Steel structure pre-assembly system based on digital acquisition system and construction simulation method

Abstract

The invention belongs to the field of steel structure pre-assembly, and particularly relates to a steel structure pre-assembly system based on a digital acquisition system and a construction simulation method.The steel structure pre-assembly system comprises a three-dimensional scanner, a steel structure entity, data processing equipment, a steel structure three-dimensional model, a computer and a feedback terminal; the three-dimensional scanner is in wireless or wired connection with the data processing equipment, the data processing equipment is in wireless or wired connection with the computer, and the computer is in wireless connection with the feedback terminal; a model of a steel structure entity is subjected to digital reconstruction in a manner of integrating data of overall multiple scanning and local high-precision scanning through data processing equipment, so that the precision and accuracy of the reconstructed entity three-dimensional model can be effectively improved, and the accuracy during simulated assembly is further effectively improved; steel structure three-dimensional model data during design are compared with an entity three-dimensional model by using a BIM technology on a computer, so that the parameter difference between a steel structure entity and the design can be conveniently judged.

Description

Technical Field

[0001] The present invention relates to the field of steel structure pre-assembly, and in particular to a steel structure pre-assembly system and a construction simulation method based on a digital acquisition system. Background Art

[0002] Steel structure pre-assembly is the process of temporarily assembling completed components in the factory according to the design drawings, simulating the on-site installation status to verify dimensional accuracy, node fit and overall quality. Traditional technology requires a lot of manpower and material resources to pre-assemble steel structures. In order to reduce the time and cost consumed by steel structure pre-assembly, digital pre-assembly technology has emerged. By digitally scanning the steel structure to obtain a steel structure model, simulated assembly of the steel structure model can effectively save labor costs and the time consumed by actual pre-assembly.

[0003] The steel structure pre-assembly system based on the digital acquisition system can be specifically referred to the Chinese invention patent with publication number CN119205500A, which discloses in detail a digital simulation pre-assembly method and system for steel structures, including: obtaining models of several components in the steel structure pre-assembly process through point cloud scanning; obtaining the initial neighborhood of each point for several points in the model of the same component, and obtaining several neighborhood smoothing angles of each point; expanding the initial neighborhood of each point and obtaining the terminal neighborhood of each point; obtaining a complete segmentation evaluation of each point; segmenting the model to obtain several edges to be matched in the model; obtaining the edge distribution array and matching edge array in the two models; obtaining the interface fit evaluation between the two models; constructing a splicing graph structure through threshold judgment; and obtaining the assembly order of components in the steel structure. The present invention aims to solve the problem that the smooth position of the surface of some structural parts produces multiple successful matching positions, which affects the matching accuracy and thus affects the assembly progress.

[0004] When scanning and reconstructing steel structures, the existing technology only scans the entire steel structure through the long-range lens of the three-dimensional scanner, which has poor scanning accuracy. As a result, the reconstructed three-dimensional steel structure model has large deviations, and the results obtained during simulated assembly will be significantly different from the actual assembly. Therefore, to address the above problems, a steel structure pre-assembly system and a construction simulation method based on a digital acquisition system are proposed. Summary of the Invention

[0005] In order to solve the problem that the existing technology only scans the entire steel structure through the long-distance lens of the three-dimensional scanner when scanning and reconstructing the steel structure, resulting in poor scanning accuracy, which in turn leads to large deviations in the reconstructed three-dimensional steel structure model, and a large gap between the results obtained during simulated assembly and the actual assembly, the present invention proposes a steel structure pre-assembly system and a construction simulation method based on a digital acquisition system.

[0006] The technical solution adopted by the present invention to solve the technical problem is as follows: the steel structure pre-assembly system and construction simulation method based on the digital acquisition system of the present invention include a three-dimensional scanner, a steel structure entity, a data processing device, a three-dimensional model of the steel structure, a computer and a feedback terminal; the three-dimensional scanner is connected to the data processing device via a wireless or wired connection, the data processing device is connected to the computer via a wireless or wired connection, and the computer is wirelessly connected to the feedback terminal;

[0007] The 3D scanner is used to scan the 3D point cloud data of the steel structure entity, and transmit the data to the data processing equipment through a wireless or wired connection. The data processing equipment digitally reconstructs the steel structure entity through the 3D point cloud data scanned by the 3D scanner to obtain a solid 3D model, and transmits the solid 3D model to the computer through a wireless or wired connection. The computer compares the 3D model data of the steel structure during design with the solid 3D model through BIM technology to obtain the deviation result between the 3D model data of the steel structure and the solid 3D model, simulates the assembly of the solid 3D model to obtain the assembly result, and transmits the deviation result and the assembly result to the feedback terminal through a wireless connection.

[0008] Preferably, the three-dimensional scanner includes a lower body and an upper body, the top of the lower body is provided with an upper body, the bottom end of the lower body is electrically connected to the upper body through contacts, a lens compartment is provided on the rear side of the upper body near the left and right sides, a short-distance lens is fixedly connected to the interior of the lens compartment, a storage groove is provided on one side of the inner wall of the lens compartment, a protective baffle is inserted into the interior of the storage groove, an abutment groove is provided at the bottom end of the protective baffle, a push block is inserted into the interior of the abutment groove, the push block is fixedly connected to the top of the lower body, the top of the protective baffle is fixedly connected to a sliding block, the sliding block is slidably connected to the outside of the guide rod, the guide rod is fixedly connected to the top of the inner wall of the lens compartment, a first spring is provided on the outside of the guide rod, and a fixing component is provided on one side of the storage groove.

[0009] Preferably, a side of the first spring close to the sliding block is fixedly connected to the sliding block, and a side of the first spring away from the sliding block is fixedly connected to the inner wall of the lens chamber.

[0010] Preferably, the fixing assembly includes a fixing block, the side of the fixing block close to the protective baffle abuts against the protective baffle, the fixing block is inserted into the inside of the movable cavity, the movable cavity is opened on the inner wall of the lens chamber, the side of the fixing block away from the protective baffle is engaged with the fixing groove, the fixing groove is opened on one side of the plug-in block, the bottom end of the plug-in block is fixedly connected to the top end of the lower body, and the plug-in block is inserted into the inside of the slot, the slot is opened at the bottom end of the lower body, a pop-up assembly is provided at the top of the plug-in block, and a release assembly is provided on the movable cavity.

[0011] Preferably, the pop-up assembly includes a movable groove, which is opened at the top of the insertion block, a second spring is provided inside the movable groove, and a movable block is inserted inside the movable groove, the top of the movable block is fixedly connected to a top plate, and the top of the top plate abuts against the top of the inner wall of the slot.

[0012] Preferably, the top end of the second spring is fixedly connected to the bottom end of the movable block, and the bottom end of the second spring is fixedly connected to the inner wall of the movable groove, and a first slider is fixedly connected to the inner wall of the movable groove, and the first slider is slidably connected to the inside of the first slide groove, and the first slide groove is opened on one side of the movable block.

[0013] Preferably, the release component includes a second slide groove, the second slide groove is opened on the fixed block, a slide rail is fixedly connected to the inner wall of the second slide groove, a second slider is slidably connected to the outer side of the slide rail, the second slider is fixedly connected to the connecting plate, a third spring is provided on the outer side of the slide rail, the connecting plate is inserted into the inside of the active cavity, and the second slide groove is sleeved on the outer side of the guide column, the guide column is fixedly connected to the inner wall of the active cavity, and a fourth spring is provided on the outer side of the guide column, a push plate is fixedly connected to the side of the connecting plate away from the second slider, and a fixed baffle is fixedly connected to the inner wall of the lens chamber.

[0014] Preferably, the side of the third spring close to the second slider is fixedly connected to the second slider, the side of the third spring away from the second slider is fixedly connected to the inner wall of the second slide groove, the end of the fourth spring close to the connecting plate is fixedly connected to the connecting plate, and the side of the fourth spring away from the connecting plate is fixedly connected to the inner wall of the movable cavity, the side of the fixed baffle close to the upper body is fixedly connected to the third slider, the third slider is slidably connected to the inside of the third slide groove, and the third slide groove is opened on the outside of the upper body.

[0015] Preferably, a first magnetic block is fixedly connected to one side of the protective baffle close to the fixed block, the first magnetic block is attracted to the second magnetic block, and the second magnetic block is fixedly connected to the inner wall of the lens compartment.

[0016] Preferably, the steel structure pre-assembly construction simulation method based on the digital acquisition system comprises the following steps:

[0017] S1: Calibrate the 3D scanner using a calibration device;

[0018] S2: Place the 3D scanner on a tripod and use a long-distance lens to scan the entire steel structure entity;

[0019] S3: The connection between the upper body and the lower body is released by releasing the assembly, and the lower body is removed. When the lower body is removed, the protective baffle is simultaneously released to protect the short-distance lens. The lower body is held and a partial scan of the steel structure entity is performed through the short-distance lens. After the scan is completed, the lower body is reinstalled.

[0020] S4: The data processing equipment processes the 3D point cloud data obtained by the 3D scanner, reconstructs the solid 3D model based on the results of multiple scans, and transmits the solid 3D model to the computer;

[0021] S5: The computer compares the solid three-dimensional model with the steel structure three-dimensional model data to obtain a deviation result; simulates the assembly of the solid three-dimensional model to obtain an assembly result, and transmits the deviation result and the assembly result to the feedback terminal via a wireless connection.

[0022] The present invention is beneficial in that:

[0023] 1. The present invention digitally reconstructs the model of the steel structure entity by integrating the data from multiple overall scans and local high-precision scans using data processing equipment, which can effectively improve the precision and accuracy of the reconstructed entity 3D model, thereby effectively improving the accuracy during simulated assembly. By using BIM technology on a computer to compare the 3D model data of the steel structure during design with the 3D model of the entity, the difference in parameters between the steel structure entity and the design can be easily determined. By comparing it with the pre-assembly results, the location of the problem in the steel structure entity and the problem can be effectively determined, thereby facilitating the adjustment of the steel structure.

[0024] 2. The present invention utilizes a split lower and upper body design, enabling both the convenient and rapid use of a long-distance lens for scanning the entire steel structure, and the removal of the lower body for scanning complex local structures using a high-precision short-distance lens. This solves the problem of existing 3D scanning devices that use only a single long-distance lens to scan the entire steel structure, resulting in significant deviations in the 3D point cloud data. This approach maintains the efficiency of the long-distance lens while leveraging the precision of the short-distance lens, significantly improving the accuracy of the 3D point cloud data.

[0025] 3. This invention utilizes a release assembly design to quickly disconnect the lower and upper bodies. Once disconnected, the protective baffle automatically opens during the upward removal of the lower body, eliminating the need for manual operation and facilitating scanning of the steel structure. When the lower body is reinstalled on top of the upper body, the baffle automatically closes, protecting the short-range lens within the lens compartment and preventing damage when not in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 Schematic diagram of the system architecture of the present invention;

[0028] Figure 2 This is a schematic diagram of the overall front-view structure of the three-dimensional scanner of the present invention;

[0029] Figure 3 This is a schematic diagram of the overall three-dimensional structure of the three-dimensional scanner of the present invention from a rear view perspective;

[0030] Figure 4 It is a schematic diagram of the rear cross-sectional structure of the three-dimensional scanner of the present invention;

[0031] Figure 5 For the present invention Figure 4 A in the middle is an enlarged structural diagram;

[0032] Figure 6 For the present invention Figure 4 The enlarged structural diagram at B in the middle;

[0033] Figure 7 For the present invention Figure 4 The enlarged structural diagram at C in the middle;

[0034] Figure 8 It is a schematic diagram of a top-down cross-sectional three-dimensional structure of the three-dimensional scanner of the present invention;

[0035] Figure 9 For the present invention Figure 8 The enlarged structural diagram at D in the middle;

[0036] Figure 10 Schematic diagram of the method of the present invention.

[0037] In the figure: 1. lower body; 2. upper body; 21. lens compartment; 22. storage slot; 23. protective baffle; 24. abutment slot; 25. push block; 26. sliding block; 27. guide rod; 28. first spring; 29. fixed block; 30. movable cavity; 31. fixed slot; 32. insert block; 33. slot; 34. movable slot; 35. second spring; 36. movable block; 37. top plate; 38. first slider; 39. first slide groove; 40. second slide groove; 41. slide rail; 42. second slider; 43. third spring; 44. connecting plate; 45. guide column; 46. fourth spring; 47. push plate; 48. third slider; 49. third slide groove; 50. first magnetic block; 51. second magnetic block; 52. fixed baffle. DETAILED DESCRIPTION

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0039] Example

[0040] See also Figures 1-10 As shown, a steel structure pre-assembly system and a construction simulation method based on a digital acquisition system include a 3D scanner, a steel structure entity, a data processing device, a 3D model of the steel structure, a computer, and a feedback terminal; the 3D scanner is connected to the data processing device via a wireless or wired connection, the data processing device is connected to the computer via a wireless or wired connection, and the computer is wirelessly connected to the feedback terminal;

[0041] The 3D scanner is used to scan the 3D point cloud data of the steel structure entity, and transmit the data to the data processing equipment through wireless or wired connection. The data processing equipment digitally reconstructs the steel structure entity through the 3D point cloud data scanned by the 3D scanner to obtain a solid 3D model, and transmits the solid 3D model to the computer through wireless or wired connection. The computer uses BIM technology to compare the 3D model data of the steel structure during design with the solid 3D model, obtains the deviation result between the 3D model data of the steel structure and the solid 3D model, simulates the assembly of the solid 3D model to obtain the assembly result, and transmits the deviation result and the assembly result to the feedback terminal through wireless connection.

[0042] Furthermore, the three-dimensional scanner includes a lower body 1 and an upper body 2. The upper body 2 is provided at the top of the lower body 1. The bottom end of the lower body 1 is electrically connected to the upper body 2 through contacts. A lens compartment 21 is provided at the rear side of the upper body 2 near the left and right sides. A short-distance lens is fixedly connected to the interior of the lens compartment 21. A storage groove 22 is provided on one side of the inner wall of the lens compartment 21. A protective baffle 23 is inserted into the interior of the storage groove 22. An abutment groove 24 is provided at the bottom end of the protective baffle 23. A push block 25 is inserted into the interior of the abutment groove 24. The pushing block 25 is fixedly connected to the top of the lower body 1, and the top of the protective baffle 23 is fixedly connected to the sliding block 26. The sliding block 26 is slidably connected to the outside of the guide rod 27, and the guide rod 27 is fixedly connected to the top of the inner wall of the lens chamber 21. A first spring 28 is provided on the outside of the guide rod 27, and a fixing component is provided on one side of the storage groove 22. The side of the first spring 28 close to the sliding block 26 is fixedly connected to the sliding block 26, and the side of the first spring 28 away from the sliding block 26 is fixedly connected to the inner wall of the lens chamber 21.

[0043] The fixing assembly includes a fixing block 29, the side of the fixing block 29 close to the protective baffle 23 abuts against the protective baffle 23, the fixing block 29 is inserted into the inside of the movable cavity 30, the movable cavity 30 is opened on the inner wall of the lens chamber 21, the side of the fixing block 29 away from the protective baffle 23 is engaged with the fixing groove 31, the fixing groove 31 is opened on one side of the insert block 32, the bottom end of the insert block 32 is fixedly connected to the top of the lower body 1, and the insert block 32 is inserted into the inside of the slot 33, the slot 33 is opened at the bottom end of the lower body 1, a pop-up assembly is provided at the top of the insert block 32, and a release assembly is provided on the movable cavity 30.

[0044] The pop-up assembly includes a movable groove 34, which is opened at the top of the insertion block 32. A second spring 35 is provided inside the movable groove 34, and a movable block 36 is inserted inside the movable groove 34. The top of the movable block 36 is fixedly connected to a top plate 37, and the top of the top plate 37 abuts against the top of the inner wall of the slot 33. The top of the second spring 35 is fixedly connected to the bottom end of the movable block 36, and the bottom end of the second spring 35 is fixedly connected to the inner wall of the movable groove 34. A first slider 38 is fixedly connected to the inner wall of the movable groove 34, and the first slider 38 is slidably connected to the inside of the first slide groove 39. The first slide groove 39 is opened on one side of the movable block 36.

[0045] The release assembly includes a second slide groove 40, which is opened on the fixed block 29, and a slide rail 41 is fixedly connected to the inner wall of the second slide groove 40. A second slider 42 is slidably connected to the outer side of the slide rail 41, and the second slider 42 is fixedly connected to the connecting plate 44. A third spring 43 is provided on the outer side of the slide rail 41, and the connecting plate 44 is inserted into the interior of the active cavity 30. The second slide groove 40 is sleeved on the outer side of the guide column 45, and the guide column 45 is fixedly connected to the inner wall of the active cavity 30. A fourth spring 46 is provided on the outer side of the guide column 45, and a push plate 47 is fixedly connected to the side of the connecting plate 44 away from the second slider 42. A fixed baffle 52 is fixedly connected to the inner wall of the lens chamber 21, and the third spring 43 is close to the second slider 4 2 is fixedly connected to the second slider 42, the side of the third spring 43 away from the second slider 42 is fixedly connected to the inner wall of the second slide groove 40, one end of the fourth spring 46 close to the connecting plate 44 is fixedly connected to the connecting plate 44, and the side of the fourth spring 46 away from the connecting plate 44 is fixedly connected to the inner wall of the active cavity 30, the side of the fixed baffle 52 close to the upper body 2 is fixedly connected to the third slider 48, the third slider 48 is slidably connected to the inside of the third slide groove 49, and the third slide groove 49 is opened on the outside of the upper body 2, and the side of the protective baffle 23 close to the fixed block 29 is fixedly connected to the first magnetic block 50, the first magnetic block 50 is attracted to the second magnetic block 51, and the second magnetic block 51 is fixedly connected to the inner wall of the lens chamber 21.

[0046] During operation, when the lower body 1 is to be removed and the steel structure entity is to be scanned using a short-distance lens, the push plate 47 is first pushed to move, so that the push plate 47 drives the fixedly connected connecting plate 44 to move synchronously within the movable cavity 30, causing the connecting plate 44 to squeeze the fourth spring 46, causing the fourth spring 46 to produce elastic deformation. When the connecting plate 44 moves, it drives the fixed block 29 to move synchronously into the movable cavity 30 through the second slider 42 and the slide rail 41. At this time, the fixed block 29 releases the engagement with the fixed groove 31, and the upper body 2 is no longer fixed. The second spring 35 in the movable groove 34 is in a compressed state, which pushes the movable block 36 upward, causing the movable block 36 and the top plate 37 to move upward, thereby synchronously pushing the upper body 2 upward. When the upper body 2 moves upward, the protective baffle 23 is also driven to move upward synchronously. At this time, the abutment groove 24 opened at the bottom end of the protective baffle 23 gradually separates from the push block 25 as the upper body 2 moves upward, thereby releasing the accumulated elastic potential energy of the first spring 28 in the compressed state, pushing the sliding block 26 to move on the outside of the guide rod 27, and driving the fixedly connected protective baffle 23 to move synchronously, so that the protective baffle 23 gradually enters the interior of the storage groove 22 to contact the short-range lens inside the lens chamber 21. The upper body 2 can be removed by the handle at the top of the upper body 2 to scan a part of the steel structure entity.

[0047] After releasing the push plate 47, the connecting plate 44 returns to its original position under the restoring force of the fourth spring 46, driving the push plate 47 and the fixed block 29 to move to their original positions. After the fixed block 29 moves to its original position, the protective baffle 23 has completely entered the interior of the storage slot 22, and the fixed block 29 is no longer squeezed by the protective baffle 23. At this time, the elastic potential energy accumulated by the third spring 43 is released to push the fixed block 29 to move, so that the fixed block 29 is partially inserted into the interior of the lens housing 21. The inserted portion of the fixed block 29 is small and does not block the scanning range of the short-range lens.

[0048] When the push plate 47 moves, the third slider 48 fixedly connected to the push plate 47 moves synchronously inside the third slide groove 49. The structural design of the combination of the push plate 47 and the third slider 48 has the effect of guiding the movement of the push plate 47, making it convenient to push the push plate 47 to move.

[0049] When the movable block 36 moves, it drives the fixedly connected first slider 38 to slide synchronously inside the first slide groove 39. The structural design of the combination of the first slider 38 and the first slide groove 39 has the effect of limiting the moving distance of the movable block 36, thereby preventing the movable block 36 from moving excessively and escaping from the inside of the movable groove 34 under the action of the restoring force of the second spring 35.

[0050] To reattach the upper body 2 to the top of the lower body 1, first align the slot 33 defined at the bottom of the upper body 2 with the insert block 32. Then, press the upper body 2 downward, causing it to move downward under the pressure, inserting the top plate 37 into the slot 33. As the upper body 2 continues to descend, the top of the slot 33 pushes the top plate 37 and the movable block 36 downward, causing the movable block 36 to gradually enter the movable groove 34, squeezing the second spring 35 and causing it to elastically deform and accumulate elastic potential energy. The insert block 32 gradually inserts into the slot 33. Simultaneously, the push block 25, fixed to the top of the lower body 1, simultaneously inserts into the abutment groove 24. Through the geometrical interaction between the abutment groove 24 and the push block 25, the protective baffle 23 is pushed toward the interior of the lens chamber 21, shielding and protecting the short-range lens within. When the protective baffle 23 moves toward the interior of the lens housing 21, it pushes the fixed block 29 to move. The fixed block 29 moves toward the fixing slot 31 and inserts into the fixing slot 31, thereby connecting the lower body 1 and the upper body 2. When the fixed block 29 is pushed and moved by the protective baffle 23, the second slider 42 slides within the second slide slot 40 and compresses the third spring 43, causing the third spring 43 to elastically deform and accumulate elastic potential energy. When the upper body 2 moves downward to its limit, the protective baffle 23 also moves to its limit. At this time, the third slide slot 49 fixed to the protective baffle 23 engages with the first magnet 50, fixing the position of the protective baffle 23 and preventing the protective baffle 23 from being incompletely closed due to collision or other external forces.

[0051] Furthermore, a steel structure pre-assembly construction simulation method based on a digital acquisition system comprises the following steps:

[0052] S1: Calibrate the 3D scanner using a calibration device;

[0053] S2: Place the 3D scanner on a tripod and use a long-distance lens to scan the entire steel structure entity;

[0054] S3: The connection between the upper body 2 and the lower body 1 is released by releasing the assembly, and the lower body 1 is removed. When the lower body 1 is removed, the protective baffle 23 simultaneously releases the protection of the short-distance lens. The lower body 1 is held and scanned through the short-distance lens to partially scan the steel structure entity. After the scan is completed, the lower body 1 is reinstalled.

[0055] S4: The data processing equipment processes the 3D point cloud data obtained by the 3D scanner, reconstructs the solid 3D model based on the results of multiple scans, and transmits the solid 3D model to the computer;

[0056] S5: The computer compares the solid three-dimensional model with the steel structure three-dimensional model data to obtain a deviation result; simulates the assembly of the solid three-dimensional model to obtain an assembly result, and transmits the deviation result and the assembly result to the feedback terminal via a wireless connection.

[0057] 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 above embodiments. The above 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, and such changes and modifications fall within the scope of the invention as claimed.

Claims

1. The steel structure pre-assembly system based on the digital acquisition system is characterized by: It includes a three-dimensional scanner, a steel structure entity, a data processing device, a three-dimensional model of the steel structure, a computer and a feedback terminal; the three-dimensional scanner is connected to the data processing device via wireless or wired connection, the data processing device is connected to the computer via wireless or wired connection, and the computer is wirelessly connected to the feedback terminal; The 3D scanner is used to scan 3D point cloud data of a steel structure entity, and transmit the data to a data processing device via a wireless or wired connection. The data processing device digitally reconstructs the steel structure entity using the 3D point cloud data scanned by the 3D scanner to obtain a solid 3D model, and transmits the solid 3D model to a computer via a wireless or wired connection. The computer compares the 3D model data of the steel structure during design with the solid 3D model using BIM technology to obtain a deviation result between the 3D model data of the steel structure and the solid 3D model, simulates and assembles the solid 3D model to obtain an assembly result, and transmits the deviation result and the assembly result to a feedback terminal via a wireless connection; The three-dimensional scanner comprises a lower body (1) and an upper body (2), wherein the upper body (2) is provided at the top of the lower body (1), and the bottom end of the lower body (1) is electrically connected to the upper body (2) through contacts, and a lens chamber (21) is provided at the rear side of the upper body (2) near the left and right sides, and a short-distance lens is fixedly connected inside the lens chamber (21), and a storage groove (22) is provided on one side of the inner wall of the lens chamber (21), and a protective baffle (23) is inserted inside the storage groove (22), and an abutting groove (24) is provided at the bottom end of the protective baffle (23), and a push block (25) is inserted inside the abutting groove (24), and the push block (25) is fixedly connected to the top of the lower body (1).

2. The steel structure pre-assembly system based on the digital acquisition system according to claim 1, characterized in that: The top end of the protective baffle (23) is fixedly connected to a sliding block (26), the sliding block (26) is slidably connected to the outside of a guide rod (27), the guide rod (27) is fixedly connected to the top end of the inner wall of the lens chamber (21), a first spring (28) is provided on the outside of the guide rod (27), and a fixing component is provided on one side of the receiving groove (22).

3. The steel structure pre-assembly system based on the digital acquisition system according to claim 2, characterized in that: The side of the first spring (28) close to the sliding block (26) is fixedly connected to the sliding block (26), and the side of the first spring (28) away from the sliding block (26) is fixedly connected to the inner wall of the lens chamber (21).

4. The steel structure pre-assembly system based on the digital acquisition system according to claim 2, characterized in that: The fixing assembly comprises a fixing block (29), wherein a side of the fixing block (29) close to the protective baffle (23) abuts against the protective baffle (23), the fixing block (29) is inserted into the interior of the movable cavity (30), the movable cavity (30) is provided on the inner wall of the lens chamber (21), the side of the fixing block (29) away from the protective baffle (23) is engaged with the fixing slot (31), the fixing slot (31) is provided on one side of the inserting block (32), the bottom end of the inserting block (32) is fixedly connected to the top end of the lower body (1), and the inserting block (32) is inserted into the interior of the slot (33), the slot (33) is provided at the bottom end of the lower body (1), the top end of the inserting block (32) is provided with a pop-up assembly, and the movable cavity (30) is provided with a release assembly.

5. The steel structure pre-assembly system based on the digital acquisition system according to claim 4 is characterized in that: The pop-up assembly includes a movable groove (34), the movable groove (34) is opened at the top of the insert block (32), a second spring (35) is provided inside the movable groove (34), and a movable block (36) is inserted inside the movable groove (34), the top of the movable block (36) is fixedly connected to a top plate (37), and the top of the top plate (37) abuts against the top of the inner wall of the slot (33).

6. The steel structure pre-assembly system based on the digital acquisition system according to claim 5, characterized in that: The top end of the second spring (35) is fixedly connected to the bottom end of the movable block (36), and the bottom end of the second spring (35) is fixedly connected to the inner wall of the movable groove (34). A first slider (38) is fixedly connected to the inner wall of the movable groove (34). The first slider (38) is slidably connected to the inside of a first slide groove (39). The first slide groove (39) is opened on one side of the movable block (36).

7. The steel structure pre-assembly system based on the digital acquisition system according to claim 4 is characterized in that: The release assembly includes a second slide groove (40), the second slide groove (40) is opened on the fixed block (29), a slide rail (41) is fixedly connected to the inner wall of the second slide groove (40), a second slider (42) is slidably connected to the outer side of the slide rail (41), the second slider (42) is fixedly connected to the connecting plate (44), a third spring (43) is provided on the outer side of the slide rail (41), the connecting plate (44) is inserted into the interior of the active cavity (30), and the second slide groove (40) is sleeved on the outer side of the guide column (45), the guide column (45) is fixedly connected to the inner wall of the active cavity (30), and a fourth spring (46) is provided on the outer side of the guide column (45), a push plate (47) is fixedly connected to the side of the connecting plate (44) away from the second slider (42), and a fixed baffle (52) is fixedly connected to the inner wall of the lens chamber (21).

8. The steel structure pre-assembly system based on the digital acquisition system according to claim 7 is characterized in that: The side of the third spring (43) close to the second slider (42) is fixedly connected to the second slider (42), and the side of the third spring (43) away from the second slider (42) is fixedly connected to the inner wall of the second slide groove (40). One end of the fourth spring (46) close to the connecting plate (44) is fixedly connected to the connecting plate (44), and the side of the fourth spring (46) away from the connecting plate (44) is fixedly connected to the inner wall of the movable cavity (30). The side of the fixed baffle (52) close to the upper body (2) is fixedly connected to the third slider (48), and the third slider (48) is slidably connected to the inside of the third slide groove (49), and the third slide groove (49) is opened on the outside of the upper body (2).

9. The steel structure pre-assembly system based on a digital acquisition system according to claim 1, characterized in that: A first magnetic block (50) is fixedly connected to one side of the protective baffle (23) close to the fixed block (29); the first magnetic block (50) is attracted to a second magnetic block (51); and the second magnetic block (51) is fixedly connected to the inner wall of the lens chamber (21).

10. A steel structure pre-assembly construction simulation method based on a digital acquisition system is characterized by: A steel structure pre-assembly system based on a digital acquisition system according to any one of claims 1 to 9, the method comprising the following steps: S1: Calibrate the 3D scanner using a calibration device; S2: Place the 3D scanner on a tripod and use a long-distance lens to scan the entire steel structure entity; S3: The connection between the upper body (2) and the lower body (1) is released by releasing the assembly, and the lower body (1) is removed; when the lower body (1) is removed, the protective baffle (23) simultaneously releases the protection of the short-distance lens; the lower body (1) is held and scanned through the short-distance lens on a part of the steel structure entity, and the lower body (1) is reinstalled after the scanning is completed; S4: The data processing equipment processes the 3D point cloud data obtained by the 3D scanner, reconstructs the solid 3D model based on the results of multiple scans, and transmits the solid 3D model to the computer; S5: The computer compares the solid three-dimensional model with the steel structure three-dimensional model data to obtain a deviation result; simulates the assembly of the solid three-dimensional model to obtain an assembly result, and transmits the deviation result and the assembly result to the feedback terminal via a wireless connection.

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