Scanning structure of three-dimensional laser scanner

Abstract

The utility model relates to the technical field of laser scanners, and discloses a scanning structure of a three-dimensional laser scanner, which comprises a base, a motor, a fixed support, a first balancing weight, a second balancing weight and a scanning mirror assembly. The base is fixedly arranged at the first end of the motor, and a rotating shaft is coaxially arranged in the motor; the first end of the rotating shaft penetrates through the base, the fixing support is fixed to the end of the rotating shaft, the fixing support is arranged close to the base, the first balancing weight is fixedly arranged on the fixing support, and the scanning mirror assembly is fixedly arranged at the end, away from the fixing support, of the first balancing weight. The first balancing weight is fixedly arranged at the first end of the rotating shaft, the second balancing weight is fixedly arranged at the second end of the rotating shaft, a first balancing weight piece is detachably arranged on the first balancing weight, and a second balancing weight piece is detachably arranged on the second balancing weight; the beneficial effects of the utility model are that the overall design of the scanning structure is simplified, the scanning structure is convenient to disassemble and assemble, and the dynamic balance of the motor can be adjusted.

Description

Technical Field

[0001] The utility model relates to the technical field of laser scanners, in particular to a scanning structure of a three-dimensional laser scanner. Background Art

[0002] The 3D laser measurement scanner is an optoelectronic integrated system that integrates laser scanner (Scanner), global positioning system (GPS), inertial navigation system (INS) and high-resolution digital camera technologies. It is used to obtain laser point cloud data and generate accurate digital elevation model (DEM) and digital surface model (DSM), while obtaining object DOM (digital orthophoto) information. By processing the laser point cloud data, a real 3D scene map can be obtained.

[0003] The scanning structure is an important component of the 3D laser scanner. Its function is to drive the scanning mirror to rotate through the motor, project the laser onto the ground object target, and reflect the laser reflected by the ground object target into the optical system. In the prior art, the overall structure of the scanning structure is relatively complex, and it is inconvenient to disassemble and assemble. In addition, when the motor drives the scanning mirror to rotate, the electrolysis does not set a counterweight structure, and the counterweight at the output end of the motor remains unchanged, and the dynamic balance of the motor cannot be adjusted. Utility Model Content

[0004] The purpose of the utility model is to provide a scanning structure of a three-dimensional laser scanner, simplify the overall design of the scanning structure, facilitate disassembly and assembly, and adjust the dynamic balance of the motor.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a scanning structure of a three-dimensional laser scanner, including a base, a motor, a fixing bracket, a first counterweight block, a second counterweight block, and a scanning mirror assembly;

[0006] The base is fixedly arranged at the first end of the motor, a rotating shaft is coaxially arranged inside the motor, and the rotating shaft passes through both ends of the motor;

[0007] The first end of the rotating shaft passes through the base and the fixing bracket is fixed to the end thereof, the fixing bracket is arranged close to the base, the first counterweight is fixedly arranged on the fixing bracket, and the scanning mirror assembly is fixedly arranged on the end of the first counterweight away from the fixing bracket;

[0008] The second end of the rotating shaft is fixedly provided with the second counterweight block, the first counterweight block is detachably provided with a first counterweight piece, and the second counterweight block is detachably provided with a second counterweight piece;

[0009] The motor is actuated to drive the rotating shaft to rotate, so that the fixed bracket, the first counterweight, the scanning mirror assembly and the second counterweight rotate synchronously.

[0010] Furthermore, the first counterweight block is evenly distributed in a ring with first screw holes for mounting the first counterweight piece, and the second counterweight block is evenly distributed in a ring with second screw holes for mounting the second counterweight piece.

[0011] Furthermore, the first counterweight is hollow inside and is provided with a mounting cavity at one end away from the fixing bracket, and the scanning mirror assembly is fixedly provided in the mounting cavity.

[0012] Furthermore, the scanning mirror assembly includes a mounting frame and a scanning mirror, the mounting frame is located in the mounting cavity and one end of the mounting frame is in contact with the first counterweight block, the other end of the mounting frame is in contact with the end face of the scanning mirror, and the end face of the scanning mirror is arranged at a certain angle to the axis of the rotating shaft.

[0013] Furthermore, the angle ranges from 30° to 60°.

[0014] Furthermore, the scanning mirror and the mounting frame are fixed by gluing.

[0015] Furthermore, the second end sleeve of the rotating shaft is provided with a flange, the outer wall of the flange is circumferentially evenly distributed with third screw holes, the inner thread of the third screw hole is connected with a first screw for fixing the rotating shaft, and the flange and the second counterweight block are connected with fixing screws.

[0016] Furthermore, a limiting groove for mounting and positioning the flange is provided at one end of the second counterweight block close to the flange.

[0017] Furthermore, an annular protrusion is provided at one end of the fixing bracket close to the first counterweight block, a fourth screw hole is provided on the side wall of the annular protrusion, and a second screw for fixing to the rotating shaft is threadedly connected to the inner thread of the fourth screw hole.

[0018] Furthermore, a mounting hole is provided on the base.

[0019] Compared with the prior art, the scanning structure of a three-dimensional laser scanner in an embodiment of the utility model has the following beneficial effects: it includes a base, a motor, a fixed bracket, a first counterweight block, a second counterweight block, and a scanning mirror assembly, the overall structure is simple, the number of parts is small, and it is easy to disassemble and assemble; in addition, a first counterweight block is provided at the first end of the rotating shaft, and a second counterweight block is provided at the second end of the rotating shaft, a first counterweight piece is detachably provided on the first counterweight block, and a second counterweight piece is detachably provided on the second counterweight block, and the dynamic balance of the motor can be adjusted by adjusting the number of the first counterweight piece and the second counterweight piece to increase the motor speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1It is a schematic diagram of the scanning structure of the three-dimensional laser scanner of the embodiment of the utility model;

[0021] Figure 2 is a cross-sectional view of a scanning structure of a three-dimensional laser scanner according to an embodiment of the utility model;

[0022] Figure 3 It is an exploded view of the parts of the scanning structure of the three-dimensional laser scanner according to the embodiment of the utility model.

[0023] In the figure, 1, base; 11, mounting hole; 2, motor; 21, rotating shaft; 3, fixing bracket; 31, annular protrusion; 32, second screw; 4, first counterweight; 41, mounting cavity; 42, first screw hole; 5, second counterweight; 51, second screw hole; 52, limiting groove; 6, scanning mirror assembly; 61, mounting bracket; 62, scanning mirror; 7, flange; 71, first screw; 8, fixing screw. DETAILED DESCRIPTION

[0024] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0025] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "inside", "outside", etc. used in the present invention to indicate the orientation or positional relationship are based on the positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred devices and elements must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0026] In the description of the present invention, it should be understood that the terms "first", "second", etc. are used in the present invention to describe various information, but these information should not be limited to these terms, and these terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information.

[0027] like Figure 1As shown, a scanning structure of a three-dimensional scanner of a preferred embodiment of the utility model includes a base 1, a motor 2, a fixed bracket 3, a first counterweight 4, a second counterweight 5, and a scanning mirror assembly 6; wherein, the base 1 is used as a connecting piece connected to an external structure. In order to facilitate the connection between the scanning structure as a whole and the outside, a mounting hole 11 is provided on the base 1, which can be directly fixedly connected to the external structure by screws. In order to facilitate the description of the installation position, specifically, the first end of the motor 2 is fixedly provided with the base 1, and a rotating shaft 21 is coaxially provided inside the motor 2. The rotating shaft 21 passes through both ends of the motor 2, that is, the rotating shaft 21 serves as the output shaft of the motor 2. In order to facilitate the rotating shaft 21 to drive the scanning mirror assembly 6 to rotate, the first end of the rotating shaft 21 passes through the base 1 and a fixed bracket 3 is fixed at the end. The fixed bracket 3 is arranged close to the base 1, and a first counterweight 4 is fixedly provided on the fixed bracket 3. The scanning mirror assembly 6 is fixedly provided at the end of the first counterweight 4 away from the fixed bracket 3. In order to facilitate the adjustment of the dynamic balance at both ends of the motor 2, a second counterweight block 5 is fixedly provided at the second end of the rotating shaft 21, a first counterweight piece is detachably provided on the first counterweight block 4, and a second counterweight piece is detachably provided on the second counterweight block 5. By adjusting the number of the first counterweight piece and the second counterweight piece, the counterweight at both ends of the motor 2 is adjusted, thereby adjusting the dynamic balance of the motor 2, increasing the speed of the motor 2, and thus improving the scanning efficiency. The specific working process is: when the motor 2 is in motion, it can drive the rotating shaft 21 to rotate, so that the fixed bracket 3, the first counterweight block 4, the scanning mirror assembly 6 and the second counterweight block 5 rotate synchronously.

[0028] Furthermore, in order to facilitate the disassembly and assembly of the first counterweight and the second counterweight, in this embodiment, the first counterweight and the second counterweight are both screwed. Figure 1 , Figure 3 The first counterweight block 4 is provided with first screw holes 42 for mounting the first counterweight, and the second counterweight block 5 is provided with second screw holes 51 for mounting the second counterweight. During the dynamic balance adjustment process of the motor 2, the number of the first counterweight and the second counterweight is adjusted respectively, so that the motor 2 drives the scanning mirror to rotate at a faster speed, thereby improving the scanning efficiency.

[0029] Furthermore, in this embodiment, in order to facilitate the installation and positioning of the scanning mirror assembly, a mounting cavity 41 is provided at one end of the first counterweight 4 which is hollow inside and away from the fixed bracket 3 , and the scanning mirror assembly is fixed in the mounting cavity 41 .

[0030] Furthermore, in order to simplify the overall structure of the scanning mirror 62, the scanning mirror assembly includes a mounting frame 61, a scanning mirror 62 and a scanning mirror 62 module, wherein the scanning mirror 62 module is an electronic component, which is an essential electronic component in the scanning structure, so its working principle is not described in detail, and the scanning mirror module is mounted on the fixed bracket 3, and its structure is not shown in the figure. In order to facilitate the installation and positioning of the mounting frame 61, the mounting frame 61 is located in the mounting cavity 41 and one end is attached to the first counterweight 4, and the other end of the mounting frame 61 is attached to the end face of the scanning mirror, and the end face of the scanning mirror 62 is set at a certain angle to the axis of the rotating shaft 21. The value range of the angle is 30°-60°. Preferably, in this embodiment, the value of the angle is 45°, and the size of the angle can be appropriately adjusted according to the actual scanning working conditions. Furthermore, in order to facilitate the fixation between the scanning mirror 62 and the mounting frame 61, the scanning mirror 62 and the mounting frame 61 are fixed by gluing, specifically, they can be fixed by resin glue.

[0031] Further, in order to facilitate the installation of the rotating shaft 21 and the second counterweight 5, in this embodiment, refer to Figures 1 to 3 A flange 7 is sleeved on the second end of the rotating shaft 21, and third screw holes are evenly distributed on the outer wall of the flange 7 in the circumferential direction. The third screw holes are threadedly connected with first screws 71 for fixing the rotating shaft 21. At the same time, in order to facilitate the connection between the flange 7 and the second counterweight 5, the flange 7 and the second counterweight 5 are connected by fixing screws 8. Furthermore, in order to facilitate the position limiting of the second counterweight 5 and the flange 7 during installation, a position limiting groove 52 is provided at one end of the second counterweight 5 close to the flange 7.

[0032] Further, in some embodiments, in order to facilitate the quick disassembly and assembly between the fixing bracket 3 and the rotating shaft 21, refer to Figure 2 , Figure 3 An annular protrusion 31 is provided at one end of the fixing bracket 3 close to the first counterweight 4 , and a fourth screw hole is provided on the side wall of the annular protrusion 31 , and a second screw 32 for fixing to the rotating shaft 21 is threadedly connected in the fourth screw hole.

[0033] In summary, the embodiment of the utility model provides a scanning structure of a three-dimensional laser scanner, including a base 1, a motor 2, a fixed bracket 3, a first counterweight block 4, a second counterweight block 5, and a scanning mirror assembly 6. The overall structure is simple, the number of parts is small, and it is easy to disassemble and assemble; in addition, a first counterweight block 4 is provided at the first end of the rotating shaft 21, and a second counterweight block 5 is provided at the second end of the rotating shaft 21. A first counterweight piece is detachably provided on the first counterweight block 4, and a second counterweight piece is detachably provided on the second counterweight block 5. By adjusting the number of the first counterweight piece and the second counterweight piece, the dynamic balance of the motor 2 can be adjusted to increase the rotation speed of the motor 2.

[0034] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A scanning structure of a three-dimensional laser scanner, characterized in that: It includes a base, a motor, a fixing bracket, a first counterweight, a second counterweight, and a scanning mirror assembly; The base is fixedly arranged at the first end of the motor, a rotating shaft is coaxially arranged inside the motor, and the rotating shaft passes through both ends of the motor; The first end of the rotating shaft passes through the base and the fixing bracket is fixed to the end thereof, the fixing bracket is arranged close to the base, the first counterweight block is fixedly arranged on the fixing bracket, and the scanning mirror assembly is fixedly arranged on the end of the first counterweight block away from the fixing bracket; The second end of the rotating shaft is fixedly provided with the second counterweight block, the first counterweight block is detachably provided with a first counterweight piece, and the second counterweight block is detachably provided with a second counterweight piece; The motor is actuated to drive the rotating shaft to rotate, so that the fixed bracket, the first counterweight, the scanning mirror assembly and the second counterweight rotate synchronously.

2. The scanning structure of the three-dimensional laser scanner according to claim 1, characterized in that: The first counterweight block is evenly distributed in a ring with first screw holes for mounting the first counterweight piece, and the second counterweight block is evenly distributed in a ring with second screw holes for mounting the second counterweight piece.

3. The scanning structure of the three-dimensional laser scanner according to claim 1, characterized in that: The first counterweight is hollow inside and has an installation cavity at one end away from the fixing bracket, and the scanning mirror assembly is arranged in the installation cavity.

4. The scanning structure of the three-dimensional laser scanner as claimed in claim 3, characterized in that: The scanning mirror assembly includes a mounting frame and a scanning mirror. The mounting frame is located in the mounting cavity and one end of the mounting frame is in contact with the first counterweight block. The other end of the mounting frame is in contact with the end face of the scanning mirror. The end face of the scanning mirror is arranged at a certain angle to the axis of the rotating shaft.

5. The scanning structure of the three-dimensional laser scanner according to claim 4, characterized in that: The angle has a value range of 30°-60°.

6. The scanning structure of the three-dimensional laser scanner according to claim 4, characterized in that: The scanning mirror and the mounting frame are fixed by gluing.

7. The scanning structure of the three-dimensional laser scanner according to claim 1, characterized in that: The second end sleeve of the rotating shaft is provided with a flange, the outer wall of the flange is circumferentially evenly provided with third screw holes, the inner thread of the third screw hole is connected with a first screw for fixing the rotating shaft, and the flange and the second counterweight block are connected by fixing screws.

8. The scanning structure of the three-dimensional laser scanner according to claim 7, characterized in that: A limiting groove for mounting and positioning the flange is provided at one end of the second counterweight block close to the flange.

9. The scanning structure of the three-dimensional laser scanner according to claim 1, characterized in that: An annular protrusion is provided at one end of the fixing bracket close to the first counterweight block, a fourth screw hole is provided on the side wall of the annular protrusion, and a second screw for fixing to the rotating shaft is threadedly connected to the inner thread of the fourth screw hole.

10. The scanning structure of the three-dimensional laser scanner according to claim 1, characterized in that: The base is provided with a mounting hole.

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