Radar triangular reflector device

Abstract

The utility model discloses a radar triangular reflector device, which comprises a first panel, a second panel and a third panel which are vertically connected with one another to form a triangular reflection area, a connecting plate is arranged on one side, opposite to the triangular reflection area, of the first panel and the second panel, and a hoop assembly is arranged at the position, outside the triangular reflection area, of the connecting plate and / or the third panel. Aiming at the problem of adaptive satellite local incident angle, the corner reflector does not adapt the pitching angle through joint assembly, but realizes optimal adaptation by adjusting the length ratio of the vertical panel to the horizontal panel; aiming at the adaptation of a radar course angle, accurate adaptation is achieved by rotating the angle of the hoop assembly, the technical problem that in the prior art, a reflector cannot meet the adaptation of GNSS steel pipe standard parallel address, street lamps and steel pipe structure iron tower parallel address InSAR monitoring at the same time is solved, and the reflector has the advantages of being simple in structure, easy to install, high in stability after being fixed, high in adaptability and the like.

Description

Technical Field

[0001] This utility model relates to the field of radar satellite remote sensing technology, specifically to a radar triangular reflector device. Background Technology

[0002] When using SAR satellite remote sensing for surface deformation monitoring, the phase stability of radar waves reflected from natural objects is poor, resulting in low deformation monitoring accuracy. Currently, artificial corner reflectors are often used as stable reflection target points to enhance the reflection intensity of radar signals during monitoring. Most existing artificial corner reflectors are placed on the ground for surface deformation monitoring, but some can also be adapted to rod-shaped targets. For example, the patent "An Extendable Clamp-Type Corner Reflector (Application No.: 202321801287.9)" designs a corner reflector device with an extendable clamp that can be installed on columnar structures such as steel pipes and streetlights, allowing for pitch and azimuth angle adjustments. It is applicable to most rod-shaped connectors. However, the clamp of this product is divided into clamps on columnar structures, clamps on the corner reflector's own support rod, and horizontal adjustment structures and pitch adjustment mechanisms on the corner reflector support rod. The manufacturing process is complex, and on-site installation is time-consuming and labor-intensive. The patent "A Corner Reflector and Integrated GNSS Device (Application No.: 202222774503.7)" proposes a triangular reflector mounted on a GNSS steel pipe marker using two clips. While its structure is simple, the connection between the two clips and the triangular reflector is a point-like connection, resulting in low stability. In particular, the tilt adjustment device at the top is secured with a single screw, leading to poor stability and making it difficult to ensure the reflector's stability in strong winds or other adverse weather conditions. Both types of reflectors lack drainage outlets, failing to address issues such as water and dust accumulation caused by rain, snow, and sandstorms.

[0003] In some monitoring scenarios, it is difficult to construct observation piers for flat-ground corner reflectors on-site. Furthermore, some existing corner reflectors use various complex support structures to connect the metal plates of the corner reflectors. During monitoring, factors such as significant temperature changes or strong winds may cause substantial deformation of the support structures, damaging the corner reflector's structure, affecting its radar wave reflection, and compromising its stability.

[0004] In summary, the existing radar triangular reflector devices are not well-suited for GNSS co-location observation of steel pipe pier targets, monitoring of street light targets, and monitoring of steel pipe structure tower targets, and require further improvement. Summary of the Invention

[0005] The purpose of this invention is to address the problems existing in the prior art by providing a radar triangular reflector device.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A radar triangular reflector device includes a panel assembly comprising a first panel, a second panel, and a third panel connected to each other. The first panel and the second panel are vertically disposed on the third panel, and the vertical sides of the first panel and the second panel are vertically connected together to form a triangular reflective area. A connecting plate is provided on the side of the first panel and the second panel facing away from the triangular reflective area, and a clamping assembly is provided on the connecting plate and / or the third panel at a position outside the triangular reflective area.

[0008] This radar triangular reflector device, through the arrangement of the panel assembly and the clamp assembly, can solve the compatibility problem in the prior art where reflectors cannot simultaneously meet the requirements of GNSS co-location observation of steel pipe pier targets, monitoring of street light targets, and monitoring of steel pipe structure tower targets. Moreover, the structure is simpler, the reflector has fewer joints, is easier to install and fix, has higher stability after fixing, requires less adjustment work, and has strong adaptability.

[0009] Furthermore, a pair of L-shaped connecting plates are connected to the third panel, and the pair of L-shaped connecting plates are respectively connected to the first panel and the second panel.

[0010] Furthermore, the first panel and the second panel are symmetrically arranged and each has a connecting strip on its upper edge, the connecting strip connecting the connecting plate.

[0011] Furthermore, the first panel and the second panel are connected by a right-angle connecting plate disposed on the outer side. The first panel and the second panel are completely symmetrical, and their side lengths are proportional to the side length of the third panel. This proportional relationship is calculated from the local incident angle of the satellite.

[0012] Furthermore, the connecting plate is arranged parallel to the third panel, and both the first panel and the second panel are rectangular plates, with the short sides of the rectangular plates connecting the connecting plate and the third panel respectively.

[0013] Furthermore, the centerline of the clamp assembly is located in the plane containing the bisector of the angle between the first panel and the second panel.

[0014] Furthermore, the clamp assembly includes a pair of detachably connected semi-circular clamps, one of which is mounted on the connecting plate or the third panel. The connecting plate and the third panel are provided with semi-circular slots corresponding to the semi-circular clamps. The semi-circular slots are used to connect columnar targets and achieve precise adaptation to the radar heading angle through horizontal rotation.

[0015] Furthermore, the first panel and the second panel have notches at the corners near the third panel to allow for drainage in rainy weather.

[0016] Furthermore, let the side lengths of the connection between the first panel and the second panel and the third panel be a, then: In the formula, σ represents the RCS of the triangular reflection region, and λ is the wavelength of the received radar wave.

[0017] Furthermore, the panel assembly is mounted on the cylindrical target via the clamp assembly, and one or two sets of the panel assembly are provided on the cylindrical target, respectively for adapting the satellite's orbital ascent and descent heading angles.

[0018] Compared with the prior art, the beneficial effects of this utility model are: 1. This radar triangular reflector device, through the setting of the panel assembly and the clamp assembly, can solve the compatibility problem in the prior art where reflectors cannot simultaneously meet the requirements of GNSS co-location observation of steel pipe pier targets, monitoring of street light targets, and monitoring of steel pipe structure tower targets. Moreover, the structure is simpler, the reflector has fewer joints, is easier to install and fix, has higher stability after fixing, requires less adjustment work, and has stronger adaptability; 2. This radar triangular reflector device directly connects the panel using bolts. 1. The absence of support rods or other unstable point connections reduces on-site installation workload and provides more stable and continuous radar wave reflection even in adverse weather conditions such as strong winds. 2. This radar triangular reflector uses a clamp-like design to connect and install with targets such as steel pipe piers, light poles, and steel pipe towers, overcoming the limitation of other flat-ground corner reflectors that cannot reflect radar waves on similar cylindrical structures. Furthermore, the azimuth angle of the triangular reflector can be easily adjusted during observation to facilitate radar wave reflection. 3. Regarding the RCS design, panel size adjustment has the greatest impact on RCS, while the elevation angle has a slightly weaker impact. The method to compensate for elevation angle attenuation is through adjusting the ratio of the horizontal and vertical panels, maximizing the RCS effectiveness of the triangular reflector. 4. For azimuth angle installation and adjustment, the design considers the satellite flight direction, theoretically offering four optimal incident angles. Adjusting the angle of this radar reflector achieves the best radar wave reflection effect. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of a radar triangular reflector device according to the present invention. Figure 1 ;

[0020] Figure 2 This is a three-dimensional structural diagram of a radar triangular reflector device according to the present invention. Figure 2 ;

[0021] Figure 3This is a schematic diagram of the triangular reflection area of ​​a radar triangular reflector device according to the present invention;

[0022] Figure 4 This is a top view schematic diagram of a radar triangular reflector device according to the present invention;

[0023] Figure 5 This is a left-side view of the installation of the lifting rail of the radar triangular reflector device according to this utility model;

[0024] Figure 6 This is a right-side view of the installation of the lifting rail of the radar triangular reflector device according to this utility model;

[0025] Figure 7 This is a schematic diagram of the installation of a radar triangular reflector device with both lifting rail and left-right view.

[0026] Figure 8 This is a schematic diagram of the reflection of a radar triangular reflector device according to the present invention;

[0027] In the diagram: 1. First panel; 2. Second panel; 3. Third panel; 4. Clamp assembly; 401. Semi-circular clamp; 5. Connecting plate; 6. L-shaped connecting plate; 7. Connecting strip; 8. Right-angle connecting plate; 9. Semi-circular bayonet; 10. Notch; 11. Columnar target. Detailed Implementation

[0028] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0029] In the description of this utility model, it should be noted that the terms "middle," "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] like Figures 1 to 8As shown, a radar triangular reflector device includes a panel assembly. The panel assembly includes a first panel 1, a second panel 2, and a third panel 3 connected to each other. The first panel 1 and the second panel 2 are vertically disposed on the third panel 3, and the vertical sides of the first panel 1 and the second panel 2 are vertically connected together, forming a triangular reflective area. A connecting plate 5 is provided on the side of the first panel 1 and the second panel 2 facing away from the triangular reflective area. A clamping assembly 4 is provided on the connecting plate 5 and / or the third panel 3 at a position outside the triangular reflective area.

[0031] This radar triangular reflector device, through the arrangement of the panel assembly and the clamp assembly, can solve the compatibility problem in the prior art where reflectors cannot simultaneously meet the requirements of GNSS co-location observation of steel pipe pier targets, monitoring of street light targets, and monitoring of steel pipe structure tower targets. Moreover, the structure is simpler, the reflector has fewer joints, is easier to install and fix, has higher stability after fixing, requires less adjustment work, and has strong adaptability.

[0032] In this embodiment, the panel assembly is mounted on the cylindrical target via the clamp assembly. One or two sets of the panel assemblies are disposed on the cylindrical target, respectively adapted to the satellite's ascending and descending orbit heading angles. Figure 5 and 6 A set of triangular reflector devices is installed on each cylindrical target. Figure 7 Two sets of triangular reflector devices are installed on the cylindrical target. Figure 8 A simplified schematic diagram illustrates the radar's local incident angle entering the triangular reflector and being reflected back from the top. This diagram shows that when the radar's local incident angle is less than 45 degrees, the effective scattering size of the horizontal panel decreases, while the corresponding size of the vertical reflector panel increases. The columnar target can be a steel pipe pier, a lamppost, or a steel pipe tower, etc. The clamp assembly allows for direct adjustment of the azimuth angle and is suitable for installation on most columnar structures. The manufacturing process is simple, reducing on-site installation workload and creating a stable structure for reflecting radar waves.

[0033] This radar triangular reflector can adjust the locking position of the rotating clamp assembly according to the satellite's ascent and descent heading angle, allowing the radar waves emitted by the satellite to better penetrate the triangular reflection area, thus maximizing the radar wave reflection effect of the triangular reflector.

[0034] To address the issue of adapting to the local incident angle of satellites, the corner reflector does not adapt to the pitch angle by adding related joint components, but instead achieves optimal adaptation by adjusting the length ratio of the vertical and horizontal panels. This invention solves the technical problem in the prior art where reflectors cannot simultaneously meet the compatibility requirements of GNSS steel pipe marker co-location, street light co-location, and steel pipe structure tower co-location InSAR monitoring. Moreover, it has the advantages of simple structure, easy installation, high stability after fixing, and strong adaptability.

[0035] In this embodiment, the first panel 1 and the second panel 2 have a symmetrical structure, both being rectangular aluminum alloy plates. The long sides of the first panel 1 and the second panel 2 are connected horizontally, and bolts are driven in to make the first panel 1 and the second panel 2 form a 90° angle. The two short sides of the rectangular aluminum alloy plates have different lengths. The third panel 3 is installed at the position of the shorter side, and the third panel 3 is connected to both the first panel 1 and the second panel 2 at a 90° angle, and bolts are driven in to connect them. On the opposite side of the third panel 3, i.e., at the other short side of the first panel 1 and the second panel 2, the connecting plate 5 is placed and bolted to connect to the first panel 1 and the second panel 2. The connecting plate 5 also forms a 90° angle with both the first panel 1 and the second panel 2, meaning it is parallel to the third panel 3. The clamp assembly 4 is placed at the edge of the third panel 3 and the connecting plate 5, and bolts are driven in to connect the clamp assembly to the third panel and the connecting plate.

[0036] Furthermore, a pair of L-shaped connecting plates 6 are connected to the third panel 3, and the pair of L-shaped connecting plates 6 are respectively connected to the first panel 1 and the second panel 2.

[0037] The L-shaped connecting plate 6 allows for easy vertical mounting of the first panel 1 and the second panel 2 onto the third panel 3, facilitating the connection of bolts and other connecting parts in both directions.

[0038] Furthermore, the upper edges of the first panel 1 and the second panel 2 are respectively provided with connecting strips 7, which connect to the connecting plate 5. The connecting strips 7 facilitate the vertical connection of the connecting plate 5 to the outer edges of the first panel 1 and the second panel 2, ensuring that the connecting plate does not affect the triangular reflective area and also facilitating bolt connections in both directions.

[0039] The outline shape of the connecting plate 5 is the same as that of the third panel 3 excluding the area enclosed by the first and second panels (the triangular reflective area), and their sizes are also basically the same. The third panel 3 is a polygonal structure combining rectangles and trapezoids. The first panel and the second panel are arranged from positions close to the two right angles along a direction parallel to the angle bisectors. This arrangement ensures that the first panel and the second panel are necessarily perpendicular to each other.

[0040] Furthermore, the first panel 1 and the second panel 2 are connected by a right-angle connecting plate 8 disposed on the outer side. The right-angle connecting plate 8 is arranged vertically, which not only serves to connect the first panel 1 and the second panel 2, but also improves the connection strength and stability of the two panels.

[0041] Furthermore, the centerline of the clamp assembly 4 is located in the plane containing the angle bisector of the first panel 1 and the second panel 2. That is, the clamp assembly is respectively located at the middle edge of the connecting plate and the short plate of the third panel, and the upper and lower clamp assemblies are arranged coaxially to connect the same column target.

[0042] Furthermore, the clamp assembly 4 includes a pair of detachably connected semi-circular clamps 401, one of which is mounted on the connecting plate or the third panel 3. The connecting plate 5 and the third panel 3 are provided with semi-circular slots 9 corresponding to the semi-circular clamps 401.

[0043] Each of the two ends of the pair of semi-circular clamps 401 is provided with connecting ears. The pair of semi-circular clamps can be fastened by bolts. By adjusting the tightness of the bolts, the clamp assembly can be moved or rotated on the columnar target, thereby adjusting the height and orientation of the panel assembly.

[0044] During installation, the clamp assembly 4 is bolted to the semi-circular slot 9 of the connecting plate 5 and the third panel 3. Then, the triangular reflector with the semi-circular clamp is placed on a target with a cylindrical main structure, such as a steel pipe or street lamp. The azimuth angle is adjusted to be suitable for the stable reflection of radar waves by the triangular reflector. The other semi-circular clamp is bolted to fix the radar triangular reflector at the target position.

[0045] This radar triangular reflector device is installed on a cylindrical target to receive reflected radar waves. One to two triangular reflectors can be installed on the same cylindrical target as needed. When installing the triangular reflector, the long side of the base plate should be parallel to the line projected onto the horizontal direction of the satellite orbit to achieve optimal radar wave reflection. By installing it on GNSS steel pipe piers, coaxial observation for global navigation satellite system positioning can be achieved; by installing it on streetlight poles, steel towers, and other facilities, high-precision InSAR monitoring of these cylindrical targets can be achieved.

[0046] Furthermore, the first panel 1 and the second panel 2 have a notch 10 at the corner near the third panel 3. That is, the notch is located below the connection between the first panel 1 and the second panel 2. The notch 10 allows for drainage in rainy weather, preventing water accumulation in the triangular reflection area.

[0047] Furthermore, let the lengths of the right-angled sides connecting the first panel 1 and the second panel 2 to the third panel 3 be a, then: In the formula, σ represents the RCS of the triangular reflective region, i.e., the radar cross-section, and λ is the wavelength of the received radar wave. In actual use of corner reflectors, the radar scattering performance of the satellite can be evaluated by measuring the RCS value of the corner reflector. To achieve the corresponding RCS, it can be calculated using the RCS formula. By proportionally enlarging and reducing the right-angle side 'a' of the corner reflector, the optimal corner reflector size can be designed.

[0048] Panel size adjustment has the greatest impact on RCS. The larger the side length 'a' connecting the first and third panels, the larger the RCS (Radar cross-section). The pitch angle has a slightly weaker impact. The way to compensate for pitch angle attenuation is to rely on the ratio adjustment of the horizontal and vertical panels. The dimensions of the first, second, and third panels (base plate) are designed so that when the radar wave is emitted to the base plate of the corner reflector, the lengths of the first and second panels can ensure that the reflected radar wave can be reflected back to the first and second panels, so that the triangular reflector can achieve the maximum RCS effect. Figure 8 The diagram illustrates the effect of the local incident angle of the radar satellite on the dimensional ratio of the horizontal and vertical panels. The relevant calculations can be performed by referring to the RCS calculation formula for the triangular reflector in the radar manual.

[0049] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A radar triangular reflector device, characterized in that, The device includes a panel assembly comprising a first panel, a second panel, and a third panel that are interconnected. The first panel and the second panel are vertically disposed on the third panel, and the vertical sides of the first panel and the second panel are vertically connected together to form a triangular reflective area. A connecting plate is provided on the side of the first panel and the second panel facing away from the triangular reflective area. A clamping assembly is provided on the connecting plate and / or the third panel at a position outside the triangular reflective area.

2. The radar triangular reflector device according to claim 1, characterized in that, The third panel is connected to a pair of L-shaped connecting plates, which are respectively connected to the first panel and the second panel.

3. The radar triangular reflector device according to claim 1, characterized in that, The first panel and the second panel are arranged symmetrically and each has a connecting strip on its upper edge, the connecting strip connecting the connecting plate.

4. The radar triangular reflector device according to claim 1, characterized in that, The first panel and the second panel are connected by a right-angle connecting plate disposed on the outer side.

5. The radar triangular reflector device according to claim 1, characterized in that, The connecting plate is arranged parallel to the third panel. Both the first panel and the second panel are rectangular plates, and the short sides of the rectangular plates are connected to the connecting plate and the third panel, respectively.

6. The radar triangular reflector device according to claim 1, characterized in that, The centerline of the clamp assembly is located in the plane containing the bisector of the angle between the first panel and the second panel.

7. The radar triangular reflector device according to claim 1, characterized in that, The clamp assembly includes a pair of detachably connected semi-circular clamps, one of which is mounted on the connecting plate or the third panel. The connecting plate and the third panel are provided with semi-circular slots corresponding to the semi-circular clamps, which are used to connect columnar targets.

8. The radar triangular reflector device according to claim 1, characterized in that, The first panel and the second panel have notches at the corners near the third panel.

9. The radar triangular reflector device according to claim 1, characterized in that, The panel assembly is mounted on the cylindrical target via the clamp assembly. One or two sets of the panel assembly are provided on the cylindrical target to adapt to the satellite's orbital ascent and descent heading angles.

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