Integrated equatorial telescope and telescope pole alignment method

Abstract

The integrated equatorial telescope comprises the integrated equatorial telescope with a multi-rotating-shaft structure, the right ascension angle is adjusted through a first rotating shaft, the declination angle is adjusted through a second rotating shaft, the azimuth angle is adjusted through a third rotating shaft, the pitch angle is adjusted through a fourth rotating shaft, and system balance is adjusted in combination with a balance part. Meanwhile, the invention provides a full-automatic pole alignment method based on the telescope. The north pole or the south pole can be accurately positioned, and synchronous correction of coordinates is achieved. According to the invention, the effects of improving the operation convenience of the telescope, improving the antipode precision and stability and optimizing the balance performance are achieved.

Description

Technical Field

[0001] The present application relates to the field of astronomical telescopes, and in particular to an integrated equatorial telescope. Background Art

[0002] An equatorial telescope is an observation device designed based on the celestial equatorial coordinate system. Its core structural features are aligned with the Earth's rotation axis and are used to track the diurnal apparent motion of celestial bodies with high precision.

[0003] The key feature of an equatorial telescope is that one of its transmission shafts is parallel to the Earth's rotational axis. This axis, called the right ascension axis, or polar axis, ensures that stars within the telescope's field of view do not rotate relative to each other. Furthermore, the telescope has no blind spot at the zenith, where observation conditions are optimal. Therefore, the equatorial telescope structure is widely used in astronomical telescopes.

[0004] For example, the patent describes an astronomical telescope. The main technical principle is that it includes a lens barrel, a polar axis, a connecting portion, a column, and a base. The base and column are connected by bolts, and the column is connected to the connecting portion. The connecting portion includes a first connecting portion and a second connecting portion that are perpendicular to each other. The polar axis is rotatably connected to the lens barrel. The angle between the axis of the second connecting portion and the vertical plane is 150 to 170 degrees. A counterweight is detachably provided at the lower end of the polar axis. Astronomical telescopes are large and heavy. By arranging the lens barrel, polar axis, connecting portion, column, and base in a detachable connection, installation and disassembly are facilitated. The rotation angles of the lens barrel and polar axis are adjusted using a worm gear, resulting in high control precision, a large transmission ratio, relatively smooth operation, low noise, a compact structure, and self-locking properties. The angle between the axis of the second connecting portion and the vertical plane, i.e., the angle of the polar axis, can be adjusted by adjusting the angle between the second connecting portion and the column. This angle varies depending on the longitude and latitude of each location.

[0005] The above invention has certain limitations in terms of precise alignment and automatic adjustment, especially in the polar axis and coordinate synchronization process, which usually require manual intervention.

[0006] Equatorial telescopes typically require a counterweight to balance the telescope's payload. Therefore, the position of the counterweight on the counterweight rod must be manually adjusted to accommodate varying telescope loads. The inclusion of the counterweight also increases the overall weight of the system, making it less portable and difficult to carry for field observations. Summary of the Invention

[0007] In order to solve the above problems, the present application provides an integrated equatorial telescope and an automated pole alignment method, which has a self-balancing function and eliminates the need for a heavy hammer for balancing.

[0008] In the first aspect, the present application provides an integrated equatorial telescope adopting the following technical solutions: An integrated equatorial telescope, comprising: lens barrel; base; A supporting structure is provided between the lens barrel and the base, and is used to adjust the lens barrel, comprising a first rotating shaft, a second rotating shaft, a third rotating shaft, and a fourth rotating shaft, wherein the first rotating shaft adjusts the right ascension angle of the lens barrel so that the lens barrel rotates along the right ascension direction; the second rotating shaft is provided perpendicular to the first rotating shaft and is located on the side of the lens barrel, and the second rotating shaft adjusts the declination angle of the lens barrel and drives the lens barrel to move up and down along the declination direction; the third rotating shaft is located above the base, is provided vertically, is rotatably connected to the base, and controls the lens barrel to rotate in the horizontal direction so as to adjust the azimuth angle of the lens barrel; the fourth rotating shaft is located above the third rotating shaft and is provided perpendicular to the third rotating shaft, and adjusts the pitch angle of the lens barrel; The support structure further includes a balance member, which adjusts the balance of the entire telescope system.

[0009] By adopting the above technical solution, the right ascension, declination, azimuth and pitch of the lens barrel can be adjusted through the first, second, third and fourth rotating axes of the supporting structure. It can cover more directions of motion and easily make precise adjustments in multiple dimensions, enabling rapid alignment and tracking of celestial objects at different positions and angles, while also reducing tracking errors. The presence of the counterbalance ensures that the telescope remains balanced during movement or adjustment, thereby improving observation stability and accuracy. It also reduces the torque required by each axis during movement, thereby lowering energy consumption, reducing mechanical wear, and improving system stability. Especially at different angles, balancing the counterbalance prevents vibration of the telescope barrel due to center of gravity offset. Furthermore, integrating multiple axes into a single support structure makes the overall structure more compact, reducing volume and weight, and facilitating installation and transportation.

[0010] Preferably, the balancing member includes a balancing arm and a fifth rotating shaft arranged on the balancing arm, one end of the balancing arm is rotatably connected to the fourth rotating shaft, and the other end is provided with a fifth rotating shaft, and the fifth rotating shaft is connected to the first rotating shaft through a connecting member. The balancing member adjusts the angle between the balancing arm and the horizontal plane through the fourth rotating shaft, and adjusts the first rotating shaft, the second rotating shaft and the angle between the overall structure of the lens barrel and the balancing arm through the fifth rotating shaft to adjust the center of gravity of the supporting structure and the lens barrel.

[0011] By employing this technical solution, the combination of a balance arm and a fifth axis allows for flexible adjustment of the center of gravity of the telescope's support structure and tube, maintaining the system's balance in various postures. By adjusting the angle between the balance arm and the horizontal plane, and the angle between each component and the balance arm via the fifth axis, center-of-gravity shifts caused by changes in the telescope's posture can be effectively offset, thereby improving stability during observation. Simply adjusting the angles of a few axes allows the telescope system to be easily balanced, eliminating the need for complex calculations and tedious adjustments. Maintaining the telescope's balance not only improves observation quality but also reduces vibration and wear caused by imbalance, extending its service life.

[0012] Preferably, a battery compartment is provided inside the balancing arm, and a battery is provided in the battery compartment.

[0013] By adopting the above technical solution, a battery compartment is set on the inner side of the balance arm, which can power the entire system and avoid carrying an additional external power supply. It is suitable for field shooting. At the same time, the weight of the battery is used to increase the overall torque on one side of the balance arm to balance it with the telescope on the other side.

[0014] Preferably, the telescope further includes an automatic polar alignment system, comprising an imaging camera disposed at the bottom of the lens barrel, a control unit disposed parallel to the imaging camera, and a first drive unit disposed on the first, second, third, and fourth rotating shafts, the control unit being electrically connected to the imaging camera and the first drive unit. By employing the above technical solution, during use, the imaging camera is first positioned at the zero position of the declination axis, which is substantially aligned with the right ascension axis. A starry sky photograph is captured, and the camera's processor performs image analysis and data processing on the photograph to obtain precise equatorial coordinates, which are then converted to horizontal coordinates. The current altitude and azimuth angles are obtained, and the difference from the current geographic location's north or south pole is calculated. The control unit then controls the first drive unit to rotate the third and fourth rotating shafts. Precise polar alignment is achieved by rotating the first rotating shaft multiple times and photographing the image. This allows for rapid and accurate calibration, significantly improving observation efficiency. Manual polar alignment can be affected by the observer's experience and skill level. The automatic polar alignment system effectively reduces errors introduced by human factors through precise algorithms and sensor data. The electrical connection between the imaging camera and the control unit enables the system to acquire and analyze information from the image in real time, then automatically adjust the position of the lens barrel. Astronomical observations often require nighttime observations. The automatic polar alignment system allows observers to easily complete alignment even in poor lighting conditions, greatly facilitating nighttime observations.

[0015] Preferably, the first driving member includes a driving motor and a reduction mechanism, and the reduction mechanism is connected to the rotating shaft.

[0016] By adopting the above technical solution, the driving motor provides a stable power source for the rotating shaft, while the reduction mechanism ensures that the rotation speed of the rotating shaft can be precisely controlled. The reduction mechanism not only reduces the rotation speed of the rotating shaft, but also increases the torque, making the movement of the rotating shaft smoother and more controllable, further improving the stability of the telescope and enhancing the observation effect.

[0017] Preferably, the fifth rotating shaft and the fourth rotating shaft are configured as a worm gear structure.

[0018] By adopting the above technical solution, the fifth rotating shaft and the fourth rotating shaft are arranged at both ends of the balance arm, and the fifth rotating shaft and the fourth rotating shaft are set to a worm gear structure with a self-locking function. During the process of polar axis alignment, etc., they are not in a balanced state all the time. During the worm gear transmission process, due to its special meshing method, the transmission is smoother, vibration and noise are reduced, the balance of the telescope is maintained, and the observation effect is improved.

[0019] Preferably, the fifth rotating shaft is adjusted manually and / or electrically.

[0020] By adopting the above technical solution, the fifth axis can be adjusted manually and / or electrically. In remote observation locations without power supply, the manually adjusted fifth axis can still work normally, ensuring the versatility and reliability of the telescope.

[0021] Preferably, the fifth rotating shaft is driven by a second driving member, and the second driving member is electrically connected to the control member.

[0022] By adopting the above technical solution, the fifth rotating shaft can be automatically controlled by the control member through the connection mode of driving by the driving member and electrically connected to the control member, thereby improving the convenience and accuracy of operation.

[0023] In a second aspect, a telescope alignment method is applied to the integrated equatorial telescope of the first aspect, comprising the following steps: The control member controls the second rotating shaft to adjust the lens barrel to a zero position, and makes the lens barrel point parallel to the rotation axis direction of the first rotating shaft; The control component controls the fourth rotating shaft to adjust the lens barrel to an altitude angle of the local geographic latitude; The control component controls the third rotating shaft to adjust the azimuth to the north and / or the south; The imaging camera takes a photo of the starry sky, and the control unit analyzes the photo and calculates the precise equatorial coordinates of the photo; The third and fourth axes are fine-tuned after calculation by the control unit, ultimately achieving fully automatic and precise alignment of the telescope with the North Pole or South Pole.

[0024] By employing the above technical solution, this method achieves fully automated and precise telescope alignment, reducing manual intervention and operational complexity. Users only need to operate the control unit to complete the epipolar alignment process, improving ease of use and efficiency. During the alignment process, the control unit fine-tunes the third and fourth axes based on analyzed starry sky photos, enabling intelligent alignment optimization. This intelligent adjustment further improves alignment accuracy and stability, ensuring the telescope is in optimal observation condition.

[0025] Preferably, after the polar alignment action is performed, the automatic polar axis system is used for analytical synchronization, at which point the control unit controls the second rotating shaft to leave the zero position and take a new photo; By analyzing the photo, the current precise equatorial coordinates are obtained and used as the equatorial coordinates of the current system, ensuring that the system coordinates are completely synchronized with the actual pointing direction.

[0026] By employing this technical solution, the controller de-aligns the second axis and captures a new image, effectively performing a dynamic calibration. This allows the system to maintain high-precision alignment despite changing environmental conditions (such as minor deviations caused by the Earth's rotation and temperature fluctuations), effectively overcoming the timeliness issues that can arise with static calibration. The entire synchronization process is automated, eliminating the need for complex manual operations or adjustments. This not only simplifies the operational process and reduces user complexity, but also significantly improves adjustment efficiency.

[0027] In summary, this application includes at least one of the following beneficial technical effects: 1. Through the coordinated cooperation of four motorized shafts, combined with imaging cameras and control components, the telescope can achieve fully automatic and precise alignment with the North Pole or South Pole, significantly reducing manual intervention and improving the automation and ease of use of the telescope. 2. The balance arm and fifth axis allow for flexible adjustment of the telescope system's center of gravity, ensuring stable balance in various postures. This effectively prevents observation errors and equipment damage caused by uneven weight distribution, while also eliminating the need for a heavy weight and reducing system weight. A battery compartment within the balance arm also integrates the power supply into the telescope, eliminating the need for an additional power supply and reducing system complexity.

[0028] 3. The auto-polar alignment system supports parsing synchronization. After completing the polar alignment, the system coordinates can be updated by taking another photo. This ensures that the internal coordinate system is always consistent with the actual pointing direction, further improving observation accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic structural diagram of an integrated equatorial telescope of the present application.

[0030] Explanation of the accompanying drawings: 1. Lens barrel; 2. Base; 3. Support structure; 31. First rotating shaft; 32. Second rotating shaft; 33. Third rotating shaft; 34. Fourth rotating shaft; 35. Balance member; 351. Balance arm; 352. Fifth rotating shaft; 3521. Connecting member; 36. U-shaped mounting bracket; 4. Automatic polar axis system; 41. Control member; 42. First driving member; 421. Driving motor; 422. Speed reduction mechanism; 43. Imaging camera; 45. Second driving member. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1 This application is described in further detail.

[0032] The embodiment of the present application discloses an integrated equatorial telescope. Figure 1 The integrated equatorial telescope includes a lens barrel 1, a base 2 and a support structure 3, wherein the support structure 3 includes a first rotation axis 31, a second rotation axis 32, a third rotation axis 33, a fourth rotation axis 34, and a balance member 35.

[0033] Specifically, the first rotation shaft 31 is located at the rear end of the lens barrel 1 near the bottom, and its rotation axis is parallel to the Earth's rotation axis. It is used to adjust the right ascension angle of the lens barrel 1 so that the lens barrel 1 can rotate along the right ascension direction to align with celestial bodies of different right ascensions. The second rotating shaft 32 is arranged perpendicular to the first rotating shaft 31. Specifically, a U-shaped mounting bracket 36 is fixedly provided on the output shaft of the first rotating shaft 31. The U-shaped mounting bracket 36 is arranged on both sides of the lens barrel 1 and is rotatably connected to the lens barrel 1 through the second rotating shaft 32. It is mainly used to adjust the declination angle of the lens barrel 1 and drive the lens barrel 1 to move up and down along the declination direction. The third rotating shaft 33 is in the form of a longer vertical column, located slightly above the center of the base 2 and with both ends respectively embedded in the top plane of the base 2 and rotatably connected thereto. It is responsible for controlling the horizontal rotation of the lens barrel 1 and adjusting the azimuth angle; the base 2 is configured as a triangular bracket, and the legs of the bracket are retractable.

[0034] The fourth rotating shaft 34 is installed near the top of the third rotating shaft 33 and intersects with it at an angle of 90 degrees. After being fixed, it is used to adjust the pitch angle of the lens barrel 1.

[0035] The balancing member 35 includes a retractable balancing arm 351 and a fifth rotating shaft 352. One end of the balancing arm 351 is rotatably connected to the fourth rotating shaft 34, and the other end is provided with a fifth rotating shaft 352. The fifth rotating shaft 352 is connected to the first rotating shaft 31 via a connector 3521 fixedly connected to the rotating shaft. The fifth rotating shaft 352 and the fourth rotating shaft 34 are configured as a worm gear structure. Specifically, the fifth rotating shaft 352 and the fourth rotating shaft 34 are configured as worm gears, each connected to the balancing arm 351 via a worm gear. When the fifth rotating shaft 352 and / or the fourth rotating shaft 34 are externally driven to rotate, the worm gear rotates, and the balancing arm 351 rotates. The fifth rotating shaft 352 and the fourth rotating shaft 34 are arranged at both ends of the balance arm. The fifth rotating shaft 352 and the fourth rotating shaft 34 are set to a worm gear structure with a self-locking function. During the polar axis and other processes, they are not in a balanced state all the time. During the worm gear transmission process, due to its special meshing method, the transmission is smoother, vibration and noise are reduced, the balance of the telescope is maintained, and the observation effect is improved.

[0036] A battery compartment is provided on the inner side of the balance arm 351, and a battery is installed inside the battery compartment to power the entire system, avoiding the need to carry an additional external power supply. It is suitable for field shooting. At the same time, the weight of the battery is used to increase the overall torque on one side of the balance arm so as to balance with the telescope on the other side.

[0037] The connecting member 3521 is L-shaped, with one side fixedly connected to the fifth rotating shaft 352 and the other side fixed to the position of the first rotating shaft 31. The angle between the balance arm 351 and the horizontal plane can be adjusted via the fourth rotating shaft 34. By rotating the fifth rotating shaft 352, the angle between the first rotating shaft 31, the second rotating shaft 32, and the entire structure of the lens barrel 1, and the balance arm 351 can be adjusted, thereby calibrating the support structure and the center position of the lens barrel 1. To accommodate different load conditions, the balance arm 351 is configured as a telescopic member, allowing its length to be adjusted within a certain range. The specific length adjustment method is the same as that used in the prior art.

[0038] The fifth axis 352 is manually and / or electrically driven. Manual and / or electrically adjustable, the manually adjusted fifth axis 352 can still function properly in remote observation locations without power, ensuring the telescope's versatility and reliability.

[0039] The automatic polar alignment axis system 4 includes a control member 41 , a first driving member 42 for controlling the first to fourth rotating shafts 34 , a second driving member 45 for controlling the fifth rotating shaft 352 , and an imaging camera 43 located on the lens barrel 1 .

[0040] Specifically, the control member 41 is arranged in parallel with the imaging camera 43. The control member 41 is electrically connected to the first drive member 42, the second drive member 45, and the imaging camera 43. The imaging camera 43 takes a photo of the starry sky and performs image analysis and data processing on the photo through the control member 41 to obtain precise equatorial coordinates. The control member 41 then controls the first drive member 42 to drive the rotating shaft to rotate, achieving precise polar alignment. This allows the calibration process to be completed quickly and accurately, greatly improving observation efficiency. When manually aligning the polar axis, the observer's experience and skill level may affect the accuracy of the calibration. The automatic polar alignment system 4, however, effectively reduces errors introduced by human factors through precise algorithms. The electrical connection between the imaging camera 43 and the control member 41 enables the system to obtain and analyze information in the photo in real time, and then automatically adjust the position of the lens barrel 1. Astronomical observations often need to be conducted at night. The existence of the automatic polar alignment system 4 allows observers to easily complete the calibration work even in poor lighting conditions, bringing great convenience to nighttime observations.

[0041] The first driving member 42 includes a driving motor 421 and a reduction mechanism 422. The implementation principle of the integrated equatorial telescope in the embodiment of the present application is as follows: by comprehensively optimizing the design of each rotating shaft and its associated components, a tightly coordinated overall solution is formed, successfully solving the automation deficiencies of traditional equatorial mounts.

[0042] This application also includes a telescope alignment method, comprising the following steps: In the first step, the control component 41 first controls the second rotating shaft 32 to adjust the lens barrel 1 to the zero position, and makes the direction of the lens barrel 1 parallel to the rotation axis direction of the first rotating shaft 31 .

[0043] The zero position refers to the position where the axis of the lens barrel 1 coincides with the axis of the first rotating shaft 31 .

[0044] In the second step, the control member 41 is again used to command the fourth rotating shaft 34 to be raised or lowered to an altitude angle that matches the local geographical latitude.

[0045] In the third step, the control member 41 is used to act on the third rotating shaft 33 to adjust the azimuth angle to the north or south.

[0046] In the fourth step, after completing the preliminary preparation activities, the imaging camera 43 starts working - capturing an image of the night sky and then sending it to the control unit 41 for detailed interpretation to obtain the exact equatorial coordinates on the image and convert them into horizontal coordinates.

[0047] The fifth step is to guide the key pillars to make appropriate corrections based on the previously calculated deviations until the gaps are completely eliminated. This completes the entire process without any human involvement to complete the mission of pointing to the North Pole.

[0048] After completing the basic positioning task, a further step is required: "analysis synchronization." At this point, the control element 41 sends a signal to the second rotating shaft 32, causing it to slightly deviate from its original zero position. A new image is then captured, and a similar recognition algorithm is used to confirm the current sky coordinates. This updated record is then saved to ensure that all subsequent actions are based on the latest and most accurate data.

[0049] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. An integrated equatorial telescope, characterized by: include: Lens tube (1); Base (2); A support structure (3) is provided between the lens barrel (1) and the base (2) for adjusting the lens barrel (1), and comprises a first rotating shaft (31), a second rotating shaft (32), a third rotating shaft (33), and a fourth rotating shaft (34). The first rotating shaft (31) adjusts the right ascension angle of the lens barrel (1) so that the lens barrel (1) rotates along the right ascension direction; the second rotating shaft (32) is perpendicular to the first rotating shaft (31) and is located on the side of the lens barrel (1). The second rotating shaft (32) adjusts the declination angle of the lens barrel (1) and drives the lens barrel (1) to move up and down along the declination direction; the third rotating shaft (33) is located above the base (2), is vertically arranged, is rotatably connected to the base (2), and controls the lens barrel (1) to rotate in the horizontal direction and adjust the azimuth angle of the lens barrel (1); the fourth rotating shaft (34) is located above the third rotating shaft (33) and is vertically arranged with the third rotating shaft (33) and adjusts the pitch angle of the lens barrel (1); The support structure (3) further comprises a balancing member (35), and the balancing member (35) adjusts the balance of the entire telescope system.

2. The integrated equatorial telescope according to claim 1, characterized in that: The balancing member (35) includes a balancing arm (351) and a fifth rotating shaft (352) arranged on the balancing arm (351). One end of the balancing arm (351) is rotatably connected to the fourth rotating shaft (34), and the other end is provided with a fifth rotating shaft (352). The fifth rotating shaft (352) is connected to the first rotating shaft (31) via a connecting member (3521). The angle between the balancing arm (351) and the horizontal plane is adjusted via the fourth rotating shaft (34), and the angle between the first rotating shaft (31), the second rotating shaft (32), and the entire structure of the lens barrel (1) and the balancing arm (351) is adjusted via the fifth rotating shaft (352), thereby adjusting the center of gravity of the support structure (3) and the lens barrel (1).

3. The integrated equatorial telescope according to claim 2, characterized in that: A battery compartment is provided inside the balancing arm (351), and a battery is provided in the battery compartment.

4. The integrated equatorial telescope according to claim 1, characterized in that: The invention also includes an automatic polar alignment axis system (4), wherein the automatic polar alignment axis system (4) includes an imaging camera (43) arranged at the bottom of the lens barrel (1), a control member arranged in parallel with the imaging camera, and a first driving member (42) arranged on the first rotating shaft (31), the second rotating shaft (32), the third rotating shaft (33) and the fourth rotating shaft (34), and the control member is electrically connected to the imaging camera (43) and the first driving member (42).

5. The integrated equatorial telescope according to claim 4, characterized in that: The first driving member (42) includes a driving motor (421) and a speed reduction mechanism (422), and the speed reduction mechanism (422) is connected to the rotating shaft.

6. The integrated equatorial telescope according to claim 5, characterized in that: The fifth rotating shaft (352) and the fourth rotating shaft (34) are configured as a worm gear structure.

7. The integrated equatorial telescope according to claim 2, characterized in that: The fifth rotating shaft (352) is adjusted manually and / or electrically.

8. The integrated equatorial telescope according to claims 2-4, characterized in that: The fifth rotating shaft (352) is driven by a second driving member (45), and the second driving member (45) is electrically connected to the control member (41).

9. A telescope epipolar alignment method, using the integrated equatorial telescope according to any one of claims 1 to 8, characterized in that: The following steps are involved: The control member (41) controls the second rotating shaft (32) to adjust the lens barrel (1) to a zero position, and makes the direction of the lens barrel (1) parallel to the rotation axis direction of the first rotating shaft (31); The imaging camera (43) takes a photo of the starry sky, analyzes the altitude angle and azimuth angle of the lens barrel (1), and calculates the altitude angle and azimuth angle deviation relative to the north pole or south pole of the starry sky; The control member (41) controls the fourth rotating shaft (34) to adjust the lens barrel (1) to an altitude angle of a local geographic latitude angle; The control member (41) controls the third rotating shaft (33) to adjust the azimuth to the north and / or the south; The imaging camera (43) rotates in conjunction with the rotation axis (31) to take three photos of the starry sky at different rotation angles. The photos are analyzed to obtain three coordinates on the spherical surface, and the spherical coordinates of the rotation axis are calculated. The deviation between the coordinates and the North Pole or the South Pole is calculated; The third rotating shaft (33) and the fourth rotating shaft (34) are fine-tuned after calculation by the control member (41), thereby finally achieving fully automatic and precise alignment of the telescope with the North Pole or the South Pole.

10. The telescope epipolar alignment method according to claim 9, characterized in that: After the polar alignment action is completed, the automatic polar alignment axis system (4) is used for analytical synchronization. At this time, the control member (41) controls the second rotating shaft (32) to leave the zero position and take a new photo. By analyzing the photo, the current precise equatorial coordinates are obtained and used as the equatorial coordinates of the current system, ensuring that the system coordinates are completely synchronized with the actual pointing direction.

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