A two-dimensional direct-drive tracking mechanism based on quantum communication

Abstract

The invention discloses a two-dimensional direct-drive tracking mechanism based on quantum communication, including an azimuth mechanism, a support frame, a pitch mechanism and a control unit, wherein the lower end of the support frame is connected to the azimuth mechanism, the upper end is connected to the pitch mechanism, the pitch mechanism is connected to the astronomical telescope tube, the azimuth mechanism and the pitch mechanism are electrically connected to the control unit respectively, the azimuth mechanism can drive the support frame to rotate in the horizontal plane, and the pitch mechanism can drive the astronomical telescope tube to rotate in the vertical plane. Through the two-dimensional direct-drive tracking mechanism based on quantum communication of the invention, a small portable signal transmitting and receiving station can be constructed, which is small in size, light in weight, convenient for transportation, simple in operation, and the weight of the whole device is less than 100Kg, which greatly reduces the cost and improves the mobility and work efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of tracking mechanisms, and in particular to a two-dimensional direct-drive tracking mechanism based on quantum communication. Background Art

[0002] Traditional quantum communication ground signal transmitting and receiving stations have complex structures, large sizes, and weights greater than 1 ton, resulting in high transportation costs, inconvenient operations, and low work efficiency. Summary of the invention

[0003] The purpose of the present invention is to provide a two-dimensional direct-drive tracking mechanism based on quantum communication to solve the problems existing in the above-mentioned prior art, significantly reduce the size and weight of the quantum communication ground station, and improve the maneuverability and work efficiency.

[0004] To achieve the above object, the present invention provides the following solutions:

[0005] The present invention provides a two-dimensional direct-drive tracking mechanism based on quantum communication, comprising an azimuth mechanism, a support frame, a pitch mechanism and a control unit, wherein the lower end of the support frame is connected to the azimuth mechanism, and the upper end is connected to the pitch mechanism, the pitch mechanism is connected to an astronomical telescope tube, the azimuth mechanism and the pitch mechanism are electrically connected to the control unit respectively, the azimuth mechanism can drive the support frame to rotate in a horizontal plane, and the pitch mechanism can drive the astronomical telescope tube to rotate in a vertical plane.

[0006] Preferably, the support frame is L-shaped and hollow inside, the azimuth mechanism is arranged on the horizontal arm of the support frame, the pitch mechanism is arranged on the top of the vertical arm, and the astronomical telescope barrel is located above the horizontal arm.

[0007] Preferably, the azimuth mechanism or the pitch mechanism comprises a machine base, a drive motor, a rotating shaft, a bearing assembly and an angle measuring assembly; the machine base is provided with the drive motor, the bearing assembly and the angle measuring assembly; two ends of the rotating shaft are respectively provided with a bearing assembly; the stator seat of the drive motor is connected to the machine base, and the rotor seat is connected to the rotating shaft; the angle measuring assembly is provided at the lower end of the rotating shaft, and the bearing assembly is provided between the two ends of the rotating shaft and the machine base.

[0008] Preferably, the rotating shaft is a hollow shaft, a stepped shaft hole is arranged in the hollow shaft, and the top of the hollow shaft of the orientation mechanism is connected with a tooling connector for detection by bolts.

[0009] Preferably, the lower end of the machine base is connected to one of the bearing assemblies by bolts through a bearing bracket, and the upper port is connected to the bearing seat of another bearing assembly by bolts. The bottom of the machine base is connected to a base plate by bolts, a cable fixing plate is provided at the lower end of the machine base, and a wiring aviation plug is provided on the side wall of the machine base.

[0010] Preferably, the angle measuring assembly comprises an angle encoder, the stator of the angle encoder is connected to the bearing bracket via bolts, the rotor is connected to the rotating shaft via bolts, and the drive motor and the angle encoder are both electrically connected to the control unit.

[0011] Preferably, the bearing assembly includes a bearing end cover, an angular contact ball bearing, a spacer and a bearing seat, one or two angular contact ball bearings are arranged between the bearing end cover and the bearing seat, an inner spacer and an outer spacer are arranged between the two angular contact ball bearings, and the bearing seat is threadedly connected to the rotating shaft through a locking sleeve or bolts.

[0012] Preferably, an angle limiting mechanism is arranged between the base of the orientation mechanism and the support frame, and the angle limiting mechanism includes a stop pin, a V-shaped block, a pin shaft, a magnet, a light shielding sheet and a photoelectric sensor, the stop pin is arranged on the support frame, the V-shaped block is rotatably arranged on the side wall of the base through the pin shaft, the stop pin can touch the side wall of the V-shaped block, the magnet and the light shielding sheet are respectively arranged on the two side walls of the V-shaped block, the photoelectric sensor is arranged on the base and is located below the V-shaped block, the magnet can be adsorbed on the step surface of the base during rotation and cause the light shielding sheet to trigger the photoelectric sensor, and the photoelectric sensor is electrically connected to the control unit.

[0013] Preferably, a pitch angle limiting mechanism is arranged between the rotating shaft of the pitch mechanism and the supporting frame, the pitch angle limiting mechanism comprises a mechanical limiting mechanism and a photoelectric limiting mechanism arranged at both ends of the rotating shaft, the mechanical limiting mechanism comprises a spring plunger and a rotating block, two spring plungers with a set central angle are fixedly arranged on the bearing seat of the bearing assembly, the rotating block is connected to the rotating shaft, the rotating block and the spring plunger are in the same plane, and the rotating block can trigger the spring plunger; the photoelectric limiting mechanism comprises a fan-shaped baffle and a photoelectric sensor, the fan-shaped baffle is connected to the rotating shaft, the two photoelectric sensors are arranged on the base of the pitch mechanism at a central angle of 180°, the fan-shaped baffle can trigger the photoelectric sensor, and the set central angle = 180°-the central angle of the fan-shaped baffle.

[0014] Preferably, when the pitch mechanism rotates, the rotation angle range of the pitch angle limiting mechanism is -5° to +95°; when the azimuth mechanism rotates, the rotation angle range of the rotation angle limiting mechanism is -360° to +360°.

[0015] Compared with the prior art, the present invention has achieved the following technical effects:

[0016] The two-dimensional direct-drive tracking mechanism based on quantum communication of the present invention can be used to construct a small portable signal transmitting and receiving station with small size, light weight, convenient transportation, simple operation, and a total weight of less than 100 kg, which greatly reduces costs and improves mobility and work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 The structure diagram of the two-dimensional direct-drive tracking mechanism based on quantum communication of the present invention is shown in FIG. Figure 1 ;

[0019] Figure 2 The structure diagram of the two-dimensional direct-drive tracking mechanism based on quantum communication of the present invention is shown in FIG. Figure 2 ;

[0020] Figure 3 It is a structural schematic diagram of the support frame and the pitch mechanism in the present invention;

[0021] Figure 4 It is a structural schematic diagram of the orientation mechanism in the present invention;

[0022] Figure 5 The structure of the bearing assembly in the present invention is shown in FIG. Figure 1 ;

[0023] Figure 6 The structure of the bearing assembly in the present invention is shown in FIG. Figure 2 ;

[0024] Figure 7 It is a schematic diagram of the connection structure of the driving motor in the present invention;

[0025] Figure 8 It is a structural schematic diagram of the angle limiting mechanism in the present invention;

[0026] Fig. 9 It is a structural schematic diagram of the mechanical limiting mechanism in the present invention;

[0027] Fig.10 It is a structural schematic diagram of the photoelectric limiting mechanism in the present invention;

[0028] Among them: 1-azimuth mechanism, 2-support frame, 3-astronomical telescope tube, 4-pitch mechanism, 5-step shaft hole, 6-angle limit mechanism, 7-mechanical limit mechanism, 8-photoelectric limit mechanism, 9-bearing bracket, 10-hollow shaft, 11-angle measurement component, 12-wiring aviation plug, 13-cable fixing plate, 14-bottom plate, 15-machine base, 16-bearing end cover, 17-angular contact ball bearing, 18-outer spacer, 19-inner spacer, 20-bearing seat, 21-locking sleeve, 22-stator seat, 23-drive motor, 24-rotor seat, 25-gasket, 30-photoelectric sensor, 31-fan-shaped baffle, 32-spring plunger, 33-rotating block, 34-block pin, 35-V-shaped block, 36-pin shaft, 37-magnet, 38-light baffle. DETAILED DESCRIPTION

[0029] 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.

[0030] The purpose of the present invention is to provide a two-dimensional direct-drive tracking mechanism based on quantum communication to solve the problems existing in the prior art, significantly reduce the size and weight of the quantum communication ground station, and improve the maneuverability and work efficiency.

[0031] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] like Figures 1 to 10 As shown: This embodiment provides a two-dimensional direct-drive tracking mechanism based on quantum communication, including an azimuth mechanism 1, a support frame 2, a pitch mechanism 4 and a control unit. The lower end of the support frame 2 is connected to the azimuth mechanism 1, and the upper end is connected to the pitch mechanism 4. The pitch mechanism 4 is connected to the astronomical telescope tube 3. The azimuth mechanism 1 and the pitch mechanism 4 are electrically connected to the control unit respectively. The azimuth mechanism 1 can drive the support frame 2 to rotate in the horizontal plane, and the pitch mechanism 4 can drive the astronomical telescope tube 3 to rotate in the vertical plane. The support frame 2 is L-shaped and hollow inside. The azimuth mechanism 1 is arranged on the horizontal arm (located below the L-shape) of the support frame 2, and the pitch mechanism 4 is arranged on the top of the vertical arm. The astronomical telescope tube 3 is located above the horizontal arm.

[0033] The azimuth mechanism 1 or the pitch mechanism 4 includes a machine base 15, a drive motor 23, a rotating shaft, a bearing assembly and an angle measuring assembly 11. The machine base 15 is provided with a drive motor 23, a bearing assembly and an angle measuring assembly 11. A bearing assembly is respectively provided at both ends of the rotating shaft. The stator seat 22 of the drive motor 23 is connected to the machine base 15, and the rotor seat 24 is connected to the rotating shaft. The angle measuring assembly 11 is provided at the lower end of the rotating shaft, and bearing assemblies are provided between both ends of the rotating shaft and the machine base 15.

[0034] The rotating shaft is a hollow shaft 10, and a stepped shaft hole 5 is provided in the hollow shaft 10. The top of the hollow shaft 10 of the azimuth mechanism 1 is connected to a tooling connector for detection by bolts. The lower end of the base 15 is connected to a bearing assembly by bolts through the bearing bracket 9, and the upper port is connected to the bearing seat of another bearing assembly by bolts. The bottom of the base 15 is connected to the bottom plate 14 by bolts. The lower end of the base 15 of the azimuth mechanism 1 is provided with a cable fixing plate 13, and the side wall of the base 15 is provided with a wiring aviation plug 12.

[0035] The angle measuring assembly 11 includes an angle encoder, the stator of the angle encoder is connected to the bearing bracket 9 by bolts, and the rotor is connected to the rotating shaft by bolts. The drive motor 23 and the angle encoder are electrically connected to the control unit to implement closed-loop control, which is used to feedback the speed and position information in the current state, so as to facilitate real-time control of the horizontal angle of the astronomical telescope tube 3.

[0036] The bearing assembly includes a bearing end cover 16, an angular contact ball bearing 17, a spacer and a bearing seat 20. One or two angular contact ball bearings 17 are arranged between the bearing end cover 16 and the bearing seat 20. An inner spacer 19 and an outer spacer 18 are arranged between the two angular contact ball bearings 17. The lower end of the bearing seat 20 is threadedly connected to a locking sleeve 21. The bearing seat 20 is threadedly connected to the rotating shaft through the locking sleeve 21 or bolts. Among them, the bearing assembly at the lower end of the base 15 of the azimuth mechanism 1 includes two angular contact ball bearings 17.

[0037] An angle limiting mechanism 6 is arranged between the base 15 of the orientation mechanism 1 and the support frame 2, and the angle limiting mechanism 6 includes a stop pin 34, a V-shaped block 35, a pin shaft 36, a magnet 37 (strong magnet), a light shielding plate 38 and a photoelectric sensor 30. The stop pin 34 is arranged on the support frame 2, and the V-shaped block 35 is rotatably arranged on the side wall of the base 15 through the pin shaft 36. The stop pin 34 can touch the side wall of the V-shaped block 35. Magnets 37 and light shielding plates 38 are respectively arranged on the two side walls of the V-shaped block 35. The photoelectric sensor 30 is arranged on the base 15 and is located below the V-shaped block 35. During rotation, the magnet 37 can be adsorbed on the step surface of the base 15 and cause the light shielding plate 38 to trigger the photoelectric sensor 30. The photoelectric sensor 30 is electrically connected to the control unit. When the orientation mechanism 1 rotates, the rotation angle range of the angle limiting mechanism 6 is -360° to +360°. When the stop pin 34 rotates to the critical angle of -360° or +360° together with the support frame 2, it conflicts with the side wall of the V-shaped block 35, thereby triggering the photoelectric sensor 30, and then controlling the motor to stop rotating and change the rotation direction once through the control unit.

[0038] A pitch angle limiting mechanism is arranged between the rotating shaft of the pitch mechanism 4 and the support frame 2. The pitch angle limiting mechanism includes a mechanical limiting mechanism 7 and a photoelectric limiting mechanism 8 arranged at both ends of the rotating shaft. The mechanical limiting mechanism 7 includes a spring plunger 32 and a rotating block 33. Two spring plungers 32 with a set central angle are fixedly arranged on the bearing seat 20 of the bearing assembly. The rotating block 33 is connected to the hollow shaft 10. The rotating block 33 and the spring plunger 32 are in the same plane. The rotating block 33 can trigger the spring plunger 32. The photoelectric limiting mechanism 8 includes a fan-shaped baffle 31 and a photoelectric sensor 30. The fan-shaped baffle 31 is connected to the hollow shaft 10. The two photoelectric sensors 30 are arranged on the base 15 of the pitch mechanism 4 at a central angle of 180°. The fan-shaped baffle 31 can trigger the photoelectric sensor 30. The set central angle = 180°-the central angle of the fan-shaped baffle 31. When the pitch mechanism 4 rotates, the rotation angle range of the pitch angle limiting mechanism is -5° to +95°. When the astronomical telescope tube 3 rotates to a critical angle of -5° or +95°, the rotating block 33 conflicts with one of the spring plungers 32, and at the same time the fan-shaped baffle 31 triggers one of the photoelectric sensors 30. The control unit then controls the motor to stop rotating, and the spring plunger 32 is compressed to absorb energy and reduce mechanical vibration, thereby achieving a smooth rotation limit effect, with dual protection of mechanical limit and photoelectric limit.

[0039] The working principle of the two-dimensional direct-drive tracking mechanism based on quantum communication in this embodiment is that, in the initial state, the astronomical telescope tube 3 (load component) is in a horizontal zero position state, and the drive motor 23 in the azimuth mechanism 1 drives the stepped shaft hole 5 to rotate forward one circle and reverse one circle, and its rotation range is ±360°. The drive motor 23 in the pitch mechanism 4 drives the pitch axis to move back and forth, and its rotation range is -5° to +95°. The attitude position in the astronomical telescope tube 3 (load component) is determined by calculating the spatial position of the Mozi satellite by a computer, so as to achieve real-time tracking according to the motion trajectory of the Mozi satellite by controlling the azimuth mechanism 1 and the pitch mechanism 4 by a computer. The mechanism of this embodiment significantly reduces the size and weight of the ground station under the premise of realizing the connection between quantum communication ground and earth signals.

[0040] The present specification uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A two-dimensional direct-drive tracking mechanism based on quantum communication, characterized in that: It comprises an azimuth mechanism, a support frame, a pitch mechanism and a control unit, wherein the lower end of the support frame is connected to the azimuth mechanism, the upper end is connected to the pitch mechanism, the pitch mechanism is connected to the astronomical telescope tube, the azimuth mechanism and the pitch mechanism are electrically connected to the control unit respectively, the azimuth mechanism can drive the support frame to rotate in a horizontal plane, and the pitch mechanism can drive the astronomical telescope tube to rotate in a vertical plane; The azimuth mechanism or the pitch mechanism comprises a machine base, a driving motor, a rotating shaft, a bearing assembly and an angle measuring assembly. The machine base is provided with a driving motor, the bearing assembly and the angle measuring assembly. The two ends of the rotating shaft are respectively provided with a bearing assembly. The stator seat of the driving motor is connected to the machine base, and the rotor seat is connected to the rotating shaft. The angle measuring assembly is provided at the lower end of the rotating shaft, and the bearing assembly is provided between the two ends of the rotating shaft and the machine base. The rotating shaft is a hollow shaft, and a stepped shaft hole is provided in the hollow shaft. The top of the hollow shaft of the azimuth mechanism is connected with a tooling connector for detection by bolts. An angle limiting mechanism is arranged between the base of the orientation mechanism and the support frame, and the angle limiting mechanism includes a stop pin, a V-shaped block, a pin shaft, a magnet, a light shielding sheet and a photoelectric sensor. The stop pin is arranged on the support frame, and the V-shaped block is rotatably arranged on the side wall of the base through the pin shaft. The stop pin can touch the side wall of the V-shaped block, and the magnet and the light shielding sheet are respectively arranged on the two side walls of the V-shaped block. The photoelectric sensor is arranged on the base and is located below the V-shaped block. During rotation, the magnet can be adsorbed on the step surface of the base and cause the light shielding sheet to trigger the photoelectric sensor, and the photoelectric sensor is electrically connected to the control unit.

2. The two-dimensional direct-drive tracking mechanism based on quantum communication according to claim 1, characterized in that: The support frame is L-shaped and hollow inside. The azimuth mechanism is arranged on the horizontal arm of the support frame, and the pitch mechanism is arranged on the top of the vertical arm. The astronomical telescope tube is located above the horizontal arm.

3. The two-dimensional direct-drive tracking mechanism based on quantum communication according to claim 1, characterized in that: The lower end of the machine base is connected to one of the bearing components by bolts through a bearing bracket, and the upper port is connected to the bearing seat of another bearing component by bolts. The bottom of the machine base is connected to a base plate by bolts, a cable fixing plate is provided at the lower end of the machine base, and a wiring aviation plug is provided on the side wall of the machine base.

4. The two-dimensional direct-drive tracking mechanism based on quantum communication according to claim 3 is characterized in that: The angle measuring assembly comprises an angle encoder, a stator of the angle encoder is connected to the bearing bracket via bolts, a rotor is connected to the rotating shaft via bolts, and the drive motor and the angle encoder are both electrically connected to the control unit.

5. The two-dimensional direct-drive tracking mechanism based on quantum communication according to claim 1, characterized in that: The bearing assembly includes a bearing end cover, an angular contact ball bearing, a spacer and a bearing seat. One or two angular contact ball bearings are arranged between the bearing end cover and the bearing seat. An inner spacer and an outer spacer are arranged between the two angular contact ball bearings. The bearing seat is threadedly connected to the rotating shaft through a locking sleeve or bolts.

6. The two-dimensional direct-drive tracking mechanism based on quantum communication according to claim 1, characterized in that: A pitch angle limiting mechanism is arranged between the rotating shaft of the pitch mechanism and the supporting frame, the pitch angle limiting mechanism comprises a mechanical limiting mechanism and a photoelectric limiting mechanism arranged at both ends of the rotating shaft, the mechanical limiting mechanism comprises a spring plunger and a rotating block, two spring plungers with a set central angle are fixedly arranged on the bearing seat of the bearing assembly, the rotating block is connected to the rotating shaft, the rotating block and the spring plunger are in the same plane, and the rotating block can trigger the spring plunger; the photoelectric limiting mechanism comprises a fan-shaped baffle and a photoelectric sensor, the fan-shaped baffle is connected to the rotating shaft, the two photoelectric sensors are arranged on the base of the pitch mechanism with a central angle of 180°, the fan-shaped baffle can trigger the photoelectric sensor, and the set central angle=180°-the central angle of the fan-shaped baffle.

7. The two-dimensional direct-drive tracking mechanism based on quantum communication according to claim 6 is characterized in that: When the pitch mechanism rotates, the rotation angle range of the pitch angle limiting mechanism is -5° to +95°; when the azimuth mechanism rotates, the rotation angle range of the rotation angle limiting mechanism is -360° to +360°.

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