BIM home decoration construction error laser positioning calibration device

Abstract

The utility model provides a kind of BIM home decoration construction error laser positioning calibration device, it is related to home decoration construction equipment technical field, its structure includes X direction moving assembly, Y direction moving assembly, level leveling assembly, lifting assembly, rotating assembly, laser projector and control panel, X direction and Y direction moving assembly realize two-dimensional movement on horizontal plane by screw rod drive, level leveling assembly passes through four corners leveling electric cylinder and gyroscope calibration device levelness, lifting assembly adjusts laser projector height by screw nut mechanism, rotating assembly realizes angle adjustment of laser projector by annular sliding slot and support rod, the utility model compares with BIM model by laser range finder real-time data acquisition, automatically controls each component collaborative action, realizes the accurate positioning and calibration of laser projector, directly projects home decoration construction drawing to wall, reduces artificial measurement error, significantly improves construction efficiency and accuracy.

Description

Technical Field

[0001] This utility model relates to the field of home decoration construction equipment technology, and in particular to a BIM home decoration construction error laser positioning calibration device. Background Technology

[0002] Currently, BIM technology has been gradually integrated into the home decoration construction field, enabling the visualization of home decoration design schemes through digital modeling. In key construction stages such as wall pre-grooving and pipeline laying, precise positioning based on the coordinates of the BIM model is required. In traditional construction, this often relies on manual comparison with drawings using measuring tapes and ink lines, or the assistance of simple laser tools. The overall process remains largely manual, and the positioning accuracy cannot match the digital precision of the BIM model, failing to meet the stringent requirements of modern home decoration for construction error accuracy.

[0003] To improve positioning accuracy, some improvements have been attempted in existing technologies. For example, laser projection technology is combined with simple moving structures to assist positioning by projecting construction baselines using lasers. Some devices have also introduced basic distance measurement functions, enabling preliminary comparison with design dimensions. However, these improvements mostly remain at the level of single-function optimization, lacking linkage optimization with BIM systems, and still have significant limitations in areas such as automatic position adjustment.

[0004] The core problems with existing technologies are: first, the matching degree between the positioning benchmark and the BIM model coordinates is low, and there is a lack of automatic calibration mechanism, requiring repeated manual adjustments, which is inefficient; second, there is a lack of real-time data interaction with the BIM system, making it impossible to achieve automatic correction through comparison of construction projections, which makes it difficult to detect and avoid construction errors in advance. Utility Model Content

[0005] To address the technical deficiencies in the background technology, this utility model proposes a laser positioning and calibration device for BIM home decoration construction errors. To further solve the aforementioned technical problems and meet practical needs, the specific technical solution is as follows:

[0006] A BIM home decoration construction error laser positioning calibration device includes an X-axis moving component and a Y-axis moving component vertically mounted on the X-axis moving component and capable of movement. The Y-axis moving component is provided with a first mounting plate whose moving direction is perpendicular to the X-axis moving component. A lifting component, a rotating component, and a laser projector are sequentially mounted and connected from bottom to top on the surface of the first mounting plate. A control panel is mounted on one side of the lifting component. Laser rangefinders are respectively mounted at the middle sections of the four edges of the upper surface of the first mounting plate. A horizontal leveling component is provided below the X-axis moving component and connected thereto.

[0007] As a further technical solution of this utility model, the Y-axis moving component is provided with a second mounting bracket, the second mounting bracket is provided with a second moving groove along its length direction, the first mounting plate is movably disposed inside the second moving groove, the second mounting bracket is provided with a second lead screw and a second guide rod in the second moving groove, the second lead screw and the second guide rod pass through the first mounting plate and are rotatably connected at both ends to the side walls at both ends of the second moving groove.

[0008] As a further technical solution of this utility model, a second motor is installed at one end of the second mounting bracket, and the power output shaft of the second motor is connected to one end of the second lead screw for transmission.

[0009] As a further technical solution of this utility model, the X-direction moving component is provided with a first mounting frame, the first mounting frame is provided with a first moving groove along its length direction, the second mounting frame is movably disposed inside the first moving groove, the first mounting frame is provided with a first lead screw and a first guide rod in the first moving groove, the first lead screw and the first guide rod pass through the second mounting frame and are rotatably connected at both ends to the side walls at both ends of the first moving groove.

[0010] As a further technical solution of this utility model, a first motor is installed at one end of the first mounting bracket, and the power output shaft of the first motor is connected to one end of the first lead screw.

[0011] As a further technical solution of this utility model, the horizontal leveling assembly includes a fixed base plate disposed below the first mounting frame, a plurality of leveling electric cylinders hinged to the lower surface of the fixed base plate, a gyroscope disposed at the center position of the lower surface of the fixed base plate, and a steering motor disposed between the first mounting frame and the fixed base plate. A rotating disk is installed at the center position of the lower surface of the first mounting frame, the steering motor is installed at the center position of the upper surface of the fixed base plate, the center position of the lower surface of the rotating disk is connected to the steering motor, and the leveling electric cylinders are arranged in a ring on the lower surface of the fixed base plate.

[0012] As a further technical solution of this utility model, the lifting assembly includes a third mounting bracket mounted on the upper surface of the first mounting plate, a fixed outer cylinder mounted on the top of the third mounting bracket, a lifting motor mounted inside the third mounting bracket, a lifting inner cylinder slidably sleeved inside the fixed outer cylinder, and a third lead screw disposed inside the lifting inner cylinder and threadedly engaged with the inner wall of the lifting inner cylinder, the lower end of the third lead screw being connected to the power output shaft of the lifting motor.

[0013] As a further technical solution of this utility model, the rotating assembly includes a mounting box installed at the top of the lifting inner cylinder, a rotating seat is provided inside the mounting box, a rotating motor is connected to the bottom of the rotating seat, support rods are symmetrically arranged on both sides of the rotating seat, an annular groove corresponding to the position of the support rod is provided on the bottom surface of the mounting box, one end of the support rod is set in the annular groove and can slide with the annular groove, and the laser projector is installed at the center position of the upper surface of the rotating seat.

[0014] The beneficial effects of this utility model are as follows:

[0015] Through the lead screw drive structure of the X and Y axis moving components, combined with the distance comparison between the laser rangefinder and the BIM system built into the control panel, the device position can be automatically adjusted to ensure that the laser projector is accurately positioned at the bottom coordinates set in the BIM. The horizontal leveling component uses a leveling cylinder and gyroscope to calibrate the horizontal state in real time, avoiding projection deviation caused by tilting of the device. The lifting and rotating components can flexibly adjust the height and projection angle of the laser projector to adapt to different wall construction heights and range requirements. The laser projector directly projects home decoration construction drawings onto the wall, intuitively displaying the location of pre-grooving or pipelines, reducing workers' interpretation errors of drawings, and improving construction efficiency. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0017] Figure 2 This is a schematic diagram of the lifting component structure of this utility model.

[0018] Figure 3 A schematic diagram of the rotating component structure of this utility model.

[0019] Figure 4 A schematic diagram of the horizontal leveling component structure of this utility model.

[0020] Reference numerals: 1-X-direction moving assembly; 11-first mounting bracket; 12-first moving slot; 13-first motor; 14-first lead screw; 15-first guide rod; 2-Y-direction moving assembly; 21-second mounting bracket; 22-second moving slot; 23-first mounting plate; 24-second motor; 25-second lead screw; 26-second guide rod; 3-leveling assembly; 31-leveling electric cylinder; 32-steering motor; 33-gyroscope; 34-rotating disk; 35-fixed base plate; 4-lifting assembly; 41-lifting motor; 42-fixed outer cylinder; 43-lifting inner cylinder; 44-third mounting bracket; 45-third lead screw; 5-control panel; 6-rotating assembly; 61-mounting box; 62-rotating seat; 63-support rod; 64-annular groove; 65-rotating motor; 7-laser projector; 8-laser rangefinder. Detailed Implementation

[0021] The embodiments of this utility model will be described below with reference to the accompanying drawings and related examples. The embodiments of this utility model are not limited to the following examples, and this utility model relates to relevant necessary components in this technical field, which should be regarded as well-known technology in this technical field and can be known and mastered by those skilled in this technical field.

[0022] like Figures 1 to 4 As shown, this utility model provides a technical solution: a BIM home decoration construction error laser positioning calibration device, including an X-axis moving component 1 and a Y-axis moving component 2 vertically arranged on the X-axis moving component 1 and movable. The Y-axis moving component 2 is provided with a first mounting plate 23 whose moving direction is perpendicular to the X-axis moving component 1. A lifting component 4, a rotating component 6, and a laser projector 7 are sequentially installed and connected from bottom to top on the surface of the first mounting plate 23. A control panel 5 is installed on one side of the lifting component 4. Laser rangefinders 8 are respectively installed at the middle sections of the four edges of the upper surface of the first mounting plate 23. A horizontal leveling component 3 connected to the X-axis moving component 1 is provided below it.

[0023] This device, through the coordinated operation of its components, achieves improved accuracy in construction positioning in conjunction with the BIM system. The first lead screw 14 of the X-axis moving component 1 and the second lead screw 25 of the Y-axis moving component 2 form an orthogonal transmission structure. Together with the laser rangefinder 8 on the first mounting plate 23, it can measure the distance between the device and the wall in real time and transmit the data to the control panel 5. The BIM system built into the control panel 5 compares the measured distance with the model coordinates, then drives the first motor 13 and the second motor 24 to rotate the lead screws, automatically adjusting the device's position in the X and Y directions. This ensures that the laser projector 7 is precisely positioned at the bottom reference coordinates set by the BIM system, solving the problem of low matching accuracy between traditional positioning and the model.

[0024] In the horizontal leveling component 3, the gyroscope 33 monitors the tilt of the fixed base plate 35 in real time. If a deviation occurs, the leveling cylinder 31 will extend and retract to adjust accordingly, ensuring that the projection reference plane of the laser projector 7 is horizontal and avoiding projection offset caused by the tilt of the device. The lifting motor 41 of the lifting component 4 drives the third lead screw 45 to rotate, causing the inner lifting cylinder 43 to rise and fall along the fixed outer cylinder 42, which can adjust the projection height of the laser projector 7. When the rotating motor 65 of the rotating component 6 drives the rotating seat 62 to rotate, the support rod 63 slides along the annular groove 64 to enhance stability and realize flexible adjustment of the projection angle to adapt to different wall construction height and range requirements.

[0025] The laser projector 7 directly projects the BIM home decoration construction drawings onto the wall, allowing workers to intuitively compare the projected patterns during construction and reducing errors in interpreting the drawings. At the same time, combined with the real-time distance measurement of the laser rangefinder 8, deviations between the actual position and the model can be detected in advance, enabling the early avoidance of construction errors and significantly improving construction efficiency and accuracy.

[0026] It should be noted that the control panel 5 of this device integrates a control module and a BIM system. The control panel 5 is electrically connected to the first motor 13, the second motor 24, the leveling cylinder 31, the lifting motor 41, the rotary motor 65, the laser projector 7, the laser rangefinder 8, and the gyroscope 33. The laser rangefinder 8 and the gyroscope 33 serve as signal input components, transmitting distance and horizontal status data to the control module in real time. The control module, combined with preset parameters from the BIM system, sends action commands to the various actuators, such as the first motor 13 and the second motor 24, to achieve automatic adjustment. Furthermore, the laser projector 7 must have data synchronization capabilities with the BIM system, receiving real-time updated construction drawing data via the control panel 5's wireless transmission module, such as Bluetooth or Wi-Fi, to ensure that the projected image matches the latest design scheme.

[0027] It should be noted that this device is suitable for rooms where the four walls are perpendicular to the floor. When using this device, the room model must first be imported into the BIM system. Then, the two-dimensional coordinate point on the ground plane of the laser projector 7 is selected via the control panel 5. The distance from the laser rangefinder 8 to the four walls can be obtained from the room model imported into the BIM system. The worker places the device near the actual two-dimensional coordinate point on the ground plane of the room. The worker selects the wall to be measured in the BIM system via the control panel 5. Then, the control panel 5 uses the horizontal leveling component 3 to level the device and rotate it, causing the X-axis moving component 1 to move. The Y-axis moving component 2 is kept perpendicular to the wall to be measured, and the laser emitted by the laser rangefinder 8 remains horizontal. Then, the X-axis moving component 1 and the Y-axis moving component 2 move in the X and Y directions according to the distance of the device from the surrounding walls fed back by the laser rangefinder 8, so that the actual coordinates of the laser projector 7 on the ground correspond to the coordinates selected in the BIM system. Then, the worker controls the rotating component 6 through the control panel 5 to adjust the projection wall of the laser projector 7. The worker then adjusts the lifting height of the laser projector 7 through the control panel 5, so that the BIM home decoration construction drawing projected by the laser projector 7 matches the size of the wall.

[0028] As one of the preferred embodiments of this utility model, such as Figure 1As shown, the Y-axis moving component 2 is provided with a second mounting bracket 21, and the second mounting bracket 21 is provided with a second moving groove 22 along its length direction. The first mounting plate 23 is movably disposed inside the second moving groove 22. The second mounting bracket 21 is provided with a second lead screw 25 and a second guide rod 26 in the second moving groove 22. The second lead screw 25 and the second guide rod 26 pass through the first mounting plate 23 and are rotatably connected at both ends to the side walls at both ends of the second moving groove 22.

[0029] A second motor 24 is mounted on one end of the second mounting bracket 21, and the power output shaft of the second motor 24 is connected to one end of the second lead screw 25 for transmission.

[0030] In the above structure, the second lead screw 25 and the first mounting plate 23 have internal threads at their penetration points, forming a threaded engagement; the second guide rod 26 and the first mounting plate 23 have a sliding engagement, and the second guide rod 26 is symmetrically distributed on both sides of the second lead screw 25. This structure allows the first mounting plate 23 to move stably along the second guide rod 26 when the second lead screw 25 rotates, avoiding deviation or jamming. The second motor 24 and the second lead screw 25 are connected by a coupling, which reduces power transmission losses and vibrations.

[0031] During the coordinated operation of the Y-axis moving component 2 and the control panel 5, the laser rangefinder 8 transmits the distance data of the current position of the first mounting plate 23 to the control panel 5. The control module of the control panel 5, combined with the target coordinates preset by the BIM system, calculates the distance and direction that the first mounting plate 23 needs to move. Then, the control panel 5 sends a drive signal to the second motor 24 to control its forward or reverse rotation, which drives the second lead screw 25 to rotate synchronously, so that the first mounting plate 23 moves along the second moving groove 22 to the target position.

[0032] As one of the preferred embodiments of this utility model, such as Figure 1 As shown, the X-axis moving component 1 is provided with a first mounting bracket 11, and the first mounting bracket 11 is provided with a first moving groove 12 along its length direction. The second mounting bracket 21 is movably disposed inside the first moving groove 12. The first mounting bracket 11 is provided with a first lead screw 14 and a first guide rod 15 in the first moving groove 12. The first lead screw 14 and the first guide rod 15 pass through the second mounting bracket 21 and are rotatably connected at both ends to the side walls at both ends of the first moving groove 12.

[0033] A first motor 13 is mounted on one end of the first mounting bracket 11, and the power output shaft of the first motor 13 is connected to one end of the first lead screw 14.

[0034] In the above structure, the first lead screw 14 and the second mounting bracket 21 are provided with matching threaded holes at their penetration points, forming a threaded transmission pair; the first guide rod 15 and the second mounting bracket 21 are clearance-fitted, and the first guide rod 15 is distributed parallel to both sides of the first lead screw 14 to ensure that the second mounting bracket 21 remains stable during movement. The first motor 13 and the first lead screw 14 are connected by a coupling, which can effectively compensate for the coaxiality error between the two shafts and reduce transmission vibration.

[0035] During the coordinated operation of the X-direction moving component 1 and the control panel 5, the laser rangefinder 8 collects the distance data between the device and the wall in real time and transmits it to the control panel 5. The control module compares the measured data with the preset coordinates of the BIM system and calculates the displacement and direction of movement of the second mounting bracket 21 in the X direction. The control panel 5 controls the first motor 13 to rotate forward and backward according to the calculated displacement and direction of movement in the X direction, driving the first lead screw 14 to rotate, so that the second mounting bracket 21 moves in a straight line along the first guide rod 15.

[0036] As one of the preferred embodiments of this utility model, such as Figure 1 As shown, the horizontal leveling assembly 3 includes a fixed base plate 35 disposed below the first mounting frame 11, a plurality of leveling electric cylinders 31 hinged to the lower surface of the fixed base plate 35, a gyroscope 33 disposed at the center position of the lower surface of the fixed base plate 35, and a steering motor 32 disposed between the first mounting frame 11 and the fixed base plate 35. A rotating disk 34 is mounted at the center position of the lower surface of the first mounting frame 11, and the steering motor 32 is mounted at the center position of the upper surface of the fixed base plate 35. The center position of the lower surface of the rotating disk 34 is connected to the steering motor 32. The leveling electric cylinders 31 are arranged in a ring on the lower surface of the fixed base plate 35.

[0037] The top of the telescopic rod of the leveling electric cylinder 31 is connected to the fixed base plate 35 via a ball joint (not shown), which allows for angle adjustment of the fixed base plate 35. The gyroscope 33 is a three-axis digital sensor that can detect the tilt angle data of the fixed base plate 35 in the X, Y, and Z axes and convert it into electrical signals that are transmitted to the control panel 5. The four leveling electric cylinders 31 are powered independently. The control panel 5 adjusts the fixed base plate 35 according to the tilt angle data signal fed back by the gyroscope 33 to keep it level.

[0038] Furthermore, when the gyroscope 33 detects that the fixed base plate 35 is tilted, the control module of the control panel 5 calculates the required extension and retraction of each leveling cylinder 31 according to the tilt angle and direction, and drives the corresponding leveling cylinder 31 to move.

[0039] The steering motor 32 is installed at the center of the fixed base plate 35, and the center of the lower surface of the rotating disk 34 is connected to the steering motor 32, so that the steering motor 32 can drive the X-axis moving component 1 and the Y-axis moving component 2 to rotate, thereby keeping the laser emitted by the laser rangefinder 8 perpendicular to the wall surface to be measured, and ensuring the accuracy of the ground position coordinates corresponding to the laser projector 7.

[0040] As one of the preferred embodiments of this utility model, such as Figure 1 and Figure 2 As shown, the lifting assembly 4 includes a third mounting bracket 44 mounted on the upper surface of the first mounting plate 23, a fixed outer cylinder 42 mounted on the top of the third mounting bracket 44, a lifting motor 41 mounted inside the third mounting bracket 44, a lifting inner cylinder 43 slidably sleeved inside the fixed outer cylinder 42, and a third lead screw 45 disposed inside the lifting inner cylinder 43 and threadedly engaged with the inner wall of the lifting inner cylinder 43. The lower end of the third lead screw 45 is connected to the power output shaft of the lifting motor 41.

[0041] The third lead screw 45 is threaded into the inner wall of the lifting inner cylinder 43 to ensure smooth transmission and has a self-locking function. The lifting motor 41 is a servo motor with an electromagnetic brake, which can immediately lock the third lead screw 45 when the power is off to prevent the lifting inner cylinder 43 from sliding down due to its own weight. The inner wall of the fixed outer cylinder 42 is provided with a limiting groove along the lifting direction. The bottom end of the lifting inner cylinder 43 is provided with a slider that can cooperate with the limiting groove and perform limited sliding, thereby preventing the lifting inner cylinder 43 from separating from the fixed outer cylinder 42 during the rising process.

[0042] As one of the preferred embodiments of this utility model, such as Figure 1 and Figure 3 As shown, the rotating assembly 6 includes a mounting box 61 installed at the top of the lifting inner cylinder 43. A rotating seat 62 is provided inside the mounting box 61. A rotating motor 65 is connected to the bottom of the rotating seat 62. Support rods 63 are symmetrically arranged on both sides of the rotating seat 62. An annular groove 64 corresponding to the position of the support rod 63 is provided on the bottom surface of the mounting box 61. One end of the support rod 63 is located in the annular groove 64 and can slide with the annular groove 64. The laser projector 7 is installed at the center of the upper surface of the rotating seat 62.

[0043] When the rotating component 6 is running, the rotating motor 65 drives the rotating seat 62 to perform circular motion around the vertical axis. When the control panel 5 sends a rotation command, the power output shaft of the rotating motor 65 drives the rotating seat 62 to rotate synchronously. At this time, the symmetrically arranged support rods 63 slide along the annular groove 64, playing a supporting and guiding role to ensure a smooth rotation process. Workers can select the wall to be projected through the BIM system of the control panel 5. Then, the control module of the control panel 5 dynamically adjusts the speed and direction of the rotating motor 65. When the laser projector 7 needs to project construction drawings of different walls, the rotating component 6 can quickly respond and rotate the laser projector 7 to the target angle.

[0044] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A BIM home decoration construction error laser positioning calibration device, comprising an X-axis moving component (1) and a Y-axis moving component (2) vertically arranged on the X-axis moving component (1) and movable, characterized in that, The Y-axis moving component (2) is provided with a first mounting plate (23) whose moving direction is perpendicular to the X-axis moving component (1). The first mounting plate (23) is connected to a lifting component (4), a rotating component (6), and a laser projector (7) in sequence from bottom to top. A control panel (5) is installed on one side of the lifting component (4). A laser rangefinder (8) is installed at the middle section of the four edges of the upper surface of the first mounting plate (23). A horizontal leveling component (3) is provided below the X-axis moving component (1) and connected to it.

2. The BIM home decoration construction error laser positioning calibration device according to claim 1, characterized in that, The Y-axis moving component (2) is provided with a second mounting bracket (21), and the second mounting bracket (21) is provided with a second moving groove (22) along its length direction. The first mounting plate (23) is movably disposed inside the second moving groove (22). The second mounting bracket (21) is provided with a second lead screw (25) and a second guide rod (26) in the second moving groove (22). The second lead screw (25) and the second guide rod (26) pass through the first mounting plate (23) and are rotatably connected at both ends to the side walls at both ends of the second moving groove (22).

3. The BIM home decoration construction error laser positioning calibration device according to claim 2, characterized in that, The second motor (24) is mounted on one end of the second mounting bracket (21), and the power output shaft of the second motor (24) is connected to one end of the second lead screw (25) for transmission.

4. The BIM home decoration construction error laser positioning calibration device according to claim 2, characterized in that, The X-direction moving component (1) is provided with a first mounting bracket (11), and the first mounting bracket (11) is provided with a first moving groove (12) along its length direction. The second mounting bracket (21) is movably disposed inside the first moving groove (12). The first mounting bracket (11) is provided with a first lead screw (14) and a first guide rod (15) in the first moving groove (12). The first lead screw (14) and the first guide rod (15) pass through the second mounting bracket (21) and are rotatably connected at both ends to the side walls at both ends of the first moving groove (12).

5. A laser positioning calibration device for BIM home decoration construction errors according to claim 4, characterized in that, The first motor (13) is mounted on one end of the first mounting bracket (11), and the power output shaft of the first motor (13) is connected to one end of the first lead screw (14) for transmission.

6. The BIM home decoration construction error laser positioning calibration device according to claim 4, characterized in that, The horizontal leveling assembly (3) includes a fixed base plate (35) disposed below the first mounting frame (11), a plurality of leveling electric cylinders (31) hinged to the lower surface of the fixed base plate (35), a gyroscope (33) disposed at the center of the lower surface of the fixed base plate (35), and a steering motor (32) disposed between the first mounting frame (11) and the fixed base plate (35). A rotating disk (34) is installed at the center of the lower surface of the first mounting frame (11). The steering motor (32) is installed at the center of the upper surface of the fixed base plate (35). The center of the lower surface of the rotating disk (34) is connected to the steering motor (32). The leveling electric cylinders (31) are arranged in a ring on the lower surface of the fixed base plate (35).

7. A laser positioning calibration device for BIM home decoration construction errors according to claim 2, characterized in that, The lifting assembly (4) includes a third mounting bracket (44) mounted on the upper surface of the first mounting plate (23), a fixed outer cylinder (42) mounted on the top of the third mounting bracket (44), a lifting motor (41) mounted inside the third mounting bracket (44), a lifting inner cylinder (43) slidably sleeved inside the fixed outer cylinder (42), and a third lead screw (45) disposed inside the lifting inner cylinder (43) and threadedly engaged with the inner wall of the lifting inner cylinder (43). The lower end of the third lead screw (45) is connected to the power output shaft of the lifting motor (41).

8. A laser positioning calibration device for BIM home decoration construction errors according to claim 7, characterized in that, The rotating assembly (6) includes a mounting box (61) installed at the top of the lifting inner cylinder (43). A rotating seat (62) is provided inside the mounting box (61). A rotating motor (65) is connected to the bottom of the rotating seat (62). Support rods (63) are symmetrically arranged on both sides of the rotating seat (62). An annular groove (64) corresponding to the position of the support rod (63) is provided on the bottom surface of the mounting box (61). One end of the support rod (63) is set in the annular groove (64) and can slide with the annular groove (64). The laser projector (7) is installed at the center of the upper surface of the rotating seat (62).

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