Oscillating mirror type coarse tracking mechanism

Abstract

The invention discloses a swing mirror type coarse tracking mechanism which comprises a plane mirror and a connecting piece, and the plane mirror is rotatably installed on the connecting piece. And the angle adjusting mechanism comprises a pitch axis system and an azimuth axis system, the pitch axis system is installed on the connecting piece, the azimuth axis system is installed on the connecting piece, and the pitch axis system and the azimuth axis system can change the pitch angle and the horizontal angle of the plane mirror. Through the technical scheme provided by the invention, the invention has the advantages of compact design, reasonable weight distribution, high precision and high stability, and is suitable for occasions needing accurate angle control.

Description

Technical Field

[0001] The invention relates to the technical field of airborne laser communication, and in particular to a swing mirror type coarse tracking mechanism. Background Art

[0002] With the development of communication technology, traditional microwave communication methods can no longer meet the growing demand for high-speed data transmission. As an emerging communication technology, laser communication has gradually become a research hotspot due to its advantages such as high bandwidth, high directivity and high confidentiality. Especially on airborne platforms, the application prospects of laser communication technology are particularly broad.

[0003] At present, airborne laser communication is a type of laser communication. This communication method uses laser beams as information carriers to transmit information. Compared with traditional microwave communication, its advantages are large communication capacity, high transmission accuracy, strong confidentiality, small size and weight, etc.

[0004] The coarse tracking mechanism is the core component for realizing the scanning-capture-tracking function in laser communication, and usually works in conjunction with the fine tracking mechanism. For airborne laser communication application scenarios, the coarse tracking mechanism can be divided into the optoelectronic pod type and the super-hemispherical cover type. The optoelectronic pod type usually adopts a two-dimensional turntable structure with a theodolite configuration. This type of coarse tracking mechanism is limited by the structural form and usually needs to load most or even all of the optical loads in the spherical cabin, which generally makes the size and weight larger; the super-hemispherical cover type usually contains a transparent super-hemispherical sealed cover to accommodate the coarse tracking mechanism. This type of structure is relatively flexible and can load a small part of the optical load, while most of the optical load is arranged in the cabin. The super-hemispherical cover type coarse tracking mechanism can be specifically divided into the swing mirror type and the Kude optical path type according to the different optical loads. The swing mirror type coarse tracking mechanism has great advantages in size and weight because it only needs to load one reflector.

[0005] The realization of airborne laser communication places high demands on the adaptability of the coarse tracking mechanism to the external environment and the airborne platform. The environmental adaptability includes the adaptability to external disturbances and the adaptability to a wide temperature range; the platform adaptability requires the coarse tracking mechanism to have a more compact size and smaller rotation space occupation. Summary of the invention

[0006] One advantage of the present invention is that it provides an oscillating mirror type coarse tracking mechanism, an airborne laser communication system with a smaller size, higher environmental adaptability and higher precision alignment capability, so as to meet the effect of the growing demand for high-speed data transmission.

[0007] To achieve at least one of the above advantages of the present invention, the present invention provides a swing mirror type coarse tracking mechanism, comprising a plane reflector; a connecting member, on which the plane reflector is rotatably mounted; and An angle adjustment mechanism includes a pitch axis system and an azimuth axis system, wherein the pitch axis system is installed on the connecting member, and the azimuth axis system is installed on the connecting member, and the pitch axis system and the azimuth axis system can change the pitch angle and the horizontal angle of the plane reflector.

[0008] Through the above technical solution, the swing mirror type coarse tracking mechanism includes a plane reflector, a connecting piece and an angle adjustment mechanism, and the angle adjustment mechanism includes a pitch axis system and an azimuth axis system for adjusting the pitch and horizontal angle of the reflector. This layout scheme has the smallest rotation size and reasonable weight distribution.

[0009] According to one embodiment of the present invention, the connecting member includes a first connecting frame, a second connecting frame, two support blocks and a mounting block, wherein the first connecting frame and the second connecting frame are respectively connected to the two support blocks, the mounting block is installed at one end of the two support blocks away from the first connecting frame and the second connecting frame, and the cross-section of the connecting member is U-shaped.

[0010] Through the above technical solution, the connecting member is composed of a first connecting frame, a second connecting frame, two supporting blocks and a mounting block, the supporting block connects the two connecting frames, and the mounting block is located at one end away from the two connecting frames, so that the cross section of the connecting member is U-shaped, providing a sufficient light aperture for the plane reflector.

[0011] According to one embodiment of the present invention, the pitch axis system includes a pitch motor, a pitch encoder, an encoder end mounting assembly and a motor end mounting assembly, wherein the encoder end mounting assembly is mounted on the first connecting frame, the pitch encoder is mounted on the encoder end mounting assembly, the motor end mounting assembly is mounted on the second connecting frame, and the pitch motor is mounted on the motor end mounting assembly.

[0012] Through the above technical solution, the pitch motor, pitch encoder, encoder end mounting assembly and motor end mounting assembly are respectively installed on the first connecting frame and the second connecting frame, so that the setting has high integration and reasonable weight distribution.

[0013] According to one embodiment of the present invention, the encoder end mounting assembly includes a pitch encoder shaft, a pitch encoder bearing seat, a pitch encoder bearing and a pitch encoder bearing pressure ring, wherein the pitch encoder bearing seat is installed on the first connecting frame, the pitch encoder shaft is installed on the pitch encoder bearing seat, the pitch encoder bearing is sleeved on the pitch encoder shaft, and the pitch encoder pressure ring is sleeved on the pitch encoder shaft and connected to the pitch encoder bearing.

[0014] Through the above technical solution, the encoder end mounting assembly includes a rotating shaft, a bearing seat, a bearing and a pressure ring. The bearing seat is installed on the first connecting frame, the bearing and the pressure ring are connected to the rotating shaft, and the encoder end mounting assembly can drive the encoder to rotate.

[0015] According to one embodiment of the present invention, the encoder mounting assembly also includes a pitch encoder mounting seat and a pitch encoder protective cover, wherein the pitch encoder mounting seat is installed on the pitch encoder rotating shaft and the pitch encoder, and the pitch encoder mounting seat is installed on a side away from the first connecting frame, and the pitch encoder protective cover is installed on a side of the pitch encoder bearing seat away from the first connecting frame.

[0016] Through the above technical solution, the encoder end also includes a mounting seat and a protective cover, which are installed on the side away from the first connecting frame to provide protection.

[0017] According to an embodiment of the present invention, the encoder mounting assembly further includes a pitch encoder counterweight, and the encoder counterweight is mounted on the encoder protective cover.

[0018] Through the above technical solution, the encoder installation assembly also includes a counterweight block installed on the protective cover for balancing and enabling the pitch encoder end to obtain the smallest axial dimension.

[0019] According to one embodiment of the present invention, the motor-end mounting assembly includes a pitch motor bearing seat, a pitch motor shaft, a pitch motor mounting seat, a pitch motor bearing, a pitch motor rotor pressure ring and a pitch motor stator pressure cover, wherein the pitch motor bearing seat is mounted on the second connecting frame, the pitch motor shaft is mounted on the pitch motor bearing seat, the pitch motor bearing is sleeved on the pitch motor shaft, and the pitch motor shaft is fixedly connected to the pitch motor mounting seat, the pitch motor is sleeved on the pitch motor shaft, the pitch motor rotor pressure ring is mounted on the pitch motor mounting seat, the pitch motor stator pressure cover is mounted on the pitch motor bearing seat, and the inner side of the pitch motor stator pressure cover abuts against the pitch motor and the pitch motor rotor pressure ring.

[0020] Through the above technical solution, the motor end mounting assembly includes a pitch motor bearing seat, a pitch motor shaft, a pitch motor mounting seat, a pitch motor bearing, a pitch motor rotor pressure ring and a pitch motor stator pressure cover, which are installed on the second connecting frame, and the pitch motor bearing and the pitch motor pressure cover are connected to the pitch motor shaft. The series arrangement is adopted so that the pitch axis encoder end has the smallest height dimension.

[0021] According to an embodiment of the present invention, the motor end mounting assembly further includes a limit block, and the limit block is mounted on the pitch motor mounting seat.

[0022] Through the above technical solution, the motor end mounting assembly also includes a limit block installed on the motor mounting seat to limit the rotation angle.

[0023] According to an embodiment of the present invention, a swing assembly is included, and the swing assembly is installed between the first connecting frame and the second connecting frame.

[0024] The above technical solution includes a reflector connector, a gyroscope and a pitch crankshaft, which are installed between two connecting frames and are used to adjust the angle of the reflector.

[0025] According to one embodiment of the present invention, the swing assembly includes a reflector connecting member, a gyroscope and a pitch crankshaft, wherein the pitch crankshaft is rotatably mounted on the first connecting frame and the second connecting frame, the gyroscope is mounted on the pitch crankshaft, the plane reflector is mounted on the pitch crankshaft, and the reflector connecting member is mounted between the plane reflector and the pitch crankshaft.

[0026] Through the above technical solution, the pitch crankshaft is rotatably mounted on the connecting frame, the gyroscope and the reflector connecting piece are mounted on the crankshaft, and the reflector is mounted on the connecting piece. When the output shaft of the pitch motor rotates, it can drive the pitch crankshaft to rotate relative to each other, thereby changing the pitch angle of the plane reflector. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 The overall structural schematic diagram of the swing mirror type coarse tracking mechanism of the present invention is shown.

[0028] Figure 2 A schematic structural diagram of the swing mirror type coarse tracking mechanism of the present invention in one state is shown.

[0029] Figure 3 The figure shows a front view structural schematic diagram of the swing mirror type coarse tracking mechanism of the present invention.

[0030] Figure 4 A partial structural exploded schematic diagram of the swing mirror type coarse tracking mechanism of the present invention is shown.

[0031] Figure 5 A partial cross-sectional view of the swing mirror type coarse tracking mechanism of the present invention is shown.

[0032] Figure 6 The schematic diagram of the structure of the connecting parts of the swing mirror type coarse tracking mechanism of the present invention is shown.

[0033] Figure 7 A structural schematic diagram showing another state of the connecting member of the swing mirror type coarse tracking mechanism of the present invention is shown.

[0034] Figure 8A partial cross-sectional view of the swing mirror type coarse tracking mechanism of the present invention is shown.

[0035] Fig. 9 A partial structural exploded schematic diagram of the swing mirror type coarse tracking mechanism of the present invention is shown.

[0036] Fig.10 A schematic diagram of the azimuth bearing seat through hole of the swing mirror type coarse tracking mechanism of the present invention is shown.

[0037] Description of reference numerals: 10. Plane reflector; 20. Connector; 21. First connecting frame; 22. Second connecting frame; 23. Support block; 24. Mounting block; 2401. Mounting space; 30. Angle adjustment mechanism; 31. Pitch axis system; 311. Pitch encoder; 312. Pitch motor; 313. Encoder end mounting assembly; 3131. Pitch encoder shaft; 3132. Pitch encoder bearing seat; 3133. Pitch encoder bearing; 3134. Pitch encoder bearing pressure ring; 3135. Pitch encoder mounting seat; 3136. Pitch encoder protective cover; 3137. Pitch encoder counterweight; 314. Motor end mounting assembly ;3141, pitch motor bearing seat;3142, pitch motor shaft;3143, pitch motor mounting seat;3144, pitch motor bearing;3145, pitch motor rotor pressure ring;3146, pitch motor stator pressure cover;3147, limit block;32, azimuth axis system;321, azimuth motor;322, azimuth encoder;323, azimuth mounting seat;324, azimuth bearing;325, azimuth bearing seat;32501, through hole;326, azimuth bearing pressure ring;327, azimuth motor pressure ring;40, swing assembly;41, reflector connector;42, gyroscope;43, pitch crankshaft;50, grating reading head. DETAILED DESCRIPTION

[0038] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles of the present invention defined in the following description can be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not deviate from the spirit and scope of the present invention.

[0039] Those skilled in the art should understand that, in the disclosure of the present invention, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0040] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0041] refer to Figures 1 to 10 A swing mirror type coarse tracking mechanism according to a preferred embodiment of the present invention will be described in detail below. The swing mirror type coarse tracking structure includes a plane reflector 10, a connecting member 20 and an angle adjustment mechanism 30, wherein the angle adjustment mechanism 30 includes a pitch axis system 31 and an azimuth axis system 32, the pitch axis system 31 and the azimuth axis system 32 are respectively installed at both ends of the connecting member 20, and the plane reflector 10 is rotatably installed on the pitch axis system 31. In other words, the pitch axis system 31 can drive the plane reflector 10 to move in the pitch direction to change the pitch angle of the plane reflector 10, and the azimuth axis system 32 can drive the pitch axis system 31 and the plane reflector 10 to rotate in the horizontal direction to change the horizontal angle of the plane reflector 10.

[0042] Specifically, the pitch axis system 31 includes a pitch encoder 311 and a pitch motor 312, wherein the pitch encoder 311 and the pitch motor 312 are respectively installed on both sides of the pitch axis system 31. In this way, the oscillating mirror type coarse tracking mechanism has the smallest rotation size and reasonable weight distribution.

[0043] Specifically, the connecting member 20 includes a first connecting frame 21, a second connecting frame 22, two support blocks 23 and a mounting block 24. The first connecting frame 21 and the second connecting frame 22 are respectively fixedly mounted on the two support blocks 23, the two support blocks 23 are mounted on the mounting block 24, and the mounting block 24 is mounted on the azimuth axis system 32.

[0044] That is to say, the connecting member 20 has a left supporting part and a right supporting part, the pitch encoder 311 is installed on the first connecting frame 21 of the left supporting part of the connecting member 20, and the pitch motor 312 is installed on the second connecting frame 22 of the right supporting part of the connecting member 20.

[0045] Furthermore, the longitudinal section of the support block 23 is triangular, and when the first connecting frame 21, the second connecting frame 22 and the support block 23 are connected, the cross section of the connecting member 20 is U-shaped, the first connecting frame 21 and the second connecting frame 22 are connected to the pitch axis system 31, and the mounting block 24 is mounted on the azimuth axis system 32. In this way, the connecting member 20 has a small weight, high stability, and reasonable weight distribution.

[0046] In this embodiment, the connecting member 20 adopts an integrated design to connect the pitch axis system 31 and the azimuth axis system 32. The relative accuracy of the pitch axis system 31 and the azimuth axis system 32 can be ensured by processing accuracy, and the connecting member 20 is a hollow structure to provide a sufficient light-transmitting aperture for the plane reflector 10. At the same time, the U-shape of the connecting member 20 adopts a special-shaped design, which forms a maze after being assembled with the azimuth axis system 32, thereby preventing foreign matter from entering, so that the azimuth axis of the coarse tracking mechanism has good reliability.

[0047] Specifically, the mounting block 24 has an installation space 2401, and the installation space 2401 forms the cross section of the mounting block 24 into an inverted U shape, so that when the mounting block 24 is connected to the azimuth axis system 32, it can be stable and prevent foreign matter from entering.

[0048] Specifically, the pitch axis system 31 also includes an encoder end mounting assembly 313, which is installed between the pitch encoder 311 and the first connecting frame 21. The encoder end mounting assembly 313 includes a pitch encoder shaft 3131, a pitch encoder bearing seat 3132, a pitch encoder bearing 3133 and a pitch encoder bearing pressure ring 3134, wherein the pitch encoder bearing seat 3132 is installed on the first connecting frame 21, the pitch encoder shaft 3131 is installed on the pitch encoder bearing seat 3132, the pitch encoder bearing 3133 is sleeved on the pitch encoder shaft 3131, and the pitch encoder bearing pressure ring 3134 is sleeved on the pitch encoder shaft 3131 and connected to the pitch encoder bearing 3133. That is to say, the pitch encoder 311 is sleeved on the pitch encoder rotating shaft 3131 , so that when the pitch encoder rotating shaft 3131 rotates, the pitch encoder 311 is driven to rotate.

[0049] It is worth mentioning that the encoder end mounting assembly 313 further includes a pitch encoder mounting seat 3135 and a pitch encoder protection cover 3136, wherein the pitch encoder mounting seat 3135 is mounted on the pitch encoder shaft 3131 and the pitch encoder 311, and the pitch encoder mounting seat 3135 is mounted on the side away from the first connecting frame 21, and the pitch encoder protection cover 3136 is mounted on the side of the pitch encoder bearing seat 3132 away from the first connecting frame 21. In this way, the pitch encoder 311 connection end has the smallest height dimension by adopting the serial arrangement.

[0050] Furthermore, the encoder end mounting assembly 313 also includes a pitch encoder counterweight 3137, which is installed on the side of the pitch encoder protective cover 3136 away from the first connecting frame 21, and the pitch encoder counterweight 3137 is connected to the pitch encoder rotating shaft 3131. This arrangement allows the pitch encoder 311 to be installed with the minimum axial dimension.

[0051] Furthermore, the pitch axis system 31 also includes a motor end mounting assembly 314, the motor end mounting assembly 314 is mounted on the second connecting frame 22 of the right support portion, the motor end mounting assembly 314 is mounted between the pitch motor 312 and the second connecting frame 22, the motor end mounting assembly 314 includes a pitch motor bearing seat 3141, a pitch motor shaft 3142, a pitch motor mounting seat 3143, a pitch motor bearing 3144, a pitch motor rotor pressure ring 3145 and a pitch motor stator pressure cover 3146, wherein the pitch motor bearing seat 3141 is mounted on the second connecting frame 22, the pitch motor The rotating shaft 3142 is installed on the pitch motor bearing seat 3141, the pitch motor bearing 3144 is sleeved on the pitch motor rotating shaft 3142, and the pitch motor rotating shaft 3142 is fixedly connected to the pitch motor mounting seat 3143, the pitch motor 312 is sleeved on the pitch motor rotating shaft 3142, the pitch motor rotor pressing ring 3145 is installed on the pitch motor mounting seat 3143, the pitch motor stator pressure cover 3146 is installed on the pitch motor bearing seat 3141, and the inner side of the pitch motor stator pressure cover 3146 abuts against the pitch motor 312 and the pitch motor rotor pressure ring 3145. In this way, the pitch motor connection end has the smallest height dimension by adopting the serial arrangement mode.

[0052] It is worth mentioning that the motor-end mounting assembly 314 also includes a limit block 3147, which is installed on the pitch motor mounting seat 3143. The limit block 3147 limits the rotation angle of the pitch motor shaft 3142 through the slot of the pitch motor stator cover 3146 to prevent continuous rotation from damaging the through-axis cable when the pitch direction rotates out of control.

[0053] Furthermore, the swing mirror type coarse tracking structure also includes a swing component 40 , which is installed between the plane reflector 10 and the first connecting frame 21 and the second connecting frame 22 , and is used to adjust the pitch angle of the plane reflector 10 .

[0054] Specifically, the swing assembly 40 includes a reflector connector 41, a gyroscope 42 and a pitch crankshaft 43, wherein the plane reflector 10 is mounted on the reflector connector 41, the reflector connector 41 is mounted on the pitch crankshaft 43, the gyroscope 42 is mounted on a side of the pitch crankshaft 43 away from the reflector connector 41, and both ends of the pitch crankshaft 43 are respectively connected to the pitch encoder shaft 3131 and the pitch motor shaft 3142. In this way, when the pitch encoder shaft 3131 and the pitch motor shaft 3142 rotate, the pitch crankshaft 43 is driven to rotate, thereby changing the pitch angle of the plane reflector 10.

[0055] Furthermore, the reflector connector 41 and the pitch crankshaft 43 are both made of low expansion coefficient materials and have similar expansion coefficients. When the temperature changes, the dimensional changes of these parts will be relatively consistent, thereby reducing the internal stress and structural deformation caused by uneven thermal expansion, and ensuring the optical performance in extremely high and low temperature environments in airborne usage scenarios.

[0056] Specifically, in this embodiment, the gyroscope 42 is installed on the top of the pitch crankshaft 43. In this way, the application of the gyroscope 42 enables the coarse tracking mechanism to adapt to the large-angle and high-frequency jitter during the flight of the airborne platform. The gyroscope 42 is arranged in the center to make the weight distribution most reasonable; at the same time, the gyroscope 42 is raised by installing a boss to reduce the influence of the temperature increase of the gyroscope 42 when it is working on the optical performance of the plane reflector 10.

[0057] Furthermore, the azimuth axis system 32 includes an azimuth motor 321, an azimuth encoder 322, an azimuth mounting seat 323, an azimuth bearing 324 and an azimuth bearing seat 325, wherein the azimuth bearing 324 is installed in the installation space 2401 of the mounting block 24, the azimuth bearing seat 325 is installed on the mounting block 24, the azimuth motor 321 is installed between the azimuth bearing seat 325 and the mounting block 24, the azimuth mounting seat 323 is connected to the mounting block 24, and the azimuth encoder 322 is installed on the azimuth mounting seat 323.

[0058] In this way, under the premise of ensuring the intermediate light aperture, the azimuth axis system 32 obtains the best balance of axial and radial dimensions, and a layout is adopted in which the azimuth motor 321 and the azimuth bearing 324 are connected in parallel along the radial direction and then in series with the azimuth encoder 322 along the axial direction.

[0059] It is worth mentioning that, in this embodiment, considering that the weight of the azimuth bearing 324 is more affected by the size than the azimuth motor 321 , the azimuth bearing 324 is arranged on the inner side and the azimuth motor 321 is arranged on the outer side.

[0060] Furthermore, the azimuth axis system 32 also includes a plurality of azimuth bearing pressure rings 326 and a plurality of azimuth motor pressure rings 327 . The azimuth bearing pressure rings 326 are installed on the azimuth bearing 324 , and the azimuth motor pressure rings 327 are installed on the azimuth motor 321 .

[0061] That is to say, the azimuth motor 321 has a relatively high rated torque, which can overcome the problem of increased starting torque in an airborne low-temperature environment and achieve good low-temperature adaptability. The stator and rotor of the azimuth motor 321 are respectively fixed to the azimuth bearing seat 325 and the connecting member 20, and are compressed by the azimuth motor pressing ring 327. The azimuth bearing seat 325 is connected to the connecting member 20 through the azimuth bearing 324, and the azimuth bearing 324 is compressed and fixed by the azimuth bearing pressing ring 326.

[0062] Specifically, the azimuth encoder 322 is fixed to the connector 20 via the azimuth mounting seat 323, wherein the code disk of the azimuth encoder 322 is reverse mounted to reduce the distance between the code disk scale centerline and the mounting surface, so that the azimuth encoder 322 occupies the minimum height space.

[0063] Furthermore, the azimuth bearing seat 325 is provided with a through hole 32501. In the present embodiment, when the operator needs to disassemble the azimuth motor 321, the operator can use a tool to lift the azimuth motor 321 from below through the through hole 32501, thereby improving the maintainability of the coarse tracking mechanism without increasing the size and weight of the structure.

[0064] It is worth mentioning that the pitch axis system 31 and the azimuth axis system 32 are both provided with a grating reading head 50, and the grating reading head 50 utilizes the interference and diffraction effects of light to convert the displacement into a digital signal output.

[0065] In summary, the design of this swing-mirror coarse tracking mechanism takes into account many factors such as accuracy, stability, weight distribution, temperature adaptability and maintainability, and is suitable for occasions that require precise angle adjustment, such as astronomical observation, military reconnaissance, etc.

[0066] It should be understood by those skilled in the art that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The advantages of the present invention have been fully and effectively achieved. The functional and structural principles of the present invention have been demonstrated and explained in the embodiments, and the embodiments of the present invention may be deformed or modified in any way without departing from the principles.

Claims

1. A swing mirror type coarse tracking mechanism, characterized in that: include: a plane reflector; a connecting member, the plane reflector being rotatably mounted on the connecting member; as well as An angle adjustment mechanism includes a pitch axis system and an azimuth axis system, wherein the pitch axis system is installed on the connecting member, and the azimuth axis system is installed on the connecting member, and the pitch axis system and the azimuth axis system can change the pitch angle and the horizontal angle of the plane reflector.

2. The oscillating mirror type coarse tracking mechanism according to claim 1, characterized in that: The connecting member includes a first connecting frame, a second connecting frame, two supporting blocks and a mounting block, wherein the first connecting frame and the second connecting frame are respectively connected to the two supporting blocks, the mounting block is installed at one end of the two supporting blocks away from the first connecting frame and the second connecting frame, and the cross-section of the connecting member is U-shaped.

3. The oscillating mirror type coarse tracking mechanism according to claim 2, characterized in that: The pitch axis system includes a pitch motor, a pitch encoder, an encoder end mounting assembly and a motor end mounting assembly, wherein the encoder end mounting assembly is mounted on the first connecting frame, the pitch encoder is mounted on the encoder end mounting assembly, the motor end mounting assembly is mounted on the second connecting frame, and the pitch motor is mounted on the motor end mounting assembly.

4. The oscillating mirror type coarse tracking mechanism according to claim 3, characterized in that: The encoder end mounting assembly includes a pitch encoder shaft, a pitch encoder bearing seat, a pitch encoder bearing and a pitch encoder bearing pressure ring, wherein the pitch encoder bearing seat is installed on the first connecting frame, the pitch encoder shaft is installed on the pitch encoder bearing seat, the pitch encoder bearing is sleeved on the pitch encoder shaft, and the pitch encoder pressure ring is sleeved on the pitch encoder shaft and connected to the pitch encoder bearing.

5. The oscillating mirror type coarse tracking mechanism according to claim 4, characterized in that: The encoder mounting assembly also includes a pitch encoder mounting seat and a pitch encoder protective cover, wherein the pitch encoder mounting seat is mounted on the pitch encoder rotating shaft and the pitch encoder, and the pitch encoder mounting seat is mounted on a side away from the first connecting frame, and the pitch encoder protective cover is mounted on a side of the pitch encoder bearing seat away from the first connecting frame.

6. The oscillating mirror type coarse tracking mechanism according to claim 4, characterized in that: The encoder mounting assembly also includes a pitch encoder counterweight, and the encoder counterweight is mounted on the encoder protective cover.

7. The oscillating mirror type coarse tracking mechanism according to claim 3, characterized in that: The motor end mounting assembly includes a pitch motor bearing seat, a pitch motor shaft, a pitch motor mounting seat, a pitch motor bearing, a pitch motor rotor pressure ring and a pitch motor stator pressure cover, wherein the pitch motor bearing seat is mounted on the second connecting frame, the pitch motor shaft is mounted on the pitch motor bearing seat, the pitch motor bearing is sleeved on the pitch motor shaft, and the pitch motor shaft is fixedly connected to the pitch motor mounting seat, the pitch motor is sleeved on the pitch motor shaft, the pitch motor rotor pressure ring is mounted on the pitch motor mounting seat, the pitch motor stator pressure cover is mounted on the pitch motor bearing seat, and the inner side of the pitch motor stator pressure cover abuts against the pitch motor and the pitch motor rotor pressure ring.

8. The oscillating mirror type coarse tracking mechanism according to claim 7, characterized in that: The motor end mounting assembly further includes a limit block, and the limit block is mounted on the pitch motor mounting seat.

9. The oscillating mirror type coarse tracking mechanism according to claim 2, characterized in that: A swing assembly is included, and the swing assembly is installed between the first connecting frame and the second connecting frame.

10. The oscillating mirror type coarse tracking mechanism according to claim 9, characterized in that: The swing assembly includes a reflector connecting member, a gyroscope and a pitch crankshaft, wherein the pitch crankshaft is rotatably mounted on the first connecting frame and the second connecting frame, the gyroscope is mounted on the pitch crankshaft, the plane reflector is mounted on the pitch crankshaft, and the reflector connecting member is mounted between the plane reflector and the pitch crankshaft.

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