Radar antenna multidirectional adjusting base and control method thereof

Abstract

The invention belongs to the technical field of radar antennas, and particularly relates to a radar antenna multidirectional adjusting base and a control method thereof.The radar antenna multidirectional adjusting base comprises a pitching fixing base, a rotating disc and an auxiliary braking assembly, the rotating disc is arranged on the pitching fixing base, and the rotating disc is driven by a motor to have the freedom degree of rotating around the axis of the rotating disc on the pitching fixing base; the auxiliary braking assembly comprises an electromagnet arranged on the second support, a plug pin and limiting rods arranged on the first support, the attraction end of the plug pin and the electromagnet are in magnetic attraction fit, and the insertion end of the plug pin is inserted between the limiting rods and matched with the limiting rods to limit the rotating disc on the pitching fixing base. A reset spring is arranged between the plug pin and the second support, the reset spring provides acting force opposite to the attraction force of the electromagnet for the plug pin, and the adjusting base can stably limit the radar antenna in a long-time non-working state for a long time. And violent collision between the turntable and the pitching fixing seat when the radar antenna is not controlled to tilt can be prevented.

Description

Technical Field

[0001] The present invention belongs to the technical field of radar antennas, and in particular relates to a radar antenna multi-directional adjustment base and a control method thereof. Background Art

[0002] In order to achieve accurate detection of targets at different directions and altitudes, the radar antenna on the base must have the function of flexible angle adjustment, including adjustment of azimuth angle and pitch angle.

[0003] When radar antennas are not in use for extended periods, they are typically tilted upward to reduce external interference and protect the equipment. Currently, electromagnetic brakes are commonly used to stabilize the antennas during periods of inactivity. However, existing electromagnetic brake solutions frequently encounter problems when the radar antenna is stationary and pointing upward for extended periods. Mechanically, an upward-pointing antenna is not only subject to the constant forces of gravity in the pitch direction, but also to significant external torque in severe weather conditions such as strong winds and heavy rain. Prolonged power applied to the electromagnetic brake causes the electromagnetic coil to heat up, accelerating the aging of internal components and reducing braking performance. These conditions can reduce the braking effectiveness of the electromagnetic brake, causing the radar antenna to wobble in the pitch direction or even droop, causing the turntable in the adjustment base to violently collide with the pitch mount.

[0004] On the other hand, the current mainstream adjustment method uses a servo system to drive the rotation of the turntable on the pitch mount to change the pitch angle of the radar antenna. However, if the servo system fails during use, the radar antenna's turntable will rotate uncontrollably under the action of gravity, causing the radar antenna to droop. Due to the lack of an effective restraint and adjustment mechanism, the turntable's rotation speed often increases rapidly, eventually causing a violent rigid collision between the turntable and the pitch mount. This collision can damage the turntable, the pitch mount, and even other key components of the radar antenna, significantly increasing the cost and difficulty of repair.

[0005] Therefore, how to ensure that the pitch swing base of the radar antenna maintains high stability in a long-term non-working state, greatly improve its ability to withstand extreme external impacts, and reduce the damage to the equipment caused by the radar antenna drooping in the event of a fault is an urgent problem that technicians in this field need to solve. Summary of the Invention

[0006] In order to solve the problems existing in the above-mentioned prior art, the present invention provides a multi-directional adjustment base for a radar antenna and a control method thereof, which can provide long-term and stable positioning limit for a radar antenna that has been in a non-working state for a long time, and can also prevent a violent collision between the turntable and the pitch fixing seat when the radar antenna is uncontrollably tilted, thereby reducing equipment damage.

[0007] The specific technical solution adopted in the present invention is:

[0008] A multi-directional adjustment base for a radar antenna includes a pitch fixing seat and a turntable. The turntable is arranged on the pitch fixing seat. The turntable has the freedom to rotate around its own axis on the pitch fixing seat with the help of a motor. The key is that it also includes an auxiliary brake assembly. The auxiliary brake assembly includes a limit rod, an electromagnet and a latch. The limit rod is arranged on a first bracket, and the electromagnet and the latch are arranged on a second bracket. The adsorption end of the latch forms a magnetic fit with the electromagnet, and the insertion end of the latch is inserted between the limit rods and cooperates with the limit rods to form a limit of the turntable on the pitch fixing seat. The controlled ends of the electromagnet and the motor are respectively connected to the control end of the controller. A reset spring is arranged between the latch and the second bracket. The reset spring provides a force to the latch that is opposite to the suction force of the electromagnet.

[0009] The first bracket is fixedly connected to the pitch fixing seat, and the second bracket is fixedly connected to the turntable.

[0010] The second bracket is provided with a guide hole for the latch.

[0011] The second bracket is provided with an electromagnetic shielding cover, and the electromagnet is arranged in the electromagnetic shielding cover.

[0012] The power output end of the motor is connected to the driving wheel and the driving wheel is connected to a group of driven wheels, and the driving wheel and the driven wheels are respectively engaged with the turntable.

[0013] The turntable is provided with a buffer block, and the pitch fixing seat is provided with a limit block matched with the buffer block. The buffer block contacts the limit block to form a buffer limit when the turntable is tilted.

[0014] The limiting rods and latches are respectively arranged in a circumferential array along the turntable, the limiting rods are arranged parallel to the axis of the turntable, and the electromagnets and latches are arranged parallel to the radial line of the turntable.

[0015] The first bracket or the second bracket is provided with a displacement sensor matched with the latch, and the displacement sensor is connected to the signal receiving end of the controller.

[0016] The electromagnet and the motor are powered by the same power supply.

[0017] A control method for a radar antenna multi-directional adjustment base comprises the following steps:

[0018] S1. When the radar antenna is in a stationary state facing the sky, the electromagnet is in a demagnetized state. Under the action of the return spring, the latch is inserted between the limit rods and cooperates with the limit rods to prevent the turntable from rotating.

[0019] S2. Before the radar antenna works, the controller turns on the circuit of the electromagnet, and the electromagnet magnetizes and attracts the latch, causing the latch to move toward the electromagnet.

[0020] S3. After the displacement sensor detects that the latch pin is separated from the limit rod, it transmits a signal to the controller. The controller connects the circuit of the motor, and the motor drives the driving wheel to rotate forward. The driving wheel drives the turntable to rotate, thereby adjusting the pitch angle of the radar antenna.

[0021] S4. After the radar antenna is finished working, the motor drives the driving wheel to reverse, and the turntable carrying the radar antenna is set up toward the sky;

[0022] S5. The controller cuts off the circuit of the electromagnet, the electromagnet is demagnetized, and the latch is reinserted between the limit rods under the action of the reset spring.

[0023] The beneficial effects of the present invention are:

[0024] The present invention adopts an auxiliary brake assembly added between the turntable and the pitch fixed seat. When the radar antenna is set up towards the sky, the electromagnet in the auxiliary brake assembly is powered off and demagnetized, and the reset spring pushes the latch back between the limit rods to ensure that the latch is accurately reset and maintains a stable limit state.

[0025] Multiple latches and limit rods work together to evenly bear the torque of the turntable and limit the turntable in multiple directions, effectively preventing the turntable from accidentally rotating due to external forces or its own inertia. This greatly improves the stability of the limit between the turntable and the pitch fixed base when the radar antenna is not working for a long time.

[0026] If the servo system fails while the radar antenna is operating, the electromagnet demagnetizes and the reset spring rapidly pushes the latch along the radial direction of the turntable. At the beginning of the radar antenna's drooping process, the latch and the limit rod contact and collide with each other, cushioning the turntable when its kinetic energy is low, thus preventing the turntable from contacting the pitch fixed seat and causing a huge impact at the end of the drooping process. The latch and limit rod intervene and cushion the turntable in a self-destructive manner, consuming the turntable's kinetic energy and reducing the impact force of the turntable, thus avoiding direct collision between the turntable and the pitch fixed seat and causing damage to the equipment, thereby reducing maintenance costs.

[0027] The position status of the latch is monitored by a displacement sensor. Only when the displacement sensor detects that the latch is separated from the limit rod will the controller connect the motor circuit to rotate the turntable. This avoids misoperation and damage to the auxiliary brake assembly caused by the latch not being completely separated from the limit rod, and ensures the stability of the limit and radar pitch angle adjustment process. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the adjustment base of the present invention;

[0029] Figure 2A top view of the adjustable base of the present invention;

[0030] Figure 3 for Figure 2 AA section view;

[0031] Figure 4 This is a schematic diagram of the application of the present invention on a base;

[0032] Figure 5 for Figure 4 Enlarged view of the middle part B;

[0033] Figure 6 This is a schematic diagram of the assembly of the driving wheel, driven wheel and turntable;

[0034] Figure 7 A block diagram of a control method for adjusting a base according to the present invention;

[0035] In the accompanying drawings, 1. pitch fixing seat, 2. turntable, 3. motor, 4. limit rod, 5. electromagnet, 6. pin, 601. adsorption end, 602. insertion end, 7. first bracket, 8. second bracket, 9. return spring, 10. electromagnetic shielding cover, 11. driving wheel, 12. driven wheel, 13. buffer block, 14. limit block, 15. displacement sensor. DETAILED DESCRIPTION

[0036] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0037] Specific implementation examples Figure 1 、 Figure 4 As shown, the present invention relates to a multi-directional adjustment base for a radar antenna, comprising a pitch fixing base 1 and a turntable 2, wherein the turntable 2 is arranged on the pitch fixing base 1, and the turntable 2 has the freedom to rotate around its own axis on the pitch fixing base 1 by means of a motor 3. The turntable 2 also includes an auxiliary brake assembly for the turntable 2 and the pitch fixing base 1, wherein the auxiliary brake assembly includes a limit rod 4, an electromagnet 5 and a latch 6, wherein the limit rod 4 and the latch 6 are respectively arranged in a circumferential array along the turntable 2, and the limit rod 4 is fixed by means of a first bracket 7 and is parallel to the axis of the turntable 2. The electromagnet 5 and latch 6 are mounted on the second bracket 8 and arranged parallel to the radial direction of the turntable 2. The suction end 601 of the latch 6 forms a magnetic connection with the electromagnet 5. The insertion end 602 of the latch 6 is inserted between the limit rods 4 and cooperates with them to limit the position of the turntable 2 on the pitch mount 1. The controlled ends of the electromagnet 5 and the motor 3 are respectively connected to the control end of the controller. A return spring 9 is provided between the latch 6 and the second bracket 8 to apply a force to the latch 6 in the opposite direction to the suction force of the electromagnet 5. When the radar antenna is positioned upward, the auxiliary brake assembly is positioned between the bottom of the turntable 2 and the pitch mount 1. The latch 6 is arranged symmetrically along the axial direction of the turntable 2.

[0038] like Figure 1-Figure 3 As shown, the limiting rods 4 are arranged in a circular array along the turntable 2, with insertion holes for the latch 6 formed between adjacent limiting rods 4. When the radar antenna is positioned upward and the electromagnet 5 is deenergized and demagnetized, the reset spring 9 can quickly and forcefully push the latch 6 back between the limiting rods 4, ensuring that the latch 6 is accurately reset and maintaining a stable limiting state. The insertion end 602 of the latch 6 is inserted into the insertion hole formed between the adjacent limiting rods 4. Multiple latches 6 contact the limiting rods 4, allowing the turntable 2 to be limited in multiple directions. The circumferential array of limiting rods 4 and latches 6 cooperate to evenly withstand the torque of the turntable 2, effectively preventing the turntable 2 from accidentally rotating due to external forces or its own inertia. This greatly improves the stability of the limit between the turntable 2 and the pitch fixing base 1 when the radar antenna is not in operation for a long time.

[0039] On the other hand, when the radar antenna is working, if the servo system suddenly fails, the motor 3 fails and the electromagnet 5 is demagnetized, the reset spring 9 will quickly push the pin 6 along the radial direction of the turntable 2. At the beginning of the radar antenna's drooping process, the pin 6 and the limit rod 4 will contact and collide with each other, and the turntable 2 will be buffered when the kinetic energy of the turntable 2 is small, thereby avoiding the turntable 2 from contacting the pitch fixed seat 1 at the end of the drooping process and causing a huge impact; at the beginning of the radar antenna's drooping process, the pin 6 and the limit rod 4 will contact and collide with each other, which may cause the pin 6 and the limit rod 4 to deform or break, and convert the kinetic energy of the turntable 2. The pin 6 and the limit rod 4 intervene and buffer the turntable 2 in the form of self-destruction, consume the kinetic energy of the turntable 2, reduce the possible impact force of the turntable 2, avoid the damage to equipment and components caused by the direct collision of the turntable 2 with the pitch fixed seat 1, and reduce maintenance costs.

[0040] In this embodiment, the first bracket 7 is fixedly connected to the pitch fixing base 1, and the second bracket 8 is fixedly connected to the turntable 2. The return spring 9 is sleeved on the latch 6, and the lower end of the return spring 9 is fixedly connected to the latch 6, and the upper end of the return spring 9 is fixedly connected to the second bracket 8.

[0041] Preferably, a guide hole for the latch 6 is provided on the second bracket 8, and the guide hole can guide the latch 6 to maintain linear motion during the movement, ensuring that the insertion end 602 of the latch 6 can be accurately inserted between the limit rods 4, avoiding the latch 6 from being offset during the movement and failing to limit normally, thereby further improving the accuracy and stability of the limit.

[0042] An electromagnetic shielding cover 10 is provided on the second bracket 8, and the electromagnet 5 is arranged in the electromagnetic shielding cover 10. The electromagnetic shielding cover 10 can effectively prevent the magnetic field of the electromagnet 5 from interfering with the surrounding environment and other components, ensure the stability of the magnetic field of the electromagnet 5, and make the magnetic attraction of the electromagnet 5 on the pin 6 stable and reliable, thereby ensuring the accurate movement of the pin 6, which is conducive to maintaining the stability of the limit.

[0043] The power output end of the motor 3 is connected to the driving wheel 11 and the driven wheel 12 by means of a chain transmission. Figure 6 As shown, the driving wheel 11 and the driven wheel 12 are respectively engaged with the turntable 2. Two turntables 2 are symmetrically arranged on the pitch fixed base 1. The power output end of the motor 3 is connected to the double-output shaft reducer, which transmits power to the two driving wheels 11, thereby driving the two turntables 2 to rotate synchronously; the driving wheel 11 and the driven wheel 12 are respectively engaged with the turntable 2. This transmission method can evenly transmit the power of the motor 3 to the turntable 2, so that the turntable 2 is evenly stressed during rotation, avoiding shaking or deviation of the turntable 2 due to local uneven stress, and facilitating stable position limiting after adjusting the pitch angle.

[0044] like Figure 5 As shown, a buffer block 13 is provided on the turntable 2. The turntable 2 is fixedly connected to the mounting bracket of the radar antenna. The buffer ring 13 is mounted on the mounting bracket. A stop block 14 is provided on the pitch mount 1 to match the buffer block 13. The contact between the buffer block 13 and the stop block 14 forms a buffer limit when the turntable 2 is tilted. When the turntable 2 tilts to the lowest position, the buffer block 13 and the stop block 14 contact to generate deformation and absorb kinetic energy, further preventing damage to the turntable 2 or the pitch mount 1 from direct rigid collision. The buffer block 13 is made of polyurethane or rubber.

[0045] A displacement sensor 15 matching the latch 6 is provided on the first bracket 7 or the second bracket 8. The displacement sensor 15 is connected to the signal receiving end of the controller. Preferably, the displacement sensor 15 is provided on the second bracket 8. Figure 7 As shown, the position state of the latch 6 is monitored by the displacement sensor 15. Only when the displacement sensor 15 detects that the latch 6 is separated from the limit rod 4, the controller will connect the circuit of the motor 3 to rotate the turntable 2, ensuring that the motor 3 will not operate to drive the turntable 2 to rotate until the latch 6 is completely separated from the limit rod 4, avoiding misoperation and damage to the auxiliary brake assembly caused by the latch 6 not being completely separated from the limit rod 4, and ensuring the stability of the limit and radar pitch angle adjustment process.

[0046] Electromagnet 5 and motor 3 are powered by the same power supply, ensuring synchronization and stability between the two. When angle adjustment or position limiting operations are required, the power supply can provide stable power to both electromagnet 5 and motor 3, ensuring they work together according to the predetermined program and logic, thus maintaining the stability and reliability of the entire system.

[0047] A control method for a radar antenna multi-directional adjustment base of the present invention comprises the following steps:

[0048] S1. When the radar antenna is in a stationary state facing upward, the electromagnet 5 is in a demagnetized state, and the latch 6 is inserted between the limit rods 4 under the action of the return spring 9 to cooperate with the limit rods 4 to prevent the turntable 2 from rotating;

[0049] S2. Before the radar antenna works, the controller turns on the circuit of the electromagnet 5, and the electromagnet 5 magnetizes and attracts the latch 6, causing the latch 6 to move toward the electromagnet 5.

[0050] S3, after the displacement sensor 15 detects that the latch 6 is separated from the limit rod 4, it transmits a signal to the controller, which connects the circuit of the motor 3, and the motor 3 drives the driving wheel 11 to rotate forward, and the driving wheel 11 drives the turntable 2 to rotate, thereby adjusting the pitch angle of the radar antenna;

[0051] S4. After the radar antenna is finished working, the motor 3 drives the driving wheel 11 to reverse, and the turntable 2 carrying the radar antenna is set up toward the sky;

[0052] S5, the controller cuts off the circuit of the electromagnet 5, the electromagnet 5 is demagnetized, and the latch 6 is reinserted between the limit rods 4 under the action of the reset spring 9.

Claims

1. A radar antenna multi-directional adjustment base, comprising a pitch fixing base (1) and a turntable (2), wherein the turntable (2) is arranged on the pitch fixing base (1), and the turntable (2) has the freedom to rotate around its own axis on the pitch fixing base (1) by means of a motor (3), characterized in that: The invention also includes an auxiliary brake component, which includes a limit rod (4), an electromagnet (5) and a latch (6). The limit rod (4) is arranged on the first bracket (7), and the electromagnet (5) and the latch (6) are arranged on the second bracket (8). The adsorption end (601) of the latch (6) forms a magnetic attraction with the electromagnet (5). The insertion end (602) of the latch (6) is inserted between the limit rod (4) and cooperates with the limit rod (4) to form a limit of the turntable (2) on the pitch fixed seat (1). The controlled ends of the electromagnet (5) and the motor (3) are respectively connected to the control end of the controller. A reset spring (9) is arranged between the latch (6) and the second bracket (8). The reset spring (9) provides a force to the latch (6) in the opposite direction to the suction force of the electromagnet (5).

2. The radar antenna multi-directional adjustment base according to claim 1, characterized in that: The first bracket (7) is fixedly connected to the pitch fixing seat (1), and the second bracket (8) is fixedly connected to the turntable (2).

3. The radar antenna multi-directional adjustment base according to claim 2, characterized in that: The second bracket (8) is provided with a guide hole for the latch (6).

4. The radar antenna multi-directional adjustment base according to claim 1, characterized in that: An electromagnetic shielding cover (10) is provided on the second bracket (8), and the electromagnet (5) is provided in the electromagnetic shielding cover (10).

5. The radar antenna multi-directional adjustment base according to claim 1, characterized in that: The power output end of the motor (3) is connected to a driving wheel (11) in a transmission connection, the driving wheel (11) is connected to a group of driven wheels (12) in a transmission connection, and the driving wheel (11) and the driven wheels (12) are respectively engaged with the turntable (2).

6. The radar antenna multi-directional adjustment base according to claim 1, characterized in that: The turntable (2) is provided with a buffer block (13), and the pitch fixing seat (1) is provided with a limit block (14) matched with the buffer block (13). The buffer block (13) contacts the limit block (14) to form a buffer limit when the turntable (2) is tilted.

7. The radar antenna multi-directional adjustment base according to claim 1, characterized in that: The limiting rod (4) and the latch (6) are respectively arranged in a circumferential array along the turntable (2); the limiting rod (4) is arranged parallel to the axis of the turntable (2); and the electromagnet (5) and the latch (6) are arranged parallel to the radial line of the turntable (2).

8. The radar antenna multi-directional adjustment base according to claim 1, characterized in that: A displacement sensor (15) matched with the latch (6) is provided on the first bracket (7) or the second bracket (8), and the displacement sensor (15) is connected to a signal receiving end of the controller.

9. The radar antenna multi-directional adjustment base according to claim 8, characterized in that: The electromagnet (5) and the motor (3) are powered by the same power supply.

10. The control method of the radar antenna multi-directional adjustment base according to claim 9, characterized in that: The following steps are involved: S1. When the radar antenna is in a stationary state facing the sky, the electromagnet (5) is in a demagnetized state, and the latch (6) is inserted between the limit rods (4) under the action of the return spring (9) and cooperates with the limit rods (4) to prevent the turntable (2) from rotating; S2. Before the radar antenna works, the controller turns on the circuit of the electromagnet (5), and the electromagnet (5) magnetizes and attracts the latch (6), causing the latch (6) to move toward the electromagnet (5); S3, after the displacement sensor (15) detects that the latch (6) is separated from the limit rod (4), the signal is transmitted to the controller, and the controller connects the circuit of the motor (3), the motor (3) works to drive the driving wheel (11) to rotate forward, and the driving wheel (11) drives the turntable (2) to rotate, thereby adjusting the pitch angle of the radar antenna; S4. After the radar antenna is finished working, the motor (3) drives the driving wheel (11) to reverse, and the turntable (2) carries the radar antenna and is set up toward the sky; S5. The controller cuts off the circuit of the electromagnet (5), the electromagnet (5) is demagnetized, and the latch (6) is reinserted between the limit rods (4) under the action of the reset spring (9).

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