Array antenna synchronous rotation platform, array antenna and use method thereof

Abstract

The present invention proposes an array antenna synchronous rotation platform, an array antenna and a method of using the same to solve the problem of synchronous rotation of the antenna array. The synchronous rotation platform includes a plurality of circular tracks with the same central axis, and track flat cars are evenly distributed circumferentially on the circular tracks. A support shaft is provided at the central axis of the circular track, and a central platform is rotatably provided on the support shaft. The track flat car and the central platform are connected through a truss arm. The present invention drives the central platform to rotate by the track flat car, thereby avoiding excessive bending stress of the truss arm caused by the center drive, and at the same time avoids the use of gears for transmission, thereby avoiding gear contact fatigue accidents; and the antennas arranged on the track flat car are pointed in the same direction to ensure that the working state of the antenna array remains unchanged.

Description

Technical Field

[0001] The present invention relates to the technical field of array antennas, and in particular to an array antenna synchronous rotation platform, an array antenna and a use method thereof. Background Art

[0002] Shortwave antennas have advantages such as long propagation distance and low loss. In order to enhance the beam width of shortwave antennas, the commonly used method is to form an array of multiple antennas according to the set layout to achieve the actual needs of phase control and gain improvement. Log-periodic antennas are a type of shortwave antennas, and as a directional antenna, log-periodic antennas have extremely high directional gain. When using this antenna for array formation, it is generally required that it has 360° rotation to point in the communication direction, and the overall shape and direction of all antennas in the array must remain unchanged.

[0003] For log-periodic antennas, a certain installation height is generally required according to the communication distance, usually up to 24 meters. Since the wavelength of shortwave antennas is relatively long, the overall size of the antenna is relatively large. The commonly used shortwave band coverage basically reaches 24 meters × 27 meters. Therefore, it is difficult to rotate the antenna, and it is even more difficult to synchronize the rotation of multiple antennas. In addition, the antenna is an elevated antenna with a high windward height and a large windward surface. During the rotation process, the rotational inertia is large, resulting in a large overturning moment at the track, which is very likely to cause an accident. Summary of the invention

[0004] The present invention provides an array antenna synchronous rotation platform, an array antenna and a use method thereof to solve the problem of synchronous rotation of an antenna array.

[0005] The technical solution of the present invention is implemented as follows: a synchronous rotating platform for an array antenna includes a plurality of circular tracks with the same central axis, track flat cars are evenly distributed circumferentially on the circular tracks, a support shaft is provided at the central axis of the circular tracks, a central platform is rotatably provided on the support shaft, and the track flat car and the central platform are connected by a truss arm.

[0006] Furthermore, a working cabin is arranged on the central platform, and a walking path for entering the working cabin is arranged on the truss arm.

[0007] Furthermore, the rail flat car includes a car body, on which are provided running wheels that move along the circular track, the running wheels are T-shaped pulleys, the circular track is an I-shaped track, the flange of the running wheels is located on one side of the circular track, and an anti-overturning wheel is provided on the car body on the other side of the circular track.

[0008] Furthermore, there are two circular tracks, the flange of the running wheel is located between the two circular tracks, and the anti-overturning wheel is located on a side of the circular track away from the flange.

[0009] Furthermore, a tension spring is provided between the anti-tipping wheel and the running wheel, so that the anti-tipping wheel always rolls in close contact with the lower edge of the wing plate on the circular track.

[0010] Furthermore, a rail clamp is provided below the rail flat car, and the rail clamp is placed on the circular track.

[0011] Furthermore, a cleaning tenon is provided below the track flat car, and the cleaning tenon is used to clean the circular track.

[0012] Furthermore, an antenna anchoring position and an antenna support tower fixing position are provided above the rail flat car.

[0013] A method for using a synchronous rotating platform of an array antenna, wherein all track flat cars rotate synchronously in a circumferential direction along a circular track, and a central platform is driven to rotate along a supporting shaft through a truss arm.

[0014] An array antenna comprises the synchronous rotating platform.

[0015] Beneficial effects of the present invention:

[0016] Since the size of the shortwave antenna is relatively large, the size of the rotating platform needs to ensure that the rotating areas of each antenna cannot overlap, so the diameter of the rotating platform reaches more than 28 meters. The present invention drives the central platform to rotate by a rail flat car, and places the driving force for the rotation of the central platform on the rail flat car on the circular track to avoid excessive bending stress of the truss arm caused by the central drive. In addition, the existing logarithmic periodic antennas mostly use gear transmission mechanisms for rotation, which are prone to gear contact fatigue accidents. If used in outdoor open-air environments, impurities are easily introduced into the gears or the transmission is obstructed due to corrosion, causing blockage and jamming, affecting the normal operation of the gears. The synchronous rotating platform of the present invention does not have the above problems, avoiding gear contact fatigue accidents and gear jamming.

[0017] The synchronous rotating platform of the present invention is driven to rotate along a circular track by four self-powered track flat cars. During the rotation process, the antennas on the four track flat cars are pointed in the same direction, ensuring that the working state of the antenna array remains unchanged. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a structural schematic diagram of the synchronous rotation platform of the array antenna of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of the central platform;

[0021] Figure 3 It is a structural schematic diagram of a rail flat car;

[0022] Figure 4 It is a structural schematic diagram of the travel wheel;

[0023] Figure 5 Schematic diagram of the structure of the array antenna.

[0024] Circular track 1, track flat car 2, support shaft 3, central platform 4, truss arm 5, working cabin 6, walking walkway 7, vehicle body 8, walking wheel 9, anti-overturning wheel 10, driven wheel 11, driving wheel 12, tension spring 13, track clamp 14, antenna support tower fixing position 15, antenna anchor position 16, cleaning tenon 17. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] like Figure 1 and 2 As shown, a synchronous rotating platform for an array antenna includes a plurality of circular tracks 1 with the same central axis, track flat cars 2 are evenly distributed circumferentially on the circular track 1, a support shaft 3 is provided at the central axis of the circular track 1, a central platform 4 is rotatably provided on the support shaft 3, and the track flat cars 2 and the central platform 4 are connected by a truss arm 5.

[0027] There are two circular tracks 1, four track flat cars 2, truss arms 5 correspond to track flat cars 2 one by one, truss arms 5 extend from the central axis of the circular track 1 to the corresponding track flat cars 2, four truss arms 5 and four track flat cars 2 are fixedly connected together to form a cross structure, and the central platform 4 fixes the four truss arms 5 together. The platform frame composed of the four truss arms 5 and the central platform 4 can rotate around the support shaft 3. In order to reduce the load of the platform rotation, in this embodiment, the truss arms 5 adopt a lattice design to reduce the weight of the platform frame and reduce the output power of the motor of the track flat car 2.

[0028] In order to reduce the footprint of the entire rotating platform, a working cabin 6 is provided on the rotating platform. The rotating platform and antenna-related equipment and a transmitter group are arranged in the working cabin 6. A walking path 7 for entering the working cabin 6 is provided on the upper side of one of the truss arms 5 for the convenience of technicians. Walking paths 7 may also be provided on other truss arms 5 as needed.

[0029] like Figure 3 and 4 As shown, the rail flat car 2 includes a car body 8, on which are provided running wheels 9 that move along the circular track 1. The running wheels 9 are T-shaped pulleys, and the circular track 1 is an I-shaped track. The running wheels 9 roll on the upper end surface of the circular track 1, and the flange of the running wheels 9 is located on one side of the circular track 1. Since the overturning moment of the elevated antenna is large, in order to offset the overturning moment, an anti-overturning wheel 10 is provided on the car body 8 on the other side of the circular track 1.

[0030] The flange of the traveling wheel 9 is located between the two circular tracks 1, and the anti-tipping wheel 10 is located on the side of the circular track 1 away from the flange. The arrangement of the anti-tipping wheel 10 eliminates the need to set the anti-tipping wheel 10 between the two circular tracks 1, making it convenient to inspect and repair the anti-tipping wheel 10.

[0031] The travel wheel 9 includes three driven wheels 11 and one driving wheel 12. The driving wheel 12 is connected to the motor. The rotation axes of the driven wheels 11 and the driving wheel 12 point to the central axis of the circular track 1 to ensure that the driven wheels 11 and the driving wheel 12 can slide smoothly along the circular track 1.

[0032] The rail flat car 2 spans across two circular tracks 1, wherein two driven wheels 11 are located on the inner side of the rail flat car 2 and cooperate with the inner circular track 1, and a driving wheel 12 and a driven wheel 11 are located on the outer side of the rail flat car 2 and cooperate with the outer circular track 1. The inner sides of the two driven wheels 11 on the inner side of the rail flat car 2 are both provided with anti-tipping wheels 10, and the two anti-tipping wheels 10 roll along the lower edge of the upper wing plate of the inner circular track 1, and the inner sides of the driven wheels 11 and driving wheels 12 on the outer side of the rail flat car 2 are both provided with anti-tipping wheels 10, and the two anti-tipping wheels 10 roll along the lower edge of the upper wing plate of the outer circular track 1. Tension springs 13 are provided between all the anti-tipping wheels 10 of the rail flat car 2 and the corresponding driving wheels 12 or driven wheels 11, so that the anti-tipping wheels 10 always fit the lower edge of the upper wing plate of the circular track 1.

[0033] like Figure 5 As shown, a rail clamp 14 is provided on the lower side of the rail flat car 2, and the rail clamp 14 corresponds to the circular track 1 one by one. If there are two clamps, the rail clamp 14 is placed on the circular track 1 for braking the entire rotating platform.

[0034] An antenna support tower fixing position 15 is provided above the rail flat car 2 for installing the antenna. In order to improve the stability of the antenna, a plurality of antenna anchoring positions 16 are also provided above the rail flat car 2.

[0035] like Figure 3As shown, since the rotating platform is installed outdoors, in order to ensure the cleanliness of the circular track 1, a cleaning tenon 17 is further provided at the bottom of the track flat car 2, and cleaning tenons 17 are provided on both the front and rear sides of the traveling wheel 9 (including the driven wheel 11 and the driving wheel 12) in the traveling direction. The track is cleaned during the sliding process of the track flat car 2 along the circular track 1 to prevent the rotation of the track flat car 2 from being obstructed.

[0036] A method for using a synchronous rotating platform of an array antenna comprises the following steps: all track flat cars 2 are synchronously rotated circumferentially along a circular track 1, and a central platform 4 is driven to rotate along a support shaft 3 through a truss arm 5.

[0037] An array antenna comprises the synchronous rotating platform.

[0038] 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 principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An array antenna synchronous rotation platform, characterized in that: It comprises a plurality of circular tracks with the same central axis, track flat cars are evenly distributed in the circumferential direction on the circular tracks, a support shaft is arranged at the central axis of the circular tracks, a central platform is rotatably arranged on the support shaft, and the track flat cars and the central platform are connected through a truss arm; A working cabin is arranged on the central platform, and a walking path leading to the working cabin is arranged on the truss arm; The rail flat car comprises a car body, on which a running wheel is arranged to move along a circular track, the running wheel is a T-shaped pulley, the circular track is an I-shaped track, a flange of the running wheel is located on one side of the circular track, and an anti-overturning wheel is arranged on the car body on the other side of the circular track; There are two circular tracks, the flange of the running wheel is located between the two circular tracks, and the anti-tipping wheel is located on the side of the circular track away from the flange; a tension spring is provided between the anti-tipping wheel and the running wheel, so that the anti-tipping wheel always rolls against the lower edge of the upper wing plate of the circular track; The traveling wheels include three driven wheels and one driving wheel, the driving wheel is connected to the motor, and the rotation axis directions of the driven wheels and the driving wheels are all pointing to the central axis of the circular track; the track flat car spans two circular tracks, wherein the two driven wheels are located on the inner side of the track flat car and cooperate with the inner circular track, and one driving wheel and one driven wheel are located on the outer side of the track flat car and cooperate with the outer circular track; A track clamp is arranged at the bottom of the track flat car, and the track clamp is placed on the circular track; a cleaning tenon is arranged at the bottom of the track flat car, and the cleaning tenon is used to clean the circular track; an antenna anchor position and an antenna support tower fixing position are arranged above the track flat car.

2. The method for using the synchronous rotating platform of the array antenna according to claim 1, wherein all the track flat cars rotate synchronously along the circular track, and the central platform is driven to rotate along the support axis through the truss arm.

3. An array antenna comprising the synchronously rotating platform according to claim 1.

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