High-stability satellite communication device

Abstract

A high-stability satellite communication device disclosed by the present invention comprises a mounting base, the top of the mounting base is provided with a mounting groove, the mounting groove is connected with a mounting plate through a vibration damping device, the upper side of the mounting plate is rotatably connected with a rotating column, and the side wall of the rotating column is fixedly connected with a second gear. The side wall of the second gear is in meshed connection with a first gear, the upper side wall of the mounting plate is fixedly connected with a first motor, an output shaft of the first motor is fixedly connected to the bottom side wall of the first gear, and the upper end of the rotating column is connected with a satellite receiving disc through a pitching adjusting device. The system further comprises a central controller, and a damping regulation and control unit and a dynamic tracking unit are arranged in the central controller. According to the invention, the satellite receiving disc can still keep high-precision pointing under the conditions of high-frequency vibration and attitude change of the mobile carrier, and the signal stability is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of satellite communications, and in particular to a high-stability satellite communications device. Background Art

[0002] A satellite receiver is an electronic device that converts the output signal of a satellite downconverter LNB into an audio / video signal or a radio frequency signal. It is a form of broadcasting that uses geosynchronous satellites to transmit digitally encoded compressed signals to the user end.

[0003] However, existing satellite communication devices have the following problems: 1. Insufficient mechanical structure stability: Traditional antenna stabilization platforms use friction dampers. Under high-frequency vibrations (such as ship deck vibration frequency > 20 Hz), the pointing accuracy drops to below 0.5°, making it difficult to meet the stringent requirements of Ka-band satellite communications (beamwidth ≈ 1.2°), resulting in low signal stability.

[0004] 2. Low dynamic tracking accuracy: When the posture of a mobile carrier (such as an aircraft or ship) changes, the antenna pointing direction is easily offset. Summary of the Invention

[0005] The present invention provides a high-stability satellite communication device to solve the problems raised in the above background technology.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A high-stability satellite communication device includes a mounting base, a mounting slot formed on a top of the mounting base, the mounting slot being connected to a mounting plate via a vibration damping device, a rotating column being rotatably connected to an upper side of the mounting plate, a second gear being fixedly connected to a side wall of the rotating column, a first gear being meshedly connected to a side wall of the second gear, a first motor being fixedly connected to an upper side wall of the mounting plate, an output shaft of the first motor being fixedly connected to a bottom side wall of the first gear, and a satellite receiving dish being connected to an upper end of the rotating column via a pitch adjustment device. It also includes a central controller, in which a damping control unit and a dynamic tracking unit are arranged.

[0007] As a further improvement of the present technical solution: the vibration damping device includes a fixed cylinder, which is fixedly connected to the bottom of the mounting groove of the mounting base, the fixed cylinder is filled with magnetorheological fluid, and a piston plate is slidably connected to the fixed cylinder, and a support column is fixedly connected to the upper side of the piston plate, and the support column passes through the upper side wall of the fixed cylinder and is fixedly connected to the bottom side wall of the mounting plate. A plurality of vibration sensors are provided on the side wall of the piston plate, and an electromagnetic coil is sleeved on the outer side wall of the fixed cylinder. The electromagnetic coil generates magnetic fields of different intensities under different input voltages, and a plurality of springs are fixedly connected between the bottom side of the mounting plate and the bottom of the mounting groove of the mounting base.

[0008] As a further improvement of the present technical solution: a vibration sensor is provided on the outer wall of the mounting base, and the vibration sensor is electrically connected to the central controller. The damping control unit is used to control the input voltage of the electromagnetic coil through a voltage control formula according to the vibration frequency of the mounting base detected by the vibration sensor. Changing the coil voltage of the electromagnetic coil can adjust the magnetic field strength inside the electromagnetic coil. The change in magnetic field strength causes the damping coefficient of the magnetorheological fluid in the fixed cylinder to change, thereby greatly suppressing the transmission of vibration energy to the spring.

[0009] As a further improvement of this technical solution: the voltage control formula is:

[0010] in, is the voltage value of the electromagnetic coil; is the basic voltage; is the frequency sensitivity coefficient; The real-time vibration frequency detected by the vibration sensor; is the target frequency.

[0011] As a further improvement of the present technical solution: the pitch adjustment device includes two fixed plates, both of which are fixedly connected to the upper end of the rotating column, a rotating shaft passing through the two fixed plates and connected in rotation, a support plate is fixedly connected to one side of the fixed plate, a second motor is fixedly connected to the upper side of the support plate, the output shaft of the second motor is fixedly connected to one end of the rotating shaft, a connecting block is fixedly connected to the rotating shaft, and the satellite receiving dish is fixedly connected to one end of the connecting block.

[0012] As a further improvement of the present technical solution: an azimuth sensor and a pitch angle sensor are provided on the side wall of the satellite receiving dish, the azimuth sensor adopts a dual-axis gyroscope, and the pitch angle sensor adopts an inclination sensor. The first motor, the second motor, the azimuth sensor and the pitch angle sensor are all electrically connected to the central controller. The dynamic tracking unit is used to monitor the posture of the satellite receiving dish in real time according to the pitch angle sensor and the azimuth sensor, and then drive the second motor and the first motor to dynamically adjust the pitch angle and azimuth angle of the satellite receiving dish to ensure that the satellite receiving dish is always aligned with the satellite.

[0013] As a further improvement of this technical solution: the dynamic tracking unit is used to monitor the attitude of the satellite receiving dish in real time based on the pitch angle sensor and the azimuth angle sensor, and then drive the second motor and the first motor to dynamically adjust the pitch angle and azimuth angle of the satellite receiving dish to ensure that the satellite receiving dish is always aligned with the satellite. Specifically: The first step is to obtain the actual azimuth angle A of the satellite receiving dish through the azimuth sensor and pitch angle sensor. 实际 and the actual pitch angle E 实际 ; The second step is to calculate the theoretical azimuth angle A through the azimuth adjustment formula. 理论 And the theoretical pitch angle E is calculated by the pitch angle adjustment formula 理论 ;

[0014] in, is the difference between the satellite longitude and the longitude of the satellite receiving dish receiving point; is the satellite latitude; is the latitude of the receiving point;

[0015] Where R is the radius of the earth, h is the altitude of the satellite orbit, is the difference between the satellite longitude and the longitude of the satellite receiving dish receiving point; is the satellite latitude; is the latitude of the receiving point; The third step is to adjust the rotation angle of the second motor and the first motor so that the satellite receiving dish is always aligned with the satellite, where the rotation angle of the second motor ΔE=E 理论 −E 实际 , the rotation angle of the first motor is ΔA=A 理论 −A 实际 .

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. High mechanical structure stability: The vibration damping device of the present invention adopts magnetorheological fluid and electromagnetic coil. The damping control unit adjusts the input voltage of the electromagnetic coil according to the vibration frequency, thereby changing the damping coefficient of the magnetorheological fluid, effectively suppressing the transmission of vibration energy to the spring, improving the stability of the mechanical structure, and being able to meet the stringent requirements of Ka-band satellite communications in high-frequency vibration environments.

[0017] 2. High dynamic tracking accuracy: The azimuth sensor and pitch angle sensor are used to monitor the attitude of the satellite receiving dish in real time. The dynamic tracking unit drives the first motor and the second motor according to the monitoring data, so that the satellite receiving dish can be dynamically adjusted in pitch and azimuth, ensuring that the satellite receiving dish is always aligned with the satellite, solving the problem of easy deviation of the antenna pointing when the attitude of the mobile carrier changes.

[0018] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and to implement it according to the contents of the description, the following preferred embodiments of the present invention are described in detail with reference to the accompanying drawings. The specific implementation methods of the present invention are given in detail by the following embodiments and the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings: Figure 1 This is a schematic diagram of the back structure of a high-stability satellite communication device proposed by the present invention; Figure 2 for Figure 1 A schematic diagram of the partially enlarged structure of the middle part; Figure 3 This is a schematic diagram of the front structure of a high-stability satellite communication device proposed by the present invention; Figure 4 This is a schematic diagram of the bottom structure of the mounting plate proposed by the present invention; Figure 5 This is a schematic diagram of the internal cross-sectional structure of the mounting base of the present invention; Figure 6 It is a structural schematic diagram of the support column and piston plate in the present invention.

[0020] In the accompanying drawings, the components represented by the reference numerals are as follows: 1. Mounting base; 2. First motor; 3. First gear; 4. Second motor; 5. Satellite receiving dish; 6. Azimuth sensor; 7. Pitch sensor; 8. Connecting block; 9. Rotating column; 10. Second gear; 11. Mounting plate; 12. Fixing plate; 13. Rotating shaft; 14. Support plate; 15. Spring; 16. Magnetorheological fluid; 17. Support column; 18. Piston plate; 19. Electromagnetic coil; 20. Fixing cylinder; 21. Vibration sensor. DETAILED DESCRIPTION

[0021] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples provided are intended only to illustrate the present invention and are not intended to limit the scope of the present invention. The following paragraphs describe the present invention in more detail by way of example with reference to the accompanying drawings. It should be noted that the drawings are all in a very simplified form and are not to exact scale, and are only used for the purpose of conveniently and clearly illustrating the embodiments of the present invention.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one skilled in the art to which this invention pertains. The terms used in this specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0023] See also Figures 1 to 6 In an embodiment of the present invention, a high-stability satellite communication device includes a mounting base 1, a mounting slot is formed on the top of the mounting base 1, and a mounting plate 11 is connected to the mounting slot through a vibration damping device. A rotating column 9 is rotatably connected to the upper side of the mounting plate 11, a second gear 10 is fixedly connected to the side wall of the rotating column 9, and a first gear 3 is meshedly connected to the side wall of the second gear 10. A first motor 2 is fixedly connected to the upper side wall of the mounting plate 11, and the output shaft of the first motor 2 is fixedly connected to the bottom side wall of the first gear 3. The upper end of the rotating column 9 is connected to a satellite receiving dish 5 through a pitch adjustment device. The pitch adjustment device includes two fixing plates 12, both of which are fixedly connected to the upper end of the rotating column 9. A rotating shaft 13 is rotatably connected to the two fixing plates 12. A support plate 14 is fixedly connected to one side of the fixing plate 12. The upper side of the support plate 14 is fixedly connected to the second motor 4. The output shaft of the second motor 4 is fixedly connected to one end of the rotating shaft 13. A connecting block 8 is fixedly connected to the rotating shaft 13, and the satellite receiving dish 5 is fixedly connected to one end of the connecting block 8. It also includes a central controller, which is equipped with a damping control unit and a dynamic tracking unit.

[0024] Specifically, the vibration damping device includes a fixed cylinder 20, which is fixedly connected to the bottom of the mounting groove of the mounting base 1, and the fixed cylinder 20 is filled with magnetorheological fluid 16. A piston plate 18 is slidably connected to the fixed cylinder 20, and a support column 17 is fixedly connected to the upper side of the piston plate 18. The support column 17 passes through the upper side wall of the fixed cylinder 20 and is fixedly connected to the bottom side wall of the mounting plate 11. A plurality of vibration sensors 21 are provided on the side wall of the piston plate 18, and an electromagnetic coil 19 is sleeved on the outer wall of the fixed cylinder 20. The electromagnetic coil 19 generates magnetic fields of different intensities under different input voltages. The mounting plate 1 A plurality of springs 15 are fixedly connected between the bottom side of the mounting base 1 and the bottom of the mounting groove of the mounting base 1. A vibration sensor 21 is provided on the outer wall of the mounting base 1. The vibration sensor 21 is electrically connected to the central controller. The damping control unit is used to control the input voltage of the electromagnetic coil 19 through a voltage control formula according to the vibration frequency of the mounting base 1 detected by the vibration sensor 21. Changing the coil voltage of the electromagnetic coil 19 can adjust the magnetic field strength within the electromagnetic coil 19. The change in magnetic field strength causes the damping coefficient of the magnetorheological fluid 16 in the fixed cylinder 20 to change, thereby greatly suppressing the transmission of vibration energy to the spring 15.

[0025] The voltage control formula is:

[0026] in, is the voltage value of the electromagnetic coil; is the basic voltage; is the frequency sensitivity coefficient; The real-time vibration frequency detected by the vibration sensor; is the target frequency.

[0027] Specifically, an azimuth sensor 6 and a pitch angle sensor 7 are provided on the side wall of the satellite receiving dish 5. The first motor 2, the second motor 4, the azimuth sensor 6 and the pitch angle sensor 7 are all electrically connected to the central controller. The azimuth sensor 6 adopts a dual-axis gyroscope, and the pitch angle sensor 7 adopts an inclination sensor. The dynamic tracking unit is used to monitor the attitude of the satellite receiving dish 5 in real time based on the pitch angle sensor 7 and the azimuth angle sensor 6, and then drive the second motor 4 and the first motor 2 to dynamically adjust the pitch angle and azimuth angle of the satellite receiving dish 5 to ensure that the satellite receiving dish 5 is always aligned with the satellite. Specifically: The first step is to obtain the actual azimuth angle A of the satellite receiving dish 5 through the azimuth sensor 6 and the pitch angle sensor 7. 实际 and the actual pitch angle E 实际 ; The second step is to calculate the theoretical azimuth angle A through the azimuth adjustment formula. 理论 And the theoretical pitch angle E is calculated by the pitch angle adjustment formula 理论 ; The azimuth adjustment formula is:

[0028] in, is the difference between the satellite longitude and the longitude of the receiving point of the satellite receiving dish 5; is the satellite latitude; is the latitude of the receiving point; The pitch angle adjustment formula is:

[0029] Where R is the radius of the earth, h is the altitude of the satellite orbit, is the difference between the satellite longitude and the longitude of the receiving point of the satellite receiving dish 5; is the satellite latitude; is the latitude of the receiving point; The third step is to adjust the rotation angles of the second motor 4 and the first motor 2 so that the satellite receiving dish 5 is always aligned with the satellite, wherein the rotation angle of the second motor 4 is ΔE=E 理论 −E 实际 , the rotation angle of the first motor 2 is ΔA=A 理论 −A 实际 .

[0030] The working principle of the present invention is: 1. Implementation of vibration damping adjustment: When the mounting base 1 is vibrated, the vibration sensor 21 detects the vibration frequency and transmits the signal to the damping control unit of the central controller. The damping control unit adjusts the voltage according to the voltage control formula The input voltage of the electromagnetic coil 19 is calculated and adjusted. The electromagnetic coil 19 generates magnetic fields of varying strengths, causing the damping coefficient of the magnetorheological fluid 16 in the fixed cylinder 20 to change, thereby suppressing the transmission of vibration energy to the spring 15 and reducing the vibration of the mounting plate 11.

[0031] 2. Dynamic tracking implementation: The azimuth sensor 6 and the pitch angle sensor 7 monitor the actual azimuth angle A of the satellite receiving dish 5 in real time. 实际 and the actual pitch angle E 实际 The data is transmitted to the dynamic tracking unit of the central controller. The dynamic tracking unit calculates the theoretical azimuth angle A according to the azimuth adjustment formula and the pitch angle adjustment formula. 理论 and the theoretical pitch angle E 理论 The dynamic tracking unit calculates the rotation angle of the second motor 4 ΔE=E 理论 −E 实际 and the rotation angle of the first motor 2 ΔA=A 理论 −A 实际, and drives the second motor 4 and the first motor 2 to rotate corresponding angles, so that the satellite receiving dish 5 can be dynamically adjusted in pitch angle and azimuth angle to always align with the satellite.

[0032] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any ordinary technician in this industry can smoothly implement the present invention as shown in the drawings and described above. However, any equivalent changes, modifications and evolutions made by technicians familiar with this profession without departing from the scope of the technical solution of the present invention using the technical content disclosed above are all equivalent embodiments of the present invention. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the present invention are still within the scope of protection of the technical solution of the present invention.

Claims

1. A high-stability satellite communication device, comprising a mounting base (1), characterized in that: The top of the mounting base (1) is provided with a mounting groove, the mounting groove is connected to a mounting plate (11) via a vibration damping device, the upper side of the mounting plate (11) is rotatably connected to a rotating column (9), a second gear (10) is fixedly connected to the side wall of the rotating column (9), the side wall of the second gear (10) is meshedly connected to the first gear (3), the upper side wall of the mounting plate (11) is fixedly connected to a first motor (2), the output shaft of the first motor (2) is fixedly connected to the bottom side wall of the first gear (3), and the upper end of the rotating column (9) is connected to a satellite receiving dish (5) via a pitch adjustment device; It also includes a central controller, in which a damping control unit and a dynamic tracking unit are arranged.

2. A high-stability satellite communication device according to claim 1, characterized in that: The vibration damping device includes a fixed cylinder (20), the fixed cylinder (20) is fixedly connected to the bottom of the mounting groove of the mounting base (1), the fixed cylinder (20) is filled with magnetorheological fluid (16), the fixed cylinder (20) is slidably connected to a piston plate (18), the upper side of the piston plate (18) is fixedly connected to a support column (17), the support column (17) passes through the upper side wall of the fixed cylinder (20) and is fixedly connected to the bottom side wall of the mounting plate (11), a plurality of vibration sensors (21) are provided on the side wall of the piston plate (18), an electromagnetic coil (19) is sleeved on the outer side wall of the fixed cylinder (20), the electromagnetic coil (19) generates magnetic fields of different intensities under different input voltages, and a plurality of springs (15) are fixedly connected between the bottom side of the mounting plate (11) and the bottom of the mounting groove of the mounting base (1).

3. A high-stability satellite communication device according to claim 2, characterized in that: A vibration sensor (21) is provided on the outer wall of the mounting base (1), and the vibration sensor (21) is electrically connected to the central controller. The damping control unit is used to control the input voltage of the electromagnetic coil (19) through a voltage control formula according to the vibration frequency of the mounting base (1) detected by the vibration sensor (21). Changing the coil voltage of the electromagnetic coil (19) can adjust the magnetic field strength in the electromagnetic coil (19). The change in magnetic field strength causes the damping coefficient of the magnetorheological fluid (16) in the fixed cylinder (20) to change, thereby greatly suppressing the transmission of vibration energy to the spring (15).

4. A high-stability satellite communication device according to claim 3, characterized in that: The voltage control formula is:

5. Among them, is the voltage value of the electromagnetic coil; is the basic voltage; is the frequency sensitivity coefficient; The real-time vibration frequency detected by the vibration sensor; is the target frequency.

6. A high-stability satellite communication device according to claim 4, characterized in that: The pitch adjustment device comprises two fixed plates (12), both of the fixed plates (12) are fixedly connected to the upper end of the rotating column (9), a rotating shaft (13) is rotatably connected to the two fixed plates (12), a support plate (14) is fixedly connected to one side of the fixed plate (12), a second motor (4) is fixedly connected to the upper side of the support plate (14), an output shaft of the second motor (4) is fixedly connected to one end of the rotating shaft (13), a connecting block (8) is fixedly connected to the rotating shaft (13), and the satellite receiving dish (5) is fixedly connected to one end of the connecting block (8).

7. The high-stability satellite communication device according to claim 5, characterized in that: An azimuth sensor (6) and a pitch angle sensor (7) are provided on the side wall of the satellite receiving dish (5), the azimuth sensor (6) adopts a dual-axis gyroscope, and the pitch angle sensor (7) adopts an inclination sensor. The first motor (2), the second motor (4), the azimuth sensor (6), and the pitch angle sensor (7) are all electrically connected to the central controller. The dynamic tracking unit is used to monitor the attitude of the satellite receiving dish (5) in real time according to the pitch angle sensor (7) and the azimuth sensor (6), and then drive the second motor (4) and the first motor (2) to enable the satellite receiving dish (5) to dynamically adjust the pitch angle and azimuth angle, thereby ensuring that the satellite receiving dish (5) is always aligned with the satellite.

8. A high-stability satellite communication device according to claim 7, characterized in that: The dynamic tracking unit is used to monitor the attitude of the satellite receiving dish (5) in real time according to the pitch angle sensor (7) and the azimuth angle sensor (6), and then drive the second motor (4) and the first motor (2) to make the satellite receiving dish (5) dynamically adjust the pitch angle and the azimuth angle to ensure that the satellite receiving dish (5) is always aligned with the satellite, specifically: The first step is to obtain the actual azimuth angle A of the satellite receiving dish (5) through the azimuth sensor (6) and the pitch angle sensor (7). 实际 and the actual pitch angle E 实际 ; The second step is to calculate the theoretical azimuth angle A through the azimuth adjustment formula. 理论 And the theoretical pitch angle E is calculated by the pitch angle adjustment formula 理论 ; The azimuth adjustment formula is:

9. Among them, is the difference between the satellite longitude and the longitude of the receiving point of the satellite receiving dish (5); is the satellite latitude; is the latitude of the receiving point; The pitch angle adjustment formula is:

10. Among them, R is the radius of the earth, h is the altitude of the satellite orbit, is the difference between the satellite longitude and the longitude of the receiving point of the satellite receiving dish (5); is the satellite latitude; is the latitude of the receiving point; The third step is to adjust the rotation angles of the second motor (4) and the first motor (2) so that the satellite receiving dish (5) is always aligned with the satellite, wherein the rotation angle of the second motor (4) is ΔE=E 理论 −E 实际 , the rotation angle of the first motor (2) is ΔA=A 理论 −A 实际 .

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