Double-layer planar laser target

Abstract

The utility model provides a double-layer planar laser target, and belongs to the technical field of targets. The double-layer plane laser target comprises a first target disc, a second target disc and a fixing rod. The first target disc is arranged in the horizontal direction; the second target disc is arranged in the horizontal direction and located below the first target disc. A certain distance is formed between the second target disc and the first target disc in the vertical direction; the fixing rod is arranged in the vertical direction, the upper end of the fixing rod is connected with the first target disc, and the fixing rod penetrates through the second target disc; the lower ends of the fixing rods are inserted into the ground. The double-layer planar laser target is simple in overall structure and high in target point elevation extraction efficiency.

Description

Technical Field

[0001] The utility model belongs to the technical field of targets, and particularly relates to a double-layer planar laser target. Background Art

[0002] During the process of an airborne lidar system acquiring point cloud data, affected by factors such as the accuracy of the device itself and environmental factors, the acquired point cloud data inevitably has noise. Due to the simple structure of the traditional single-layer planar laser target, the discrete degree of the target point cloud data acquired by the airborne lidar system is very large, and it cannot accurately reflect the height where the target surface is located. Therefore, complex algorithms and methods are required to process the target point cloud in order to accurately extract the elevation, wasting a lot of time and energy. Content of the Utility Model

[0003] The utility model provides a double-layer planar laser target to solve the problem of complex elevation extraction of the target point cloud in the prior art.

[0004] A double-layer planar laser target provided by the utility model includes:

[0005] A first target disk, which is arranged horizontally;

[0006] A second target disk, which is arranged horizontally and is located below the first target disk; there is a certain distance between the second target disk and the first target disk in the vertical direction;

[0007] A fixing rod, which is arranged vertically, the upper end of the fixing rod is connected to the first target disk, and the fixing rod passes through the second target disk;

[0008] When measurement is required, the lower end of the fixing rod is inserted into the ground.

[0009] Preferably, the first target disk is provided with a plurality of through holes, so that part of the laser projected onto the first target disk is projected onto the second target disk through the through holes.

[0010] Preferably, the first target disk and the second target disk are respectively in a disk shape.

[0011] Preferably, the centers of the first target disk and the second target disk are located on the axis of the fixing rod.

[0012] Preferably, the upper surface of the first target disk is divided into several parts, and adjacent parts are respectively designed with different colors; the surface of the second target disk facing the first target disk is also divided into several parts, and adjacent parts are respectively designed with different colors.

[0013] Preferably, the outer diameter dimensions of the first target disk and the second target disk are the same, and the first target disk and the second target disk are each divided into four parts, and the four parts of the first target disk and the four parts of the second target disk are evenly distributed in the circumferential direction; two relatively arranged parts of the first target disk are coated with a strong reflective coating, and two relatively arranged parts of the second target disk are also coated with a strong reflective coating.

[0014] Preferably, the fixing rod includes a first connecting rod and a second connecting rod. The upper end of the first connecting rod is fixedly connected to the first target disk, the lower end of the first connecting rod is fixedly connected to the second target disk, the upper end of the second connecting rod is connected to the second target disk and / or the first connecting rod, and the lower end of the second connecting rod is inserted into the ground.

[0015] Preferably, a connecting cavity is provided inside the first connecting rod. The connecting cavity is provided with a connecting cavity opening facing downward. The second target disk is provided with a target disk opening corresponding to the connecting cavity opening. The upper end of the second connecting rod is arranged in the connecting cavity through the connecting cavity opening so that the second connecting rod is connected to the first connecting rod.

[0016] Preferably, the first connecting rod and the second connecting rod are arranged coaxially; the inner wall of the connecting cavity is provided with internal threads, and the upper end of the second connecting rod is provided with external threads. The external threads are matched with the internal threads so that the second connecting rod is threadedly connected to the inside of the connecting cavity.

[0017] Preferably, the lower end of the second connecting rod is tapered to facilitate the insertion of the second connecting rod into the ground.

[0018] Compared with the prior art, the advantages and positive effects of the present utility model are as follows:

[0019] The double-layer planar target provided by the present utility model has a simple overall structure and high efficiency in extracting the elevation of the target points; the double-layer planar target includes an upper and a lower target disk of a first target disk and a second target disk, and the first target disk is provided with a through hole. During the process of collecting data by the airborne lidar system, the point cloud data of the first target disk and the second target disk can be obtained simultaneously, increasing the complexity of the target point cloud data; during the process of extracting the elevation of the target point cloud, only all the point cloud data between the first target disk and the second target disk needs to be selected, the elevation of these points is extracted, and the average value is obtained, which is the elevation value of the target, avoiding the complex point cloud processing process required for traditional single-layer target data and greatly improving the efficiency of extracting the elevation of the target points. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of the double-layer planar laser target of the present utility model;

[0021] Figure 2 is a schematic structural diagram of the first target disk in the double-layer planar laser target of the present utility model;

[0022] Figure 3 This is a schematic structural view of the second target disk in the double-layer planar laser target of the present utility model;

[0023] Figure 4 This is a schematic structural view of the first connecting rod in the double-layer planar laser target of the present utility model;

[0024] Figure 5 This is a schematic structural view of the second connecting rod in the double-layer planar laser target of the present utility model.

[0025] In the figure: 1, the first target disk; 2, the second target disk; 3, the fixed rod; 11, the through hole; 31, the first connecting rod; 32, the second connecting rod; 311, the connecting cavity. Specific embodiments

[0026] Next, the present utility model will be specifically described by way of exemplary embodiments. However, it should be understood that without further narration, the elements, structures, and features in one embodiment can also be beneficially combined into other embodiments.

[0027] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "inner", "outer", "upper", "lower", "front", "rear", etc. is based on the positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0028] See Figures 1 to 5 , a double-layer planar laser target, comprising a first target disk 1, a second target disk 2, and a fixed rod 3; the first target disk 1 is arranged horizontally; the second target disk 2 is arranged horizontally and is located below the first target disk 1; there is a certain distance between the second target disk 2 and the first target disk 1 in the vertical direction; the fixed rod 3 is arranged vertically, the upper end of the fixed rod 3 is connected to the first target disk 1, the fixed rod 3 passes through the second target disk 2; the lower end of the fixed rod 3 is inserted into the ground.

[0029] By designing the double-layer planar target to include an upper and lower two-layer structure of the first target disk 1 and the second target disk 2, so that the point cloud data of the first target disk 1 and the second target disk 2 can be obtained simultaneously during the process of the airborne lidar system collecting data, increasing the complexity of the target point cloud data.

[0030] Such as Figure 2As shown in the figure, the first target disk 1 is provided with a plurality of through holes 11, so that part of the laser projected onto the first target disk 1 is projected onto the second target disk 2 through the through holes 11, facilitating the acquisition of data of the second target disk 2. It should be noted that when the laser emitted by the airborne lidar system is projected onto the upper surface of the first target disk 1, part of the laser is reflected back to the airborne lidar system and collected by the airborne lidar system, and part of the laser is projected onto the second target disk 2 through the through holes 11 and then reflected back to the airborne lidar system and collected by the airborne lidar system.

[0031] In some embodiments, the diameter of the through hole 11 is 10 mm.

[0032] The first target disk 1 and the second target disk 2 are generally designed to be disk-shaped.

[0033] In some embodiments, the outer diameters of the first target disk 1 and the second target disk 2 are the same, and the outer diameters of the first target disk 1 and the second target disk 2 are 200 mm.

[0034] In some other embodiments, the thicknesses of the first target disk 1 and the second target disk 2 are the same, and the thicknesses of the first target disk 1 and the second target disk 2 are 10 mm.

[0035] In some other embodiments, the first target disk 1 and the second target disk 2 are respectively circular flat steel plates.

[0036] To prevent the fixing rod 3 from tilting after being inserted into the ground, the centers of the first target disk 1 and the second target disk 2 are located on the axis of the fixing rod 3, so that the fixing rod 3 is evenly stressed and the fixing rod 3 is prevented from tilting due to uneven stress.

[0037] The upper surface of the first target disk 1 is divided into several parts, and adjacent parts are respectively designed with different colors; the surface of the second target disk 2 facing the first target disk 1 is also divided into several parts, and adjacent parts are respectively designed with different colors.

[0038] In some embodiments, as Figure 2 shown, the outer diameter dimensions of the first target disk 1 and the second target disk 2 are the same and the first target disk 1 and the second target disk 2 are respectively divided into four parts, and the four parts of the first target disk 1 and the four parts of the second target disk 2 are evenly distributed around the circumferential direction; any two relatively arranged parts of the first target disk 1 are coated with a strong reflection coating, and any two relatively arranged parts of the second target disk 2 are also coated with a strong reflection coating.

[0039] As Figure 4 and Figure 5As shown in the figure, the fixed rod 3 includes a first connecting rod 31 and a second connecting rod 32. The upper end of the first connecting rod 31 is fixedly connected to the first target plate 1, and the lower end of the first connecting rod 31 is fixedly connected to the second target plate 2. The upper end of the second connecting rod 32 is connected to the second target plate 2 and / or the first connecting rod 31, and the lower end of the second connecting rod 32 is inserted into the ground.

[0040] By designing the fixed rod 3 as a split structure, it is convenient to transport and store the double-layer planar laser target.

[0041] In some embodiments, as Figure 4 shown, a connecting cavity 311 is provided inside the first connecting rod 31. The connecting cavity 311 is provided with an opening of the connecting cavity 311 arranged downward. The second target plate 2 is provided with a target plate opening corresponding to the opening of the connecting cavity 311. The upper end of the second connecting rod 32 is arranged in the connecting cavity 311 through the opening of the connecting cavity 311, so that the second connecting rod 32 is connected to the first connecting rod 31.

[0042] In some other embodiments, the first connecting rod 31 and the second connecting rod 32 are arranged coaxially; the inner wall of the connecting cavity 311 is provided with internal threads, and the upper end of the second connecting rod 32 is provided with external threads. The external threads are matched with the internal threads, so that the second connecting rod 32 is threadedly connected to the inside of the connecting cavity 311.

[0043] As Figure 5 shown, the lower end of the second connecting rod 32 is conical to facilitate the insertion of the second connecting rod 32 into the ground.

[0044] In some embodiments, the first connecting rod 31 is a cylindrical steel pipe with a diameter of 80 mm, a thickness of 2 mm, and a length of 50 mm; the second connecting rod 32 is a cylindrical steel pipe with a diameter of 80 mm, a thickness of 2 mm, and a length of 2000 mm.

[0045] When installing the above double-layer planar laser target, first embed the second fixed rod 3 into the ground at the point through a pile driver, and then threadedly connect the upper end of the second connecting rod 32 to the first connecting rod 31, so that the first target plate 1, the second target plate 2, the first connecting rod 31 and the second connecting rod 32 are connected to each other as a whole.

[0046] The above double-layer planar laser target is designed as an upper and lower two-layer structure including a first target disk 1 and a second target disk 2, so that the point cloud data of the first target disk 1 and the second target disk 2 can be obtained simultaneously during the process of the airborne lidar system collecting data, increasing the complexity of the target point cloud data; and the first target disk 1 is provided with through holes 11, and the point cloud data of the first target disk 1 and the second target disk 2 can be obtained simultaneously during the process of the airborne lidar system collecting data, increasing the complexity of the target point cloud data; during the process of extracting the elevation of the target point cloud, only all the point cloud data between the first target disk 1 and the second target disk 2 needs to be selected, the elevation of these points is extracted, and the average value is calculated, which is the elevation value of the target, avoiding the complex point cloud processing process required for the traditional single-layer target data, and greatly improving the efficiency of extracting the target point elevation.

[0047] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by those skilled in the art within the essence of the present invention should also fall within the protection scope of the present invention.

Claims

1. A double-layer planar laser target, characterized in that, Comprising: A first target disc, which is arranged horizontally; A second target disc, which is arranged horizontally and is located below the first target disc; there is a certain distance between the second target disc and the first target disc in the vertical direction; A fixed rod, which is arranged vertically, the upper end of the fixed rod is connected to the first target disc, and the fixed rod passes through the second target disc; the lower end of the fixed rod is inserted into the ground.

2. The double-layer planar laser target according to claim 1, wherein, The first target disc is provided with a plurality of through holes, so that part of the laser projected onto the first target disc is projected onto the second target disc through the through holes.

3. The double-layer planar laser target according to claim 1 or 2, wherein The first target disc and the second target disc are respectively in the shape of a disc.

4. The double-layer planar laser target according to claim 3, characterized in that, The centers of the first target disc and the second target disc are located on the axis of the fixed rod.

5. The double-layer planar laser target according to claim 3, wherein The upper surface of the first target disc is divided into several parts, and adjacent parts are designed with different colors; the surface of the second target disc facing the first target disc is also divided into several parts, and adjacent parts are designed with different colors.

6. The double-layer planar laser target according to claim 5, characterized in that, The outer diameter sizes of the first target disc and the second target disc are the same and the first target disc and the second target disc are respectively divided into four parts, and the four parts of the first target disc and the four parts of the second target disc are evenly distributed around the circumferential direction; any two relatively arranged parts of the first target disc are coated with a strong reflection coating, and any two relatively arranged parts of the second target disc are also coated with a strong reflection coating.

7. The double-layer planar laser target according to claim 1 or 2, characterized in that The fixed rod includes a first connecting rod and a second connecting rod, the upper end of the first connecting rod is fixedly connected to the first target disc, the lower end of the first connecting rod is fixedly connected to the second target disc, the upper end of the second connecting rod is connected to the second target disc and / or the first connecting rod, and the lower end of the second connecting rod is inserted into the ground.

8. The double-layer planar laser target according to claim 7, characterized in that, The interior of the first connecting rod is provided with a connecting cavity, the connecting cavity is provided with a downward-opening connecting cavity opening, the second target disc is provided with a target disc opening corresponding to the connecting cavity opening, and the upper end of the second connecting rod is arranged in the connecting cavity through the connecting cavity opening, so that the second connecting rod is connected to the first connecting rod.

9. The double-layer planar laser target according to claim 8, characterized in that, The first connecting rod and the second connecting rod are arranged coaxially; the inner wall of the connecting cavity is provided with internal threads, and the upper end of the second connecting rod is provided with external threads, and the external threads are matched with the internal threads, so that the second connecting rod is threadedly connected to the interior of the connecting cavity.

10. The double-layer planar laser target according to claim 7, characterized in that, The lower end of the second connecting rod is tapered to facilitate the insertion of the second connecting rod into the ground.

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