A large aperture radio circular surface antenna system capable of fast rotation and a method of using the same

Abstract

The application relates to the technical field of antenna using reflecting surfaces, and discloses a large-diameter radio circular surface antenna system capable of being quickly rotated and a use method thereof, which comprises a circular surface antenna and a base station, the circular surface antenna is connected with the base station through a spherical hinge, a ball seat in the spherical hinge is arranged at the top center of the base station, a ball head is fixed at the bottom of the circular surface antenna and located on a main shaft of the circular surface antenna; the ball head extends downward along the main shaft direction of the circular surface antenna to form an extension column, an adjusting rope for adjusting the posture of the circular surface antenna is arranged between the extension column and the base station, the adjusting ropes are arranged in a radial manner with the extension column as the center, one end of each adjusting rope is fixed on the extension column and the other end is wound on an electric winch fixedly connected with the base station. In the application, the adjustment of the azimuth angle and the elevation angle can be simultaneously performed, and the damping is arranged in the light and small component, that is, the adjusting rope, instead of the spherical hinge, so that only a very low damping strength is needed, and the influence on the adjustment speed is small. In conclusion, the antenna is rotated faster because the adjustment is only needed once and the adjustment is faster.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of antenna technology using reflector, in particular to a large aperture radio dish antenna system capable of fast rotation and a method for using the same. BACKGROUND

[0002] Radio dish antenna is a kind of antenna required by radar and radio telescope, which uses a huge area to focus the received electromagnetic wave signals, so as to distinguish extremely weak electromagnetic wave signals. At the same time, the radio dish antenna can also reversely emit electromagnetic wave signals from the emitter matched with the antenna to the direction where the main shaft of the antenna points.

[0003] However, it is obvious that the radio dish antenna can only effectively play a role when it is directly opposite to the target (i.e. the main shaft of the antenna points to the target), and at other times the electromagnetic wave cannot effectively reach the main reflecting surface of the antenna. Therefore, the radio dish antenna needs to adjust its main shaft direction to ensure that it is directly opposite to the target, and the adjustment process is carried out by means of a servo system, and the two variables to be adjusted are the pitch angle and the azimuth angle of the main shaft of the antenna.

[0004] For a small aperture radio dish antenna, such as the antenna of a tracking radar, since the self-weight is small, the servo system can be freely selected, and it is easy to achieve fast tracking of the target. For a large aperture radio dish antenna, the servo system almost has only one choice, i.e. to be made into a structure similar to the turret of a tank gun or a naval gun, which is composed of two rotating mechanisms with vertical rotating shafts. One rotating mechanism is a race that can rotate around a vertical rotating shaft, which is used to control the azimuth angle of the main shaft of the antenna; the other rotating mechanism can rotate around a horizontal rotating shaft, which is used to control the pitch angle of the main shaft of the antenna. This structure is simple and reliable, and can carry very heavy components.

[0005] However, when this servo system is used for a radio dish antenna, it has the same problem as when it is used for a turret, i.e. slow attitude adjustment, which leads to the inability to timely face some targets that appear for a short time or move quickly. The inventor has found through research that the reasons for the slow attitude adjustment of the radio dish antenna are as follows:

[0006] 1. The pitch angle and the azimuth angle cannot be adjusted simultaneously, but need to be adjusted in sequence

[0007] The servo system of the radio dish antenna uses the same servo mechanism as the turret, which is theoretically allowed to adjust the pitch angle and the azimuth angle simultaneously, but since the radio dish antenna is not only heavier than a large caliber gun, but also more affected by the wind and has a more biased center of gravity, simultaneous adjustment of the two angles will interfere with each other, and the operation specification does not allow simultaneous adjustment.

[0008] 2. The damping directly acts on the rotating part, which leads to the inability to rotate quickly

[0009] In order to ensure that the attitude of the antenna can be maintained and not be blown by the wind, a damper needs to be arranged at the rotating part in the servo system of the radio circular surface antenna, and the damper arranged at the large-size component needs to be very strong, which causes that the rotating speed cannot be very high. SUMMARY

[0010] The application provides a large-aperture radio circular surface antenna system capable of fast rotation and a use method thereof.

[0011] The technical problem to be solved is that the servo system of the radio circular surface antenna cannot quickly adjust the attitude of the antenna.

[0012] In order to solve the above technical problem, the application adopts the following technical scheme: a large-aperture radio circular surface antenna system capable of fast rotation, comprising a circular surface antenna and a base station for bearing the circular surface antenna, the circular surface antenna is connected with the base station through a spherical hinge, a ball seat in the spherical hinge is arranged at the top center of the base station, and a ball head is fixed at the bottom of the circular surface antenna and located on the main shaft of the circular surface antenna.

[0013] The ball head extends downward along the direction of the main shaft of the circular surface antenna to form an extension column, an adjusting rope for adjusting the attitude of the circular surface antenna is arranged between the extension column and the base station, the adjusting ropes are arranged radially around the extension column, one end of each adjusting rope is fixed on the extension column and the other end is wound on an electric winch fixedly connected with the base station, and the motor of the electric winch is a stepping motor electrically connected with the automatic control system of the antenna.

[0014] Further, a counterweight ball is arranged at the lower end of the extension column, the end of each adjusting rope is fixed on the counterweight ball, the distance between the center of gravity of the circular surface antenna and the center of the ball head is A, the mass of the circular surface antenna is m, the distance between the center of the counterweight ball and the center of the ball head is B, and the mass of the counterweight ball is M, so that MB=mA.

[0015] Further, an automatic rope clamp for slowing down the circular surface antenna when the attitude of the circular surface antenna is about to be adjusted to the position is arranged on each adjusting rope, the automatic rope clamp comprises a split clamp pipe sleeved on the adjusting rope, a sleeve ring sleeved on the split clamp pipe, an electric telescopic rod for pushing the sleeve ring to slide on the split clamp pipe, and two end plates for fixing the split clamp pipe and the electric telescopic rod on the base station.

[0016] The split clamp pipe is a variable-diameter pipe combined by a plurality of splits, the seams of the splits are arranged along the length direction of the split clamp pipe, and one end of the split clamp pipe is fixed on one end plate; one end of the electric telescopic rod is fixed on the other end plate, the other end is fixed on the sleeve ring, and each electric telescopic rod is electrically connected with the automatic control system of the antenna; the end plates are fixed on the base station perpendicularly to the adjusting ropes and are penetrated by the adjusting ropes, and the end plate close to the counterweight ball is recorded as the forward rope plate.

[0017] Further, the ball seat is uniformly embedded with balls for reducing friction on the surface in contact with the ball head; the hole wall of the hole through which the adjusting rope is adjusted is uniformly embedded with balls for reducing friction.

[0018] Further, when the transmitter of the antenna system is not on the circular surface antenna and a reflector is used to transfer the electromagnetic wave of the transmitter to the circular surface antenna, the elongated column is a truss column, and the circular surface antenna, the ball head, and the counterweight ball are all provided with a hole for the electromagnetic wave to pass through along the main axis direction of the circular surface antenna.

[0019] A use method of a large-diameter radio circular surface antenna system capable of fast rotation, used for controlling the pointing of the circular surface antenna of the above-mentioned large-diameter radio circular surface antenna system capable of fast rotation, and comprising the following steps:

[0020] Step one: the line connecting the center of the ball head and the target of the circular surface antenna is called the target line, the length of the part of each adjusting rope between the adjusting rope plate and the counterweight ball is called the controlled rope length, and the controlled rope length of each adjusting rope when the main axis of the circular surface antenna is on the target line is calculated and called the target rope length;

[0021] Step two: the automatic control system of the antenna controls the electric winch corresponding to the active rope to wind up or pay out the rope, so that the controlled rope length of each adjusting rope is equal to the target rope length.

[0022] Further, the adjusting rope has at least 6 ropes; before the circular surface antenna is rotated, the controlled rope length of each adjusting rope at present is measured and called the current rope length, and each adjusting rope whose current rope length is greater than the target rope length is called the active rope, and each adjusting rope whose current rope length is less than or equal to the target rope length is called the passive rope;

[0023] Step two is as follows: the active rope is wound up by the electric winch, so that the controlled rope length of the active rope is equal to the target rope length, and the electric winch corresponding to the passive rope is in a state of no power and can be passively rotated.

[0024] Further, the adjusting rope is further provided with a resistance wire which is attached to the adjusting rope and has the same length as the adjusting rope, and each adjusting rope is further provided with a resistance meter for measuring the resistance of the resistance wire between the adjusting rope plate and the counterweight ball, the adjusting rope plate is a metal conductor, one electrode of the resistance meter is electrically connected with the adjusting rope plate, and the other electrode is electrically connected with the end of the resistance wire on the counterweight ball;

[0025] The resistance of the resistance wire is proportional to the rope length of the corresponding adjusting rope, and when the controlled rope length of the adjusting rope needs to be measured, the length of the resistance wire is obtained by proportional conversion of the resistance of the resistance wire, that is, the controlled rope length.

[0026] Further, when the circular surface antenna is aligned with a single fixed target, the adjusting rope is first clamped by the automatic rope clamp, and the adjusting rope is damped to slide in the automatic rope clamp, then the circular surface antenna is rotated, and when the controlled rope length of each adjusting rope reaches the target rope length, the corresponding automatic rope clamp is clamped to make the adjusting rope unable to slide.

[0027] Further, when tracking a non-fixed target, the circular surface antenna is first rotated to the direction of the target under the condition that the automatic rope clamp is released, then the adjusting rope is clamped by the automatic rope clamp, and the adjusting rope is damped to slide in the automatic rope clamp, and then the non-fixed target is tracked.

[0028] When the circular surface antenna is patrolling or scanning, a plurality of fixed targets are arranged along the patrolling or scanning route under the condition that the automatic rope clamp is released, and the circular surface antenna is aligned with each fixed target in sequence.

[0029] Compared with the prior art, the large-diameter radio circular surface antenna system capable of rapid rotation and the use method thereof have the following beneficial effects:

[0030] In the application, the adjustment of the azimuth angle and the elevation angle is simultaneously performed in one adjustment process by using the spherical hinge, and the adjustment is not required to be performed in sequence; the length of the adjusting rope determines the orientation of the antenna main shaft, the spherical hinge does not need to be provided with damping, and the damping provided on the adjusting rope can effectively maintain the posture of the antenna; the damping provided on the light and small component, i.e., the adjusting rope, does not need to have high strength, and the adjusting rope can still be quickly retracted and extended. In summary, the circular surface antenna can be quickly aligned with the target because only one adjustment is required and the adjustment is faster.

[0031] In the application, the counterweight ball, the spherical hinge and the circular surface antenna form a balanced lever structure, and the force required for retracting and extending the adjusting rope and the damping strength are further reduced, and the damping can even be temporarily cancelled during the adjustment of the posture of the circular surface antenna.

[0032] In the application, the adjusted data is the rope length which is easy to measure, rather than the angle which is not easy to measure, so that the adjustment process is easier and more accurate. BRIEF DESCRIPTION OF DRAWINGS

[0033] Fig. 1 FIG. 1 is a structural schematic diagram of a large-diameter radio circular surface antenna system capable of rapid rotation in the application;

[0034] Fig. 2 FIG. 3 is a distribution schematic diagram of the adjusting rope, and the view angle is a bottom view;

[0035] Fig. 3 FIG. 5 is a structural schematic diagram of the automatic rope clamp;

[0036] In the diagram, 1-circular antenna, 11-ball head, 2-base, 21-ball seat, 3-adjustment cable, 4-counterweight ball, 5-reflector, 61-split clamp tube, 62-electric telescopic rod, 63-end plate, 64-ring. Detailed Implementation

[0037] like Figs. 1-3 As shown, a large-aperture radio circular antenna system that can rotate rapidly includes a circular antenna 1 and a base 2 for supporting the circular antenna 1. The circular antenna 1 is connected to the base 2 via a ball joint. The ball seat 21 in the ball joint is located at the center of the top of the base 2, and the ball head 11 is fixed to the bottom of the circular antenna 1 and located on the main axis of the circular antenna 1.

[0038] One advantage of this ball joint is that it allows for simultaneous adjustment of azimuth and pitch angles without prior arrangement, resulting in faster adjustments. Another advantage is that the force required for adjustment is completely separate from the force required to maintain the attitude. Note that the ball joint 11 should be hollow to reduce weight.

[0039] The ball head 11 extends downward along the main axis of the circular antenna 1 to form an extension column. An adjustment cable 3 for adjusting the attitude of the circular antenna 1 is provided between the extension column and the base 2. The adjustment cable 3 is arranged radially with the extension column as the center. One end of each adjustment cable 3 is fixed on the extension column and the other end is wound around an electric winch fixedly connected to the base 2. The motor of the electric winch is a stepper motor electrically connected to the antenna's automatic control system.

[0040] Here, length adjustment is used instead of angle adjustment because length measurement and adjustment are easier and more precise than angle measurement and adjustment.

[0041] A counterweight ball 4 is provided at the lower end of the extension column. The ends of each adjustment cable 3 are fixed on the counterweight ball 4. The distance between the center of gravity of the circular antenna 1 and the center of the ball head 11 is A. The mass of the circular antenna 1 is m. The distance between the center of the counterweight ball 4 and the center of the ball head 11 is B. The mass of the counterweight ball 4 is M. Then MB = mA.

[0042] Here, the counterweight sphere 4 and the circular antenna 1 form a balancing lever with the center of the sphere head 11 as the axis. Adjusting the attitude of the circular antenna 1 will only require a small amount of force. When the entire system is not affected by external interference, the entire circular antenna 1 can even be kept in a fixed attitude without any fixing.

[0043] An automatic cable clamp is arranged on each adjusting cable 3 for decelerating the circular surface antenna 1 when its attitude is about to be adjusted to the right position, which comprises a split clamp pipe 61 sleeved on the adjusting cable 3, a sleeve ring 64 sleeved on the split clamp pipe 61, an electric telescopic rod 62 for pushing the sleeve ring 64 to slide on the split clamp pipe 61, and two end plates 63 for fixing the split clamp pipe 61 and the electric telescopic rod 62 on the base 2;

[0044] The split clamp pipe 61 is a variable diameter pipe made of a plurality of split pieces, the seams of the split pieces are arranged along the length direction of the split clamp pipe 61, and one end of the split clamp pipe 61 is fixed on one end plate 63; one end of the electric telescopic rod 62 is fixed on the other end plate 63, and the other end is fixed on the sleeve ring 64, and each electric telescopic rod 62 is electrically connected with the automatic control system of the antenna; the end plate 63 is fixed on the base 2 perpendicularly to the adjusting cable 3 and is penetrated by the adjusting cable 3, and the end plate 63 close to the counterweight ball 4 is recorded as the cable following plate.

[0045] The automatic cable clamp here is used to lock the attitude of the circular surface antenna 1, and since the circular surface antenna 1 in this embodiment will not fall down without damping, it is not necessary to set damping during the adjustment, so that the adjustment can be fast, and only needs to be set damping or locked when the adjustment is about to be completed (for example, the controlled cable length is one meter different from the target cable length) or has been completed.

[0046] The ball seat 21 is uniformly inlaid with ball bearings on the surface in contact with the ball head 11 for reducing friction, so that the rotation of the circular surface antenna 1 is more labor-saving; the hole wall of the hole penetrated by the cable following plate is uniformly inlaid with ball bearings for reducing friction, so that the cable following plate is prevented from being stuck with the adjusting cable 3.

[0047] When the transmitter of the antenna system is not on the circular surface antenna 1, and the electromagnetic wave of the transmitter is transferred to the circular surface antenna 1 by the reflector 5, the extension column is a truss column, and the circular surface antenna 1, the ball head 11, and the counterweight ball 4 are all provided with a hole for the electromagnetic wave to pass through along the main axis direction of the circular surface antenna 1. This is a common practice, because some transmitters are not suitable to be placed on the circular surface antenna 1, but need to be set elsewhere and transfer the electromagnetic wave by the reflector 5, and here the corresponding hole is needed to be opened to avoid blocking the electromagnetic wave.

[0048] A use method of a large-aperture radio circular surface antenna system capable of fast rotation, which is used for controlling the pointing of the circular surface antenna 1 in the above-mentioned large-aperture radio circular surface antenna system capable of fast rotation, and comprises the following steps:

[0049] Step one: the line connecting the spherical center of the ball head 11 and the target of the circular surface antenna 1 is called the target line, the length of the part of each adjusting rope 3 between the in-order rope plate and the counterweight ball 4 is called the controlled rope length, the controlled rope length of each adjusting rope 3 when the main shaft of the circular surface antenna 1 is on the target line is calculated and called the target rope length;

[0050] The scheme for calculating the target rope length is freely selected according to geometric knowledge, and a relatively simple scheme is provided here:

[0051] The spherical center of the ball head 11 is called point X, the spherical center of the counterweight ball 4 is called point Y, and the intersection of the adjusting rope 3 and the in-order rope plate is called point Z, which forms a triangle with XYZ, the lengths of XZ and XY are fixed values that can be measured in advance before the antenna is used, and the angle of ∠ZXY can be calculated from the azimuth and elevation angles of the main shaft of the circular surface antenna 1. With the lengths of the two sides and the angle between the two sides, the length of the third side of the triangle, i.e. the target rope length, can be calculated.

[0052] Step two: the electric winch corresponding to the active rope is controlled by the automatic control system of the antenna to wind or unwind the rope, so that the controlled rope length of each adjusting rope 3 is equal to the target rope length.

[0053] Before the circular surface antenna 1 rotates, the current controlled rope length of each adjusting rope 3 is measured and called the current rope length, and the adjusting ropes 3 whose current rope length is greater than the target rope length are called active ropes, and the adjusting ropes 3 whose current rope length is less than or equal to the target rope length are called passive ropes.

[0054] There are at least six adjusting ropes 3, which can ensure that the lengths of at least three adjusting ropes 3 can be controlled. Because the adjusting ropes 3 are soft, it is difficult to accurately control the length of the rope when unwinding, but it is possible to control the length of the rope when winding. If six adjusting ropes 3 are set, there are either three active ropes or two active ropes plus one passive rope whose length is equal to the target rope length at the beginning.

[0055] Step two is as follows: the active rope is wound by the electric winch, so that the controlled rope length of the active rope is equal to the target rope length, and the electric winch corresponding to the passive rope is in a passive state and can be passively rotated.

[0056] The adjusting rope 3 is also provided with a resistance wire that adheres to the adjusting rope 3 and is equal in length to the adjusting rope 3, and each adjusting rope 3 is also provided with a resistance meter for measuring the resistance of the resistance wire between the in-order rope plate and the counterweight ball 4. The in-order rope plate is a metal conductor, one electrode of the resistance meter is electrically connected to the in-order rope plate, and the other electrode is electrically connected to the end of the resistance wire on the counterweight ball 4.

[0057] The resistance of the resistance wire is proportional to the length of the corresponding adjusting rope 3, and when the controlled rope length of the adjusting rope 3 needs to be measured, the length of the resistance wire is calculated by proportional conversion of the resistance of the resistance wire, which is the controlled rope length. This measurement method can immediately measure the controlled rope length.

[0058] In the case of aligning the circular antenna 1 with a single fixed target, the adjusting rope 3 is first clamped by the automatic rope clamp, and the adjusting rope 3 is damped to slide in the automatic rope clamp, then the circular antenna 1 is rotated, and when the controlled rope length of each adjusting rope 3 reaches the target rope length, the corresponding automatic rope clamp is clamped to make the adjusting rope 3 unable to slide.

[0059] In the case of tracking a non-fixed target, the circular antenna 1 is first rotated to the direction of the target under the condition that the automatic rope clamp is loosened, then the adjusting rope 3 is clamped by the automatic rope clamp, and the adjusting rope 3 is damped to slide in the automatic rope clamp, and then the non-fixed target is tracked.

[0060] Here, the tracking target refers to a mature technology on a radar, and the hardware for tracking generally comprises a distance tracking branch, an azimuth angle tracking branch and an elevation angle tracking branch, and the deviation between the real position of the target and the current direction of the circular antenna 1 is obtained by using the characteristics of radio waves, and then the antenna is rotated to the real position of the target.

[0061] In the case of patrolling or scanning the circular antenna 1, a plurality of fixed targets are arranged along the patrolling or scanning route under the condition that the automatic rope clamp is loosened, and the circular antenna 1 is aligned with each fixed target in sequence.

[0062] The clamping degree of the automatic rope clamp corresponds to the length of the electric telescopic rod 62, and the calibration should be performed before use to determine how long the electric telescopic rod 62 can completely lock the adjusting rope 3, how long the electric telescopic rod 62 can make the adjusting rope 3 damped to slide, and how long the electric telescopic rod 62 can make the adjusting rope 3 slide without damping.

[0063] The above-described embodiments are only used to describe the preferred embodiments of the present application, and are not used to limit the scope of the present application, and various modifications and improvements to the technical solutions of the present application made by those skilled in the art without departing from the design spirit of the present application should fall within the protection scope of the present application.

Claims

1. A large aperture radio dish antenna system capable of fast rotation, comprising a dish antenna (1) and a pedestal (2) for carrying the dish antenna (1), characterized in that: The spherical surface antenna (1) is connected with the base (2) through a spherical hinge, a ball seat (21) in the spherical hinge is arranged at the top center of the base (2), and a ball head (11) is fixed at the bottom of the spherical surface antenna (1) and located on the main shaft of the spherical surface antenna (1); The ball head (11) extends downward along the direction of the main shaft of the spherical surface antenna (1) to form an extension column, an adjusting rope (3) for adjusting the posture of the spherical surface antenna (1) is arranged between the extension column and the base (2), the adjusting rope (3) is arranged radially around the extension column, one end of each adjusting rope (3) is fixed on the extension column, and the other end is wound on an electric winch fixedly connected with the base (2), and the motor of the electric winch is a stepping motor electrically connected with the automatic control system of the antenna; A counterweight ball (4) is arranged at the lower end of the extension column, and the end of each adjusting rope (3) is fixed on the counterweight ball (4), the distance between the center of gravity of the spherical surface antenna (1) and the ball center of the ball head (11) is A, the mass of the spherical surface antenna (1) is m, the distance between the ball center of the counterweight ball (4) and the ball center of the ball head (11) is B, and the mass of the counterweight ball (4) is M, then MB=mA.

2. The large aperture radio circular antenna system capable of fast rotation according to claim 1, characterized in that: An automatic rope clamp for slowing down the spherical surface antenna (1) when the posture of the spherical surface antenna (1) is about to be adjusted to the position is further arranged on each adjusting rope (3), the automatic rope clamp comprises a split clamp pipe (61) sleeved on the adjusting rope (3), a sleeve ring (64) sleeved on the split clamp pipe (61), an electric telescopic rod (62) for pushing the sleeve ring (64) to slide on the split clamp pipe (61), and two end plates (63) for fixing the split clamp pipe (61) and the electric telescopic rod (62) on the base (2); The split clamp pipe (61) is a variable-diameter pipe split by a plurality of splits, the split seams of the splits are arranged along the length direction of the split clamp pipe (61), and one end of the split clamp pipe (61) is fixed on one end plate (63); one end of the electric telescopic rod (62) is fixed on the other end plate (63), the other end is fixed on the sleeve ring (64), and each electric telescopic rod (62) is electrically connected with the automatic control system of the antenna; the end plate (63) is fixed on the base (2) perpendicularly to the adjusting rope (3) and is penetrated by the adjusting rope (3), and the end plate (63) close to the counterweight ball (4) is recorded as a forward rope plate.

3. The large aperture radio circular antenna system capable of fast rotation according to claim 2, characterized in that: The ball seat (21) is uniformly embedded with balls for reducing friction on the surface in contact with the ball head (11); and the hole wall of the hole penetrated by the forward rope plate is uniformly embedded with balls for reducing friction.

4. The large aperture radio circular antenna system capable of fast rotation according to claim 1, characterized in that: When the transmitter of the antenna system is not on the spherical surface antenna (1), and a reflector (5) is used to transfer the electromagnetic wave of the transmitter to the spherical surface antenna (1), the extension column is a truss column, and the spherical surface antenna (1), the ball head (11) and the counterweight ball (4) are all provided with a hole for the electromagnetic wave to pass through along the main shaft direction of the spherical surface antenna (1).

5. A method for using a large aperture radio circular surface antenna system capable of fast rotation, characterized in that: A method for controlling the pointing of a spherical surface antenna (1) in a large-diameter radio spherical surface antenna system capable of rapid rotation, comprising the following steps: Step one: the line of the ball center of the ball head (11) and the target of the circular surface antenna (1) is called the target line, the length of the part of each adjusting rope (3) between the in-order rope plate and the counterweight ball (4) is called the controlled rope length, the controlled rope length of each adjusting rope (3) when the main shaft of the circular surface antenna (1) is on the target line is calculated and called the target rope length; Step two: the electric winch corresponding to the active rope is controlled by the automatic control system of the antenna to wind or unwind the rope, so that the controlled rope length of each adjusting rope (3) is equal to the target rope length.

6. The use of a large aperture radio circular antenna system capable of rapid rotation according to claim 5, characterized in that: The adjusting rope (3) has at least six ropes; before the circular surface antenna (1) rotates, the controlled rope length of each adjusting rope (3) is measured and called the current rope length, and each adjusting rope (3) whose current rope length is greater than the target rope length is called the active rope, and each adjusting rope (3) whose current rope length is less than or equal to the target rope length is called the passive rope; Step two is as follows: the active rope is wound by the electric winch, so that the controlled rope length of the active rope is equal to the target rope length, and the electric winch corresponding to the passive rope is in a state of no power and can be passively rotated.

7. The use of a large aperture radio circular antenna system capable of rapid rotation according to claim 5, characterized in that: The adjusting rope (3) is also provided with a resistance wire that is attached to the adjusting rope (3) and has the same length as the adjusting rope (3), each adjusting rope (3) is also provided with a resistance meter for measuring the resistance of the resistance wire between the in-order rope plate and the counterweight ball (4), the in-order rope plate is a metal conductor, one electrode of the resistance meter is electrically connected to the in-order rope plate, and the other electrode is electrically connected to the end of the resistance wire on the counterweight ball (4); The resistance of the resistance wire is proportional to the rope length of the corresponding adjusting rope (3), and when the controlled rope length of the adjusting rope (3) needs to be measured, the length of the resistance wire is obtained by proportional conversion of the resistance of the resistance wire, which is the controlled rope length.

8. The use of a large aperture radio circular antenna system capable of rapid rotation according to claim 6, characterized in that: When the circular surface antenna (1) is aligned with a single fixed target, the adjusting rope (3) is first clamped by the automatic rope clamp, so that the adjusting rope (3) slides in the automatic rope clamp with damping, and then the circular surface antenna (1) is rotated, and when the controlled rope length of each adjusting rope (3) reaches the target rope length, the corresponding automatic rope clamp is clamped tightly, so that the adjusting rope (3) cannot slide.

9. The use of a large aperture radio circular antenna system capable of rapid rotation according to claim 6, characterized in that: When tracking a non-fixed target, the circular surface antenna (1) is first rotated to the direction of the target under the condition that the automatic rope clamp is loose, and then the adjusting rope (3) is clamped by the automatic rope clamp, so that the adjusting rope (3) slides in the automatic rope clamp with damping, and then the non-fixed target is tracked; When the circular surface antenna (1) is patrolling or scanning, multiple fixed targets are arranged along the patrolling or scanning route under the condition that the automatic rope clamp is loose, so that the circular surface antenna (1) is aligned with each fixed target in sequence.

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