Satellite calibration positioning device based on hexagonal corner reflector

Abstract

The utility model discloses a satellite calibration positioning device based on a hexagonal corner reflector, which comprises an observation pillar pre-embedded assembly and the hexagonal corner reflector, the hexagonal corner reflector comprises a bottom plate and at least four side plates distributed around the bottom plate, the side plates are respectively arranged perpendicular to the bottom plate, and the observation pillar pre-embedded assembly is arranged on the observation pillar pre-embedded assembly. The side plates are oppositely arranged on the bottom plate in pairs, so that at least four dihedral corner reflectors are formed; the bottom plate is further provided with a supporting frame connected with the side plates, and the middle of the supporting frame is further connected with an antenna connecting rod. According to the satellite calibration and positioning device, the structural form and the supporting and connecting mode of the bottom plate and the side plates are improved, at least four dihedral corner reflectors can be formed, the dihedral corner reflectors can be matched with the flight direction of a satellite lifting rail and the four radar sight directions under the left-right view condition respectively, and the antenna connecting rods are arranged in a matched mode; and coaxial observation of global satellite navigation system positioning can be realized.

Description

Technical Field

[0001] The utility model relates to the technical fields of satellite navigation and satellite remote sensing, which is the integration of image geodesy technology and GNSS positioning technology, and specifically relates to a satellite calibration and positioning device based on a hexagonal corner reflector. Background Art

[0002] The deformation monitoring service carried out by GNSS and SAR satellite interferometry technology is a new technology, which has been widely applied at present. The dihedral reflector is very sensitive to the satellite heading angle and the incident angle, so higher surveying and construction accuracy is required for installing the dihedral reflector.

[0003] In terms of the design of corner reflectors that support right-looking or left-looking of satellite ascending and descending orbits, there are already some good products. For example, Patent ZL201921613782.0 proposes an assembled metal dihedral reflector that supports ascending and descending orbit radar satellites, Patent ZL202021019638.7 proposes a high-precision calibration and positioning device for radar satellites and GNSS satellites, and Patent WO2018236215A1 proposes a device combining a symmetric triangular reflector and GNSS observation. These devices can all support right-looking shooting of SAR satellite ascending and descending orbits or left-looking shooting. However, these dihedral reflectors cannot well support the shooting of four incident angle modes of satellite ascending and descending orbits + left and right views, so it is difficult to meet the conditions that the corner reflector needs to be adapted to four satellite incident angle modes in some scenarios.

[0004] In summary, the existing satellite calibration and positioning devices have poor adaptability under the conditions of simultaneously meeting the four radar signal incident conditions of satellite ascending and descending orbits + left and right views, and need to be further improved. Summary of the Invention

[0005] The purpose of the utility model is to provide a satellite calibration and positioning device based on a hexagonal corner reflector aiming at the deficiencies of the existing technology, and solve the technical problem of the integration of the dihedral reflector that simultaneously meets the four radar signal incident conditions of satellite ascending and descending orbits + left and right views and the GNSS high-precision positioning result.

[0006] To achieve the above purpose, the technical scheme adopted by the utility model is:

[0007] A satellite calibration and positioning device based on a hexagonal corner reflector, comprising an observation pier embedding component, and a hexagonal corner reflector arranged on the observation pier embedding component. The hexagonal corner reflector includes a bottom plate, and at least four side plates distributed around the bottom plate. The side plates are respectively arranged perpendicular to the bottom plate, and the side plates are arranged in pairs and oppositely on the bottom plate to form at least four dihedral angle reflectors; a support frame connecting the side plates is further provided on the bottom plate, and an antenna connecting rod is also connected to the middle of the support frame.

[0008] By improving the structural form and the support connection method of the bottom plate and the side plates, this satellite calibration and positioning device can form at least four dihedral angle reflectors, which can respectively adapt to four radar line-of-sight directions under the flight directions of the satellite's ascending and descending orbits and the left and right view conditions. With the setting of the antenna connecting rod, coaxial observation for global satellite navigation system positioning can be realized.

[0009] Further, the bottom plate is a hexagonal plate, there are four side plates, and the side plates are arranged in pairs and oppositely on the upper edge of the hexagonal plate. Each group of side plates respectively forms two dihedral angle reflectors with the bottom plate.

[0010] Further, the support frame includes a first support frame arranged on the bottom plate, and a second support frame located above the first support frame. The first support frame connects the bottom plate and the side plates, the second support frame connects the side plates, and a reinforcing rod is further provided on the second support frame. The reinforcing rod connects the antenna connecting rod.

[0011] The support frame adopts double support of the first support frame and the second support frame, enhancing the stability and durability of the whole structure, reducing the risk of damage caused by external factors. The design of the double-layer support frame increases the rigidity of the structure, enabling the reflector to better withstand forces from different directions, including wind force and vibration.

[0012] Further, the first support frame includes six first support rods connected end to end. The contour of the first support frame is the same as the contour shape of the bottom plate. The first support rods are detachably connected to the bottom plate, and the side plates are detachably connected to the outside of the side plates.

[0013] Further, the second support frame includes six second support rods connected end to end. The contour of the second support frame is the same as the contour shape of the first support frame and has the same area. The second support frame is parallelly laminated above the first support frame and is connected to multiple side plates.

[0014] Further, both ends of the reinforcing rod are detachably connected to the second support frame. A pipe clamp is provided on the side surface of the reinforcing rod, and the pipe clamp connects and fixes the antenna connecting rod.

[0015] Further, the support frame, the bottom plate, and the antenna connecting rod are all arranged on the same central axis. A GNSS positioning center is further provided on the antenna connecting rod. The GNSS positioning center is located at the top of the antenna connecting rod and covers the axis of the antenna connecting rod.

[0016] In some embodiments, the profile of the side plate includes a rectangle or a curved-edge rectangle with an arc edge. The arc edge of the curved-edge rectangle faces upward. The profile of the bottom plate includes a combination of four straight edges and two arc edges or six straight edges. The connection between the bottom plate and the side plate is a straight edge.

[0017] Further, the observation pier embedded component includes a top plate for supporting and connecting the bottom plate. A plurality of embedded feet are provided below the top plate. A north-pointing mark is further provided on the top plate so that installers can directly adjust the direction of the embedded component according to the scale line.

[0018] Further, the geometric imaging centers of the plurality of dihedral reflectors formed by the plurality of side plates are located on the intersection line of each side plate and the bottom plate; when and only when the effective reflection signals of the dihedral reflectors conform to the symmetry law, the geometric imaging centers of the dihedral reflectors are located at the midpoint of the intersection line of the bottom plate and the side plate perpendicular to it.

[0019] Compared with the prior art, the beneficial effects of the present utility model are as follows: 1. By improving the structural form and support connection method of the bottom plate and the side plate, the satellite calibration and positioning device of the present utility model can form at least four dihedral reflectors, which can respectively adapt to the four radar line-of-sight directions under the satellite ascending and descending orbit flight directions and the left and right view conditions. With the setting of the antenna connecting rod, coaxial observation of the global satellite navigation system positioning can be realized; 2. The support frame adopts double support of the first support frame and the second support frame, enhancing the stability and durability of the entire structure, reducing the risk of damage caused by external factors. The design of the double-layer support frame increases the rigidity of the structure, enabling the reflector to better withstand forces from different directions, including wind force and vibration; 3. The presence of the north-pointing mark simplifies the azimuth calibration step during installation, and installers can directly adjust the direction of the embedded component according to the scale line; 4. The position of the GNSS positioning center on the antenna connecting rod is located at the center of the bottom plate, which helps to make a more accurate relative position reduction between the axis of GNSS positioning and the scattering centers of the four corner reflectors. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1Schematic diagram of the north-south direction of a satellite calibration and positioning device based on a hexagonal corner reflector of the present utility model;

[0021] Figure 2 Isometric view of a satellite calibration and positioning device based on a hexagonal corner reflector of the present utility model;

[0022] Figure 3 Top view of a satellite calibration and positioning device based on a hexagonal corner reflector of the present utility model;

[0023] Figure 4 Another structural schematic diagram of a satellite calibration and positioning device based on a hexagonal corner reflector of the present utility model;

[0024] Figure 5 Structural schematic diagram of an observation pier embedded part provided in this embodiment;

[0025] In the figure: 1, bottom plate; 2, first side plate; 3, second side plate; 4, third side plate; 5, fourth side plate; 6, antenna connecting rod; 7, embedded support leg; 8, first support frame; 9, second support frame; 10, top plate; 11, north-pointing mark; 12, strengthening rod; 13, pipe clamp. Detailed implementation manners

[0026] Next, the technical solutions of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present utility model.

[0027] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "middle", "upper", "lower", "left", "right", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It 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 understood as a limitation to the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0028] Such as Figures 1 to 3As shown in the figure, a satellite calibration and positioning device based on a hexagonal corner reflector includes an observation pier embedded component, and a hexagonal corner reflector arranged on the observation pier embedded component. The hexagonal corner reflector includes a bottom plate 1 and at least four side plates distributed around the bottom plate. The side plates are respectively arranged perpendicular to the bottom plate 1, and the side plates are arranged in pairs and oppositely on the bottom plate 1 to form at least four dihedral angle reflectors; a support frame connecting the side plates is further arranged on the bottom plate 1, and an antenna connecting rod 6 is further connected to the middle of the support frame.

[0029] By improving the structural form and the support connection mode of the bottom plate 1 and the side plates, this satellite calibration and positioning device can form at least four dihedral angle reflectors, which can respectively adapt to four radar line-of-sight directions under the satellite ascending and descending orbit flight directions and the left and right view conditions. With the setting of the antenna connecting rod, coaxial observation for global satellite navigation system positioning can be realized.

[0030] In this embodiment, the bottom plate 1 is a hexagonal plate, there are four side plates, and the side plates are arranged in pairs and oppositely on the upper edge of the hexagonal plate. Each group of side plates respectively forms two dihedral angle reflectors with the bottom plate.

[0031] The support frame includes a first support frame 8 arranged on the bottom plate 1 and a second support frame 9 located above the first support frame 8. The first support frame 8 connects the bottom plate 1 and the side plates, the second support frame 9 connects the side plates, and a reinforcing rod 12 is further arranged on the second support frame 9. The reinforcing rod 12 connects the antenna connecting rod 6.

[0032] In the actual manufacturing process, the first support frame 8 and the second support frame 9 with basically the same size and shape can be manufactured first, and then the four side plates are connected and fixed in pairs and oppositely on the outer sides of the first support frame 8 and the second support frame 9 to form a combined component, and installing it on the bottom plate 1 can obtain the transmitter component. This connection and installation method is simple and convenient and easy to operate.

[0033] Specifically, the first support frame 8 includes six first support rods connected end to end. The contour of the first support frame is the same as the contour of the bottom plate and the enclosed area is also basically the same. The first support rod is detachably connected to the bottom plate, and the side plate is detachably connected to the outside of the side plate.

[0034] By using the hexagonal first support frame 8, a more uniform and stable support structure can be provided, reducing deformation and damage caused by external forces. The hexagonal structural design increases the rigidity of the first support frame 8, enabling it to better withstand forces from different directions. The connection design between the first support frame 8 and the bottom plate 1 and the side plates can enhance the connection strength of the entire structure, ensuring the stability and durability of the structure in a harsh environment.

[0035] Further, the second support frame 9 includes six second support rods connected end to end. The outline of the second support frame has the same shape and equal area as the outline of the first support frame. The second support frame is stacked parallel above the first support frame and is connected to multiple side plates.

[0036] The first support frame 8 strengthens the bottom of the side plate. The second support frame 9 is positioned near the top of the side plate to strengthen the top of the side plate. The design of the two support frames provides double support, enhancing the stability and durability of the entire structure and reducing the risk of damage caused by external factors. The design of the double-layer support frame increases the rigidity of the structure, enabling the reflector to better withstand forces from different directions, including wind force and vibration.

[0037] Further, both ends of the reinforcing rod 12 are detachably connected to the second support frame 9. For example, both ends of the reinforcing rod 12 are lapped with two opposite second support rods and connected by screws. A pipe clamp 13 is provided on the side of the reinforcing rod 12, and the pipe clamp 13 connects and fixes the antenna connecting rod.

[0038] The extending direction of the antenna connecting rod 6 coincides with the axis of the hexagonal corner reflector. The side wall of the antenna connecting rod 6 is connected to the reinforcing rod 12 through the pipe clamp 13.

[0039] In this embodiment, the second support rods of the second support frame 9 provide stable and reliable support points for the reinforcing rod, and the reinforcing rod provides stable and reliable support points for the antenna connecting rod 6.

[0040] The bottom of the antenna connecting rod 6 is connected to the bottom plate 1. To prevent the antenna connecting rod 6 from being too long and having poor wind and seismic resistance, the antenna connecting rod 6 is connected to the reinforcing rod. At least two positioning points are provided on the antenna connecting rod 6. The design of the reinforcing rod increases the rigidity and stability of the antenna connecting rod 6, especially at the connection points, where additional support and connection strength can be provided. The presence of the reinforcing rod can improve the bending strength and torsional strength of the entire support frame and reduce the risk of structural deformation.

[0041] Further, the support frame, the bottom plate, and the antenna connecting rod are all arranged on the same central axis. A GNSS positioning center is also provided on the antenna connecting rod. The GNSS positioning center is located at the top of the antenna connecting rod and covers the axis of the antenna connecting rod.

[0042] The position of the GNSS positioning center is at the center of the bottom plate and coincides with the center of the top plate of the observation pier, which helps to directly use the observation pier embedded parts to achieve high-precision GNSS observation without installing corner reflectors.

[0043] In some embodiments, the contour of the side plate includes a rectangle or a curved-edge rectangle with an arc edge (as Figure 4 shown). The arc edge of the curved-edge rectangle faces upward. The contour of the bottom plate includes a combination of four straight edges and two arc edges or six straight edges. The connection between the bottom plate and the side plate is a straight edge.

[0044] The geometric imaging center of each dihedral angle reflector is located on the intersection line of the bottom plate 1 and the side plate; when and only when the effective reflected signal of the dihedral angle reflector conforms to the symmetry law, the geometric imaging center of the dihedral angle reflector is located at the midpoint of the intersection line of the bottom plate 1 and the side plate.

[0045] In this embodiment, the side plate at least includes a first side plate 2, a second side plate 3, a third side plate 4, and a fourth side plate 5. The first side plate 2 and the bottom plate 1 form a dihedral angle reflector, and the fourth side plate 5 and the bottom plate 1 form a dihedral angle reflector. These two reflectors respectively support the left and right viewing angles of one SAR satellite orbit.

[0046] The second side plate 3 and the bottom plate 1 form a dihedral angle reflector, and the third side plate 4 and the bottom plate 1 form a dihedral angle reflector. These two reflectors respectively support the left and right viewing angles of another SAR satellite orbit.

[0047] It is determined by the satellite heading angles preset by the satellite ascending and descending orbits + left and right viewing conditions for the four vertically arranged side plate orientations, and a total of 4 heading angles need to be adapted. In some examples, there are slight differences in the heading angles under the left and right viewing conditions of the SAR satellite ascending and descending orbits. To adapt to this difference, the angles of the four sides connecting the two sides of the hexagonal bottom plate to the side plate need to be adapted to the four different heading angles α, β, μ, ν corresponding to the satellite in 4 viewing states. The ascending and descending orbit heading angles corresponding to the two sides of the northern trapezoid are α and β, and the ascending and descending orbit heading angles corresponding to the two sides of the southern trapezoid are μ and ν.

[0048] Further, in combination with Figure 5As shown, the embedded component of the observation pier includes a top plate 10 for supporting and connecting the bottom plate 1. Below the top plate 10, there are multiple embedded feet 7, and a north-pointing mark 11 is also provided on the top plate 10.

[0049] The embedded feet 7 are rod bodies extending downward, and the ends are provided with bending structures, which can provide a solid support for the reflector, reduce the shaking caused by external factors (such as wind force, vibration, etc.), and thus ensure the accuracy of the observation data. The design of multiple feet helps to more stably connect the cement and steel bar bodies in the observation pier, reduces the pressure on a single support point, and reduces the risk of cracking due to uneven stress on the observation pier.

[0050] By presetting the north direction scale line on the top plate 10, it is ensured that the embedded component of the observation pier can accurately adapt to the installation of the horizontal orientation of the corner reflector. The existence of the scale line facilitates the orientation calibration step during the installation process. The installer can directly adjust the direction of the embedded component according to the scale line, and use professional equipment such as a compass or a GNSS orientation instrument to achieve high-precision north-pointing orientation, and the orientation accuracy should be higher than 0.5 degrees.

[0051] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A satellite calibration and positioning device based on a hexagonal corner reflector, comprising an observation pier embedding assembly and a hexagonal corner reflector arranged on the observation pier embedding assembly, characterized in that, The hexagonal corner reflector includes a bottom plate, and at least four side plates distributed around the bottom plate. The side plates are respectively arranged perpendicular to the bottom plate, and the side plates are arranged in pairs opposite to each other on the bottom plate to form at least four dihedral angle reflectors; a support frame connecting the side plates is further provided on the bottom plate, and an antenna connecting rod is also connected to the middle of the support frame.

2. The satellite calibration and positioning device based on a hexagonal corner reflector according to claim 1, characterized in that, The bottom plate is a hexagonal plate, there are four side plates, and the side plates are arranged in pairs opposite to each other on the upper edge of the hexagonal plate. Each group of side plates respectively forms two dihedral angle reflectors with the bottom plate.

3. The satellite calibration and positioning device based on a hexagonal corner reflector according to claim 1, characterized in that The support frame includes a first support frame arranged on the bottom plate and a second support frame located above the first support frame. The first support frame connects the bottom plate and the side plates, the second support frame connects the side plates, and a reinforcing rod is further provided on the second support frame. The reinforcing rod connects the antenna connecting rod.

4. The satellite calibration and positioning device based on a hexagonal corner reflector according to claim 3, characterized in that, The first support frame includes six first support rods connected end to end. The contour of the first support frame is the same as the contour shape of the bottom plate. The first support rods are detachably connected to the bottom plate, and the side plates are detachably connected to the outside of the side plates.

5. The satellite calibration and positioning device based on a hexagonal corner reflector according to claim 3, characterized in that The second support frame includes six second support rods connected end to end. The contour of the second support frame is the same as the contour shape of the first support frame and has the same area. The second support frame is parallelly stacked above the first support frame and is connected to multiple side plates.

6. The satellite calibration and positioning device based on a hexagonal corner reflector according to claim 3, characterized in that, Both ends of the reinforcing rod are detachably connected to the second support frame, and a pipe clamp is provided on the side of the reinforcing rod. The pipe clamp connects and fixes the antenna connecting rod.

7. The satellite calibration and positioning device based on a hexagonal corner reflector according to claim 1, wherein, The support frame, the bottom plate, and the antenna connecting rod are all arranged on the same central axis. A GNSS positioning center is further provided on the antenna connecting rod. The GNSS positioning center is located at the top of the antenna connecting rod and covers the axis of the antenna connecting rod.

8. The satellite calibration and positioning device based on a hexagonal corner reflector according to claim 1, characterized in that, The contour of the side plate includes a rectangle or a curved-edge rectangle with an arc edge. The arc edge of the curved-edge rectangle faces upward. The contour of the bottom plate includes a combination of four straight edges and two arc edges or six straight edges. The connection between the bottom plate and the side plate is a straight edge.

9. The satellite calibration and positioning device based on a hexagonal corner reflector according to claim 1, characterized in that, The observation pier embedded component includes a top plate for supporting and connecting the bottom plate. A plurality of embedded feet are provided below the top plate, and a north-pointing mark is also provided on the top plate.

10. The satellite calibration and positioning device based on a hexagonal corner reflector according to claim 1, characterized in that, The geometric imaging centers of the multiple dihedral angle reflectors formed by the multiple side plates are located on the intersection line of each side plate and the bottom plate; when and only when the effective reflected signals of the dihedral angle reflectors conform to the symmetry law, the geometric imaging centers of the dihedral angle reflectors are located at the midpoint position of the intersection line of the bottom plate and the side plate perpendicular to it.

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