Building prefabricated component size detection device based on BIM

Abstract

The invention belongs to the technical field of size detection, and particularly relates to a BIM (Building Information Modeling)-based building prefabricated part size detection device, which comprises a base, the device further comprises a first conveyor, a second conveyor, a scanning detection mechanism, a waste grabbing mechanical arm, a guide mechanism, a roughness synchronous detection mechanism, a waste quantity statistics mechanism, a continuous detection disqualification warning mechanism, a processor and a PLC. According to the invention, a detected component can be guided and positioned, so that the component can be moved to a detection station more accurately, the smoothness of the surface of the component can be synchronously detected in the guiding process, and the laser intensity of the three-dimensional laser scanner is automatically regulated and controlled based on the difference of the smoothness of the component, so that the detection accuracy is improved. The number of unqualified components can be counted, and when the number of the unqualified components exceeds a set threshold value or the number of the unqualified components continuously exceeds 10 times, a signal is fed back in time to remind a worker to make corresponding processing.

Description

Technical Field

[0001] The invention belongs to the technical field of size detection, and in particular relates to a BIM-based building prefabricated component size detection device. Background Art

[0002] The size detection device for building prefabricated components based on BIM (Building Information Model) is a device that uses BIM model data and advanced measurement technology to accurately detect the size of prefabricated components. It can compare the theoretical size data in the BIM model with the actual measurement data to determine whether the size of the prefabricated components meets the design requirements. In the process of building industrialization, the quality of prefabricated components is crucial. Accurate size detection can ensure the smooth assembly of prefabricated components on site and reduce construction problems caused by size deviations, such as assembly difficulties and structural safety hazards. At the same time, it improves building quality and construction efficiency. For example, the patent with patent announcement number CN113607055A proposes a size detection device for prefabricated components for construction projects based on the BIM model.

[0003] The 3D laser scanning system is the core part of the detection device. It acquires 3D point cloud data of the surface of prefabricated components by emitting laser beams and receiving reflected light. For example, its working principle is similar to the echolocation of bats. The laser beam is reflected back after encountering the surface of the prefabricated component. The scanning system calculates the spatial coordinates of each point based on information such as the time and angle of the laser round trip. The 3D laser scanning system has the characteristics of high precision and high speed. It can acquire a large amount of point cloud data in a short time and can depict the geometric shape of the prefabricated components in detail. These point cloud data can be used to construct the actual 3D model of the prefabricated components for subsequent comparison with the BIM model. However, when using a 3D laser scanner to scan and detect objects, the laser intensity of the detection is fixed. However, for objects with different surface smoothness, the fixed laser detection intensity It will cause differences in detection quality. The reflection of laser on smooth surface is more concentrated and regular, similar to mirror reflection. A lower intensity laser can generate a strong enough reflection signal to be received by the scanner, thereby obtaining information about the surface of the object. The rough surface will cause the laser to diffusely reflect and scatter the reflected light in all directions, resulting in a relatively weak light intensity reflected back to the scanner. Therefore, a higher laser intensity is required to ensure that enough signals are received to accurately obtain detailed information about the surface of the object. For smooth surfaces, if too high a laser intensity is used, it is easy to cause excessive reflection light, resulting in overexposure, making the scanned data inaccurate, affecting the scanning accuracy, and even damaging the scanner's photosensitive element. On the contrary, if the laser intensity used on a rough surface is insufficient, sufficient reflected light signals cannot be obtained, resulting in data loss and an inability to completely build a three-dimensional model of the object. Summary of the invention

[0004] The purpose of the present invention is to provide a BIM-based building prefabricated component size detection device in view of the above problems.

[0005] To achieve the above object, the present invention adopts the following technical solution: a BIM-based building prefabricated component size detection device, including a base, and also including: The first conveyor and the second conveyor are fixedly mounted on the upper end of the base, and the second conveyor is arranged at the end position of the first conveyor; A scanning and detecting mechanism is fixedly mounted on the upper end of the base and located on one side of the first conveyor; A waste grabbing mechanical arm is fixedly mounted on the upper end of the base; A guide mechanism, fixedly mounted at the input end of the first conveyor; A roughness synchronous detection mechanism is mounted on the guide mechanism; A waste quantity counting mechanism is fixedly mounted on the upper end of the base and located at the lower side of the first conveyor; A continuous detection unqualified warning mechanism is fixedly installed at the rear end of the waste quantity counting mechanism and is transmission-connected with the waste quantity counting mechanism; A processor, fixedly mounted on the upper end of the base and connected to the scanning and detecting mechanism by signal; The PLC controller is fixedly mounted on the upper end of the base and is respectively electrically connected to the first conveyor, the second conveyor, the scanning detection mechanism, the scrap grabbing mechanical arm, the roughness synchronous detection mechanism, the scrap quantity statistics mechanism and the continuous detection unqualified warning mechanism.

[0006] In the above-mentioned BIM-based building prefabricated component size detection device, the scanning and detection mechanism includes an L-shaped support plate fixedly mounted on the rear side of the upper end of the base, the upper end of the L-shaped support plate is rotatably sleeved with a rotating shaft, the upper end of the L-shaped support plate is fixedly mounted with a motor rotating assembly for driving the rotating shaft to rotate, the lower end of the rotating shaft is fixedly connected with a connecting frame, the lower end of the connecting frame is fixedly connected with a mounting plate, a three-dimensional laser scanner is fixedly mounted on the mounting plate, the lower end of the horizontal part of the L-shaped support plate is fixedly mounted with an in-place switch located on one side of the connecting frame, and the outer wall of the connecting frame is fixedly mounted with an arc-shaped pressing block arranged corresponding to the position of the in-place switch.

[0007] In the above-mentioned BIM-based building prefabricated component size detection device, the guide mechanism includes two guide plates symmetrically fixedly installed at the front end of the first conveyor, the guide plates and the first conveyor are fixedly connected together by multiple reinforcing rods, and the front end of the guide plates is set as a bending portion that is bent and extended outward.

[0008] In the above-mentioned BIM-based building prefabricated component size detection device, the roughness synchronous detection mechanism includes a friction block, wherein the side wall of one of the guide plates is provided with a groove for placing the friction block, and the inner wall of the groove is fixedly connected to a plurality of guide slide rods arranged side by side, and the side wall of the friction block is provided with a guide slide hole slidably sleeved with the guide slide rod, and the friction block and the opposite side of the groove are fixedly connected with a plurality of reset springs sleeved outside the guide slide rod, and the groove bottom of the groove is symmetrically fixedly connected with two side plates, and two resistance rods are fixedly connected between the two side plates, and the same movable plate is movably sleeved outside the two resistance rods, and the side wall of the friction block is fixedly connected with a pushing plate located on one side of the movable plate, and the side of the movable plate away from the pushing plate is fixedly connected with a reset permanent magnet plate, and the side wall of one of the side plates is fixedly installed with a reset electromagnetic plate arranged opposite to the reset permanent magnet plate, and a feedback resistor rod is also fixedly installed between the two side plates, and one end of the movable plate is fixedly connected with a feedback conductive contact electrically in contact with the feedback resistor rod.

[0009] In the above-mentioned BIM-based building prefabricated component size detection device, the scrap quantity counting mechanism includes an electric push rod fixedly mounted on the upper end of the base, the top movable end of the electric push rod is fixedly connected to a counting shell, a transmission screw is rotatably connected inside the counting shell, one end of the transmission screw penetrates and extends out of the counting shell and is fixedly connected to a roller, a synchronous plate is threadedly sleeved on the rod wall of the transmission screw, and a threshold trigger switch arranged opposite to the synchronous plate is fixedly mounted on the rear side of the inner wall of the counting shell.

[0010] In the above-mentioned BIM-based building prefabricated component size detection device, the continuous detection unqualified warning mechanism includes a warning shell fixedly installed at the rear end of the statistical shell, a linkage screw is rotatably connected inside the warning shell, one end of the linkage screw penetrates and extends out of the warning shell, and is connected to the transmission screw through a bevel gear assembly; a plurality of limit sliding rods arranged parallel to the linkage screw are fixedly installed on the inner wall of the warning shell, and a plurality of the limit sliding rods are slidably sleeved on the outside of the same lifting shell; one end of the lifting shell is fixedly connected to an arcuate threaded plate through a telescopic connection mechanism, the arcuate threaded plate is threadedly connected to the linkage screw, and a warning switch arranged opposite to the lifting shell is fixedly installed on the top of the inner wall of the warning shell.

[0011] In the above-mentioned BIM-based building prefabricated component size detection device, the telescopic connection mechanism includes a plurality of telescopic rods movably inserted into one end of a lifting shell, one end of the plurality of telescopic rods located outside the lifting shell is fixedly connected to the outer wall of the arc-shaped threaded plate, and a plurality of thrust springs sleeved outside the telescopic rods are fixedly connected to the opposite side of the arc-shaped threaded plate and the lifting shell, and one end of the plurality of telescopic rods located inside the lifting shell is fixedly connected to the same insulating plate, a permanent magnetic plate is fixedly installed on the side wall of the insulating plate, and a suction electromagnetic plate arranged opposite to the permanent magnetic plate is fixedly installed on the inner wall of the lifting shell.

[0012] In the above-mentioned BIM-based building prefabricated component size detection device, a limit slider is fixedly installed on the outer wall of the synchronization plate, and a limit sliding groove matching and slidingly connected with the limit slider is opened on the inner wall of the statistical shell.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. Through the first conveyor, the second conveyor, the scrap grabbing robot arm, the scanning detection mechanism, and the processor, the components can be quickly laser scanned and detected, and continuous size detection can be performed, which greatly improves the detection efficiency, and the qualified and unqualified products can be classified and transferred, with a sorting function, reducing subsequent work steps.

[0014] 2. Through the setting of the guiding mechanism and the roughness synchronous detection mechanism, the component to be inspected can be guided and positioned, so that the component can be moved to the detection station more accurately, effectively improving the detection quality, and in the process of guiding, the smoothness of the component surface can be synchronously detected, and the laser intensity of the three-dimensional laser scanner can be automatically adjusted based on the different smoothness of the component. The smoother the component surface, the lower the laser intensity is set. Under the condition of ensuring the detection quality, avoid excessive laser intensity, which may easily lead to excessive reflected light and overexposure, making the scanned data inaccurate and affecting the scanning accuracy.

[0015] 3. Through the set scrap quantity statistics mechanism, continuous detection unqualified warning mechanism, and telescopic connection mechanism, the number of components that fail the inspection can be counted, and in the inspection work of a unit batch, when the number of unqualified components exceeds the set threshold, timely feedback signals are sent to remind the staff to take corresponding measures and check whether there are problems with the production line. When the number of unqualified components appears for more than 10 times in a row, direct feedback signals are sent to remind the staff to take corresponding measures, stop the inspection and adjust the production line. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2It is a structural schematic diagram of the scanning detection mechanism of the present invention; Figure 3 yes Figure 2 A magnified view of part A; Figure 4 It is a three-dimensional structural schematic diagram of the guide mechanism of the present invention; Figure 5 yes Figure 4 A schematic diagram of a cross-sectional structure of a middle guide plate viewed from above; Figure 6 It is a cross-sectional structural schematic diagram of the roughness synchronous detection mechanism of the present invention; Figure 7 yes Figure 6 A magnified view of part B; Figure 8 It is a side cross-sectional structural schematic diagram of the waste quantity counting mechanism of the present invention; Fig. 9 It is a schematic cross-sectional structure diagram of the continuous detection unqualified warning mechanism of the present invention; Fig.10 It is a three-dimensional structural schematic diagram of the telescopic connection mechanism of the present invention.

[0017] In the figure: 1 base, 2 scanning detection mechanism, 21 L-shaped support plate, 22 rotating shaft, 23 motor rotating assembly, 24 connecting frame, 25 mounting plate, 26 three-dimensional laser scanner, 27 in-position switch, 28 arc-shaped pressing block, 3 guide mechanism, 31 guide plate, 32 reinforcing rod, 4 roughness synchronous detection mechanism, 41 friction block, 42 ​​groove, 43 guide slide bar, 44 reset spring, 45 side plate, 46 resistance rod, 47 moving plate, 48 squeezing and pushing plate, 49 reset permanent magnet plate, 410 reset electromagnetic plate, 411 feedback resistance rod, 412 feedback conductive contact piece, 5 waste Quantity counting mechanism, 51 electric push rod, 52 counting shell, 53 transmission screw, 54 roller, 55 synchronization plate, 56 threshold trigger switch, 6 continuous detection unqualified warning mechanism, 61 warning shell, 62 linkage screw, 63 bevel gear assembly, 64 limit slide bar, 65 lifting shell, 66 arc threaded plate, 67 warning switch, 7 telescopic connection mechanism, 71 telescopic rod, 72 thrust spring, 73 insulation plate, 74 suction permanent magnet plate, 75 suction electromagnetic plate, 8 first conveyor, 9 second conveyor, 10 scrap grabbing robot arm, 11 processor, 12 PLC controller. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0019] like Figure 1-Figure 8As shown, a BIM-based building prefabricated component size detection device includes a base 1 and also includes: The first conveyor 8 and the second conveyor 9 are fixedly mounted on the upper end of the base 1, and the second conveyor 9 is arranged at the end position of the first conveyor 8; The scanning and detecting mechanism 2 is fixedly mounted on the upper end of the base 1 and is located on one side of the first conveyor 8. The scanning and detecting mechanism 2 includes an L-shaped supporting plate 21 fixedly mounted on the rear side of the upper end of the base 1. A rotating shaft 22 is rotatably sleeved on the upper end of the L-shaped supporting plate 21. A motor rotating assembly 23 for driving the rotating shaft 22 to rotate is fixedly mounted on the upper end of the L-shaped supporting plate 21. A connecting frame 24 is fixedly connected to the lower end of the rotating shaft 22. A mounting plate 25 is fixedly connected to the lower end of the connecting frame 24. A three-dimensional laser scanner 26 is fixedly mounted on the mounting plate 25. An in-position switch 27 located on one side of the connecting frame 24 is fixedly mounted on the lower end of the horizontal portion of the L-shaped supporting plate 21. An arc-shaped pressing block 28 corresponding to the position of the in-position switch 27 is fixedly mounted on the outer wall of the connecting frame 24. The components can be quickly laser scanned and detected, and continuous size detection can be performed, which greatly improves the detection efficiency.

[0020] The scrap grabbing robot arm 10 is fixedly mounted on the upper end of the base 1, and can transfer the qualified and unqualified products by classification, and has a sorting function, thereby reducing the subsequent work steps; The guide mechanism 3 is fixedly installed at the input end of the first conveyor 8. The guide mechanism 3 includes two guide plates 31 symmetrically fixedly installed at the front end of the first conveyor 8. The guide plate 31 and the first conveyor 8 are fixedly connected together by multiple reinforcing rods 32. The front end of the guide plate 31 is set as a bending portion that is bent and extended outward, which can guide and position the component to be inspected, so that the component can be moved to the inspection station more accurately, effectively improving the inspection quality.

[0021] The roughness synchronous detection mechanism 4 is installed on the guide mechanism 3. The roughness synchronous detection mechanism 4 includes a friction block 41. A groove 42 for placing the friction block 41 is opened on the side wall of one of the guide plates 31. A plurality of guide slide bars 43 arranged side by side are fixedly connected to the inner wall of the groove 42. A guide slide hole slidably sleeved with the guide slide bar 43 is opened on the side wall of the friction block 41. A plurality of return springs 44 sleeved on the outside of the guide slide bar 43 are fixedly connected to the opposite side of the friction block 41 and the groove 42. Two side plates 45 are symmetrically fixedly connected to the bottom of the groove 42. Two resistance rods 46 are fixedly connected between the two side plates 45. The two resistance rods 46 are fixedly connected to the two side plates 45. The force rod 46 is movably sleeved with a movable plate 47 outside, the side wall of the friction block 41 is fixedly connected with a pushing plate 48 located on one side of the movable plate 47, and the side of the movable plate 47 away from the pushing plate 48 is fixedly connected with a reset permanent magnet plate 49, a reset electromagnetic plate 410 arranged opposite to the reset permanent magnet plate 49 is fixedly installed on the side wall of one of the side plates 45, and a feedback resistor rod 411 is also fixedly installed between the two side plates 45, and one end of the movable plate 47 is fixedly connected with a feedback conductive contact piece 412 electrically contacting the feedback resistor rod 411, which can quickly detect the roughness of the surface of the prefabricated component and directly feedback the degree of roughness.

[0022] The scrap quantity counting mechanism 5 is fixedly mounted on the upper end of the base 1 and is located at the lower side of the first conveyor 8. The scrap quantity counting mechanism 5 comprises an electric push rod 51 fixedly mounted on the upper end of the base 1. The top moving end of the electric push rod 51 is fixedly connected with a counting shell 52. A transmission screw 53 is rotatably connected in the counting shell 52. One end of the transmission screw 53 extends through the counting shell 52 and is fixedly connected with a roller 54. A synchronous plate 55 is threadedly sleeved on the rod wall of the transmission screw 53. A threshold trigger switch 56 arranged opposite to the synchronous plate 55 is fixedly mounted on the rear side of the inner wall of the counting shell 52. A limit slider is fixedly mounted on the outer wall of the synchronous plate 55. A limit slide is provided on the inner wall of the counting shell 52 to match and slide with the limit slide. The limit slide groove can be provided on the inner wall of the counting shell 52 to count the number of unqualified components. When the number of unqualified components exceeds the set threshold value during the inspection work of a unit batch, a feedback signal is promptly sent to remind the staff to make corresponding processing.

[0023] The continuous detection unqualified warning mechanism 6 is fixedly installed at the rear end of the scrap quantity counting mechanism 5 and is transmission-connected with the scrap quantity counting mechanism 5. The continuous detection unqualified warning mechanism 6 includes a warning shell 61 fixedly installed at the rear end of the counting shell 52. A linkage screw 62 is rotatably connected in the warning shell 61. One end of the linkage screw 62 penetrates and extends out of the warning shell 61 and is transmission-connected with the transmission screw 53 through a bevel gear assembly 63. A plurality of limit slide bars 64 arranged parallel to the linkage screw 62 are fixedly installed on the inner wall of the warning shell 61. The plurality of limit slide bars 64 are slidingly sleeved with the same lifting shell 65. One end of the lifting shell 65 is fixedly connected with an arcuate threaded plate 66 through a telescopic connection mechanism 7. The arcuate threaded plate 66 is threadedly connected to the linkage screw 62. A warning switch 67 arranged opposite to the lifting shell 65 is fixedly installed on the top of the inner wall of the warning shell 61. When the number of unqualified components appears for more than 10 times in a row, a direct feedback signal is sent to remind the staff to make corresponding treatment, stop the detection and adjust the production line.

[0024] The telescopic connection mechanism 7 includes a plurality of telescopic rods 71 ​​movably inserted into one end of the lifting shell 65, one end of the plurality of telescopic rods 71 ​​located outside the lifting shell 65 is fixedly connected to the outer wall of the arc-shaped threaded plate 66, and a plurality of thrust springs 72 arranged outside the telescopic rods 71 ​​are fixedly connected to the opposite side of the arc-shaped threaded plate 66 and the lifting shell 65, one end of the plurality of telescopic rods 71 ​​located inside the lifting shell 65 is fixedly connected to the same insulating plate 73, a suction permanent magnetic plate 74 is fixedly installed on the side wall of the insulating plate 73, and a suction electromagnetic plate 75 arranged opposite to the suction permanent magnetic plate 74 is fixedly installed on the inner wall of the lifting shell 65.

[0025] The processor 11 is fixedly mounted on the upper end of the base 1 and is signal-connected to the scanning and detecting mechanism 2; The PLC controller 12 is fixedly mounted on the upper end of the base 1 and is electrically connected to the first conveyor 8, the second conveyor 9, the scanning detection mechanism 2, the scrap grabbing robot arm 10, the roughness synchronous detection mechanism 4, the scrap quantity statistics mechanism 5 and the continuous detection unqualified warning mechanism 6 respectively.

[0026] The operating principle of the present invention is described as follows: the component to be inspected is transferred through the first conveyor 8, and the limiting guiding effect of the guide plate 31 makes the component accurately positioned in the middle position of the first conveyor 8 until the component is transferred to the scanning and detecting mechanism 2, and the PLC controller 12 controls the first conveyor 8 to stop, and the PLC controller 12 controls the motor rotating assembly 23 to drive the rotating shaft 22 to cooperate with the connecting frame 24 to drive the mounting plate 25 to rotate, and the three-dimensional laser scanner 26 performs a comprehensive scanning operation on the surface of the component until the mounting plate 25 rotates one circle, at which time the arc-shaped pressing block 28 on the outer wall of the connecting frame 24 presses on the in-place switch 27 again, and at this time the PLC controller 12 controls the motor rotating assembly 23 to stop, completing the laser scanning of the component; The processor 11 has BIM model data of the component. The BIM model contains detailed design size, shape, material and other information of the prefabricated component. This information will be used as the standard for size detection. The data processing unit in the processor 11 processes the point cloud data obtained by the 3D laser scanner 26 to generate an actual 3D model of the prefabricated component. Then, the actual model is compared with the imported BIM model to calculate the size deviation in each direction. For example, for prefabricated wall components, the deviation values ​​of their length, height, thickness and other dimensions from the theoretical dimensions in the BIM model can be calculated to quickly determine whether the size of the component meets the standard value. When the detected size of the component meets the standard value, the PLC controller 12 controls the first conveyor 8 and the second conveyor 9 to work, and conveys the component to the storage position of qualified products through the second conveyor 9. When the detected size of the component does not meet the standard, the PLC controller 12 controls the waste grabbing mechanical arm 10 to move the component to the waste recycling place to realize the sorting function; In the process of guiding and detecting the component, the outer surface of the component contacts the friction block 41, thereby driving the friction block 41 to slide along the guide slide rod 43 to overcome the elastic force of the return spring 44. Specifically, the smoother the surface of the component, the smaller the friction resistance of the component to the friction block 41, so that the distance that the friction block 41 can slide to overcome the elastic force of the return spring 44 is smaller. When the friction block 41 moves, the pushing plate 48 pushes the moving plate 47 to slide synchronously along the resistance rod 46, thereby causing the moving plate 47 to drive the feedback conductive contact 412 to slide synchronously on the feedback resistance rod 411. The smoother the surface of the component, the smaller the moving distance of the friction block 41, the smaller the moving distance of the moving plate 47, and the smaller the sliding distance of the feedback conductive contact 412 on the feedback resistor rod 411, thereby making the access resistance of the feedback resistor rod 411 smaller, and the feedback conductive contact 412 and the feedback resistor rod 411 are connected in series to the power supply circuit of the motor rotating component 23, and the motor rotating component 23 is a DC motor component. At this time, the power supply current of the motor rotating component 23 is increased, and the moving speed of the motor rotating component 23 driving the three-dimensional laser scanner 26 is increased, and the scanning time is shortened, because the smooth component The laser reflection on the surface is relatively regular, similar to mirror reflection, which makes it relatively easy for the three-dimensional laser scanner 26 to capture the reflected light signal, and more effective point cloud data can be obtained more efficiently per unit time. Shortening the scanning time can improve the detection efficiency. On the contrary, when the outer surface roughness of the component is large, the friction resistance between the component and the friction block 41 is larger, so that the feedback conductive contact 412 slides on the feedback resistor rod 411. The access resistance value of the feedback resistor rod 411 is larger, and the rotation speed of the motor rotating component 23 is slower, which prolongs the detection time. Because the rough component surface causes the laser to be diffusely reflected, the reflected light is scattered in all directions, which causes the reflected light signal received by the scanner to be weak and messy. In order to obtain sufficient point cloud data that can accurately reflect the surface shape of the component, the scanner needs to emit more laser beams and may need to slow down the scanning speed to wait for enough reflected signals to be received and processed. For example, when scanning a stone with a rough surface, after the laser hits its surface, the reflected light diverges at all angles. The scanner needs to spend more time to capture these scattered reflected light signals, which makes the scanning process relatively slow. The resistance information of the feedback resistor rod 411 is fed back to the PLC controller 12. When the surface of the component is smoother, the access resistance of the feedback resistor rod 411 is smaller. At this time, the PLC controller 12 controls the three-dimensional laser scanner 26 to work at a lower laser intensity, because the smooth surface reflects the laser more concentratedly and regularly, similar to mirror reflection. A laser with a lower intensity can generate a sufficiently strong reflection signal to be received by the scanner, thereby obtaining information on the surface of the component. For a smooth surface, if too high a laser intensity is used, it is easy to cause excessive reflection light, resulting in overexposure, making the scanned data inaccurate, affecting the scanning accuracy, and even damaging the scanner's photosensitive element. When the surface of the component is rougher, the resistance of the feedback resistor rod 411 is larger. At this time, the PLC controller 12 controls the three-dimensional laser scanner 26 to work at a higher laser intensity. This is because the rough surface causes the laser to be diffusely reflected, and the reflected light is scattered in all directions, resulting in a relatively weak light intensity reflected back to the scanner. Therefore, a higher laser intensity is required to ensure that enough signals are received to accurately obtain detailed information on the component surface. If the laser intensity used on the rough surface is insufficient, it is impossible to obtain enough reflected light signals, resulting in data loss and the inability to completely build a three-dimensional model of the component. After each component inspection is completed, the PLC controller 12 controls the power supply device to supply power to the reset electromagnetic plate 410, and the reset electromagnetic plate 410 generates the same magnetism as the reset permanent magnet plate 49, thereby driving the moving plate 47 to reset and move along the resistance rod 46, waiting for the next component inspection; Whenever unqualified components are detected, when the first conveyor 8 is working, the PLC controller 12 controls the electric push rod 51 to push the statistical shell 52 up for 5 seconds, so that the roller 54 contacts the first conveyor 8. The first conveyor 8 is a belt conveyor, and the transmission work of the first conveyor 8 can synchronously drive the roller 54 to rotate, and the roller 54 drives the transmission screw 53 to rotate. The threaded sleeve of the transmission screw 53 and the synchronous plate 55 allows the synchronous plate 55 to move a distance in the statistical shell 52. Before the detection of the components of the current batch is completed, when the synchronous plate 55 presses on the threshold trigger switch 56, it means that the proportion of unqualified components exceeds the standard, and the PLC controller 12 transmits a wireless signal to the wireless receiving terminal of the staff, reminding the staff to investigate the production process of the current batch of components and confirm the source of the problem; When unqualified products appear and the transmission screw 53 is triggered to rotate, the transmission screw 53 will cooperate with the bevel gear assembly 63 to drive the linkage screw 62 to rotate synchronously, and the threaded sleeve effect of the linkage screw 62 and the arc-shaped threaded plate 66 makes the lifting shell 65 move up a distance along the limit slide 64. When qualified products are detected, the PLC controller 12 controls the power supply equipment to supply power to the suction electromagnetic plate 75. The suction electromagnetic plate 75 is energized to generate a magnetic field opposite to the suction permanent magnet plate 74, thereby driving the insulating plate 73 and the telescopic rod 71 to reset and move, and then The arc-shaped threaded plate 66 overcomes the action of the thrust spring 72 and leaves the linkage screw 62, and the lifting shell 65 is reset to its initial position again under the action of the gravity of the lifting shell 65. Only when unqualified products are detected for 10 consecutive times, the lifting shell 65 moves 10 times continuously, so that the lifting shell 65 presses on the warning switch 67. The PLC controller 12 transmits a wireless signal to the wireless receiving terminal of the staff, and promptly feeds back the signal to remind the staff to take corresponding measures, stop detection and adjust the production line.

[0027] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A BIM-based building prefabricated component size detection device, comprising a base (1), characterized in that: Also includes: A first conveyor (8) and a second conveyor (9) are fixedly mounted on the upper end of the base (1), and the second conveyor (9) is arranged at the end position of the first conveyor (8); A scanning detection mechanism (2) is fixedly mounted on the upper end of the base (1) and is located on one side of the first conveyor (8); A waste grabbing mechanical arm (10) is fixedly mounted on the upper end of the base (1); A guide mechanism (3) fixedly mounted at the input end of the first conveyor (8); A roughness synchronous detection mechanism (4) is mounted on the guide mechanism (3); A waste quantity counting mechanism (5) is fixedly mounted on the upper end of the base (1) and is located on the lower side of the first conveyor (8); A continuous detection unqualified warning mechanism (6) is fixedly mounted at the rear end of the waste quantity counting mechanism (5) and is transmission-connected to the waste quantity counting mechanism (5); A processor (11) is fixedly mounted on the upper end of the base (1) and is signal-connected to the scanning and detecting mechanism (2); A PLC controller (12) is fixedly mounted on the upper end of the base (1) and is electrically connected to the first conveyor (8), the second conveyor (9), the scanning detection mechanism (2), the scrap grabbing mechanical arm (10), the roughness synchronous detection mechanism (4), the scrap quantity statistics mechanism (5) and the continuous detection unqualified warning mechanism (6).

2. The BIM-based building prefabricated component size detection device according to claim 1, characterized in that: The scanning detection mechanism (2) comprises an L-shaped support plate (21) fixedly mounted on the rear side of the upper end of the base (1); a rotating shaft (22) is rotatably sleeved on the upper end of the L-shaped support plate (21); a motor rotating assembly (23) for driving the rotating shaft (22) to rotate is fixedly mounted on the upper end of the L-shaped support plate (21); a connecting frame (24) is fixedly connected to the lower end of the rotating shaft (22); a mounting plate (25) is fixedly connected to the lower end of the connecting frame (24); a three-dimensional laser scanner (26) is fixedly mounted on the mounting plate (25); an in-position switch (27) located on one side of the connecting frame (24) is fixedly mounted on the lower end of the horizontal portion of the L-shaped support plate (21); and an arc-shaped pressing block (28) corresponding to the position of the in-position switch (27) is fixedly mounted on the outer wall of the connecting frame (24).

3. The BIM-based building prefabricated component size detection device according to claim 1, characterized in that: The guide mechanism (3) comprises two guide plates (31) symmetrically fixedly mounted on the front end of the first conveyor (8); the guide plates (31) and the first conveyor (8) are fixedly connected together via a plurality of reinforcing rods (32); and the front end of the guide plates (31) is provided as a bent portion that is bent and extended outward.

4. The BIM-based building prefabricated component size detection device according to claim 3, characterized in that: The roughness synchronous detection mechanism (4) comprises a friction block (41), wherein a side wall of one of the guide plates (31) is provided with a groove (42) for placing the friction block (41), the inner wall of the groove (42) is fixedly connected to a plurality of guide slide bars (43) arranged side by side, the side wall of the friction block (41) is provided with a guide slide hole slidably sleeved with the guide slide bar (43), a plurality of return springs (44) sleeved outside the guide slide bar (43) are fixedly connected to the opposite side of the friction block (41) and the groove (42), the groove bottom of the groove (42) is symmetrically fixedly connected to two side plates (45), and two resistance springs (44) are fixedly connected between the two side plates (45). Rod (46), two resistance rods (46) are movably sleeved with a same movable plate (47) outside, the side wall of the friction block (41) is fixedly connected with a pushing plate (48) located on one side of the movable plate (47), the side of the movable plate (47) away from the pushing plate (48) is fixedly connected with a reset permanent magnet plate (49), a side wall of one of the side plates (45) is fixedly provided with a reset electromagnetic plate (410) arranged opposite to the reset permanent magnet plate (49), a feedback resistance rod (411) is also fixedly provided between the two side plates (45), and one end of the movable plate (47) is fixedly connected with a feedback conductive contact piece (412) electrically contacting the feedback resistance rod (411).

5. The BIM-based building prefabricated component size detection device according to claim 1, characterized in that: The scrap quantity counting mechanism (5) comprises an electric push rod (51) fixedly mounted on the upper end of the base (1); the top movable end of the electric push rod (51) is fixedly connected to a counting housing (52); a transmission screw (53) is rotatably connected inside the counting housing (52); one end of the transmission screw (53) penetrates and extends out of the counting housing (52) and is fixedly connected to a roller (54); a synchronous plate (55) is threadedly sleeved on the rod wall of the transmission screw (53); and a threshold trigger switch (56) arranged opposite to the synchronous plate (55) is fixedly mounted on the rear side of the inner wall of the counting housing (52).

6. The BIM-based building prefabricated component size detection device according to claim 5, characterized in that: The continuous detection unqualified warning mechanism (6) comprises a warning shell (61) fixedly mounted on the rear end of the statistical shell (52), a linkage screw (62) being rotatably connected inside the warning shell (61), one end of the linkage screw (62) extending through the warning shell (61) and extending outside the warning shell (61), and being transmission-connected to the transmission screw (53) via a bevel gear assembly (63), a plurality of limit slide bars (64) arranged parallel to the linkage screw (62) being fixedly mounted on the inner wall of the warning shell (61), a plurality of limit slide bars (64) being slidably sleeved on the outer sides of the plurality of limit slide bars (64) being slidably sleeved with the same lifting shell (65), one end of the lifting shell (65) being fixedly connected to an arcuate threaded plate (66) via a telescopic connection mechanism (7), the arcuate threaded plate (66) being threadedly connected to the linkage screw (62), and a warning switch (67) arranged opposite to the lifting shell (65) being fixedly mounted on the top of the inner wall of the warning shell (61).

7. The BIM-based building prefabricated component size detection device according to claim 6, characterized in that: The telescopic connection mechanism (7) comprises a plurality of telescopic rods (71) movably inserted into one end of the lifting shell (65); one end of the plurality of telescopic rods (71) located outside the lifting shell (65) is fixedly connected to the outer wall of the arc-shaped threaded plate (66); a plurality of thrust springs (72) sleeved outside the telescopic rods (71) are fixedly connected to the opposite side of the arc-shaped threaded plate (66) and the lifting shell (65); one end of the plurality of telescopic rods (71) located inside the lifting shell (65) is fixedly connected to the same insulating plate (73); a suction permanent magnetic plate (74) is fixedly mounted on the side wall of the insulating plate (73); and a suction electromagnetic plate (75) arranged opposite to the suction permanent magnetic plate (74) is fixedly mounted on the inner wall of the lifting shell (65).

8. The BIM-based building prefabricated component size detection device according to claim 5, characterized in that: A limit sliding block is fixedly mounted on the outer wall of the synchronization plate (55), and a limit sliding groove matching and slidingly connected with the limit sliding block is opened on the inner wall of the statistical housing (52).

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