Real aperture radar

Abstract

The utility model discloses a real aperture radar, which belongs to the technical field of satellite antennas and comprises an antenna body, a radar main body, a pitching support frame, a direction adjusting mechanism and a support leg which are sequentially connected. The pitching supporting frame comprises a supporting plate and two supporting arms symmetrically arranged on the two sides of the supporting plate. The supporting arm is provided with an arc-shaped hole, the radar body is provided with a sliding block in sliding fit with the arc-shaped hole, and the supporting arm is further provided with a locking piece matched with the radar body. The supporting arm is provided with a plurality of first holes and a plurality of second holes which extend in different directions; the rotation center line of the arc-shaped hole is a pitching adjusting rotation shaft which coincides with the horizontal center line of the antenna body, and an orientation adjusting rotation shaft of the orientation adjusting mechanism coincides with the vertical center line of the antenna body, so that the pitching adjusting rotation shaft and the orientation adjusting rotation shaft intersect at the center of the diagonal line of the antenna surface of the antenna body. In this way, the adjusting mode is simple and convenient, abrasion of the direction adjusting mechanism can be reduced, power consumption is reduced, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of satellite antennas, in particular to a real aperture radar. Background Art

[0002] Various geological reasons (stratum lithology, topography, surface cover, etc.) and human activities (mines, mining, underground engineering, etc.) can induce landslides, collapses, mudslides and other slope collapse geological disasters, which all have different degrees of surface deformation during their occurrence and development. The core of landslide disaster early warning is to obtain slope deformation information through slope deformation monitoring, and then predict the location, area and time of landslides.

[0003] After the traditional global positioning system, total station and other manual contact methods and laser three-dimensional scanning methods, microwave remote sensing methods (such as L, X, Ku bands) that belong to the same electromagnetic spectrum as optics but have lower frequencies and longer wavelengths have developed rapidly in recent years due to their principle advantages of all-day, all-weather, long-distance and high-precision. They have become the representative of advanced and applicable technologies for slope deformation monitoring. Compared with traditional monitoring methods, microwave remote sensing technology has the advantages of wide monitoring range, non-contact measurement, and continuous spatial coverage, which is conducive to the determination of slope surface deformation areas and the prediction of overall deformation trends; compared with three-dimensional laser scanners and close-range photogrammetry technology, it has the advantages of long monitoring distance, high monitoring accuracy, and low impact of meteorological conditions (clouds, rain, fog, etc.).

[0004] However, most microwave radars currently use synthetic aperture radars, which are large, heavy, and have complex angle adjustment and data processing problems. Due to the use of synthetic aperture technology, they are easily affected by the environment and defocused, resulting in monitoring and reporting errors. In comparison, real aperture radars can directly obtain the three-dimensional deformation displacement of the target, which is more suitable for monitoring and early warning of large-scale high and steep slope landslides and emergency monitoring after landslide disasters to ensure the safety of rescue personnel. However, real aperture radars also have the problems of large size, heavy weight, and complex angle adjustment. Utility Model Content

[0005] The utility model aims to provide a real aperture radar to solve the problem of complex angle adjustment of existing microwave radars.

[0006] The technical solution of the utility model to solve the above technical problems is as follows:

[0007] A real aperture radar comprises: an antenna body, a radar main body arranged on the back side of the antenna body, a pitch support frame connected to the radar main body, an azimuth adjustment mechanism connected to the bottom of the pitch support frame, and a support leg connected to the bottom of the azimuth adjustment mechanism;

[0008] The pitch support frame includes a horizontally arranged support plate and two vertically arranged support arms, the two support arms are symmetrically arranged on both sides of the support plate, so that the support frame is U-shaped as a whole; the support arm is provided with an arc hole, the radar body is provided with a sliding block that slidably cooperates with the arc hole, which is used to adjust the pitch angle of the antenna body, and the support arm is also provided with a locking piece that cooperates with the radar body, which is used to lock the pitch angle of the antenna body; the support arm is provided with a plurality of first holes and a plurality of second holes extending in different directions;

[0009] The rotation centerline of the arc hole is the pitch adjustment rotation axis, which coincides with the horizontal centerline of the antenna body. The azimuth adjustment rotation axis of the azimuth adjustment mechanism coincides with the vertical centerline of the antenna body, so that the pitch adjustment rotation axis and the azimuth adjustment rotation axis intersect at the diagonal center of the antenna surface of the antenna body.

[0010] Furthermore, a supporting portion is provided at the top of the supporting arm, and the arc-shaped hole and the locking piece are arranged on the supporting portion; the two supporting portions are symmetrically arranged on both sides of the radar body with respect to the vertical center plane of the antenna body.

[0011] Furthermore, the above-mentioned support arm includes a vertical portion and an inclined portion; the support portion is formed at the top of the vertical portion, the bottom of the vertical portion is connected to the top of the inclined portion, the bottom of the inclined portion is connected to the support plate, and the bottoms of the inclined portions of the two support arms are close to each other.

[0012] Furthermore, the first hole is formed on the vertical portion, and the second hole is formed on the inclined portion.

[0013] Furthermore, the opening direction of the first hole is parallel to the plane where the two vertical portions are located; the opening direction of the second hole is perpendicular to the plane where the two inclined portions are located.

[0014] Furthermore, the first hole and the second hole are through holes; or the first hole and the second hole are blind holes, and the depth of the first hole and the second hole is not less than 4 / 5 of the thickness of the corresponding structure in the opening direction.

[0015] Furthermore, the radar body is provided with a plurality of locking holes cooperating with the locking piece, and at least includes positions corresponding to the lower and upper limits of the pitch angle adjustment. The locking piece cooperates with the locking hole to fix the sliding block in the arc hole to lock the pitch angle of the antenna body.

[0016] Furthermore, the locking member is a self-locking spring pin.

[0017] Furthermore, the above-mentioned orientation adjustment mechanism is connected to the support leg through a support column.

[0018] The utility model has the following beneficial effects:

[0019] (1) The utility model sets the pitch adjustment rotation axis in a horizontal position and makes it located on the antenna surface of the antenna body. That is, when adjusting the pitch angle, the antenna body can be rotated around itself. The adjustment method is simple and convenient. In addition, the pitch adjustment rotation axis and the azimuth adjustment rotation axis intersect at a point on the antenna surface of the antenna body at 90 degrees, thereby reducing the wear of the azimuth adjustment mechanism, reducing power consumption, and extending the service life.

[0020] (2) The pitch adjustment rotation axis and the azimuth adjustment rotation axis of the utility model intersect at the diagonal center of the antenna surface of the antenna body, which provides a good reference for the alignment and fusion of the scanning data after azimuth adjustment and pitch adjustment, greatly reduces the processing difficulty and resource overhead of the radar algorithm, and improves the data processing speed.

[0021] (3) The utility model is provided with a plurality of first holes and a plurality of second holes on the support arm, and the extension directions of the first holes and the second holes are perpendicular to each other, which can reduce the weight to the greatest extent while ensuring the structural strength, thereby reducing the weight of the real aperture radar.

[0022] (4) The real aperture radar of the present invention has the advantages of simple structure, few components, light weight, easy assembly and disassembly, and simple operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the real aperture radar of the utility model;

[0024] Figure 2 It is a schematic diagram of the connection structure of the antenna body, radar body, pitch support frame, azimuth adjustment mechanism and support column of the utility model;

[0025] Figure 3 It is a schematic diagram of the connection structure of the antenna body, radar body and pitch support frame of the utility model;

[0026] Figure 4 It is a schematic diagram of the connection between the support part and the radar body of the utility model;

[0027] Figure 5 This is a schematic diagram of the pitch adjustment principle of the antenna body of the utility model.

[0028] In the figure: 10-antenna body; 11-antenna surface; 12-radome; 20-radar body; 21-sliding block; 30-pitch support frame; 31-arc hole; 32-locking piece; 33-support plate; 34-support arm; 35-support part; 40-azimuth adjustment mechanism; 50-support leg; 60-support column; 341-vertical part; 342-inclined part; 343-first hole; 344-second hole. DETAILED DESCRIPTION

[0029] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0030] Please refer to Figure 1 The present embodiment provides a real aperture radar, comprising: an antenna body 10, a radar body 20, a pitch support frame 30, an azimuth adjustment mechanism 40 and a support leg 50. The antenna body 10 comprises a radome 12 and an antenna surface 11 arranged in the radome 12. The radar body 20 is fixedly connected to the back side of the antenna body 10. The top of the pitch support frame 30 is fixedly connected to both sides of the radar body 20, and the pitch support frame 30 and the radar body 20 can move relative to each other to achieve the pitch angle adjustment of the antenna body 10. The azimuth adjustment mechanism 40 is fixedly connected to the bottom of the pitch support frame 30, and at the same time, the azimuth adjustment mechanism 40 is located below the antenna body 10, and is used to adjust the azimuth angle of the antenna body 10. The support leg 50 is located below the azimuth adjustment mechanism 40 and is fixedly connected to the azimuth adjustment mechanism 40 through a support column 60. The fixed connection structure at each position is preferably detachably connected, such as bolted, so as to facilitate the disassembly, assembly and carrying of the real aperture radar.

[0031] The antenna body 10 is a true aperture radar antenna, which requires less space for the deployment of the entire radar, has a wide deployment range, and is easy to carry and install, which can improve the environmental applicability of the radar. The radar body 20 is mainly used to install a circuit board including a transceiver component, signal processing, etc., control the azimuth motor to achieve azimuth changes, control the radar to transmit signals toward the target area and collect echo signals, and then perform data processing to obtain deformation data of the target area. The azimuth adjustment mechanism 40 belongs to the prior art and will not be described here. The support leg 50 can adopt any support leg structure that can support the true aperture radar, such as a split retractable support leg, an integrated retractable support leg, a telescopic support leg, etc. The number of support legs is greater than or equal to 3, and they are evenly spaced along the circumference.

[0032] Please refer to Figures 2 to 5 The pitch support frame 30 includes a horizontally arranged support plate 33 and two vertically arranged support arms 34, so that the support frame 30 is U-shaped as a whole. The support plate 33 is located below the antenna body 10, and the two support arms 34 are arranged on the corresponding sides of the support plate 33 and are symmetrical about the horizontal center plane of the support plate 33. In this embodiment, the two support arms 34 can be integrally formed with the support plate 33, or can be separately connected, and the connection methods include but are not limited to bolt connection, welding, etc.

[0033] The support arm 34 includes a vertical portion 341 and an inclined portion 342. The top of the vertical portion 341 is provided with a support portion 35. The bottom of the vertical portion 341 is connected to the top of the inclined portion 342, and the bottom of the inclined portion 342 is connected to the support plate 33. The support portions 35 of the two support arms 34 are respectively connected to the corresponding two sides of the radar body 20. In other embodiments of the utility model, the two support arms 34 can also be connected to the middle of the support plate 33, as long as the two support arms 34 are symmetrically arranged; obviously, the support arm 34 can also be in a strip shape, an arc shape, etc. as a whole.

[0034] In this embodiment, the bottoms of the two inclined portions 342 are close to each other, and the two vertical portions 341 and the two inclined portions 342 are located on the same plane. At the same time, the two support arms 34 are symmetrically arranged with respect to the vertical center plane of the antenna body 10 and the radar body 20, that is, the two support portions 35 are symmetrically arranged with respect to the vertical center plane of the antenna body 10, that is, the connection structure between the two support portions 35 and the radar body 20 is also symmetrical.

[0035] The support portion 35 is provided with an arc hole 31, which is an arc-shaped through hole, and its extension direction is toward the radar body 20, that is, the inner side of the arc hole 31 is toward the antenna body 10. The radar body 20 is provided with a sliding block 21, and the sliding block 21 is slidably arranged in the corresponding arc hole 31. The sliding of the sliding block 21 in the arc hole 31 makes the antenna body 10 rotate with the radar body 20, so as to adjust the pitch angle. The support portion 35 is also provided with a locking member 32. The radar body 20 is provided with a plurality of locking holes (not shown) that cooperate with the locking member 32. The locking holes at least include positions corresponding to the lower limit and upper limit of the pitch angle adjustment, that is, each locking hole corresponds to a pitch angle, and the pitch angle of the antenna body 10 is locked by the locking member 32.

[0036] In this embodiment, the overall cross-section of the sliding block 21 is non-circular to prevent the sliding block 21 from rotating in the arc hole 31; such as an arc block with the same curvature as the arc hole 31, or a plurality of rotating pins arranged in an arc (the curvature is consistent with the curvature of the arc hole 31). At this time, the sliding friction between the sliding block 21 and the arc hole 31 is converted into rolling friction between the rotating pin and the arc hole 31, thereby reducing the friction force and improving the smoothness of movement; the locking piece 32 adopts a self-locking spring pin. Obviously, the locking piece 32 can also adopt any component that can cooperate with the locking hole to lock the pitch angle, such as a screw with a bare rod at the front end.

[0037] Please refer to Figure 5The rotation centerline of the arc hole 31 is the pitch adjustment rotation axis, which is located in a horizontal position and on the antenna surface 11 of the antenna body 10. When adjusting the pitch angle, the antenna body 10 can rotate around itself, and the adjustment method is simple and convenient. The azimuth adjustment rotation axis of the azimuth adjustment mechanism 40 is located in the vertical direction and on the antenna surface 11 of the antenna body 10, that is, the pitch adjustment rotation axis and the azimuth adjustment rotation axis intersect at a point on the antenna surface 11 of the antenna body 10, thereby reducing the wear of the azimuth adjustment mechanism 40, reducing power consumption, and extending the service life.

[0038] Preferably, the pitch adjustment rotation axis is located at the horizontal center line of the antenna surface 11 of the antenna body 10, that is, the pitch adjustment rotation axis and the azimuth adjustment rotation axis intersect at the diagonal center of the antenna surface 11 of the antenna body 10. The intersection of the pitch adjustment rotation axis and the azimuth adjustment rotation axis can be used as the coordinate origin of the real aperture radar during data processing, the pitch adjustment rotation axis is used as the X-axis, the azimuth adjustment rotation axis is recorded as the Z-axis, and the direction of the antenna surface pointing to the target area is recorded as the Y-axis. According to the right-hand rule, a spatial rectangular coordinate system O-XYZ is established. Since the coordinate origin is set at the diagonal center of the antenna surface (that is, the geometric center), when the real aperture radar changes the pitch angle and azimuth angle, since the coordinate relationship between each antenna unit on the antenna surface and the geometric center of the antenna surface is known and simple, it is easy to determine the positional relationship between each antenna unit and the target area after the pitch angle and azimuth angle are changed, which provides a good benchmark for the alignment and fusion of the scanning data after the azimuth adjustment and pitch adjustment, greatly reduces the processing difficulty and resource overhead of the radar algorithm, and improves the data processing speed.

[0039] Please refer to Figure 2 and Figure 3 The vertical portion 341 is provided with a plurality of first holes 343, and the inclined portion 342 is provided with a plurality of second holes 344. The first holes 343 and the second holes 344 are used to reduce the weight of the pitch support frame 30, thereby reducing the overall weight of the real aperture radar.

[0040] In this embodiment, the opening direction of the first hole 343 is parallel to the plane where the two vertical portions 341 are located; the opening direction of the second hole 344 is perpendicular to the plane where the two inclined portions 342 are located, that is, the extension directions of the first hole 343 and the second hole 344 are perpendicular to each other. Under the same weight reduction conditions, the support arm 34 can obtain a relatively higher structural strength.

[0041] The first holes 343 can all be through holes, can all be blind holes, or can be partially blind holes, and the second holes 344 can all be through holes, can all be blind holes, or can be partially blind holes. When the first holes 343 or the second holes 344 are blind holes, the depth is not less than 4 / 5 of the thickness of the corresponding structure (corresponding vertical part or corresponding inclined part) in the opening direction, ensuring that both weight reduction and good structural strength can be achieved.

[0042] In other embodiments of the present invention, when the support arm 34 is in a strip shape, an arc shape, etc., the first hole 343 may be provided in a section close to the support portion 35 , and the second hole 344 may be provided in another section.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A real aperture radar, characterized in that: include: An antenna body (10), a radar body (20) arranged on the back side of the antenna body (10), a pitch support frame (30) connected to the radar body (20), an azimuth adjustment mechanism (40) connected to the bottom of the pitch support frame (30), and a support leg (50) connected to the bottom of the azimuth adjustment mechanism (40); The pitch support frame (30) comprises a horizontally arranged support plate (33) and two vertically arranged support arms (34), the two support arms (34) being symmetrically arranged on both sides of the support plate (33), so that the support frame (30) is U-shaped as a whole; the support arm (34) is provided with an arc-shaped hole (31), the radar body (20) is provided with a sliding block (21) slidably matched with the arc-shaped hole (31) for adjusting the pitch angle of the antenna body (10), and the support arm (34) is also provided with a locking piece (32) matched with the radar body (20) for locking the pitch angle of the antenna body (10); the support arm (34) is provided with a plurality of first holes (343) and a plurality of second holes (344) extending in different directions; The rotation centerline of the arc-shaped hole (31) is the pitch adjustment rotation axis, which coincides with the horizontal centerline of the antenna body (10), and the azimuth adjustment rotation axis of the azimuth adjustment mechanism (40) coincides with the vertical centerline of the antenna body (10), so that the pitch adjustment rotation axis and the azimuth adjustment rotation axis intersect at the diagonal center of the antenna surface (11) of the antenna body (10).

2. The real aperture radar according to claim 1, characterized in that: A supporting portion (35) is provided at the top of the supporting arm (34), and the arc-shaped hole (31) and the locking member (32) are arranged on the supporting portion (35); the two supporting portions (35) are symmetrically arranged on both sides of the radar body (20) with respect to the vertical center plane of the antenna body (10).

3. The real aperture radar according to claim 2, characterized in that: The support arm (34) comprises a vertical portion (341) and an inclined portion (342); the support portion (35) is formed at the top of the vertical portion (341), the bottom of the vertical portion (341) is connected to the top of the inclined portion (342), the bottom of the inclined portion (342) is connected to the support plate (33), and the bottoms of the inclined portions (342) of the two support arms (34) are close to each other.

4. The real aperture radar according to claim 3, characterized in that: The first hole (343) is formed on the vertical portion (341), and the second hole (344) is formed on the inclined portion (342).

5. The real aperture radar according to claim 4, characterized in that: The opening direction of the first hole (343) is parallel to the plane where the two vertical portions (341) are located; and the opening direction of the second hole (344) is perpendicular to the plane where the two inclined portions (342) are located.

6. The real aperture radar according to claim 5, characterized in that: The first hole (343) and the second hole (344) are through holes; or the first hole (343) and the second hole (344) are blind holes, and the depth of the first hole (343) and the second hole (344) is not less than 4 / 5 of the thickness of the corresponding structure in the opening direction.

7. The real aperture radar according to claim 1, characterized in that: The radar body (20) is provided with a plurality of locking holes that cooperate with the locking member (32), and at least include positions corresponding to a lower limit and an upper limit of pitch angle adjustment. The locking member (32) cooperates with the locking holes to fix the sliding block (21) in the arc-shaped hole (31) to lock the pitch angle of the antenna body (10).

8. The real aperture radar according to claim 7, characterized in that: The locking member (32) is a self-locking spring pin.

9. The real aperture radar according to any one of claims 1 to 8, characterized in that: The orientation adjustment mechanism (40) is connected to the support leg (50) via a support column (60).

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