Laser projection positioning system and method for high-precision prefabricated construction mold table

Abstract

The invention discloses a laser projection positioning system and method for a high-precision prefabricated molding bench, and the system obtains the actual position coordinates of laser projection through the image feedback of a binocular camera, calculates the difference value between the actual position coordinates and the pre-calibrated position coordinates, and compares the difference value with a preset error threshold value. The laser projection is controlled to be switched between coarse adjustment and fine adjustment by the aid of the binocular camera, so that the precision of the laser projection can be improved by combining coarse adjustment of the rotary table and fine adjustment of the translation table with closed-loop feedback of the binocular camera, and miniaturization, precision and cost optimization of equipment are realized.

Description

Technical Field

[0001] The present invention relates to the field of industrial manufacturing technology, and in particular to a system and method for performing high-precision laser projection positioning on a prefabricated component mold platform, which can be used to guide mold placement and embedded part positioning for the production of prefabricated components. Background Art

[0002] In prefabricated component production, laser projection positioning for mold platforms often uses either laser galvanometers or DLP systems. Laser galvanometer systems, due to their component composition, are expensive, difficult to control with high precision, and exhibit weak persistence of vision over large projection areas. DLP systems, due to pixel limitations, have low precision and poor anti-disturbance capabilities.

[0003] Therefore, the existing mold table laser projection positioning system has technical problems of low precision, high cost and poor stability. It can be seen that there is an urgent need for a high-precision, low-cost and high-stability laser projection positioning solution to solve the problems existing in the existing technology. Summary of the Invention

[0004] In view of the technical problems of low precision, high cost and poor stability in the existing mold platform laser projection positioning system, the purpose of the present invention is to provide a high-precision prefabricated mold platform laser projection positioning system, which can accurately project the laser line to any specified position of the prefabricated component mold platform, thereby effectively guiding the precise placement of the mold and the accurate positioning of the embedded parts; on this basis, a high-precision prefabricated mold platform laser projection positioning method is also provided, which effectively overcomes the problems existing in the prior art.

[0005] In order to achieve the above-mentioned objectives, the present invention provides a high-precision prefabricated construction formwork platform laser projection positioning system, including a laser projection device and an image acquisition device. The image acquisition device is suspended or installed above the formwork platform working area or at a suitable position, and is used to capture and identify the actual position of the laser line projected by the laser projection device on the formwork platform in real time. It also includes a rotation device, a translation device and a control device. The rotation device is connected to the laser projection device and is used to control the laser projection device to rotate so as to adjust the projection angle of the laser projection device for coarse position adjustment. After the rotation device is connected to the laser projection device, it is integrally arranged on the translation device. The rotation device and the laser projection device can be translated along the translation device for fine position adjustment. The control device interacts with the image acquisition device, the rotation device and the translation device for data respectively, and is used to realize projection control and precision control of the laser projection positioning system.

[0006] Furthermore, the translation device includes a translation platform and a translation guide rail, the translation guide rail is arranged on the translation platform, and the rotation device and the laser projection device are integrally arranged on the translation guide rail and can move linearly along the translation guide rail.

[0007] Furthermore, the control device includes a first receiving unit, an analyzing unit, a second receiving unit, a calculating unit, a comparing unit, a first control unit and a second control unit;

[0008] The first receiving unit is used to receive a CAD drawing file;

[0009] The parsing unit interacts with the first receiving unit to convert the positioning information in the CAD drawing file received by the first receiving unit into a projection instruction of the laser projection device;

[0010] The second receiving unit interacts with the image acquisition device to receive the projection instruction converted by the analyzing unit and the feedback from the image acquisition device;

[0011] The computing unit interacts with the second receiving unit to identify the actual position coordinates of the laser line on the mold platform based on the image information fed back by the image acquisition device, and calculates the projection error between the actual position coordinates and the preset calibration coordinates;

[0012] The comparison unit interacts with the calculation unit data, and the comparison unit is used to compare the projection error calculated by the calculation unit with a preset error threshold to switch between the first control unit and the second control unit;

[0013] The first control unit interacts with the rotation device data, and if the projection error is greater than a preset error threshold, the first control unit controls the rotation device of the laser projection device to rotate for coarse adjustment according to the size of the error with the preset threshold;

[0014] The second control unit interacts with the rotation device data. If the projection error is less than a preset error threshold, the second control unit controls the rotation device to translate along the translation stage for fine adjustment according to the size of the error with the preset threshold.

[0015] Furthermore, the laser projection device includes at least one laser projection component.

[0016] To achieve the above-mentioned objectives, the present invention provides a high-precision prefabricated build mold platform laser projection positioning method, which is implemented in conjunction with the high-precision prefabricated build mold platform laser projection positioning system. The high-precision prefabricated build mold platform laser projection positioning method comprises the following steps:

[0017] S1: Start the control software, calibrate the binocular camera using the calibration points or calibration plate on the mold stage, and establish a coordinate system mapping;

[0018] S2: Import the CAD drawing file into the control software and analyze the coordinate information of the drawing and convert it into projection instructions;

[0019] S3: Setting an error switching threshold in the control software according to the projection device parameters;

[0020] S4: According to the instructions converted in S2, the rotating table in the laser projection device is controlled to rotate, and the laser beam emitted by the laser is projected onto the mold table after the angle of the rotating table is adjusted;

[0021] S5: The binocular camera captures the laser projection on the mold platform in real time. Through the image processing algorithm, it can accurately identify the actual position coordinates of the laser line on the mold platform and feed back to the control software;

[0022] S6: Calculate the error between the actual position coordinates of the laser projection on the mold table and the target position specified in the CAD drawing based on the real-time feedback from the S5 binocular camera;

[0023] S7: judging and switching between coarse adjustment and fine adjustment based on the error between the error calculated in step 6 and the threshold;

[0024] S8: The laser line is accurately projected to the center of the designated position, and the system maintains the projection state to assist workers in placing the mold or fixing the embedded parts.

[0025] S9: After completing the job, turn off the laser, exit the software, and shut down the device.

[0026] Furthermore, S1 includes:

[0027] S11: Setting a marking point or a marker with a known fixed length or known coordinates on the die table;

[0028] S12: Start the binocular camera, calibrate the binocular camera using the markers set above, and establish an accurate conversion relationship between the physical world coordinate system of the model platform and the image coordinate system of the binocular camera.

[0029] Furthermore, S2 includes:

[0030] S21: Importing the CAD drawing file of the prefabricated component through the control software;

[0031] S22: The control software analyzes the drawing data, extracts the coordinate information of the lines or points that need to be positioned on the mold platform, and converts it into motion instructions that can be recognized and executed by the laser projection device.

[0032] Furthermore, the error threshold in S3 should be set to be greater than the positioning accuracy adjusted by the rotation stage and smaller than the effective travel range of the translation stage.

[0033] Furthermore, if the calculated projection error in S7 is greater than the preset error threshold, the control software will continue to adjust the angle of the rotation stage, repeating S4 and S5, iteratively adjusting the rotation stage until the projection error is less than or equal to the error threshold. The rotation stage then stops moving and fixes the current angle, and the system enters the fine-tuning phase.

[0034] If the projection error is less than or equal to the error threshold, the rotation stage is locked. At this time, the control software activates the translation stage to perform high-precision compensation for the position of the laser line through precise linear displacement. At the same time, the binocular camera continuously feeds back the actual position until the error between the projection position and the target position meets the extremely small tolerance range required by the production process.

[0035] The present invention provides a high-precision prefabricated construction model stage laser projection positioning system and method, which can achieve coarse adjustment of projection accuracy by angle control in a wide range of scenarios, and can achieve fine adjustment of projection accuracy at low cost by translating the slide table. Therefore, by adopting the coarse adjustment + fine adjustment method, the equipment can be miniaturized, precise and cost-optimized. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The present invention is further described below with reference to the accompanying drawings and specific embodiments.

[0037] Figure 1 This is a schematic diagram of the laser projection positioning system for this high-precision prefabricated modeling platform;

[0038] Figure 2 This is a side view of the structure of the laser projection positioning system for the high-precision prefabricated mold platform;

[0039] Figure 3 This is a top view of the structure of the laser projection positioning system for the high-precision prefabricated mold platform;

[0040] Figure 4 This is a structural diagram of Example 2;

[0041] Figure 5 This is a flow chart of the positioning method for laser projection of a high-precision prefabricated mold platform.

[0042] The following is a description of the components in the accompanying drawings:

[0043] 1. Laser projection device 2. Rotation device 3. Translation device 31. Translation stage 32. Translation guide rail 4. Image acquisition device 5. Mold stage DETAILED DESCRIPTION

[0044] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below with reference to specific illustrations.

[0045] The existing mold platform laser projection positioning system has the technical effects of low precision, high cost and poor stability. Based on the technical problems existing in the existing technology, the present invention provides a high-precision prefabricated mold platform laser projection positioning system, which controls the coarse adjustment of the projection accuracy through angle control, and can achieve fine adjustment of the projection accuracy at low cost through the translation slide. Therefore, by adopting the coarse adjustment + fine adjustment method, the laser line can be accurately projected to any specified position of the prefabricated component mold platform, thereby effectively guiding the precise placement of the mold and the accurate positioning of the embedded parts, and realizing the miniaturization, precision and cost optimization of the equipment.

[0046] Embodiment 1:

[0047] The high-precision prefabricated modeling platform laser projection positioning system provided by the present invention is Figure 1 , which includes a laser projection device 1, a rotation device 2, a translation device 3, an image acquisition device 4 and a control device.

[0048] The laser projection device 1 is used to generate and project a laser line relative to the prefabricated component mold platform 5 to guide the precise placement of the mold and the accurate positioning of the embedded parts.

[0049] See also Figure 2-Figure 3 The rotating device 2 is connected to the laser projection device 1, and the laser projection device 1 is installed on the rotating device 2, which is used to control the rotation of the laser projection device 1 to adjust the projection angle of the laser projection device 1 to achieve large-scale coverage and preliminary positioning (coarse adjustment).

[0050] The rotating device 2 interacts with the control device through data. The control device can control the rotating device 2 to drive the laser projection device 1 to rotate or translate along the translation device 3 to adjust the projection accuracy of the laser projection device 1 .

[0051] The rotating device 2 and the laser projection device 1 are connected and integrally mounted on the translation device 3. The translation device 3 is used to support the rotating device 2 and the laser projection device 1 and can drive the rotating device 2 and the laser projection device 1 to translate relative to the prefabricated component mold platform 5. The translation device 3 includes a translation platform 31 and a translation guide rail 32.

[0052] The translation guide rail 32 is arranged on the translation stage 31, and the rotating device 2 and the laser projection device 1 are integrally arranged on the translation guide rail 32, and can move linearly along the translation guide rail 32 for precise fine-tuning (fine adjustment) of the laser projection device 1 within a small range.

[0053] The image acquisition device 4 is hung or installed above the working area of ​​the mold stage or at a suitable position, and is used to capture and identify the actual position of the laser line projected by the laser projection device 1 on the mold stage 5 in real time.

[0054] The image acquisition device 4 interacts with the control device to capture and identify the actual position of the laser line projected by the laser projection device 1 on the mold table 5 in real time and feed it back to the control device to ensure that the laser line is accurately projected to the specified position required by the drawing, ensuring projection stability, which is better than the DLP system.

[0055] The composition of the image acquisition device is not limited in this solution and can be determined according to actual conditions. For example, it can include at least one binocular camera, which can capture and identify the actual position of the laser line projected by the laser projection device on the mold table in real time and feed it back to the control device.

[0056] The control device is installed in a computer or a dedicated controller, and is used to realize projection control and precision control of the laser projection positioning system. The control device includes a first receiving unit, an analyzing unit, a second receiving unit, a calculating unit, a comparing unit, a first control unit, and a second control unit.

[0057] The first receiving unit is used to receive a CAD drawing file.

[0058] The parsing unit exchanges data with the first receiving unit, and is used to convert positioning information (such as lines and point coordinates) in the CAD drawing file received by the first receiving unit into projection instructions for the laser projection device 1 .

[0059] The second receiving unit exchanges data with the image acquisition device 4 and is used to receive the projection instruction converted by the analyzing unit and the feedback from the image acquisition device 4 .

[0060] The computing unit interacts with the second receiving unit to exchange data. Based on the image information fed back by the image acquisition device 4, the computing unit identifies the actual position coordinates of the laser line on the mold table 5 through the image processing method, performs closed-loop control, and calculates the projection error between the actual position coordinates and the preset calibration coordinates.

[0061] The comparison unit interacts with the calculation unit in data. The comparison unit is used to compare the projection error calculated by the calculation unit with a preset error threshold to switch between the first control unit and the second control unit.

[0062] The first control unit exchanges data with the rotating device 2. If the projection error is greater than a preset error threshold, the first control unit controls the rotating device of the laser projection device 1 to rotate for coarse adjustment according to the size of the error with the preset threshold.

[0063] The second control unit interacts with the rotating device 2 to exchange data. If the projection error is less than a preset error threshold, the second control unit controls the rotating device 2 to translate along the translation guide rail 32 for fine adjustment according to the size of the error with the preset threshold.

[0064] Example 2:

[0065] This embodiment is based on the first embodiment. According to the requirements of the drawings, multiple laser projection devices 1 can be set up. Multiple devices can flexibly project complex graphics and adapt to diversified production.

[0066] As an example, four laser projection devices 1 may be provided. Figure 4 As shown, one is set near each of the four sides of the rectangular outline, or two are set in groups to project parallel lines in orthogonal directions, which are used to simultaneously or sequentially project to form a rectangular outline or other complex graphics.

[0067] You can also mark the center point of the embedded part by projecting a cross line (such as Figure 4 (as shown in the "embedded parts center point (schematic)").

[0068] Example 3:

[0069] This embodiment is based on Embodiments 1 and 2, and an additional rotating mechanism (for example, another small rotating table) is added between the laser projection device 1 and the rotating device 2 or on the entire device of the laser projection device 1 and the rotating device 2 to achieve flexible adjustment of the angle of the projected laser line within the plane of the mold table, thereby being able to project a straight line at any angle and enhancing the adaptability of the system.

[0070] Based on the high-precision prefabricated model platform laser projection positioning system constructed by the above solution, this solution also provides a high-precision prefabricated model platform laser projection positioning method. The actual position coordinates of the laser projection are obtained through image feedback from the binocular camera, and the difference is calculated with the pre-calibrated position coordinates. The difference is compared with a preset error threshold to control the switching of coarse and fine adjustment of the laser projection. In this way, through the "coarse adjustment of the rotation stage + fine adjustment of the translation stage" combined with the closed-loop feedback of the binocular camera, high-precision laser projection is achieved, which is superior to DLP and simplifies the high-precision control of the galvanometer system.

[0071] Further, see Figure 5 The high-precision prefabricated construction model platform laser projection positioning method provided in this solution includes the following steps:

[0072] S1: System initialization and calibration

[0073] This step is used to start the control software, calibrate the binocular camera using the calibration points or calibration plate on the mold stage, and establish the coordinate system mapping.

[0074] S11: Setting a marking point or a marker with a known fixed length or known coordinates on the mold table.

[0075] S12: Start the binocular camera, calibrate the binocular camera using the markers set above, and establish an accurate conversion relationship between the physical world coordinate system of the model platform and the image coordinate system of the binocular camera.

[0076] S2: Data input and processing

[0077] This step is used to import the CAD drawing file into the control software and parse the coordinate information of the drawing and convert it into projection instructions.

[0078] S21: Import the CAD drawing file of the prefabricated component through the control software.

[0079] S22: The control software analyzes the drawing data, extracts the coordinate information of the lines or points that need to be positioned on the mold platform, and converts it into motion instructions that can be recognized and executed by the laser projection device.

[0080] S3: Setting the error threshold according to the projection equipment parameters

[0081] This step is used to set an error switching threshold δ in the control software. This error threshold δ should be set to a value greater than the positioning accuracy of the rotary stage and less than the effective travel range of the translation stage to distinguish between the coarse and fine adjustment stages.

[0082] S4: Laser projection and preliminary positioning (coarse adjustment)

[0083] Following the instructions converted from S2, the control software first rotates the laser projection system's rotating stage. The laser beam, after being angled by the rotating stage, is projected onto the mold platform. The rotating stage's purpose is to quickly direct the laser beam to an area adjacent to the target location over a wide area.

[0084] S5: Visual feedback and error detection:

[0085] A binocular camera captures the laser projection on the mold platform in real time. Using image processing algorithms, the camera accurately identifies the actual position coordinates of the laser line on the mold platform. This position information is fed back to the control software.

[0086] S6: Error calculation and precise positioning

[0087] This step calculates the error between the actual position coordinates of the laser projection on the mold stage fed back in real time by the S5 binocular camera and the target position specified in the CAD drawing.

[0088] S7: Judgment and Switching

[0089] This step determines the size of the error between the error calculated in step 6 and the threshold and switches between coarse adjustment and fine adjustment.

[0090] Specifically, if the calculated projection error is greater than the preset error threshold δ, the control software will continue to adjust the angle of the turntable, repeat S4 and S5, and iteratively adjust the turntable until the projection error is less than or equal to δ. The turntable then stops moving and fixes the current angle, and the system enters the fine-tuning stage.

[0091] When the projection error is less than or equal to δ, the rotation stage is locked. At this point, the control software activates the translation stage for fine-tuning. The translation stage uses precise linear displacement to accurately compensate for the laser line's position. Simultaneously, the binocular camera continuously provides feedback on the actual position until the error between the projected and target positions meets the extremely tight tolerances required by the production process.

[0092] S8: Positioning completion and operation guidance:

[0093] Once the laser line is accurately projected to the specified position (for example, to mark the edge of the mold or the center of the embedded part, such as Figure 1 When the laser is projected onto the edge of the "mold, etc.", the system maintains the projection state, providing clear and accurate visual guidance for on-site workers to assist them in placing the mold or fixing the embedded parts.

[0094] S9 ends the job and shuts down the system

[0095] When the job is complete, turn off the laser, exit the software, and shut down the device.

[0096] The aforementioned methods, or specific system units, or portions thereof, of the present invention are purely software-based and can be implemented as program code on physical media, such as a hard drive, optical disk, or any electronic device (e.g., a smartphone or computer-readable storage medium). When a machine loads and executes the program code (e.g., a smartphone), the machine becomes a device for implementing the present invention. The aforementioned methods and devices of the present invention can also be transmitted in program code form via some transmission medium, such as a cable, optical fiber, or any other transmission method. When the program code is received, loaded, and executed by a machine (e.g., a smartphone), the machine becomes a device for implementing the present invention.

[0097] The high-precision prefabricated construction model platform laser projection positioning system and method composed of the above scheme can bring the following technical effects:

[0098] High-precision positioning: "Rotation stage coarse adjustment + translation stage fine adjustment" combined with binocular camera closed-loop feedback achieves high-precision laser projection, which is superior to DLP and simplifies the high-precision control of the galvanometer system.

[0099] Cost optimization: The "coarse and fine combination" design reduces the overall accuracy requirements for moving parts, significantly reducing system manufacturing and maintenance costs.

[0100] Equipment miniaturization and integration: The short fine-tuning stroke makes the laser projection device compact and easy to integrate and deploy on the production line.

[0101] Strong adaptability and wide coverage: The rotary table expands the coverage of a single device; multiple devices or the addition of a rotary mechanism can flexibly project complex graphics and adapt to diversified production.

[0102] Improve production efficiency and quality: Precise laser guidance replaces manual marking to improve efficiency; high-precision positioning ensures the accuracy of product dimensions and embedded parts, improving quality.

[0103] Easy operation and high degree of automation: CAD direct reading and automatic projection control, combined with binocular camera automatic feedback, improve automation and reduce operation difficulty.

[0104] Good anti-disturbance performance: The real-time visual feedback of the binocular camera can compensate for environmental disturbances and ensure projection stability, which is better than the DLP system.

[0105] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-precision laser projection positioning system for prefabricated building mold platforms, comprising a laser projection device and an image acquisition device, the image acquisition device being suspended or mounted above or at a suitable location within the mold platform's working area and used to capture and identify in real time the actual position of a laser line projected by the laser projection device onto the mold platform. The system is characterized in that: It also includes a rotating device, a translation device and a control device. The rotating device is connected to the laser projection device and is used to control the laser projection device to rotate so as to adjust the projection angle of the laser projection device for coarse position adjustment. After the rotating device is connected to the laser projection device, it is integrally arranged on the translation device. The rotating device and the laser projection device can be translated along the translation device for fine position adjustment. The control device interacts with the image acquisition device, the rotating device and the translation device for data respectively, and is used to realize projection control and precision control of the laser projection positioning system.

2. A high-precision prefabricated building mold platform laser projection positioning system according to claim 1, characterized in that: The translation device includes a translation platform and a translation guide rail. The translation guide rail is arranged on the translation platform. The rotation device and the laser projection device are integrally arranged on the translation guide rail and can move linearly along the translation guide rail.

3. The high-precision prefabricated building mold platform laser projection positioning system according to claim 1, characterized in that: The control device includes a first receiving unit, an analyzing unit, a second receiving unit, a calculating unit, a comparing unit, a first control unit and a second control unit; The first receiving unit is used to receive a CAD drawing file; The parsing unit interacts with the first receiving unit to convert the positioning information in the CAD drawing file received by the first receiving unit into a projection instruction of the laser projection device; The second receiving unit interacts with the image acquisition device to receive the projection instruction converted by the analyzing unit and the feedback from the image acquisition device; The computing unit interacts with the second receiving unit to identify the actual position coordinates of the laser line on the mold platform based on the image information fed back by the image acquisition device, and calculates the projection error between the actual position coordinates and the preset calibration coordinates; The comparison unit interacts with the calculation unit data, and the comparison unit is used to compare the projection error calculated by the calculation unit with a preset error threshold to switch between the first control unit and the second control unit; The first control unit interacts with the rotation device data, and if the projection error is greater than a preset error threshold, the first control unit controls the rotation device of the laser projection device to rotate for coarse adjustment according to the size of the error with the preset threshold; The second control unit interacts with the rotation device data. If the projection error is less than a preset error threshold, the second control unit controls the rotation device to translate along the translation stage for fine adjustment according to the error size with the preset threshold.

4. The high-precision prefabricated building mold platform laser projection positioning system according to claim 1, characterized in that: The laser projection device includes at least one laser projection component.

5. A high-precision prefabricated build mold platform laser projection positioning method, the high-precision prefabricated build mold platform laser projection positioning method is implemented in conjunction with the high-precision prefabricated build mold platform laser projection positioning system described in claims 1-4, characterized in that: The positioning method of the high-precision prefabricated building model stage laser projection comprises the following steps: S1: Start the control software, calibrate the binocular camera using the calibration points or calibration plate on the mold stage, and establish a coordinate system mapping; S2: Import the CAD drawing file into the control software and analyze the coordinate information of the drawing and convert it into projection instructions; S3: Setting an error switching threshold in the control software according to the projection device parameters; S4: According to the instructions converted in S2, the rotating table in the laser projection device is controlled to rotate, and the laser beam emitted by the laser is projected onto the mold table after the angle of the rotating table is adjusted; S5: The binocular camera captures the laser projection on the mold platform in real time. Through the image processing algorithm, it can accurately identify the actual position coordinates of the laser line on the mold platform and feed back to the control software; S6: Calculate the error between the actual position coordinates of the laser projection on the mold table and the target position specified in the CAD drawing based on the real-time feedback from the S5 binocular camera; S7: judging and switching between coarse adjustment and fine adjustment based on the error between the error calculated in step 6 and the threshold; S8: The laser line is accurately projected to the center of the designated position, and the system maintains the projection state to assist workers in placing the mold or fixing the embedded parts. S9: After completing the job, turn off the laser, exit the software, and shut down the device.

6. The high-precision prefabricated construction model platform laser projection positioning method according to claim 5, characterized in that: S1 includes: S11: Setting a marking point or a marker with a known fixed length or known coordinates on the die table; S12: Start the binocular camera, calibrate the binocular camera using the markers set above, and establish an accurate conversion relationship between the physical world coordinate system of the model platform and the image coordinate system of the binocular camera.

7. The method for positioning a high-precision prefabricated building block by laser projection according to claim 5, wherein S2 include: S21: Importing the CAD drawing file of the prefabricated component through the control software; S22: The control software analyzes the drawing data, extracts the coordinate information of the lines or points that need to be positioned on the mold platform, and converts it into motion instructions that can be recognized and executed by the laser projection device.

8. The high-precision prefabricated building block laser projection positioning method according to claim 5, characterized in that: The error threshold setting in S3 should be greater than the positioning accuracy adjusted by the rotation stage and smaller than the effective travel range of the translation stage.

9. The high-precision prefabricated building block laser projection positioning method according to claim 5, characterized in that: If the calculated projection error in S7 is greater than the preset error threshold, the control software will continue to adjust the angle of the rotation stage, repeating S4 and S5, iteratively adjusting the rotation stage until the projection error is less than or equal to the error threshold. The rotation stage then stops moving and fixes the current angle, and the system enters the fine-tuning phase. If the projection error is less than or equal to the error threshold, the rotation stage is locked. At this time, the control software activates the translation stage to perform high-precision compensation for the position of the laser line through precise linear displacement. At the same time, the binocular camera continuously feeds back the actual position until the error between the projection position and the target position meets the extremely small tolerance range required by the production process.

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