Foldable image control point non-planar spraying mold

Abstract

The utility model discloses a foldable image control point non-planar spraying mold, and relates to the technical field of engineering surveying and mapping, in particular to a low-altitude photogrammetry image control point laying device. The device comprises fan-shaped plates and arc-shaped blocks, character spraying areas are arranged on the fan-shaped plates, the two fan-shaped plates are symmetrically connected and concentrically arranged, the two arc-shaped blocks are symmetrically arranged, the fan-shaped plates and the arc-shaped blocks are connected to form a circular spraying mold, and the arc-shaped blocks are located on the edge of the circular spraying mold. And two fan-shaped hollow spaces which are symmetrically connected and concentric and are formed by the two arc-shaped blocks and the two fan-shaped plates form a main spraying area. The spraying mold has the beneficial effects that the spraying mold is circular, and the main spraying areas are symmetrically connected and concentric, so that an accurate central point position (namely a fan-shaped circle center) of an image control point can be directly sprayed, the image control point can be conveniently and accurately punctured on an inner page, the aerial triangulation accuracy is improved, and the overall photogrammetry result accuracy is improved.

Description

Technical Field

[0001] A non-planar spraying mold with foldable image control points relates to the technical field of engineering surveying and mapping, and in particular to a low-altitude photogrammetry image control point layout device. Background Art

[0002] During low-altitude photogrammetry, a certain number of image control points need to be marked on the ground. The image control points are generally required to have a flat ground, clear markings, and regular shapes. However, when laying out image control points for low-altitude photogrammetry using drones in mountainous or alpine areas, since there are fewer flat marking areas in mountainous areas and the overall spray mold is large and difficult to carry, the image control points are usually made by manually painting the markings on site. However, the method of manually painting the image control points on site is less efficient, and the shapes of different image control points may differ, resulting in reduced measurement accuracy. Therefore, it is very necessary to make the image control point mold portable and universal in order to adapt to the image control point marking under different terrain conditions and improve work efficiency. Patent No. 201820601573.3 discloses a foldable image control point template, including an image control point template, the image control point template is evenly divided into four image control point template structures, each of the image control point template structures includes a first side, a second side, a third side, and an operating structure provided inside the image control point template structure, and the long hinge rows on the sides are movably connected by an axis core. This foldable image control point template is convenient for painting image control points when unfolded, and easy to store and carry when folded. However, the center of the foldable image control point template is circular, and it cannot directly and accurately print the exact center of the image control points. When marking the image control points on the inner pages later, if the center of the image control points cannot be accurately marked, only a vague estimate of their center can be made, resulting in reduced aerial triangulation accuracy, which in turn affects the accuracy of the overall photogrammetry results. Utility Model Content

[0003] The problem to be solved by this utility model is to provide an image control point spraying die that can facilitate the accurate puncture of image control points on the inner page and improve the accuracy of aerial triangulation. The technical solution is as follows:

[0004] A foldable image control point non-planar spraying mold, whose key technology is that it includes a fan-shaped plate and an arc block, a text spraying area is opened on the fan-shaped plate, the two fan-shaped plates are symmetrically connected and arranged concentrically, the two arc blocks are symmetrically arranged, and the fan-shaped plates and the arc blocks are connected to form a circular spraying mold. The arc block is located at the edge of the circular spraying mold, and the two arc blocks and the two fan-shaped hollow spaces formed by the two fan-shaped plates, which are symmetrically connected and concentric, form the main spraying area.

[0005] The sector plate and the arc block are connected by hinges to form a whole.

[0006] The connecting edges of the sector plate and the arc block form a fold line.

[0007] The thickness of the sector plate and the arc block is 1 to 3 mm.

[0008] Compared with the prior art, the present invention has the following beneficial effects:

[0009] 1. The spraying mold of this utility model is circular in shape, and the main spraying areas are symmetrically connected and have the same center, so the precise center point of the image control point (i.e. the center of the fan-shaped circle) can be directly sprayed, which is convenient for accurately pricking the image control point on the inner page, improving the accuracy of aerial triangulation, and thus improving the accuracy of the overall photogrammetry results.

[0010] 2. The spray mold is symmetrically connected by hinges. When folded, the area is 1 / 4 of the unfolded area of ​​the mold, which is easy to carry. At the same time, the hinge connection can also make the mold surface more fit to some uneven non-planar ground, so as to adapt to the normal low-altitude photogrammetry work in most non-extreme terrain conditions, expanding the scope of application.

[0011] 3. The main spraying area and text spraying area of ​​the spraying mold have regular shapes, which facilitates the production of standardized ground image control points, improves the recognition accuracy of image control points, and also improves the work efficiency of field deployment of image control points. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a structural diagram of the utility model. DETAILED DESCRIPTION

[0013] See also Figure 1 A foldable image control point non-planar spraying mold, the key technology of which is that it includes a fan-shaped plate 4 and an arc block 1, a text spraying area 6 is hollowed out on the fan-shaped plate 4, the two fan-shaped plates 4 are symmetrically connected and arranged concentrically, the two arc blocks 1 are symmetrically arranged, and the fan-shaped plates 4 and the arc block 1 are connected to form a circular spraying mold. The arc block 1 is located at the edge of the circular spraying mold, and the two arc blocks 1 and the two fan-shaped hollow spaces formed by the two fan-shaped plates 4, which are symmetrically connected and concentric, form a main spraying area 5. When the mold fits the ground, the image control point identification pattern can be formed by directly spraying the hollow ground of the main spraying area 5 with paint or spray paint. Since the spraying mold is circular in shape and the main spraying areas are symmetrically connected and have the same center, the precise center point of the image control point (that is, the center of the fan-shaped circle) can be directly sprayed, which is convenient for accurately puncturing the image control points on the inner pages and improving the accuracy of aerial triangulation. After the text mold is installed in the text spraying area 6 (made in advance as required), paint or spray paint is directly sprayed to form a text pattern.

[0014] The sector plate 4 and the arc block 1 are connected by a hinge 2 to form a whole.

[0015] The connecting edge of the sector plate 4 and the arc block 1 forms a fold line 3 .

[0016] The thickness of the sector plate 4 and the arc block 1 is 1 to 3 mm.

[0017] When storing, the bag can be folded twice along the horizontal and vertical folding lines 3 using the hinges 2. The folded area is only one-fourth of the unfolded area, making it very easy to carry.

Claims

1. A foldable image control point non-planar spraying mold, characterized in that The invention comprises a sector plate (4) and an arc block (1), a text spraying area (6) is provided on the sector plate (4), two sector plates (4) are symmetrically connected and arranged concentrically, two arc blocks (1) are symmetrically arranged, the sector plates (4) and the arc block (1) are connected to form a circular spraying mold, the arc block (1) is located at the edge of the circular spraying mold, and two sector-shaped hollow spaces formed by the two arc blocks (1) and the two sector plates (4) that are symmetrically connected and concentrically formed form a main spraying area (5).

2. The foldable image control point non-planar spraying mold according to claim 1, characterized in that The sector plate (4) and the arc block (1) are connected via a hinge (2) to form a whole.

3. The foldable image control point non-planar spraying mold according to claim 1, characterized in that The connecting edges of the sector plate (4) and the arc block (1) form a folding line (3).

4. The foldable image control point non-planar spraying mold according to claim 1, characterized in that The thickness of the sector plate (4) and the arc block (1) is 1 to 3 mm.

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