mounting frame (14) is provided on the upper surface of the second connecting plate (29) between the support frame (9) and the first toothed plate (6). A screw is threaded inside the U-shaped mounting frame (14). An operating plate (15) is provided at one end of the screw above the U-shaped mounting frame (14), and a trapezoidal pressure block (34) is provided at one end of the screw below the U-shaped mounting frame (14).

2. The camera calibration system for a scanning translation pen according to claim 1, characterized in that: The second connecting plate (29) has a first slot (3) inside that matches the movable block (5). The inner wall of the first slot (3) is provided with a T-shaped groove (4). The side surface of the movable block (5) is provided with a T-shaped slider (22) that matches the T-shaped groove (4).

3. The camera calibration system for a scanning translation pen according to claim 2, characterized in that: The inner wall of the T-slot (4) is provided with a second toothed plate (32), and the side surface of the T-slot (22) is provided with a fourth slot (23). A motor is installed inside the fourth slot (23), and the output end of the motor is provided with a second gear (24) that meshes with the second toothed plate (32).

4. The camera calibration system for a scanning translation pen according to claim 1, characterized in that: The bottom of the U-shaped clamp (17) is provided with a first groove (26), and the inner wall of the first groove (26) is provided with a fifth groove (27). The surface of the trapezoidal block (25) is provided with an L-shaped slider (33) that matches the fifth groove (27). A first spring (28) is provided between the L-shaped slider (33) and the fifth groove (27). The trapezoidal block (25) is slidably connected to the first groove (26) through the L-shaped slider (33) provided in the fifth groove (27). The trapezoidal block (25) is elastically connected to the fifth groove (27) through the first spring (28) provided on the side surface of the L-shaped slider (33).

5. The camera calibration system for a scanning translation pen according to claim 1, characterized in that: The top of the trapezoidal block (25) is provided with a slope (31).

6. The camera calibration system for a scanning translation pen according to claim 2, characterized in that: Two fixing plates (20) are provided on the upper surface of the movable block (5) on one side of the third slot (16). A bidirectional screw (19) is provided between the fixing plates (20). A first connecting plate (18) connected to the U-shaped clamp (17) is provided on the surface of the bidirectional screw (19). The first connecting plate (18) is slidably connected to the upper surface of the movable block (5). A first gear (21) is provided at both ends of the bidirectional screw (19) on the outside of the fixing plate (20). A first tooth plate (6) matching the first gear (21) is provided on the surface of the second connecting plate (29) above the translation pen storage box (7). A ramp (8) is provided inside the translation pen storage box (7).

7. The camera calibration system for a scanning translation pen according to claim 1, characterized in that: A second slot (13) is provided on the side surface of the translation pen channel (10) above the support frame (9), and a sixth slot (30) is provided on the side of the translation pen channel (10) below the support frame (9) near the mounting frame (1).

8. A camera calibration method for a scanning translation pen, referring to the camera calibration system for a scanning translation pen according to any one of claims 1-7, the steps of which are as follows: S1: First, the staff places the translation pen between the conveyor belts (12), and the two conveyor belts (12) clamp and transport the translation pen to the translation pen channel (10). The translation pen is blocked by the translation pen channel (10), while the conveyor belts (12) continue to rotate. The translation pen enters the translation pen channel (10) under the action of gravity and enters the U-shaped clamps (17) through the translation pen channel (10); S2: Then the movable block (5) drives the translation pen between the U-shaped clamps (17) to move. When it moves to the bottom of the trapezoidal pressure block (34), the translation pen is squeezed downward and enters the space between the two trapezoidal blocks (25). When the movable block (5) reaches the mounting frame (1), the camera end of the translation pen is just aligned with the center point of the reference coordinate grid (2). Then, the camera of the scanning translation pen is calibrated by manually reading the design coordinate value.

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