Radar antenna zero calibration device

Abstract

The utility model relates to radar antenna zero position calibration device technical field, proposed radar antenna zero position calibration device, including support, install the base on the support, the upper surface of base installs the stand, the top of stand is rotatoryly installed with zero position rotation motor through the pivot, the rotatory output pedestal of zero position rotation motor is detachably connected with the replacement platform, the center of replacement platform upper surface installs the level gauge, the replacement platform sets up as the square, two adjacent corners on the replacement platform all install a group of pull rod. Through the above technical scheme, the problem that the adjustment efficiency of azimuth zero value and pitch zero position is low and the accuracy cannot be guaranteed in the zero position calibration link of radar antenna in the prior art is solved.

Description

Technical Field

[0001] This utility model relates to the technical field of radar antenna zero-position calibration devices, specifically, to radar antenna zero-position calibration devices. Background Technology

[0002] The zero point of a radar antenna is the output value of the azimuth encoder when the mechanical shaft points to the specified zero-point direction (usually astronomical north) after the antenna mount has been properly leveled. This output value is set to zero and forms the basis for antenna calibration, used for subsequent signal processing and target localization. Zero-point calibration of the radar antenna is a crucial step in ensuring the measurement accuracy of the radar system, primarily involving the adjustment of the azimuth and elevation zero points. Without auxiliary tooling, zero-point calibration of the radar antenna would be extremely labor-intensive and time-consuming, inefficient, and unable to guarantee accuracy. Utility Model Content

[0003] This invention proposes a radar antenna zero-position calibration device, which solves the problems of low adjustment efficiency and inability to guarantee accuracy in the zero-position calibration process of radar antennas in related technologies.

[0004] The technical solution of this utility model is as follows: a radar antenna null calibration device, including a bracket, a base mounted on the bracket, a stand mounted on the upper surface of the base, a null rotary motor rotatably mounted on the top of the stand via a rotating shaft, a replacement platform detachably connected to the rotation output base of the null rotary motor, a level mounted at the center of the upper surface of the replacement platform, the replacement platform being configured as a regular quadrilateral, a set of pull rods mounted on each of the two adjacent corners of the replacement platform, two mutually perpendicular guide rails fixedly connected to the upper surface of the base, ball joint bases mounted on the top and bottom of the pull rods, a pitch adjustment assembly detachably mounted on the guide rails, the ball joint bases at the top of the same group of pull rods being clustered and fixedly mounted on the bottom of the replacement platform, the ball joint bases at the bottom of the same group of pull rods being dispersed and driven onto the pitch adjustment assembly, the pitch adjustment assembly adjusting the pitch angle of the replacement platform by controlling the pull rods.

[0005] Preferably, a tensile tester for measuring the rotor torque of the zero-position rotary motor is also installed at one of the corners of the replacement platform. The torque of the motor rotation is measured during radar antenna zero-position calibration, mainly to eliminate magnetic field interference and mechanical deviation, and to ensure the zero-position alignment accuracy of the antenna rotor and stator.

[0006] Preferably, the pitch adjustment assembly includes two movable boxes, each of which is slidably connected to the guide rail and is fixed to the guide rail by a pin. A bidirectional threaded rod is slidably connected between the two movable boxes. The bottom end of the ball head base is threaded onto the outer side wall of both ends of the bidirectional threaded rod, and the ball head base is slidably connected to the guide rail.

[0007] Preferably, a limiting piece is fixedly connected to the outer wall of the ball head base, and the limiting piece is adapted to the shape of the guide rail and slidably connected to the outer wall of the guide rail.

[0008] Preferably, a sliding square column is rotatably sleeved on the outer side wall of both ends of the bidirectional threaded rod, and a square sliding sleeve is installed on the side wall of the movable box. The movable box is slidably sleeved on the outer side wall of the sliding square column through the square sliding sleeve.

[0009] Preferably, both ends of the sliding square column are fixedly connected to limit rings, and the side walls of the square sliding sleeve are all equipped with locking structures.

[0010] The beneficial effects of this utility model are as follows: 1. In this utility model, the replacement platform is equipped with a level. The two tie rods are brought closer together or separated by a single pitch adjustment component to adjust the pitch angle of the replacement platform. After the zero-position rotary motor is calibrated to the horizontal, the zero position after calibration is recorded by the acquisition module on the zero-position rotary motor. The radar antenna is then installed in the position of the replacement platform. This design can assist in the efficient zero-position calibration work. 2. In this utility model, by setting up a pitch adjustment component, the movable box and the limiting plate are adapted to the guide rail. The pitch adjustment component and the pull rod can be removed as a whole with the replacement platform. The movable box is slidably connected to the sliding square column, the square sliding sleeve and the bidirectional threaded rod. The movable box and the bidirectional threaded rod can be adjusted in position, making it more convenient to select the insertion hole on the guide rail for positioning and installation when fixing the movable box. It is easy to disassemble and assemble. Attached Figure Description

[0011] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0012] Figure 1 This is a perspective view of the entire utility model; Figure 2 This is a partial three-dimensional view of the structure of this utility model; Figure 3 This is an exploded view of the present invention; Figure 4 This is an exploded view of the pitch adjustment component in this utility model.

[0013] In the diagram: 1. Bracket; 2. Abutment; 3. Erecting the frame; 4. Guide rail; 5. Replacement platform; 51. Level; 52. Tensile testing instrument; 6. Zero-position rotary motor; 61. Rotary output base; 7. Pull rod; 71. Ball head base; 8. Pitch adjustment assembly; 81. Movable box; 82. Pin; 83. Two-way threaded rod; 84. Limiting plate; 85. Sliding square column; 86. Square sliding sleeve. Detailed Implementation

[0014] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model. Example 1

[0015] like Figures 1-4 As shown, this embodiment proposes a radar antenna null calibration device, including a bracket 1, a base 2 mounted on the bracket 1, a support frame 3 mounted on the upper surface of the base 2, a null rotary motor 6 rotatably mounted on the top of the support frame 3 via a rotating shaft, a replacement platform 5 detachably connected to the rotation output base 61 of the null rotary motor 6, a level 51 mounted at the center of the upper surface of the replacement platform 5, the replacement platform 5 being a regular quadrilateral, and a set of [unclear - possibly a reference to a specific device or equipment] mounted at each of two adjacent corners of the replacement platform 5. The tie rod 7 has two guide rails 4 arranged perpendicularly to each other fixedly connected to its upper surface. Ball head bases 71 are installed at the top and bottom of the tie rod 7. A pitch adjustment component 8 is detachably installed on the guide rail 4. The ball head bases 71 at the top of the tie rod 7 are clustered together and fixedly installed at the bottom of the replacement platform 5. The ball head bases 71 at the bottom of the tie rod 7 are dispersed and driven to be installed on the pitch adjustment component 8. The pitch adjustment component 8 adjusts the pitch angle of the replacement platform 5 by controlling the tie rod 7.

[0016] The replacement platform 5 is also equipped with a tensile tester 52 at one of its corners for measuring the rotor torque of the zero-position rotary motor 6. The torque of the motor rotation is measured during radar antenna zero-position calibration, mainly to eliminate magnetic field interference and mechanical deviation, and to ensure the zero-position alignment accuracy of the antenna rotor and stator. The pitch adjustment assembly 8 includes two movable boxes 81, both of which are slidably connected to the guide rail 4. The movable boxes 81 are movably fixed to the guide rail 4 by a pin 82. A bidirectional threaded rod 83 is slidably connected between the two movable boxes 81. The bottom end of the ball head base 71 is threaded onto the outer side wall of both ends of the bidirectional threaded rod 83. The ball head base 71 is slidably connected to the guide rail 4. A limiting piece 84 is fixedly connected to the outer wall of the ball head base 71. The limiting piece 84 is adapted to the shape of the guide rail 4 and is slidably connected to the outer wall of the guide rail 4. When the bidirectional threaded rod 83 rotates, the limiting piece 84 is tightly attached to the guide rail 4 for limiting. Thus, when the bidirectional threaded rod 83 rotates, the two ball head bases 71 move relative to each other through the threaded groove. The limiting piece 84 is adapted to the shape of the guide rail 4, so that the limiting piece 84 slides along the guide rail 4 along the outer surface of the guide rail 4.

[0017] In this embodiment, when adjusting the pitch angle of the replacement platform 5, the pitch adjustment component 8 on one guide rail 4 controls a set of pull rods 7 separately. When rotating the bidirectional threaded rod 83, since the limiting piece 84 is in close contact with the surface of the guide rail 4, the two ball head bases 71 on the same bidirectional threaded rod 83 move relative to each other through the threaded transmission, and the bottom feet of the two pull rods 7 in the same group move relative to each other. Thus, the top of the pull rod 7 drives one corner of the replacement platform 5 to rise and fall. Under the cooperation of the two sets of pitch adjustment components 8, the replacement platform 5 is adjusted to a horizontal state according to the level 51. When the pitch angle of the replacement platform 5 changes, the zero position rotary motor 6 is rotated and changed by rotating the output base 61. When the replacement platform 5 finds the zero position, the data acquisition module on the zero position rotary motor 6 records the zero position. Then, remove the replacement platform 5 from the level 51, and pull the pin 82 away from the guide rail 4 and the movable box 81. The pitch adjustment assembly 8 can then be removed from the guide rail 4. Figure 3 In this process, the replacement platform 5, the pull rod 7, and the pitch adjustment assembly 8 can be efficiently removed as a whole. Then, the radar antenna is installed on the rotating output base 61 to replace the position of the replacement platform 5. Since the zero-position rotary motor 6 records the zero-position data, after the radar antenna is installed, the radar antenna can be quickly zeroed according to the recorded data, thus completing the efficient radar antenna zero-position calibration work. Example 2

[0018] like Figure 2 and Figure 4As shown, based on the same concept as Embodiment 1 above, this embodiment further proposes that sliding square columns 85 are rotatably sleeved on the outer walls of both ends of the bidirectional threaded rod 83, and square sliding sleeves 86 are installed on the side walls of the movable box 81. The movable box 81 is slidably sleeved on the outer walls of the sliding square columns 85 through the square sliding sleeves 86, so that the movable box 81 can adjust its position relative to the bidirectional threaded rod 83, thereby facilitating the movable box 81 to find its position on the guide rail 4 and insert into the corresponding insertion hole on the guide rail 4 through the pin 82; both ends of the sliding square column 85 are fixedly connected with limit rings, and the side walls of the square sliding sleeves 86 are installed with locking structures. After the movable box 81 is installed on the guide rail 4, the sliding square column 85 is pulled by one end of the bidirectional threaded rod 83 to slide in the square sliding sleeve 86, and is pressed against the end face of the square sliding sleeve 86 by the limit ring, and the position of the square sliding sleeve 86 relative to the sliding square column 85 is fixed by the locking structure, thereby fixing the position of the bidirectional threaded rod 83.

[0019] In this embodiment, the sliding square post 85 and the square sliding sleeve 86 are used to adjust the position of the movable box 81 on the bidirectional threaded rod 83, so that after the pin 82 passes through the movable box 81, the position of the movable box 81 can be adjusted so that the pin 82 can be accurately inserted into the adjacent socket on the guide rail 4. The movable box 81 can be adjusted to the position of the movable box 81 and the adjacent socket on the guide rail 4 by sliding the square sliding sleeve 86 on the sliding square post 85, and then fixed by the locking screw provided on the square sliding sleeve 86, so that the pitch adjustment component 8 can be installed on different guide rails 4 with sockets.

[0020] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A radar antenna null calibration device, comprising a support (1), wherein a base (2) is mounted on the support (1), characterized in that, A support frame (3) is mounted on the upper surface of the base (2). A zero-position rotary motor (6) is rotatably mounted on the top of the support frame (3) via a rotating shaft. A replacement platform (5) is detachably connected to the rotation output base (61) of the zero-position rotary motor (6). A level (51) is mounted at the center of the upper surface of the replacement platform (5). The replacement platform (5) is set as a regular quadrilateral. A set of tie rods (7) is installed on each of the two adjacent corners of the replacement platform (5). Two phases are fixedly connected to the upper surface of the base (2). The guide rails (4) are arranged perpendicularly to each other. Ball head bases (71) are installed at the top and bottom of the pull rods (7). A pitch adjustment assembly (8) is detachably installed on the guide rails (4). The ball head bases (71) at the top of the pull rods (7) in the same group are clustered together and fixedly installed at the bottom of the replacement platform (5). The ball head bases (71) at the bottom of the pull rods (7) in the same group are dispersed and driven to be installed on the pitch adjustment assembly (8). The pitch adjustment assembly (8) adjusts the pitch angle of the replacement platform (5) by controlling the pull rods (7).

2. The radar antenna null calibration device according to claim 1, characterized in that, The replacement platform (5) is also equipped with a tensile tester (52) for measuring the rotor torque of the zero-position rotary motor (6) at one of the corners. The torque of the motor rotation is measured during radar antenna zero-position calibration, mainly to eliminate magnetic field interference and mechanical deviation, and to ensure the zero-position alignment accuracy of the antenna rotor and stator.

3. The radar antenna null calibration device according to claim 1, characterized in that, The pitch adjustment assembly (8) includes two movable boxes (81), both of which are slidably connected to the guide rail (4). The movable boxes (81) are movably fixed to the guide rail (4) by a pin (82). A bidirectional threaded rod (83) is slidably connected between the two movable boxes (81). The bottom end of the ball head base (71) is threaded onto the outer side wall of both ends of the bidirectional threaded rod (83). The ball head base (71) is slidably connected to the guide rail (4).

4. The radar antenna null calibration device according to claim 3, characterized in that, A limiting piece (84) is fixedly connected to the outer wall of the ball head base (71). The limiting piece (84) is adapted to the shape of the guide rail (4) and is slidably connected to the outer wall of the guide rail (4).

5. The radar antenna null calibration device according to claim 3, characterized in that, The outer walls at both ends of the bidirectional threaded rod (83) are rotatably fitted with sliding square columns (85), and the side walls of the movable box (81) are fitted with square sliding sleeves (86). The movable box (81) is slidably fitted onto the outer walls of the sliding square columns (85) through the square sliding sleeves (86).

6. The radar antenna null calibration device according to claim 5, characterized in that, Both ends of the sliding square column (85) are fixedly connected with limit rings, and the side walls of the square sliding sleeve (86) are all equipped with locking structures.

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