Three-dimensional laser scanning target

Abstract

The utility model discloses a three-dimensional laser scanning target, which comprises a support, two supporting arms, target frames and replaceable target cards, wherein the two supporting arms are hinged to the upper end of the support and are oppositely arranged; the target frames are hinged to the end parts of the supporting arms; the replaceable target cards are inserted into at least one target frame and are parallel to the target frames; the rotating angles of the two supporting arms relative to the support are adjusted so that the two target frames and the target cards on the target frames can be perpendicular to the ground, or one target frame and the target card on the target frame can be perpendicular to the ground, and the other target frame and the target card on the target frame can be parallel to the ground. According to the utility model, the target can be conveniently used, the splicing rate of three-dimensional laser scanning is enhanced, a target sticker does not need to be adhered to a building wall body, and pollution and damage to the wall surface are avoided.

Description

Technical Field

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

[0002] 3D laser scanning technology is widely used. Some 3D laser scanners can realize partial automatic target splicing. However, for buildings or objects with high similarity and no obvious feature points, confusion often occurs during splicing. Pasting targets can enhance the recognition rate and improve the accuracy of automatic splicing. However, most of the targets are flat structures. Most of them are printed paper pasted on the wall. However, for protected buildings, the adhesive used to paste paper can easily contaminate and damage the wall of the protected building, especially those wooden walls, and multiple sheets need to be pasted. At the same time, for large buildings, the workload of manual pasting is large. Utility Model Content

[0003] The purpose of the utility model is to provide a three-dimensional laser scanning target to solve the problem that target stickers are difficult to remove after being pasted on buildings, easily pollute and damage the walls of protected buildings, occupy a large surface area of ​​the building, and require a large pasting workload.

[0004] In order to solve the above technical problems, the technical solution provided by the utility model is: a three-dimensional laser scanning target, including a bracket, two support arms hinged at the upper end of the bracket and arranged opposite to each other, a target frame hinged at the end of each support arm, and a replaceable target card inserted into at least one of the target frames and parallel to the target frame; adjusting the rotation angle of the two support arms relative to the bracket so that the two target frames and the target cards thereon are both perpendicular to the ground or one target frame and the target card thereon are perpendicular to the ground, and the other target frame and the target card thereon are parallel to the ground.

[0005] Furthermore, in the three-dimensional laser scanning target provided by the utility model, the bracket is an adjustment bracket.

[0006] Furthermore, in the three-dimensional laser scanning target provided by the utility model, the bracket is provided with at least three legs.

[0007] Furthermore, in the three-dimensional laser scanning target provided by the utility model, the legs are hinged on the bracket, the legs can be folded and stored on the bracket, and the legs can be unfolded relative to the bracket to support on the ground.

[0008] Furthermore, in the three-dimensional laser scanning target provided by the utility model, the support arm is a multi-section folding arm, and adjacent sections of the folding arms are connected by a hinge axis. When the folding arms are folded, the target frame can be folded and stored close to the bracket, and when the folding arms are in an unfolded state, the target frame can be moved away from the bracket.

[0009] Furthermore, in the three-dimensional laser scanning target provided by the utility model, the target frame is hinged to the support arm through a hinge seat.

[0010] Furthermore, in the three-dimensional laser scanning target provided by the utility model, the upper and lower sides of the target frame are provided with card slots.

[0011] Furthermore, the three-dimensional laser scanning target provided by the utility model has a target frame that is a field-shaped frame.

[0012] Furthermore, in the three-dimensional laser scanning target provided by the utility model, the target frame is a plate.

[0013] Furthermore, in the three-dimensional laser scanning target provided by the utility model, the left and right lower sides of the target frame are provided with card slots, or the upper and lower left sides of the target frame are provided with card slots, or the upper and lower right sides of the target frame are provided with card slots.

[0014] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0015] The three-dimensional laser scanning target provided by the embodiment of the utility model is set on the ground through a bracket when in use, and the angle of the target frame and the target card thereon is adjusted through the support arm, and the target card is inserted into the target frame. By placing the three-dimensional laser scanning target in the measurement area, the three-dimensional laser scanner can lock the three-dimensional laser scanning target to determine its coordinate system and facing direction. During the scanning process, the three-dimensional laser scanner will scan the points near the three-dimensional laser scanning target and its own surface features, and then generate a high-precision three-dimensional model by calculating the relative positions of various surfaces such as walls, roofs and the ground, thereby improving the precision and accuracy of the three-dimensional scanning. When the next measurement area is carried out, the position of the three-dimensional laser scanning target is moved and the target card is replaced on the target frame, so that the use of the target is facilitated, so that the scanned three-dimensional model is spliced, the splicing rate of the three-dimensional laser scanning is enhanced, and the problem of using target stickers to stick on the building wall, which makes it difficult to remove on the building after scanning and use, and easily pollutes and damages the wall surface of the protective building, and reduces the problem of pasting workload. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The three-dimensional structure diagram of the two target frames of the three-dimensional laser scanning target are both perpendicular to the ground;

[0017] Figure 2 A schematic diagram of a three-dimensional structure in which one target frame of a three-dimensional laser scanning target is perpendicular to the ground and the other target frame is parallel to the ground;

[0018] Figure 3 It is a schematic diagram of the three-dimensional structure of the support arm and the target frame in a folded and stored state;

[0019] Figure 4 is a side view structural schematic diagram of the support arm and the target frame in a folded and stored state;

[0020] Figure 5 It is a schematic diagram of the side view structure of a three-dimensional laser scanning target without a target card inserted;

[0021] Figure 6 It is a schematic diagram of the local structure of the bracket, support arm and target frame at the hinge node;

[0022] Figure 7 This is a schematic diagram of the front structure of the target card;

[0023] As shown in the figure:

[0024] 100. 3D laser scanning target;

[0025] 110, bracket, 111, leg;

[0026] 120, support arm, 121, articulated seat, 122, articulated shaft;

[0027] 130, target frame, 131, card slot;

[0028] 140. Target card. DETAILED DESCRIPTION

[0029] The utility model is described in detail below in conjunction with the accompanying drawings: According to the following description, the advantages and features of the utility model will be more clearly understood. It should be noted that the accompanying drawings are all in a very simplified form and are not in precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the utility model.

[0030] Please refer to Figures 1 to 7 The embodiment of the utility model provides a three-dimensional laser scanning target 100, including a bracket 110, two support arms 120 hinged on the upper end of the bracket 110 and arranged opposite to each other, a target frame 130 hinged on the end of each support arm 120, and a replaceable target card 140 inserted in at least one of the target frames 130 and parallel to the target frame 130. The rotation angle of the two support arms 120 relative to the bracket 110 can be adjusted so that the two target frames 130 and the target cards 140 thereon are perpendicular to the ground or one target frame 130 and the target card 140 thereon are perpendicular to the ground, and the other target frame 130 and the target card 140 thereon are parallel to the ground. The target frame 130 can be hinged to the support arm 120 through a hinge seat 121.

[0031] The three-dimensional laser scanning target 100 provided by the embodiment of the utility model is set on the ground through the bracket 110 when in use, and the angle of the target frame 130 and the target card 140 thereon is adjusted through the support arm 120, and the target card 140 is inserted into the target frame 130. By placing the three-dimensional laser scanning target 100 in the measurement area, the three-dimensional laser scanner can lock the three-dimensional laser scanning target 100 to determine its coordinate system and facing direction. During the scanning process, the three-dimensional laser scanner scans the points near the three-dimensional laser scanning target 100 and its own surface features, and then generates a high-precision three-dimensional model by calculating the relative positions of various surfaces such as walls, roofs and the ground, thereby improving the precision and accuracy of the three-dimensional scanning. When the next measurement area is measured, the scanned three-dimensional model is spliced ​​by moving the position of the three-dimensional laser scanning target 100 and replacing the target card 140 on the target frame 130, thereby enhancing the splicing rate of the three-dimensional laser scanning, avoiding the problem of using target stickers to stick on the building walls, which makes it difficult to remove them from the building after scanning, and easily contaminates and damages the wall surface of the protected building, and reducing the workload of pasting.

[0032] Please refer to Figures 1 to 5 In order to adjust the elevation of the target card 140, the three-dimensional laser scanning target 100 provided by the embodiment of the utility model, the bracket 110 can be an adjustable bracket 110 such as a telescopic bracket.

[0033] Please refer to Figures 1 to 5 In order to improve the stability of the three-dimensional laser scanning target 100 set on the ground, the three-dimensional laser scanning target 100 provided by the embodiment of the utility model has at least three legs 111 provided on the support 110. In order to facilitate transportation, the legs 111 are hinged on the support 110, the legs 111 can be folded and stored on the support 110, and the legs 111 can be unfolded relative to the support 110 to support on the ground. When the legs 111 are in the folded storage state, the three-dimensional laser scanning target 100 is convenient to transport.

[0034] Please refer to Figures 1 to 4 and Figure 6 In order to fold the three-dimensional laser scanning target 100 for easy transportation, the three-dimensional laser scanning target 100 provided in the embodiment of the utility model has a support arm 120 that is a multi-section folding arm, and adjacent sections of the folding arms are connected by a hinge shaft 122. When the folding arm is folded, the target frame 130 can be folded and stored close to the bracket 110, and when the folding arm is in an unfolded state, the target frame 130 can be moved away from the bracket 110.

[0035] Please refer to Figures 1 to 4 and Figure 6In order to facilitate the replacement of the target card 140 , the three-dimensional laser scanning target 100 provided by the embodiment of the utility model has card slots 131 disposed on the upper and lower sides of the target frame 130 .

[0036] Please refer to Figure 1 , Figure 3 and Figure 5 In order to reduce cost and weight, the three-dimensional laser scanning target 100 provided in the embodiment of the utility model has the target frame 130 being a field-shaped frame.

[0037] In order to improve the flatness of the target card 140 , the three-dimensional laser scanning target 100 provided by the embodiment of the utility model has the target frame 130 being a plate.

[0038] In order to improve the stability of the target card 140 inserted into the target frame 130 and prevent it from displacement, the three-dimensional laser scanning target 100 provided by the embodiment of the utility model has a card slot 131 disposed on the left and right lower sides of the target frame 130, or a card slot 131 disposed on the upper and lower left sides of the target frame 130, or a card slot 131 disposed on the upper and lower right sides of the target frame 130. That is, the target card 140 is limited by the card slots 131 on three sides.

[0039] The three-dimensional laser scanning target 100 provided in the embodiment of the utility model can be set at a predetermined height on the ground using a bracket 110. The bracket 110 is moved during the scanning process to change the spatial state and pattern shape of the target card 140, thereby realizing automatic stitching of the point cloud. The same building or other object in the scanned point cloud can be identified through two stations, and automatic registration and fitting are performed to achieve high-precision stitching.

[0040] The three-dimensional laser scanning target 100 provided in the embodiment of the utility model can be made of aluminum alloy material, which is light in weight and easy to carry and transport.

[0041] The three-dimensional laser scanning target 100 provided in the embodiment of the utility model realizes the splicing of the scanning model by moving the position of the target 100, without the need to continuously stick target stickers on the wall, and there is no pollution or damage to the wall of the historical protected building.

[0042] The three-dimensional laser scanning target 100 provided in the embodiment of the utility model can be recycled and reused, and has the effect of energy saving and environmental protection.

[0043] The present utility model is not limited to the above-mentioned specific implementation modes. Obviously, the above-mentioned embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the described embodiments of the present utility model belong to the scope of protection of the present utility model. Those skilled in the art can make other levels of modifications and changes to the present utility model. In this way, if these modifications and changes of the present utility model fall within the scope of the claims of the present utility model, the present utility model is also intended to include these changes and changes.

Claims

1. A three-dimensional laser scanning target, characterized in that: The device comprises a bracket, two support arms hinged at the upper end of the bracket and arranged opposite to each other, a target frame hinged at the end of each support arm, and a replaceable target card inserted into at least one of the target frames and parallel to the target frame; the rotation angle of the two support arms relative to the bracket is adjusted so that the two target frames and the target cards thereon are perpendicular to the ground or one target frame and the target card thereon are perpendicular to the ground and the other target frame and the target card thereon are parallel to the ground.

2. The three-dimensional laser scanning target according to claim 1, characterized in that: The bracket is an adjustable bracket.

3. The three-dimensional laser scanning target according to claim 1 or 2, characterized in that: The support is provided with at least three legs.

4. The three-dimensional laser scanning target according to claim 3, characterized in that: The legs are hinged to the bracket, the legs can be folded and stored on the bracket, and the legs can be unfolded relative to the bracket to be supported on the ground.

5. The three-dimensional laser scanning target according to claim 1, characterized in that: The support arm is a multi-section folding arm, and adjacent sections of the folding arms are connected by a hinge shaft. When the folding arms are folded, the target frame can be folded and stored close to the bracket, and when the folding arms are in an unfolded state, the target frame can be moved away from the bracket.

6. The three-dimensional laser scanning target according to claim 1, characterized in that: The target frame is hinged to the support arm through a hinge seat.

7. The three-dimensional laser scanning target according to claim 1, characterized in that: The upper and lower sides of the target frame are provided with card slots.

8. The three-dimensional laser scanning target according to claim 1 or 7, characterized in that: The target frame is a field-shaped frame.

9. The three-dimensional laser scanning target according to claim 1 or 7, characterized in that: The target frame is a plate body.

10. The three-dimensional laser scanning target according to claim 1, characterized in that: The left and right lower sides of the target frame are provided with card slots, or the upper and lower left sides of the target frame are provided with card slots, or the upper and lower right sides of the target frame are provided with card slots.

Images