Photogrammetry image control point mark suitable for multiple terrains

Abstract

The utility model relates to a photogrammetry image control point mark suitable for multiple terrains, and relates to the technical field of photogrammetry. The device comprises a multispectral reflection mark plate and a folding assembly installed on the multispectral reflection mark plate, the folding assembly comprises a supporting rod and a connecting piece, one end of the supporting rod is rotationally connected to one side of the multispectral reflection mark plate, and the other end of the supporting rod is rotationally connected to the other side of the multispectral reflection mark plate. The other end of the supporting rod is detachably provided with a stabilizing device through the connecting piece. The method has the effects of adapting to various topographic conditions and simplifying the operation process.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of photogrammetry, in particular to a photogrammetry image control point mark suitable for multiple terrains. BACKGROUND

[0002] Photogrammetry technology plays an important role in the modern surveying and mapping field, and has a wide range of applications in geographic information collection, terrain modeling and environmental monitoring. With the development of unmanned aerial vehicle technology, photogrammetry gradually develops in the direction of high precision and multi-spectrum. The design of the image control point mark, as a key device in photogrammetry, directly affects the accuracy and efficiency of data collection. Traditional image control point marks are mainly designed for single terrain conditions and are difficult to meet the use requirements in complex terrain environments. Therefore, developing an image control point mark suitable for multiple terrain conditions has become the focus of the industry.

[0003] At present, in order to cope with different terrain conditions, the industry usually adopts the following means: one is to directly install the mark plate on the flat ground through the fixed base, which is suitable for hard ground environment; two is to fix the mark plate in the soft soil by using the inserted ground anchor, which is suitable for field operation; three is to suspend the mark plate on the water surface by using the buoyancy device, which is suitable for water operation environment. In addition, some mark plates realize portability through simple folding structure, but most of these schemes are limited to single function and cannot meet the use requirements in multiple terrain conditions.

[0004] However, the image control point mark in the prior art generally has poor adaptability, especially when facing complex terrain, different types of fixing devices need to be frequently replaced, which is tedious and inefficient. At the same time, the structural design of the traditional mark plate lacks flexibility and cannot balance stability and portability, which limits its popularization value in practical application. Therefore, there is an urgent need for a photogrammetry image control point mark which can adapt to multiple terrain conditions and is easy to operate. CONTENT OF THE INVENTION

[0005] In order to adapt to multiple terrain conditions and simplify the operation process, the application provides a photogrammetry image control point mark suitable for multiple terrains.

[0006] The photogrammetry image control point mark suitable for multiple terrains provided by the application adopts the following technical scheme:

[0007] A photogrammetry image control point mark suitable for multiple terrains, comprising a multi-spectral reflective mark plate and a folding assembly installed on the multi-spectral reflective mark plate, the folding assembly comprising a support rod and a connecting piece, one end of the support rod being rotatably connected to one side of the multi-spectral reflective mark plate, the other end of the support rod being detachably installed with a stabilizing device through the connecting piece.

[0008] By adopting the technical scheme, the folding assembly is combined with the multi-spectrum reflective marker board to realize quick unfolding and storage of the marker board, and the supporting rods and the detachable stabilizing device can adapt to different terrain requirements, thereby improving portability and environmental adaptability.

[0009] As a preference, the stabilizing device is provided as a positioning suction cup, a screw anchor or an inflatable buoy counterweight.

[0010] By adopting the technical scheme, the marker board can be stably fixed on smooth surfaces, soft ground or water areas and the like, thereby enhancing universality and stability.

[0011] As a preference, the folding assembly further comprises a spring hinge, one end of the spring hinge being connected to the multi-spectrum reflective marker board, and the other end of the spring hinge being used for connecting the supporting rod.

[0012] By adopting the technical scheme, the spring hinge is used to connect the supporting rod and the marker board to realize automatic unfolding or folding, thereby simplifying an operation process and improving deployment efficiency.

[0013] As a preference, the other end of the supporting rod is provided with a threaded hole, and one end of the connecting piece is threadedly installed in the threaded hole.

[0014] By adopting the technical scheme, the threaded hole and the connecting piece are threadedly matched to ensure firm installation of the stabilizing device and facilitate replacement, and meanwhile, the connection strength between the supporting rod and the stabilizing device is enhanced.

[0015] As a preference, the number of the supporting rods is three, and the three supporting rods are provided in a tripod type.

[0016] By adopting the technical scheme, the tripod type supporting structure provides higher stability, effectively prevents the marker board from tilting or toppling, and is especially suitable for uneven or windy environments.

[0017] As a preference, the multi-spectrum reflective marker board is provided, in sequence, on a side away from the folding assembly, with a heat reflective layer, a near-infrared absorbing coating and a reflective film.

[0018] By adopting the technical scheme, multi-spectrum reflective performance is optimized to ensure high recognition of the marker board in visible light, infrared and the like, thereby improving accuracy of photogrammetry data.

[0019] As a preference, the heat reflective layer is provided as an aluminum foil.

[0020] By adopting the technical scheme, the aluminum foil heat reflective layer effectively reduces thermal interference caused by solar radiation, and avoids deformation or reflectivity fluctuation of the marker board due to temperature change.

[0021] As preferred, the light-reflecting film is a high-reflectivity micro-prism light-reflecting film.

[0022] By adopting the above technical solution, the high-reflectivity micro-prism light-reflecting film significantly enhances the visible light reflection intensity of the signboard, so that the signboard can still be clearly identified under far distance or low light conditions, and the measurement efficiency is improved.

[0023] In summary, the present application has at least one of the following beneficial technical effects:

[0024] 1. By means of the detachable stabilizing device (such as a positioning suction cup, a screw anchor, and an inflatable buoy counterweight) and the folding support structure, the like control point sign can quickly adapt to various complex terrains such as smooth surfaces, soft ground, and water areas, and the flexibility and stability of field operation are improved;

[0025] 2. By means of the spring hinge and the tripod folding design, the signboard can be unfolded and stored by one key, the operation efficiency is greatly improved, the transportation volume is reduced, and the signboard is convenient to carry and reuse;

[0026] 3. By means of the multi-layer optimization design of the heat-reflecting layer, the near-infrared absorbing coating, and the high-reflectivity micro-prism light-reflecting film, the reflection characteristics of the signboard in the visible light, infrared, and other wave bands are enhanced, the accuracy and reliability of the photogrammetry data are ensured, and the signboard is suitable for different light and environmental conditions. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a schematic diagram of the overall structure of the embodiment of the present application;

[0028] Figure 2 is a schematic diagram of the structure of the multi-spectral reflection signboard in the embodiment of the present application;

[0029] Figure 3 is a plan view of the multi-spectral reflection signboard in the embodiment of the present application.

[0030] The reference signs are as follows: 1, multi-spectral reflection signboard; 11, heat-reflecting layer; 12, near-infrared absorbing coating; 13, light-reflecting film; 2, folding assembly; 21, support rod; 22, connecting piece; 23, spring hinge; 231, hinged arm; 232, torsion spring. DETAILED DESCRIPTION

[0031] The following will be described in detail with reference to the accompanying drawings. Figures 1-3 The present application will be further described in detail.

[0032] The embodiment of the present application discloses a photogrammetry like control point signboard suitable for multiple terrains.

[0033] Reference will be made to Figure 1The photogrammetry image control point marker suitable for multiple terrains comprises a multi-spectrum reflective marker plate 1 and a folding assembly 2 installed on the multi-spectrum reflective marker plate 1. The folding assembly 2 comprises a spring hinge 23, a support rod 21 and a connecting piece 22. One end of the support rod 21 is connected to one side of the multi-spectrum reflective marker plate 1 through the spring hinge 23, and the other end of the support rod 21 is provided with a threaded hole, and the connecting piece 22 is used for connecting an external fixing structure and is screwed into the threaded hole. The connecting piece 22 is used for connecting the fixing structure suitable for different terrains, so that the adaptation to multiple terrains can be realized.

[0034] The number of support rods 21 is three, and the three support rods 21 are arranged in a tripod type. The tripod type design can significantly improve the overall support stability of the marker plate. The spring hinge 23 comprises two hinge arms 231 and a torsion spring 232. The hinge arms 231 are made of high-strength aluminum alloy material, which has the characteristics of light weight and corrosion resistance. The torsion spring 232 is made of stainless steel, which can maintain good elastic performance after long-term use. By adjusting the pre-tightening force of the torsion spring 232, the stability of the support rod 21 at different angles can be controlled. For example, when the support rod 21 is unfolded, the elastic force of the torsion spring 232 can keep the support rod 21 in a horizontal state; when the support rod 21 is folded, the elastic force of the torsion spring 232 can make the support rod 21 closely fit the multi-spectrum reflective marker plate 1. This structure design not only improves the portability of the marker plate, but also enhances its stability in actual use. As an alternative feature, the spring hinge 23 can also adopt other forms of hinge structure, such as air pressure hinge or hydraulic hinge, to realize more accurate angle adjustment function.

[0035] Different accessories can be connected through the connecting piece 22 to adapt to multiple terrains, such as connecting a vacuum suction cup through the connecting piece 22 to adapt to hard ground; or connecting a spiral ground anchor through the connecting piece 22 to adapt to soft ground; and connecting an inflatable buoy counterweight through the connecting piece 22 for water operation environment.

[0036] Reference Figure 2 The side of the multi-spectrum reflective marker plate 1 away from the folding assembly 2 is sequentially provided with a heat reflective layer 11, a near-infrared absorbing coating 12 and a reflective film 13. The heat reflective layer 11 is set as an aluminum foil, which has good heat reflection performance and can effectively improve the thermal infrared imaging contrast. The near-infrared absorbing coating 12 is used for enhancing the multi-spectrum identification of the unmanned aerial vehicle, and its main components include titanium oxide and zinc oxide, which can absorb near-infrared light of specific wave band. The reflective film 13 is set as a high-reflectivity micro-prism reflective film, which is used for visible light wave band and has extremely high reflectivity and clarity.

[0037] Reference Figure 3In the embodiment, the multispectral reflective marker plate 1 adopts a pattern of a central hexagon + a peripheral ring code, adjacent rings are respectively set as red and yellow, the hexagon and the peripheral ring code are filled with blue, the hexagon is evenly divided into six parts along the clockwise direction, and is sequentially cycled according to yellow, green and red along the clockwise direction.

[0038] The implementation principle of the photogrammetry image control point marker suitable for multiple terrains in the embodiment is as follows: through the detachable connecting piece 22, the vacuum chuck, the screw anchor and the inflatable buoy counterweight are adapted, the hard ground, the soft soil and the water environment are comprehensively covered, and the problem of insufficient environmental adaptability of the traditional marker plate is effectively solved; in addition, the multispectral reflective marker plate 1 adopts the composite structure design of the thermal reflective layer 11, the near-infrared absorption coating 12 and the high-reflectivity reflective film 13, the reflective contrast and the identification precision of the marker plate in the thermal infrared imaging, the multispectral identification and the visible light band are significantly enhanced, and a more reliable ground control point marker solution is provided for photogrammetry.

[0039] The above are preferred embodiments of the application, and do not limit the protection scope of the application, so: equivalent changes made according to the structure, shape, principle of the application should be covered within the protection scope of the application.

Claims

1. A photogrammetric control point marker adaptable to various terrains, characterized in that: The device includes a multispectral reflective signboard (1) and a folding assembly (2) mounted on the multispectral reflective signboard (1). The folding assembly (2) includes a support rod (21) and a connector (22). One end of the support rod (21) is rotatably connected to one side of the multispectral reflective signboard (1), and the other end of the support rod (21) is detachably mounted with a stabilizing device via the connector (22).

2. The photogrammetric control point marker adapted to various terrains according to claim 1, characterized in that: The stabilizing device is configured as a positioning suction cup, a spiral anchor, or an inflatable float counterweight.

3. The photogrammetric control point marker adapted to various terrains according to claim 1, characterized in that: The folding assembly also includes a spring hinge (23), one end of which is connected to the multispectral reflective sign plate (1), and the other end of which is used to connect to the support rod (21).

4. A photogrammetric control point marker adapted to various terrains as described in claim 1, characterized in that: The other end of the support rod (21) is provided with a threaded hole, and one end of the connector (22) is threaded into the threaded hole.

5. A photogrammetric control point marker adapted to various terrains according to claim 1, characterized in that: The number of the support rods (21) is three, and the three support rods (21) are arranged in a tripod manner.

6. A photogrammetric control point marker adapted to various terrains according to claim 1, characterized in that: The multispectral reflective signboard (1) is provided with a heat reflective layer (11), a near-infrared absorption coating (12) and a reflective film (13) on the side away from the folding assembly (2).

7. A photogrammetric control point marker adapted to various terrains according to claim 6, characterized in that: The heat reflective layer (11) is made of aluminum foil.

8. A photogrammetric control point marker adapted to various terrains according to claim 6, characterized in that: The reflective film (13) is configured as a high-reflectivity microprism reflective film.

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