A dual-mode dual-band airborne satellite communication system

Abstract

The invention discloses a dual-mode dual-band airborne satellite communication system, which relates to the field of communication equipment, including a chassis, a signal machine box and an antenna body, wherein the chassis is connected to the signal machine box, and antenna brackets arranged on both sides of the signal machine box are connected to the antenna body, and have the following beneficial effects: when the first antenna and the second antenna are rotated and displaced, the second electromagnetic hydraulic cylinder is controlled to make the second limit clamping teeth cooperate with the tooth grooves arranged on the outer gear ring to complete the rapid braking of the first antenna and the second antenna, and the rapid displacement is convenient; an elevation and pitch auxiliary positioning component is also provided, and when the first antenna and the second antenna adjust the elevation and pitch angles, the first electromagnetic hydraulic cylinder is controlled to make the first limit clamping teeth cooperate with the tooth grooves of the first active gear to complete the limiting of the first active gear and the deflection gear, so as to achieve the limiting of the first antenna and the second antenna, and avoid the deviation of the elevation and pitch angles of the first antenna and the second antenna.

Description

Technical Field

[0001] The present invention relates to the field of communication equipment, and in particular to a dual-mode dual-band airborne satellite communication system. Background Art

[0002] With the maturity and development of satellite communication technology, its application fields are becoming wider and wider. In recent years, the airborne mobile satellite communication system based on aircraft has been highly valued and widely used by military and civilian parties at home and abroad. The airborne satellite communication system consists of an airborne satellite communication station (also known as an airborne user terminal) and a ground satellite communication station. The airborne satellite communication station is a device used to receive and transmit electromagnetic wave signals. Its performance affects the transmission of signals in the entire communication system.

[0003] The airborne satellite communication station drives the antenna to move in azimuth and pitch under the control of the control system, and performs motion compensation for the carrier's attitude angle error in real time. By rotating the antenna azimuth, the alignment and tracking of the signal target can be achieved. In the prior art, the application number CN201711414423.8 discloses a new type of airborne antenna base with coaxial and pitchable azimuth, including a second platform arranged above the first platform, the first directional antenna fixedly arranged on the first platform, and the second directional antenna arranged on the second platform; the bottom end of the first platform is fixedly connected to a rotating cylinder, and a first gear ring is clamped on the outer circumference of the rotating cylinder, and the first motor is meshed with the first gear ring through the first pinion, the bottom surface of the second platform is connected to the hollow pillar, and the bottom of the hollow pillar is equipped with a second gear ring, the second azimuth motor is meshed with the second gear ring outside the hollow pillar through the second pinion, and the second pitch motor is fixed on the second platform, the second directional antenna is arranged on the pivot, and the second pitch motor is meshed with the pitch fan gear fixed on the pivot through the third pinion, which has a more compact structure, is lighter in weight, and can adapt to more airborne platforms. However, there are defects in the use of this device: since it is installed on a carrier aircraft, vibrations will occur during the flight of the carrier aircraft, causing the satellite communication equipment to vibrate. During the pitch or rotation adjustment of the directional antenna, the device does not have any stabilizing measures for the directional antenna, which can easily cause the receiving direction of the directional antenna to deviate, thereby affecting the signal propagation. Summary of the invention

[0004] The object of the present invention is to provide a dual-mode dual-band airborne satellite communication system to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a dual-mode dual-band airborne satellite communication system, comprising a chassis, a signal box and an antenna body, the chassis is connected to a signal box, both sides of the signal box are provided with antenna brackets, and the antenna brackets provided on both sides of the antenna bracket are connected to the antenna body, which are respectively a first antenna and a second antenna, a rotating main shaft is provided at the bottom of the signal box and connected to the top of the chassis, the bottom of the rotating main shaft is located inside the chassis, and an external gear ring is integrally formed at the bottom of the rotating main shaft, a driving chamber is provided on one side of the inner cavity of the chassis, a rotating driving component connected to the external gear ring is provided in the driving chamber, both ends of the first antenna and the second antenna are connected to the antenna bracket through a rotating shaft, one side of the antenna bracket is provided with an elevation and pitch adjustment component for adjusting the elevation and pitch angles of the first antenna and the second antenna, and an elevation and pitch auxiliary positioning component is provided on the outer side wall of the antenna bracket.

[0006] Preferably, a combiner and a filter are integrated inside the chassis, the output end of the first antenna is connected to the first input end of the combiner through a signal line, the output end of the second antenna is connected to the second input end of the combiner through a signal line, and the output end of the combiner is connected to the input end of the filter.

[0007] Preferably, a bearing is provided at the junction between the top of the chassis and the rotating main shaft, a low-frequency signal slip ring is provided at the position of the rotating main shaft at the bottom of the chassis corresponding to the rotating main shaft, the rotating main shaft is a hollow shaft, the signal output end of the filter inside the chassis is connected to the signal line, the signal line passes through the middle of the rotating main shaft and extends to be connected to the input end of the low-frequency signal slip ring.

[0008] Preferably, the rotary drive assembly includes a second motor fixed in the drive chamber, the output shaft of the second motor is consistent with the axial direction of the rotating main shaft, a second driving gear is provided at the output shaft end of the second motor, and the second driving gear is meshed with the outer gear ring, and a rotary auxiliary positioning assembly is provided on one side of the outer gear ring.

[0009] Preferably, a code disc is provided at the bottom of the outer gear ring, and a matching second angle sensor is provided in the inner cavity of the chassis and on one side of the code disc.

[0010] Preferably, the rotation auxiliary positioning assembly includes a second electromagnetic hydraulic cylinder fixed on the chassis, the telescopic rod of the second electromagnetic hydraulic cylinder corresponds to the position of the outer gear ring and extends horizontally, and the end of the telescopic rod of the second electromagnetic hydraulic cylinder is provided with a second limit tooth matching the tooth groove of the outer gear ring.

[0011] Preferably, a first angle sensor is provided at the outer end of the rotating shaft of the first antenna and the second antenna away from the pitch adjustment assembly. The first angle sensor is fixed on the antenna bracket, and the shaft end of the rotating shaft connected to the first antenna and the second antenna is connected to the detection end of the first angle sensor.

[0012] Preferably, the pitch adjustment assembly includes a deflection gear fixed to the outer end of a rotating shaft on one side of the first antenna and the second antenna, and a first motor fixed to the antenna bracket by bolts. A first driving gear is provided at the output shaft end of the first motor, and the first driving gear is in transmission meshing engagement with the deflection gear.

[0013] Preferably, the pitch auxiliary positioning assembly includes a first electromagnetic hydraulic cylinder fixed on the outer side wall of the antenna bracket, the telescopic rod of the first electromagnetic hydraulic cylinder extends along the axis pointing to the first driving gear, and the end of the telescopic rod of the first electromagnetic hydraulic cylinder is provided with a first limiting tooth matching the tooth groove of the first driving gear.

[0014] Preferably, a pair of base frames are provided at the bottom of the chassis, and the bottom of the chassis is connected to the base frames via 2-3 groups of shock absorbing parts.

[0015] Technical effects and advantages of the present invention:

[0016] 1. The present invention controls the second motor to work, and the second driving gear provided at the output shaft end of the second motor and the outer gear ring at the bottom end of the rotating main shaft are used for transmission, so as to drive the signal machine box to rotate, and then the first antenna and the second antenna are rotated, so as to facilitate the first antenna and the second antenna to fully receive signals. At the same time, the second angle sensor detects the left-hand or right-hand state of the code disk and its rotation speed, so as to facilitate real-time monitoring and adjustment control thereof;

[0017] 2. The present invention controls the first motor to work, and the first driving gear and the deflection gear provided at the output shaft end of the first motor are used for transmission, thereby adjusting the pitch angles of the first antenna and the second antenna. At the same time, the first angle sensor detects the deflection angle of the rotating shaft connected to the first antenna and the second antenna, and then calculates the pitch angles of the first antenna and the second antenna, so as to facilitate real-time monitoring and adjustment of the pitch angles of the first antenna and the second antenna;

[0018] 3. The present invention is provided with a rotation auxiliary positioning component. When the first antenna and the second antenna are rotated and displaced, the telescopic rod of the second electromagnetic hydraulic cylinder is extended until the second limit tooth provided at the end thereof is engaged with the tooth groove provided on the outer gear ring to complete the rapid braking of the first antenna and the second antenna, which is convenient for rapid displacement; and an elevation auxiliary positioning component is also provided. When the first antenna and the second antenna adjust the elevation angle, the telescopic rod of the first electromagnetic hydraulic cylinder is controlled to extend until the first limit tooth provided at the end of the first electromagnetic hydraulic cylinder is engaged with the tooth groove of the first driving gear to complete the limiting of the first driving gear and the deflection gear, thereby achieving the limiting of the first antenna and the second antenna, and avoiding the deviation of the elevation angle of the first antenna and the second antenna. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is the first schematic diagram of the three-dimensional structure of the present invention.

[0020] Figure 2 This is a second schematic diagram of the three-dimensional structure of the present invention.

[0021] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0022] Figure 4 It is a front view of the structure of the present invention.

[0023] Figure 5 It is a back view of the structure of the present invention.

[0024] Figure 6 It is a front cross-sectional view of the structure of the present invention.

[0025] In the figure: 1. chassis; 2. signal machine box; 201. rotating main shaft; 202. outer gear ring; 203. code disk; 3. antenna bracket; 4. first antenna; 401. second antenna; 5. base frame; 501. shock absorber; 6. pitch adjustment assembly; 601. deflection gear; 602. first driving gear; 603. first motor; 604. first electromagnetic hydraulic cylinder; 605. first limit tooth; 7. first angle sensor; 8. second motor; 801. second driving gear; 9. second angle sensor; 10. second electromagnetic hydraulic cylinder; 1001. second limit tooth; 11. low-frequency signal slip ring. DETAILED DESCRIPTION

[0026] 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.

[0027] The present invention provides Figure 1-6 A dual-mode dual-band airborne satellite communication system shown in the figure includes a chassis 1, a signal box 2 and an antenna body. The chassis 1 is connected to the signal box 2. Antenna brackets 3 are arranged on both sides of the signal box 2. The antenna brackets 3 arranged on both sides of the antenna bracket 3 are connected to the antenna body, which are respectively a first antenna 4 and a second antenna 401. The first antenna 4 and the second antenna 401 are both dual-mode dual-band antennas. Both ends of the first antenna 4 and the second antenna 401 are connected to the antenna bracket 3 through a rotating shaft. Figure 2 and Figure 3As shown, a pitch adjustment component 6 for adjusting the pitch angles of the first antenna 4 and the second antenna 401 is provided on one side of the antenna bracket 3. The pitch adjustment component 6 includes a deflection gear 601 fixed to the outer end of a rotating shaft on one side of the first antenna 4 and the second antenna 401, and a first motor 603 fixed to the antenna bracket 3 by bolts. A first driving gear 602 is provided at the output shaft end of the first motor 603, and the first driving gear 602 is in transmission meshing with the deflection gear 601. By controlling the first motor 603 to work, the first driving gear 602 provided at the output shaft end of the first motor 603 and the deflection gear 601 are transmitted, thereby adjusting the pitch angles of the first antenna 4 and the second antenna 401. Figure 1 As shown, a first angle sensor 7 is provided at the outer end of the rotating shaft of the first antenna 4 and the second antenna 401 away from the pitch adjustment component 6. The first angle sensor 7 is fixed on the antenna bracket 3. The shaft end of the rotating shaft connected to the first antenna 4 and the second antenna 401 is connected to the detection end of the first angle sensor 7. The first angle sensor 7 detects the deflection angle of the rotating shaft connected to the first antenna 4 and the second antenna 401, and then calculates the pitch angles of the first antenna 4 and the second antenna 401, so as to facilitate real-time monitoring and adjustment of the pitch angles of the first antenna 4 and the second antenna 401.

[0028] Combination Figure 3 and Figure 5 As shown, an elevation and pitch auxiliary positioning assembly is provided on one side of the outer wall of the antenna bracket 3 corresponding to the first driving gear 602. The elevation and pitch auxiliary positioning assembly includes a first electromagnetic hydraulic cylinder 604 fixed on the outer wall of the antenna bracket 3. The telescopic rod of the first electromagnetic hydraulic cylinder 604 extends along the axis pointing to the first driving gear 602, and the end of the telescopic rod of the first electromagnetic hydraulic cylinder 604 is provided with a first limiting tooth 605 matched with the tooth groove of the first driving gear 602. When the first antenna 4 and the second antenna 401 adjust the elevation and pitch angles, the telescopic rod of the first electromagnetic hydraulic cylinder 604 is controlled to extend until the first limiting tooth 605 provided at the end of the first electromagnetic hydraulic cylinder 604 is matched with the tooth groove of the first driving gear 602, thereby completing the limiting of the first driving gear 602 and the deflection gear 601, achieving the limiting of the first antenna 4 and the second antenna 401, and avoiding the deviation of the elevation and pitch angles of the first antenna 4 and the second antenna 401.

[0029] A rotating spindle 201 is provided at the bottom of the signal machine box 2 to be transferred to the top of the chassis 1, and a bearing is provided at the transfer point between the top of the chassis 1 and the rotating spindle 201. The bottom of the rotating spindle 201 is located inside the chassis 1, and an outer gear ring 202 is integrally formed at the bottom of the rotating spindle 201. A driving chamber is provided on one side of the inner cavity of the chassis 1, and a rotating driving assembly connected to the outer gear ring 202 is provided in the driving chamber. The rotating driving assembly includes a second motor 8 fixed in the driving chamber, and the output shaft of the second motor 8 is consistent with the axial direction of the rotating spindle 201. A second driving gear 801 is provided at the output shaft end of the second motor 8, and the second driving gear 801 is connected to the outer gear ring 202. 02 are meshed, and the second motor 8 is controlled to work. The second driving gear 801 set at the output shaft end of the second motor 8 transmits the outer gear ring 202 at the bottom of the rotating main shaft 201, driving the signal machine box 2 to rotate, and then the first antenna 4 and the second antenna 401 are rotated, which is convenient for the first antenna 4 and the second antenna 401 to fully receive signals. A code disk 203 is provided at the bottom of the outer gear ring 202, and a matching second angle sensor 9 is provided in the inner cavity of the chassis 1 and on one side of the code disk 203. The second angle sensor 9 detects the left-hand or right-hand state of the code disk 203 and its rotation speed, which is convenient for real-time monitoring and adjustment control.

[0030] A rotation auxiliary positioning component is provided on one side of the outer gear ring 202, and the rotation auxiliary positioning component includes a second electromagnetic hydraulic cylinder 10 fixed on the chassis 1, and the telescopic rod of the second electromagnetic hydraulic cylinder 10 corresponds to the position of the outer gear ring 202 and extends horizontally. The end of the telescopic rod of the second electromagnetic hydraulic cylinder 10 is provided with a second limit tooth 1001 that matches the tooth groove of the outer gear ring 202. When the first antenna 4 and the second antenna 401 are rotated and displaced, the telescopic rod of the second electromagnetic hydraulic cylinder 10 is extended until the second limit tooth 1001 provided at its end is matched with the tooth groove provided on the outer gear ring 202, thereby completing the rapid braking of the first antenna 4 and the second antenna 401, and facilitating rapid displacement.

[0031] A combiner and a filter are integrated inside the chassis 1. The output end of the first antenna 4 is connected to the first input end of the combiner through a signal line, and the output end of the second antenna 401 is connected to the second input end of the combiner through a signal line. The combiner combines the signals received by the first antenna 4 and the second antenna 401 to enhance the signal. The output end of the combiner is connected to the input end of the filter. The existence of the filter improves the isolation of signal transmission. A low-frequency signal slip ring 11 is provided at the position of the rotating main shaft 201 at the bottom of the chassis 1. The rotating main shaft 201 is a hollow rotating shaft. The signal output end of the filter inside the chassis 1 is connected to the signal line. The signal line passes through the middle of the rotating main shaft 201 and extends to be connected to the input end of the low-frequency signal slip ring 11. Since the signal machine box 2 needs to rotate when working, the low-frequency signal slip ring 11 is provided to solve the winding problem when the signal machine box 2 rotates.

[0032] like Figure 2 and Figure 4 As shown, a pair of base frames 5 are provided at the bottom of the chassis 1, and the bottom of the chassis 1 is connected to the base frames 5 through 2-3 groups of shock absorbers 501, and the base frames 5 are fixed to the carrier by bolts. The shock absorbers 501 are used to buffer the vibrations generated during the operation of the carrier.

[0033] Working principle of the present invention: When the present invention is working, the second motor 8 is controlled to work, and the second driving gear 801 set at the output shaft end of the second motor 8 and the outer gear ring 202 at the bottom of the rotating main shaft 201 are transmitted to drive the signal machine box 2 to rotate, thereby rotating the first antenna 4 and the second antenna 401, which is convenient for the first antenna 4 and the second antenna 401 to fully receive signals. At the same time, the second angle sensor 9 detects the left-handed or right-handed state of the code disk 203 and its rotation speed, which is convenient for real-time monitoring and adjustment control; the present invention is provided with a rotation auxiliary positioning component. When the first antenna 4 and the second antenna 401 are rotated and displaced, the telescopic rod of the second electromagnetic hydraulic cylinder 10 is extended until the second limit tooth 1001 set at its end is matched with the tooth groove set by the outer gear ring 202, so as to complete the rapid braking of the first antenna 4 and the second antenna 401, which is convenient for rapid displacement;

[0034] By controlling the first motor 603 to work, the first driving gear 602 and the deflection gear 601 provided at the output shaft end of the first motor 603 are transmitted, thereby adjusting the pitch angles of the first antenna 4 and the second antenna 401. At the same time, the first angle sensor 7 detects the deflection angle of the rotating shaft connected to the first antenna 4 and the second antenna 401, thereby calculating the pitch angles of the first antenna 4 and the second antenna 401, so as to facilitate real-time monitoring and adjustment of the pitch angles of the first antenna 4 and the second antenna 401. The present invention is provided with a pitch auxiliary positioning assembly. When the pitch angles of the first antenna 4 and the second antenna 401 are adjusted, the telescopic rod of the first electromagnetic hydraulic cylinder 604 is controlled to extend until the first limiting tooth 605 provided at the end of the first electromagnetic hydraulic cylinder 604 is engaged with the tooth groove of the first driving gear 602, thereby completing the limiting of the first driving gear 602 and the deflection gear 601, achieving the limiting of the first antenna 4 and the second antenna 401, and avoiding the deviation of the pitch angles of the first antenna 4 and the second antenna 401.

[0035] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A dual-mode dual-band airborne satellite communication system, comprising a chassis (1), a signal box (2) and an antenna body, characterized in that: The chassis (1) is connected to a signal machine box (2), both sides of the signal machine box (2) are provided with antenna brackets (3), and the antenna brackets (3) provided on both sides of the antenna bracket (3) are connected to antenna bodies, which are respectively a first antenna (4) and a second antenna (401). The bottom of the signal machine box (2) is provided with a rotating main shaft (201) which is connected to the top of the chassis (1), the bottom of the rotating main shaft (201) is located inside the chassis (1), and the bottom of the rotating main shaft (201) is integrally formed with an outer gear ring (202), one side of the inner cavity of the chassis (1) is provided with a driving chamber, and the driving chamber is provided with a rotating driving component which is transmission-connected to the outer gear ring (202), both ends of the first antenna (4) and the second antenna (401) are connected to the antenna bracket (3) through a rotating shaft, one side of the antenna bracket (3) is provided with an elevation adjustment component (6) for adjusting the elevation angle of the first antenna (4) and the second antenna (401), and the outer side wall of the antenna bracket (3) is provided with an elevation auxiliary positioning component; The rotary drive assembly comprises a second motor (8) fixed in the drive chamber, the output shaft of the second motor (8) being consistent with the axial direction of the rotary main shaft (201), a second driving gear (801) being provided at the output shaft end of the second motor (8), and the second driving gear (801) being meshed with the outer gear ring (202), and a rotary auxiliary positioning assembly being provided on one side of the outer gear ring (202); The rotation auxiliary positioning assembly comprises a second electromagnetic hydraulic cylinder (10) fixed on the chassis (1); a telescopic rod of the second electromagnetic hydraulic cylinder (10) corresponds to the position of the outer gear ring (202) and extends horizontally; and a second limit tooth (1001) matching the tooth groove of the outer gear ring (202) is provided at the end of the telescopic rod of the second electromagnetic hydraulic cylinder (10); The pitch adjustment assembly (6) comprises a first antenna (4), a deflection gear (601) fixed to the outer end of a rotating shaft on one side of the second antenna (401), and a first motor (603) fixed to the antenna bracket (3) by means of bolts, wherein a first driving gear (602) is provided at the output shaft end of the first motor (603), and the first driving gear (602) is in driving meshing engagement with the deflection gear (601); The pitch auxiliary positioning assembly comprises a first electromagnetic hydraulic cylinder (604) fixed on the outer side wall of the antenna bracket (3); a telescopic rod of the first electromagnetic hydraulic cylinder (604) extends along an axis pointing to the first driving gear (602); and a first limit tooth (605) matching the tooth groove of the first driving gear (602) is provided at the end of the telescopic rod of the first electromagnetic hydraulic cylinder (604).

2. The dual-mode dual-band airborne satellite communication system according to claim 1, characterized in that: The chassis (1) contains a combiner and a filter, the output end of the first antenna (4) is connected to the first input end of the combiner via a signal line, the output end of the second antenna (401) is connected to the second input end of the combiner via a signal line, and the output end of the combiner is connected to the input end of the filter.

3. The dual-mode dual-band airborne satellite communication system according to claim 1, characterized in that: A bearing is provided at the junction between the top of the chassis (1) and the rotating main shaft (201); a low-frequency signal slip ring (11) is provided at a position of the bottom of the chassis (1) corresponding to the rotating main shaft (201); the rotating main shaft (201) is a hollow rotating shaft; a signal output end of the filter inside the chassis (1) is connected to a signal line; the signal line passes through the middle of the rotating main shaft (201) and extends to be connected to an input end of the low-frequency signal slip ring (11).

4. The dual-mode dual-band airborne satellite communication system according to claim 1, characterized in that: A code disc (203) is provided at the bottom of the outer gear ring (202), and a matching second angle sensor (9) is provided in the inner cavity of the chassis (1) and located on one side of the code disc (203).

5. The dual-mode dual-band airborne satellite communication system according to claim 1, characterized in that: A first angle sensor (7) is provided at the outer end of the rotating shaft of the first antenna (4) and the second antenna (401) on the side away from the pitch adjustment assembly (6); the first angle sensor (7) is fixed on the antenna bracket (3); and the shaft end of the rotating shaft to which the first antenna (4) and the second antenna (401) are connected is connected to the detection end of the first angle sensor (7).

6. The dual-mode dual-band airborne satellite communication system according to claim 1, characterized in that: A pair of bottom frames (5) are provided at the bottom of the chassis (1), and the bottom of the chassis (1) is connected to the bottom frames (5) via 2-3 groups of shock absorbing components (501).

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