A pendulum mirror device for inter-satellite beam control

Abstract

The present invention discloses a pendulum mirror device for inter-satellite beam control, which includes a mounting frame, a mounting backplane, a rotating bracket, a first linear stepper motor and a second linear stepper motor, a tensioning mechanism, a locking mechanism and a zero position detection mechanism. The lower end of the rotating bracket is fixedly connected to the mounting backplane, and the upper end is rotatably connected to the middle of the lower end face of the mounting backplane. The first linear stepper motor and the second linear stepper motor are respectively used to drive the mounting backplane to swing in two mutually perpendicular directions. The tensioning mechanism is used to drive the mounting backplane to always press tightly against the top ends of the output shafts of the first linear stepper motor and the second linear stepper motor. The locking mechanism includes a locking element connected to the mounting backplane and a driving device that can drive the locking element to disconnect from the mounting backplane. The present invention has the advantages of low power consumption, small volume, light weight, high precision, strong anti-vibration and impact resistance, etc. It is a relatively unique mechanism form in the current field of space laser communication and is suitable for popularization and use.

Description

Technical Field

[0001] The present invention relates to the technical field of inter-satellite laser communication, and more specifically, to a pendulum mirror device for inter-satellite beam control. Background Art

[0002] In recent years, with the emergence of miniaturized, intelligent, and low-cost small satellites, the scale of space missions has developed from single satellites to formations, constellations, or even satellite constellations. These space mission systems composed of multiple satellites often require the coordinated work of each satellite to achieve their mission tasks, which places higher and higher requirements on laser communication payloads.

[0003] In the development process of inter-satellite laser communication payloads, periscope mechanisms are mostly used for inter-satellite laser pointing and tracking equipment. This mechanism has the problems of large volume and large mass, resulting in high power consumption, increasing the satellite launch cost and power consumption burden. When two satellites are initially pointed during link establishment, due to the large installation error of the periscope mechanism's shaft system and the low accuracy of the encoder, the pointing accuracy is not high, resulting in an increase in the scanning and acquisition time and an extension of the link establishment time. In addition, the shaft system of the periscope mechanism is relatively complex, resulting in poor anti-vibration and shock resistance. Therefore, the applicant has developed a pendulum mirror device for inter-satellite beam control applicable to the inter-satellite networking application of small satellites according to the actual inter-satellite link performance requirements of some low-earth orbit constellation systems. It is mainly characterized by low power consumption, small volume, light weight, high accuracy, and strong anti-vibration and shock resistance, and is a relatively unique mechanism form in the current field of space laser communication. Summary of the Invention

[0004] The purpose of the present invention is to provide a pendulum mirror device for inter-satellite beam control, which has the advantages of low power consumption, small volume, light weight, high accuracy, strong anti-vibration and shock resistance, etc., and is a relatively unique mechanism form in the current field of space laser communication.

[0005] The present invention is implemented as follows: A pendulum mirror device for inter-satellite beam control includes a mounting frame and a mounting backplane. The mounting frame is located below the mounting backplane. A reflecting mirror is mounted on the upper end face of the mounting backplane, and further includes:

[0006] A rotating bracket, the lower end of which is fixedly connected to the mounting backplane, and the upper end is rotatably connected to the middle of the lower end face of the mounting backplane;

[0007] A first linear stepper motor and a second linear stepper motor, both of which are mounted on the mounting backplane and are respectively used to drive the mounting backplane to swing in two mutually perpendicular directions;

[0008] A tensioning mechanism, the lower end of which is connected to the mounting frame, and the upper end is connected to the mounting backplane, and is used to drive the mounting backplane to always press tightly against the top ends of the output shafts of the first linear stepper motor and the second linear stepper motor;

[0009] A locking mechanism is installed on the installation frame and includes a locking element connected to the installation back plate and a driving device that can drive the locking element to disconnect from the installation back plate.

[0010] Optionally, the rotating bracket includes a support shaft, a compression spring, a threaded retaining ring, and a spherical plain bearing. The lower end of the support shaft is connected to the installation back plate. The spherical plain bearing is installed at the upper end of the support shaft and is connected to the middle position of the installation back plate. The threaded retaining ring is threadedly connected to the middle position of the installation back plate and is sleeved outside the spherical plain bearing. The compression spring is sleeved on the support shaft, with its lower end pressing against the installation frame and its upper end extending into the threaded retaining ring. A ring-shaped retaining ring is provided on the inner wall of the threaded retaining ring, and the upper end of the compression spring abuts against the ring-shaped retaining ring.

[0011] Optionally, the tensioning mechanism includes a first tension spring and a second tension spring. The first tension spring is arranged close to the first linear stepper motor, with its lower end connected to the installation frame and its upper end connected to the installation back plate. The second tension spring is arranged close to the second linear stepper motor, with its lower end connected to the installation frame and its upper end connected to the installation back plate.

[0012] Optionally, a ball support is provided at the top of the output shafts of the first linear stepper motor and the second stepper motor respectively. Two arc-shaped grooves that cooperate with the two ball supports respectively are provided on the lower end face of the installation back plate, and the ball supports are in close contact with the arc-shaped grooves.

[0013] Optionally, the driving device is an electromagnet. The locking element includes a locking shaft and a locking spring. The electromagnet is installed at the lower end of the installation frame. The locking shaft is the shaft of the electromagnet. When the electromagnet is energized, it can drive the locking shaft to move downward. A locking groove is provided on the lower end face of the installation back plate. The locking spring is sleeved on the locking shaft, and the locking spring can drive the locking shaft to insert upward into the locking groove.

[0014] Optionally, the locking mechanism further includes a mounting seat, a blocking pressure plate, and a microswitch. Both the mounting seat and the microswitch are installed on the installation frame. A compressed pressure plate spring connected to the blocking pressure plate is horizontally arranged in the mounting seat. The locking mechanism includes a locked state and an unlocked state. When the locking mechanism is in the locked state, the locking spring drives the locking shaft to insert into the locking groove, and the pressure plate spring drives the blocking pressure plate to press against the locking shaft. When the locking mechanism is in the unlocked state, the electromagnet is energized to drive the locking shaft to move downward out of the locking groove and move the locking shaft to below the blocking pressure plate. The pressure plate spring drives the blocking pressure plate to continue to move and trigger the microswitch. The microswitch is electrically connected to the electromagnet.

[0015] Optionally, the locking shaft includes a thin shaft portion and a thick shaft portion located at the upper end of the thin shaft portion. The locking spring is sleeved on the thin shaft portion of the locking shaft. The lower end of the locking spring is connected to the mounting frame, and the upper end abuts against the shoulder of the thick shaft portion. An arc-shaped groove adapted to the thick shaft portion of the locking shaft is provided at one end of the blocking pressure plate that abuts against the locking shaft. A blocking block is provided on the thick shaft portion of the locking shaft. When the locking mechanism is in the locked state, the pressure plate spring drives the blocking pressure plate to abut against the thick shaft portion of the locking shaft, and the locking spring drives the blocking block provided on the locking shaft to abut against the lower end surface of the blocking pressure plate.

[0016] Optionally, it further includes a zero position detection mechanism. There are two sets of the zero position detection mechanism, which are respectively connected to the first linear stepper motor and the second linear stepper motor, and are respectively used to determine whether the first linear stepper motor and the second linear stepper motor drive the mounting backplane to reach the corresponding zero positions.

[0017] Optionally, the zero position detection mechanism includes a first photoelectric switch, a second photoelectric switch, a first detected zero position member, and a second detected zero position member. Any one of the first photoelectric switch or the first detected zero position member is connected to the output shaft of the first linear stepper motor, and the other is mounted on the mounting frame. When the first photoelectric switch detects the first detected zero position member, the first linear stepper motor drives the mounting backplane to return to the zero position in the pitching direction. Any one of the second photoelectric switch or the second detected zero position member is connected to the output shaft of the second linear stepper motor, and the other is mounted on the mounting frame. When the second photoelectric switch detects the second detected zero position member, the second linear stepper motor drives the mounting backplane to return to the zero position in the azimuth direction.

[0018] Optionally, the first detected zero position member and the second detected zero position member are respectively connected to the output shafts of the first linear stepper motor and the second linear stepper motor. The first photoelectric switch and the second photoelectric switch are mounted on the mounting frame. The first detected zero position member and the second detected zero position member have the same structure, including a socket plate sleeved on the output shaft of the linear stepper motor. A detected rod that can be detected by the photoelectric switch is provided on one side of the socket plate close to the photoelectric switch.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The present invention has the advantages of low power consumption, small volume, light weight, high precision, strong anti-vibration and impact resistance, etc. It is a relatively unique mechanism form in the current field of space laser communication and is suitable for popularization and use.

[0020] 2. The present invention is provided with a zero position detection mechanism, which can determine whether the first linear stepper motor and the second linear stepper motor drive the mounting backplane to reach the corresponding zero positions, and has a reset and correction function. Description of the Drawings

[0021] Figure 1 is the front view of the embodiment of the present invention;

[0022] Figure 2 is the side view of the embodiment of the present invention;

[0023] Figure 3 is the structural schematic diagram of the rotating bracket of the embodiment of the present invention;

[0024] Figure 4 is the structural schematic diagram of the locking mechanism connected to the mounting frame in the embodiment of the present invention;

[0025] Figure 5 is the position schematic diagram of the zero position detection mechanism on the mounting frame in the embodiment of the present invention.

[0026] Reference numerals: 1, mounting frame; 2, first linear stepper motor; 3, second linear stepper motor; 4, electromagnet; 5, mounting back plate; 6, first tension spring; 7, second tension spring; 8, ball support; 9, arc groove; 10, locking shaft; 11, locking spring; 12, mounting seat; 13, blocking pressure plate; 14, microswitch; 15, blocking block; 16, support shaft; 17, compression spring; 18, threaded retaining ring; 19, spherical plain bearing; 20, first optoelectronic switch; 21, second optoelectronic switch; 22, first detected zero position part; 23, second detected zero position part; 24, electromagnet mounting bracket. Detailed implementation manners

[0027] In the present invention, unless otherwise clearly defined and limited, the terms "mount", "connect", "link", "fix" and other terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0028] The following will be further described with reference to the drawings and specific embodiments:

[0029] Embodiment 1

[0030] A single pendulum mirror device for inter-satellite beam control, such as Figure 1 , Figure 2 and Figure 3As shown in the figure, it includes an installation frame 1, a first linear stepper motor 2, a second linear stepper motor 3, an installation backplane 5, a rotating bracket, a tensioning mechanism, and a locking mechanism. The installation frame 1 is located below the installation backplane 5. The installation frame 1 is in the shape of an elliptical disc. A lens mounting bracket is provided on the upper end face of the installation backplane 5, and a reflecting mirror is pasted on the lens mounting bracket. Both the first linear stepper motor 2 and the second linear stepper motor 3 are aerospace-grade vacuum linear stepper motors, which can work normally in a vacuum environment of -60°C to 120°C. Both the first linear stepper motor 2 and the second linear stepper motor 3 are installed on the lower end face of the installation frame 1, and the output shafts of the first linear stepper motor 2 and the second linear stepper motor 3 both pass through the installation frame 1. The first linear stepper motor 2 and the second linear stepper motor 3 are respectively used to drive the installation backplane 5 to swing in two mutually perpendicular directions.

[0031] As Figure 3 shown, the tensioning mechanism includes a first tensioning spring 6 and a second tensioning spring 7. The first tensioning spring 6 is arranged close to the first linear stepper motor 2. Its lower end is connected to the installation frame 1, and its upper end is connected to the installation backplane 5. The first tensioning spring 6 can keep the installation backplane 5 always tightly attached to the top of the output shaft of the first linear stepper motor 2. The second tensioning spring 7 is arranged close to the second linear stepper motor 3. Its lower end is connected to the installation frame 1, and its upper end is connected to the installation backplane 5. The second tensioning spring 7 can keep the installation backplane 5 always tightly attached to the top of the output shaft of the second linear stepper motor 3. The first tensioning spring 6 and the second tensioning spring 7 together form the tensioning mechanism, which is used to drive the installation backplane 5 to always press tightly on the tops of the output shafts of the first linear stepper motor 2 and the second linear stepper motor 3. A ball support 8 is provided at the top of each of the output shafts of the first linear stepper motor 2 and the second linear stepper motor 3. Two arc-shaped grooves 9 that respectively cooperate with the two ball supports 8 are provided on the lower end face of the installation backplane 5. Under the action of the first tensioning spring 6 and the second tensioning spring 7, the two arc-shaped grooves 9 are respectively in close contact with the two ball supports 8, so as to effectively prevent the installation backplane 5 from shifting.

[0032] As Figure 2 shown, the rotating bracket includes a support shaft 16 and a spherical plain bearing 19. The lower end of the support shaft 16 is connected to the installation backplane 5 by bolts. The spherical plain bearing 19 is installed at the upper end of the support shaft 16, and the spherical plain bearing 19 is connected to the middle position of the installation backplane 5. Within a certain angular range, the installation backplane 5 can rotate freely on the spherical plain bearing 19.

[0033] As Figure 1 and Figure 4As shown, the locking mechanism includes an electromagnet 4, a locking spring 11, a mounting base 12, a blocking pressure plate 13 and a microswitch 14. The microswitch 14 is electrically connected to the electromagnet 4. At the lower end of the mounting frame 1, there is an electromagnet mounting bracket 24, and the electromagnet 4 is mounted on the electromagnet mounting bracket 24. The shaft of the electromagnet 4 is the locking shaft 10. When the electromagnet 4 is energized, it can drive the locking shaft 10 to move downward. The locking shaft 10 includes a thin shaft portion and a thick shaft portion located at the upper end of the thin shaft portion. The locking spring 11 is sleeved on the thin shaft portion of the locking shaft 10. The lower end of the locking spring 11 is connected to the mounting frame 1, and the upper end abuts against the shoulder of the thick shaft portion. On the lower end face of the mounting back plate 5, there is a locking groove, and the locking spring 11 can drive the locking shaft 10 to insert upward into the locking groove. Both the mounting base 12 and the microswitch 14 are mounted on the mounting frame 1. In the mounting base 12, there is a compressed pressure plate spring connected to the blocking pressure plate 13 horizontally. At the outer end of the blocking pressure plate 13 that abuts, there is an arc-shaped groove adapted to the thick shaft portion of the locking shaft 10, and a blocking block 15 is provided on the thick shaft portion of the locking shaft 10. The locking mechanism includes a locking state and an unlocking state. When the locking mechanism is in the locking state, the locking spring 11 drives the locking shaft 10 to insert into the locking groove, the pressure plate spring drives the blocking pressure plate 13 to abut against the thick shaft portion of the locking shaft 10, and the locking spring 11 drives the blocking block 15 provided on the locking shaft 10 to abut against the lower end face of the blocking pressure plate 13. At this time, the limiting function of the blocking pressure plate 13 on the locking shaft 10 can make the locking shaft 10 insert into the locking groove of the mounting back plate 5 without applying a force to the mounting back plate 5 under the action of the locking spring 11. Therefore, the setting positions of the blocking block 15 and the blocking pressure plate 13 need to be calculated strictly. When the locking mechanism is in the unlocking state, the electromagnet 4 is energized to drive the locking shaft 10 to move downward out of the locking groove, and the locking shaft 10 moves to below the blocking pressure plate 13. The pressure plate spring drives the blocking pressure plate 13 to continue to move to directly above the locking shaft 10 and touches the microswitch 14, causing the microswitch 14 to control the electromagnet 4 to cut off the power. The locking spring 11 drives the locking shaft 10 upward, making the locking shaft 10 abut against the lower end face of the blocking pressure plate 13. Due to the blocking effect of the blocking pressure plate 13, the locking shaft 10 will not insert into the locking groove of the mounting back plate 5 again.

[0034] Working principle of the present invention: During the rocket launch process, the locking mechanism is in the locked state, enabling the mounting backplane 5 to effectively resist the strong vibration generated during the payload launch process and the strong impact generated when the explosive bolt explodes. After the satellite enters the predetermined orbit, an electric current is applied to the electromagnet 4 to unlock the mounting backplane 5, allowing the first linear stepper motor 2 and the second linear stepper motor 3 to drive the mounting backplane 5 to swing in two mutually perpendicular directions to adjust the angle of the mirror mounted on the mounting backplane 5. Compared with the periscope mechanism, the present invention drives the mirror on the mounting backplane 5 through an aerospace-grade vacuum linear stepper motor, with high adjustment accuracy, high pointing accuracy, thereby shortening the scanning capture time and the link establishment time. Moreover, compared with the periscope mechanism, the present invention has a simple structure, small size and light weight, and also has the advantages of low power consumption, small size and light weight.

[0035] In summary, the present invention has the advantages of low power consumption, small size, light weight, high accuracy, strong anti-vibration and impact resistance, etc. It is a relatively unique mechanism form in the current field of space laser communication and is suitable for popularization and use.

[0036] Embodiment 2

[0037] An inter-satellite beam control single pendulum mirror device, as Figure 1 , Figure 2 , Figure 3 and Figure 5 shown, includes a mounting frame 1, a first linear stepper motor 2, a second linear stepper motor 3, a mounting backplane 5, a rotating bracket, a tensioning mechanism, a locking mechanism and a zero position detection mechanism. The mounting frame 1 is located below the mounting backplane 5. The mounting frame 1 is in the shape of an elliptical disk. A lens mounting bracket is provided on the upper end surface of the mounting backplane 5, and a mirror is pasted on the lens mounting bracket. Both the first linear stepper motor 2 and the second linear stepper motor 3 are selected as aerospace-grade vacuum linear stepper motors and can work normally in a vacuum environment of -60°C to 120°C. Both the first linear stepper motor 2 and the second linear stepper motor 3 are installed on the lower end surface of the mounting frame 1, and the output shafts of the first linear stepper motor 2 and the second linear stepper motor 3 both pass through the mounting frame 1. The first linear stepper motor 2 and the second linear stepper motor 3 are respectively used to drive the mounting backplane 5 to swing in two mutually perpendicular directions. The output shaft of the linear stepper motor refers to the shaft that can move linearly up and down. In addition to the output shaft that moves linearly up and down, the linear stepper motor also has a rotating shaft, and a threaded structure is provided on the rotating shaft. The output shaft is connected to the rotating shaft through a connecting piece, and the connecting piece is connected to the rotating shaft through a threaded hole. In order to prevent the connecting piece from rotating, a limiting structure should be provided. The limiting structure can be a light hole opened on the connecting piece and a light rod passing through this light hole.

[0038] As Figure 3As shown in the figure, the tensioning mechanism includes a first tension spring 6 and a second tension spring 7. The first tension spring 6 is arranged close to the first linear stepper motor 2. Its lower end is connected to the mounting frame 1, and its upper end is connected to the mounting backplane 5. The first tension spring 6 can keep the mounting backplane 5 always closely attached to the top end of the output shaft of the first linear stepper motor 2. The second tension spring 7 is arranged close to the second linear stepper motor 3. Its lower end is connected to the mounting frame 1, and its upper end is connected to the mounting backplane 5. The second tension spring 7 can keep the mounting backplane 5 always closely attached to the top end of the output shaft of the second linear stepper motor 3. The first tension spring 6 and the second tension spring 7 together form the tensioning mechanism, which is used to drive the mounting backplane 5 to always press tightly on the top ends of the output shafts of the first linear stepper motor 2 and the second linear stepper motor 3. A ball support 8 is provided at the top end of each of the output shafts of the first linear stepper motor 2 and the second linear stepper motor 3. Two arc-shaped grooves 9 respectively matching the two ball supports 8 are provided on the lower end surface of the mounting backplane 5. Under the action of the first tension spring 6 and the second tension spring 7, the two arc-shaped grooves 9 are in close contact with the two ball supports 8 respectively, so as to effectively prevent the mounting backplane 5 from shifting.

[0039] As Figure 2 shown in the figure, the rotating bracket includes a support shaft 16, a compression spring 17, a threaded retaining ring 18 and a spherical plain bearing 19. The lower end of the support shaft 16 is connected to the mounting backplane 5. The spherical plain bearing 19 is installed at the upper end of the support shaft 16, and the spherical plain bearing 19 is connected to the middle position of the mounting backplane 5. Within a certain angle range, the mounting backplane 5 can freely rotate on the spherical plain bearing 19. The threaded retaining ring 18 is threadedly connected to the middle position of the mounting backplane 5 and sleeved outside the spherical plain bearing 19. The compression spring 17 is sleeved on the support shaft 16. Its lower end presses tightly on the mounting frame 1, and its upper end extends into the threaded retaining ring 18. A ring-shaped retaining ring is provided on the inner wall of the threaded retaining ring 18, and the upper end of the compression spring 17 abuts against the ring-shaped retaining ring. The compression spring 17 has the function of stabilizing the mounting backplane 5, and when other forces acting on the mounting backplane 5 are eliminated, the compression spring 17 has the function of returning the mounting backplane 5 to the zero position.

[0040] As Figure 1 and Figure 4As shown, the locking mechanism includes an electromagnet 4, a locking spring 11, a mounting seat 12, a blocking pressure plate 13, and a microswitch 14. The microswitch 14 is electrically connected to the electromagnet 4. At the lower end of the mounting frame 1, there is an electromagnet mounting bracket 24. The electromagnet 4 is mounted on the electromagnet mounting bracket 24. The shaft of the electromagnet 4 is the locking shaft 10. When the electromagnet 4 is energized, it can drive the locking shaft 10 to move downward. The locking shaft 10 includes a thin shaft portion and a thick shaft portion located at the upper end of the thin shaft portion. The locking spring 11 is sleeved on the thin shaft portion of the locking shaft 10. The lower end of the locking spring 11 is connected to the mounting frame 1, and the upper end abuts against the shoulder of the thick shaft portion. On the lower end face of the mounting backplate 5, there is a locking groove. The locking spring 11 can drive the locking shaft 10 to insert upward into the locking groove. Both the mounting seat 12 and the microswitch 14 are mounted on the mounting frame 1. In the mounting seat 12, there is a compressed pressure plate spring connected to the blocking pressure plate 13 horizontally. At the outer end where the blocking pressure plate 13 abuts, there is an arc-shaped groove adapted to the thick shaft portion of the locking shaft 10. On the thick shaft portion of the locking shaft 10, there is a blocking block 15. The locking mechanism includes a locked state and an unlocked state. When the locking mechanism is in the locked state, the locking spring 11 drives the locking shaft 10 to insert into the locking groove. The pressure plate spring drives the blocking pressure plate 13 to abut against the thick shaft portion of the locking shaft 10. And the locking spring 11 drives the blocking block 15 provided on the locking shaft 10 to abut against the lower end face of the blocking pressure plate 13. At this time, the limiting function of the blocking pressure plate 13 on the locking shaft 10 can make the locking shaft 10 insert into the locking groove of the mounting backplate 5 without applying a force to the mounting backplate 5 under the action of the locking spring 11. Therefore, the setting positions of the blocking block 15 and the blocking pressure plate 13 need to be calculated strictly. When the locking mechanism is in the unlocked state, the electromagnet 4 is energized to drive the locking shaft 10 to move downward out of the locking groove, and the locking shaft 10 moves to below the blocking pressure plate 13. The pressure plate spring drives the blocking pressure plate 13 to continue moving to be directly above the locking shaft 10 and touches the microswitch 14, causing the microswitch 14 to control the electromagnet 4 to cut off the power. The locking spring 11 drives the locking shaft 10 upward, making the locking shaft 10 abut against the lower end face of the blocking pressure plate 13. Due to the blocking effect of the blocking pressure plate 13, the locking shaft 10 will not insert into the locking groove of the mounting backplate 5 again.

[0041] As Figure 1 and Figure 5As shown in the figure, the zero position detection mechanism includes a first optoelectronic switch 20, a second optoelectronic switch 21, a first detected zero position part 22, and a second detected zero position part 23. The first detected zero position part 22 and the second detected zero position part 23 are respectively connected to the output shafts of the first linear stepper motor 2 and the second linear stepper motor 3, and the first optoelectronic switch 20 and the second optoelectronic switch 21 are installed on the installation frame 1. The first detected zero position part 22 and the second detected zero position part 23 have the same structure, including a socket plate sleeved on the output shaft of the linear stepper motor, and a detected rod that can be detected by the optoelectronic switch is arranged on one side of the socket plate close to the optoelectronic switch. When the first optoelectronic switch 20 detects the first detected zero position part 22, the first linear stepper motor 2 drives the installation backplane 5 back to the zero position in the pitching direction. When the second optoelectronic switch 21 detects the second detected zero position part 23, the second linear stepper motor 3 drives the installation backplane 5 back to the zero position in the azimuth direction. Therefore, the zero position detection mechanism can determine whether the first linear stepper motor 2 and the second linear stepper motor 3 drive the installation backplane 5 to reach the corresponding zero positions, and has a reset and correction function.

[0042] The above is only the preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A pendulum mirror device for inter-satellite beam control, comprising a mounting frame (1) and a mounting backplate (5), the mounting frame (1) being located below the mounting backplate (5), and a reflecting mirror being mounted on the upper end face of the mounting backplate (5), characterized in that, It further includes: A rotating bracket, the lower end of the rotating bracket is fixedly connected to the mounting backboard (5), and the upper end is rotatably connected to the middle of the lower end face of the mounting backboard (5); A first linear stepper motor (2) and a second linear stepper motor (3), both are mounted on the mounting backboard (5), and are respectively used to drive the mounting backboard (5) to swing in two mutually perpendicular directions; A tensioning mechanism, the lower end is connected to the mounting frame (1), and the upper end is connected to the mounting backboard (5), and is used to drive the mounting backboard (5) to always press tightly against the top ends of the output shafts of the first linear stepper motor (2) and the second linear stepper motor (3); A locking mechanism, mounted on the mounting frame (1), includes a locking element connected to the mounting backboard (5), and a driving device that can drive the locking element to disconnect from the mounting backboard (5); The driving device is an electromagnet (4), the locking element includes a locking shaft (10) and a locking spring (11), the electromagnet (4) is mounted at the lower end of the mounting frame (1), the locking shaft (10) is the shaft of the electromagnet (4), and when the electromagnet (4) is energized, it can drive the locking shaft (10) to move downward; a locking groove is provided on the lower end face of the mounting backboard (5), the locking spring (11) is sleeved on the locking shaft (10), and the locking spring (11) can drive the locking shaft (10) to insert upward into the locking groove; The locking mechanism further includes a mounting seat (12), a blocking pressure plate (13) and a microswitch (14), the mounting seat (12) and the microswitch (14) are both mounted on the mounting frame (1), and a pressed pressure plate spring connected to the blocking pressure plate (13) is horizontally arranged in the mounting seat (12); the locking mechanism includes a locking state and an unlocking state. When the locking mechanism is in the locking state, the locking spring (11) drives the locking shaft (10) to insert into the locking groove, and the pressure plate spring drives the blocking pressure plate (13) to press against the locking shaft (10); when the locking mechanism is in the unlocking state, the electromagnet (4) is energized to drive the locking shaft (10) to move downward out of the locking groove, and the locking shaft (10) moves to below the blocking pressure plate (13), and the pressure plate spring drives the blocking pressure plate (13) to continue to move and touch the microswitch (14); the microswitch (14) is electrically connected to the electromagnet (4).

2. The pendulum mirror device for inter-satellite beam control according to claim 1, characterized in that The rotating bracket includes a support shaft (16), a compression spring (17), a threaded retaining ring (18) and a spherical plain bearing (19), the lower end of the support shaft (16) is connected to the mounting backboard (5), the spherical plain bearing (19) is mounted at the upper end of the support shaft (16), and the spherical plain bearing (19) is connected to the middle position of the mounting backboard (5); the threaded retaining ring (18) is threadedly connected to the middle position of the mounting backboard (5) and is sleeved outside the spherical plain bearing (19), the compression spring (17) is sleeved on the support shaft (16), its lower end is pressed against the mounting frame (1), and the upper end extends into the threaded retaining ring (18), and an annular retaining ring is provided on the inner wall of the threaded retaining ring (18), and the upper end of the compression spring (17) is pressed against the annular retaining ring.

3. The pendulum mirror device for inter-satellite beam control according to claim 1, characterized in that, The tensioning mechanism includes a first tension spring (6) and a second tension spring (7). The first tension spring (6) is arranged close to the first linear stepper motor (2), with its lower end connected to the mounting frame (1) and its upper end connected to the mounting backplate (5). The second tension spring (7) is arranged close to the second linear stepper motor (3), with its lower end connected to the mounting frame (1) and its upper end connected to the mounting backplate (5).

4. The single pendulum mirror device for inter-satellite beam control according to claim 3, characterized in that, At the top of the output shafts of the first linear stepper motor (2) and the second linear stepper motor (3), a ball support (8) is provided respectively. On the lower end face of the mounting backplate (5), two arc-shaped grooves (9) are provided which are respectively matched with the two ball supports (8), and the ball supports (8) are in close contact with the arc-shaped grooves (9).

5. The single pendulum mirror device for inter-satellite beam control according to claim 1, characterized in that The locking shaft (10) includes a thin shaft part and a thick shaft part located at the upper end of the thin shaft part. The locking spring (11) is sleeved on the thin shaft part of the locking shaft (10). The lower end of the locking spring (11) is connected to the mounting frame (1), and the upper end abuts against the shoulder of the thick shaft part. At one end where the blocking pressure plate (13) abuts against the locking shaft (10), an arc-shaped groove adapted to the thick shaft part of the locking shaft (10) is provided. A blocking block (15) is provided on the thick shaft part of the locking shaft (10). When the locking mechanism is in the locked state, the pressure plate spring drives the blocking pressure plate (13) to abut against the thick shaft part of the locking shaft (10), and the locking spring (11) drives the blocking block (15) provided on the locking shaft (10) to abut against the lower end face of the blocking pressure plate (13).

6. A pendulum mirror device for inter-satellite beam control according to any one of claims 1-5, characterized in that In addition, a zero position detection mechanism is further included. There are two groups of the zero position detection mechanism, which are respectively connected to the first linear stepper motor (2) and the second linear stepper motor (3), and are respectively used to determine whether the first linear stepper motor (2) and the second linear stepper motor (3) drive the mounting backplate (5) to reach the corresponding zero positions.

7. The single pendulum mirror device for inter-satellite beam control according to claim 6, characterized in that, The zero position detection mechanism includes a first photoelectric switch (20), a second photoelectric switch (21), a first detected zero position part (22) and a second detected zero position part (23). Any one of the first photoelectric switch (20) or the first detected zero position part (22) is connected to the output shaft of the first linear stepper motor (2), and the other is mounted on the mounting frame (1). When the first photoelectric switch (20) detects the first detected zero position part (22), the first linear stepper motor (2) drives the mounting backplate (5) to return to the zero position in the pitching direction. Any one of the second photoelectric switch (21) or the second detected zero position part (23) is connected to the output shaft of the second linear stepper motor (3), and the other is mounted on the mounting frame (1). When the second photoelectric switch (21) detects the second detected zero position part (23), the second linear stepper motor (3) drives the mounting backplate (5) to return to the zero position in the azimuth direction.

8. A pendulum mirror device for inter-satellite beam control according to claim 7, characterized in that, The first detected zero-position part (22) and the second detected zero-position part (23) are respectively connected to the output shafts of the first linear stepper motor (2) and the second linear stepper motor (3), and the first optical switch (20) and the second optical switch (21) are installed on the installation frame (1); the first detected zero-position part (22) and the second detected zero-position part (23) have the same structure, including a socket plate sleeved on the output shaft of the linear stepper motor, and a detected rod that can be detected by the optical switch is arranged on one side of the socket plate close to the optical switch.

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