A high-precision scanning head structure for a 3D laser scanner

Abstract

This utility model relates to the field of 3D laser scanner technology, specifically a high-precision scanning head structure for a 3D laser scanner. It includes a handle with high-precision scanning ends at both ends. A stepper motor is fixed to one side of the handle near both ends, containing a lead screw body. The handle has a hollow area, with a connecting block at one end of the lead screw body and a connecting seat fixed to one end. A hinge seat is located at one end of the high-precision scanning end. Connecting plates one and two are located on either side of the hinge seat and the connecting seat. The high-precision scanning end and the handle are hinged together. This utility model solves the problem that in existing handheld 3D laser scanners, the high-precision scanning ends at both ends of the handle are generally fixed to the handle. During scanning, if the object being measured has obstructions, complete 3D data may not be obtained. Furthermore, scanning data may be inaccurate or incomplete for transparent, reflective, or light-absorbing surfaces, making it inconvenient to scan larger workpieces.

Description

Technical Field

[0001] This utility model relates to the field of 3D laser scanner technology, specifically to a high-precision scanning head structure for a 3D laser scanner. Background Technology

[0002] Handheld 3D laser scanners typically use lasers as a light source. The laser beam is projected onto the surface of the object being measured through an emitter inside the scanner. When the laser beam hits the object's surface, the light is reflected or scattered. These reflected or scattered rays are then received by the handheld scanner's photosensitive element (such as a CCD or CMOS sensor). The scanner is usually equipped with two or more cameras (or sensors) that are placed at a certain angle relative to each other to capture the reflected light. Due to the different curvatures of the object's surface, the reflected light will form different images on the two cameras. The acquired image data undergoes a series of processing and calculations, including image registration and triangulation, to finally obtain the three-dimensional geometric information of the object's surface. It has advantages such as high precision, high efficiency, good portability, and non-contact measurement.

[0003] However, the high-precision scanning ends of existing handheld 3D laser scanners are generally fixed to the handle. During scanning, the angle between the two high-precision scanning ends is fixed. If there are obstructions on the object being measured, complete 3D data may not be obtained, requiring multiple scans or adjustments to the scanning angle. Furthermore, transparent, reflective, or light-absorbing surfaces may lead to inaccurate or missing scanning data. In addition, the specific angle range also limits the scanning range, making it inconvenient to scan larger workpieces. Utility Model Content

[0004] The technical problem this invention aims to solve is that the high-precision scanning ends of existing handheld 3D laser scanners are generally fixed to the handle. During the scanning process, if the object being measured has obstructions, complete three-dimensional data may not be obtained, requiring multiple scans or adjustments to the scanning angle. Furthermore, transparent, reflective, or light-absorbing surfaces may lead to inaccurate or missing scanning data. In addition, the specific angle range also limits the scanning range, making it inconvenient to scan larger workpieces.

[0005] To solve the above problems, the technical solution adopted by this utility model is a high-precision scanning head structure for a 3D laser scanner, including a handle, with high-precision scanning ends at both ends of the handle, and a stepper screw motor fixed on one side of the handle near both ends. A screw body is rotatably provided on the inner side of the stepper screw motor, and a hollow area is opened inside the handle at the screw body. A connecting block is rotatably provided at one end of the screw body, and a connecting seat is fixed at one end of the connecting block. A hinge seat is fixed on the side of one end of the high-precision scanning end, and a connecting plate one and a connecting plate two are respectively hinged to the hinge seat and the connecting seat on both sides. The edge of the other end of the high-precision scanning end is hinged to the edge of the handle one.

[0006] As a further embodiment of this utility model: one end of the high-precision scanning end is provided with a laser emitting end and a camera, and the other end of the high-precision scanning end is connected to a device line.

[0007] As a further embodiment of this utility model: an adjustment button is embedded on one side of the handle for controlling the stepper screw motor, and a start button and power cord are provided on the adjacent side.

[0008] As a further embodiment of this invention: the two stepper motors are of the same model and the initial position of the lead screw body is the same, so as to synchronously adjust the rotation angle of the two high-precision scanning ends.

[0009] As a further embodiment of this invention: both the handle and the high-precision scanning end are electrically connected to an external power source and a computer device.

[0010] Compared with the prior art, the advantages of this utility model are as follows: This application adds a high-precision scanning end that can adjust the scanning angle. By adjusting the included angle between a pair of high-precision scanning ends, it is possible to perform multiple laser scans of the workpiece at different angles, thereby further improving the scanning accuracy. Attached Figure Description

[0011] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0012] Figure 1 This is a three-dimensional view of the overall structure of the high-precision scanning head structure of a 3D laser scanner according to this utility model.

[0013] Figure 2 This is a partial structural cross-sectional view of the high-precision scanning head structure of a 3D laser scanner according to the present invention.

[0014] Figure 3 This is an enlarged view of part A of the high-precision scanning head structure of a 3D laser scanner according to this utility model.

[0015] Figure 4 This is an enlarged view of section B of the high-precision scanning head structure of a 3D laser scanner according to this utility model.

[0016] In the attached image:

[0017] 1. Handle; 2. High-precision scanning end; 3. Stepper screw motor; 4. Screw body; 5. Connecting block; 6. Connecting seat; 7. Hinge seat; 8. Connecting plate one; 9. Connecting plate two; 10. Equipment line; 11. Adjustment button; 12. Start button; 1.1. Hollow area. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] This utility model provides a technical solution to address the existing problems mentioned in the background art.

[0020] Combined with appendix Figure 1-4 It can be seen that the grip includes a handle 1, an adjustment button 11 is embedded on one side of the handle 1 for controlling the stepper screw motor 3, and a start button 12 and power cord are provided on the adjacent side. High-precision scanning ends 2 are hinged at both ends of the handle 1. One end of the high-precision scanning end 2 is equipped with a laser emitter and a camera, and the other end of the high-precision scanning end 2 is connected to a device line 10. The handle 1 and the high-precision scanning end 2 are electrically connected to an external power supply and a computer device. Stepper screw motors 3 are fixed near both ends on one side of the handle 1. The two stepper screw motors 3 are of the same model and the initial position of the screw body 4 is the same, so as to synchronously adjust the rotation angle of the two high-precision scanning ends 2. The screw body 4 is rotatably threaded inside the stepper screw motor 3. A hollow area 1.1 is opened inside the handle 1 at the screw body 4 to reserve running space for the screw body 4.

[0021] Combined with appendix Figure 2 , 3 It can be seen that a connecting block 5 is rotatably provided at one end of the lead screw body 4, a connecting seat 6 is fixed at one end of the connecting block 5, and a hinge seat 7 is fixed on the side of one end of the high-precision scanning end 2. A connecting plate 8 and a connecting plate 9 are respectively hinged to the sides of the hinge seat 7 and the connecting seat 6, so that the high-precision scanning end 2 can be driven to swing through the connecting block 5.

[0022] The working principle of this application is as follows: When performing 3D real-scene scanning, a pair of high-precision scanning ends 2 can be kept at a specific angle for scanning. After the scanning is completed, a pair of stepper screw motors 3 can be started simultaneously to drive the pair of high-precision scanning ends 2 to adjust the angle. Then the workpiece is scanned again to rebuild the model, so as to eliminate inaccurate size data and improve scanning accuracy. Furthermore, by increasing the included angle between the pair of high-precision scanning ends 2, larger workpieces can also be scanned.

[0023] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A high-precision scanning head structure for a 3D laser scanner, comprising a handle (1) and high-precision scanning ends (2) at both ends of the handle (1), characterized in that: The handle (1) is fixed with a stepper screw motor (3) near both ends on one side. The stepper screw motor (3) has a screw body (4) with a threaded rotation inside. The handle (1) has a hollow area (1.1) at the screw body (4). A connecting block (5) is rotatably provided at one end of the screw body (4). A connecting seat (6) is fixed at one end of the connecting block (5). A hinge seat (7) is fixed on one side of the high-precision scanning end (2). A connecting plate one (8) and a connecting plate two (9) are respectively hinged to the hinge seat (7) and the connecting seat (6). The edge of the other end of the high-precision scanning end (2) is hinged to one edge of the handle (1).

2. The high-precision scanning head structure of a 3D laser scanner according to claim 1, characterized in that: The high-precision scanning end (2) is equipped with a laser emitter and a camera at one end, and a device line (10) is connected to the other end of the high-precision scanning end (2).

3. The high-precision scanning head structure of a 3D laser scanner according to claim 1, characterized in that: An adjustment button (11) is embedded on one side of the handle (1), and a start button (12) and a power cord are provided on the adjacent side.

4. The high-precision scanning head structure of a 3D laser scanner according to claim 1, characterized in that: The two stepper screw motors (3) are of the same model and the screw body (4) has the same initial position.

5. The high-precision scanning head structure of a 3D laser scanner according to claim 1, characterized in that: Both the handle (1) and the high-precision scanning end (2) are electrically connected to an external power source and computer equipment.

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