A reference cable automatic positioning method based on a Beidou system

Abstract

The application provides a benchmark cable automatic positioning method based on a Beidou system, and comprises the following steps: providing equipment, installing a clamp disc, installing a driving positioning assembly and a prism assembly, debugging the equipment, adjusting the prism position, prism positioning, position re-measuring, and benchmark cable space positioning. The application avoids high-altitude operation and has higher measurement accuracy.

Description

[Technical Field]

[0001] This invention relates to the field of bridge construction technology, specifically to an automatic positioning method for reference cables based on the BeiDou system. [Background Technology]

[0002] Modern suspension bridges utilize high-strength steel wire as the primary tension structure in their main cables. This design features rational stress distribution, large span capacity, maximum material strength utilization, and economical cost, making it the ideal bridge type for crossing obstacles exceeding 1,000 meters in length. It is increasingly used in bridges spanning rivers and seas. Long-span suspension bridges typically employ gravity anchorages and often utilize prestressed anchorage systems. During construction, the installation accuracy of the reference cables within the anchorages is crucial to the bridge's stress distribution and safety after completion. Therefore, rapidly and accurately constructing the reference cables to ensure design requirements are met is a critical task in the field of suspension bridge construction.

[0003] The existing method for positioning the reference cable involves surveyors using a catwalk to reach a fixed observation point to measure its spatial position. The cable's alignment is then adjusted based on the measurement results, gradually bringing it closer to the design position until the deviation is within acceptable limits. This measurement process presents several problems: First, it involves working at heights, posing safety hazards; second, measuring the reference cable's position requires repeated operations, which is time-consuming and makes it difficult to guarantee high accuracy. Therefore, a device and measurement method that can solve these problems is needed. [Summary of the Invention]

[0004] The present invention aims to solve at least one of the technical problems mentioned above, and provides an automatic positioning method for reference cables based on the Beidou system, which avoids high-altitude operations and has higher measurement accuracy.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] An automatic positioning method based on the BeiDou system using a reference cable includes the following steps:

[0007] Equipment provided: A measuring instrument for the BeiDou measurement system and an automatic positioning device for a reference cable based on the BeiDou system are provided. The automatic positioning device for the reference cable based on the BeiDou system includes a clamping disk, a driving positioning component, and a prism component. The clamping disk has a clamping hole that fits the outer surface of the reference cable, and the axis of the clamping hole can coincide with the axis of the reference cable. The driving positioning component is connected to the periphery of the clamping disk and can move circumferentially along the clamping disk. The prism component is mounted on the driving positioning component, and the prism component includes a prism whose diameter is perpendicular to the axis of the clamping hole.

[0008] Mounting clamp plate: The clamp plate is clamped and mounted on the reference cable through the clamping hole;

[0009] Install the drive positioning component and install the prism component: Connect the drive positioning component to the fixture plate;

[0010] Debugging equipment: Test the drive positioning component to ensure that it can move circumferentially along the fixture disk and normally receive signals from the Beidou measurement system measuring instruments and signals controlling the operation of the drive positioning component;

[0011] Adjusting the prism position: the drive positioning component moves along the circumference of the clamping disk, and the drive positioning component drives the prism component to move along the circumference of the clamping disk to a first preset position;

[0012] Prism positioning: The Beidou measurement system measuring instrument obtains the specific position data of the prism from the driving positioning component and calculates the spatial position data of the reference cable at the first preset position;

[0013] Position remeasurement: Repeat the steps "adjust prism position" and "prism positioning" to complete the measurement of the prism at multiple different positions on the fixture plate, thereby completing the positioning of the reference cable at that position;

[0014] Spatial positioning of the reference cable: Repeat the above steps to achieve the positioning of the reference cable at different locations in space.

[0015] Furthermore, the clamping plate includes a circular plate and an outer limiting ring. The outer limiting ring is disposed around the periphery of the circular plate and is perpendicular to the circular plate. The driving positioning component is connected to the outer limiting ring and is capable of moving circumferentially along the outer limiting ring. The circular plate is provided with the clamping hole.

[0016] Furthermore, the circular plate includes a first semicircular plate and a second semicircular plate. An arc-shaped plate extends from the arc edge of the first semicircular plate. The arc-shaped plate is perpendicular to the first semicircular plate. A groove is recessed at the center of the first semicircular plate. The structure of the second semicircular plate is the same as that of the first semicircular plate, and the second semicircular plate is detachably connected to the first semicircular plate.

[0017] The step "Install the clamping plate" specifically includes the following steps:

[0018] S1. Engage the grooves of the first semicircular plate and the second semicircular plate on opposite sides of the reference cable;

[0019] S2. The first semicircular plate and the second semicircular plate are detachably connected by their diameter edges.

[0020] Furthermore, the diameter sides of the first semicircular plate and the second semicircular plate are detachably connected by bolts and nuts;

[0021] In step S2, the first semicircular plate and the second semicircular plate are connected by the bolt and the nut.

[0022] Further, the drive positioning assembly includes a guide gear, a moving gear, a drive positioning part, and a guide limiting clamp. The guide gear is disposed on the circular plate and has a through hole corresponding to the clamping hole, the axis of the through hole coinciding with the axis of the clamping hole. The moving gear meshes with the guide gear, and the moving gear extends a central limiting shaft towards the inner side of the outer ring limiting ring, allowing the moving gear to rotate relative to the central limiting shaft. The drive positioning part is installed on the side of the moving gear away from the central limiting shaft and drives the moving gear to rotate. The guide limiting clamp is disposed on the same side as the central limiting shaft, and has a snap-fit ​​groove on it. The outer ring limiting ring is detachably snapped into the snap-fit ​​groove. The central limiting shaft and the guide limiting clamp are fixed to the side facing the clamping hole. The prism assembly is mounted on the guide limiting clamp.

[0023] In the step "Installing the drive positioning component and the prism component", the specific method is as follows: make the moving gear mesh with the guide gear, and insert the outer ring limiting ring into the snap-fit ​​groove. At this time, the drive positioning component and the mounting prism component are both installed on the fixture plate.

[0024] In the step "adjusting the prism position", the specific method is as follows: the driving positioning unit drives the moving gear to rotate, the moving gear moves circumferentially along the guide gear, and the guide limiting clamp moves along the outer ring limiting ring under the drive of the moving gear, thereby driving the prism assembly to move circumferentially along the circular plate. When the prism reaches the first preset position, it stops.

[0025] Furthermore, the guide gear includes a first half gear and a second half gear. The first half gear and the second half gear are both recessed at their centers with matching grooves. The first half gear is connected to the first semicircular plate, and the second half gear is connected to the second semicircular plate. The matching groove of the first half gear is consistent with the groove of the first semicircular plate, and the matching groove of the second half gear is consistent with the groove of the second semicircular plate.

[0026] By adopting the above technical solution, the present invention has the following beneficial effects:

[0027] 1. In the above-mentioned automatic positioning method for reference cables based on the BeiDou system, the clamping disk is fixedly held onto the reference cable through clamping holes. When the positioning component moves circumferentially along the clamping disk, it causes the prism to move circumferentially along the same direction. Information about the prism's different positions on the clamping disk is obtained through the BeiDou system, thereby achieving the measurement and positioning of the reference cable's position. Because this invention combines the BeiDou system to measure the reference cable's position, it avoids high-altitude operations and offers higher accuracy compared to manual measurement.

[0028] 2. Since the prism assembly can move circumferentially along the circular plate under the drive of the driving and positioning unit, when the prism assembly is blocked by high-altitude objects at the construction site, the prism assembly can be moved to another position to obtain the specific position data of the prism. [Attached Image Description]

[0029] Figure 1 This is a schematic diagram of the automatic positioning device for reference cables based on the BeiDou system in this invention.

[0030] Figure 2 for Figure 1 A schematic diagram of the rear structure of the reference cable automatic positioning device based on the Beidou system.

[0031] Figure 3 This is a schematic diagram of the connection structure between the guide limit clamp and the moving gear.

[0032] In the attached diagram, 1-clamping disc, 10-circular plate, 11-outer ring limiting ring, 12-first semicircular plate, 121-arc plate, 122-groove, 123-connecting plate, 124-bolt, 13-second semicircular plate, 14-clamping hole, 2-drive positioning assembly, 21-guide gear, 211-first half gear, 212-second half gear, 213-adapter groove, 22-moving gear, 221-central limiting shaft, 23-drive positioning part, 24-guide limiting clamp, 241-snap groove, 3-prism assembly, 31-prism, 32-mounting rod, 33-prism frame, 100-reference cable.

Detailed Implementation Methods

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or it may be centered within another component. When a component is described as "set to" another component, it can be directly set on the other component or it may be centered within another component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this article are for illustrative purposes only.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0036] like Figures 1 to 3 As shown, a preferred embodiment of the present invention provides an automatic positioning device for a reference cable based on the Beidou system, which is used to measure and position the reference cable during construction.

[0037] An automatic positioning device for a reference cable based on the BeiDou Navigation Satellite System includes a clamping disk 1, a drive positioning assembly 2, and a prism assembly 3. The clamping disk 1 has a clamping hole 14 that fits the outer surface of the reference cable, and the axis of the clamping hole 14 can coincide with the axis of the reference cable. The drive positioning assembly 2 is connected to the periphery of the clamping disk 1 and can move circumferentially along the clamping disk 1. The prism assembly 3 is mounted on the drive positioning assembly 2 and includes a prism 31, the diameter of which is perpendicular to the axis of the clamping hole 14.

[0038] In use, the aforementioned automatic positioning device for the reference cable based on the BeiDou system fixes the clamping disk 1 onto the reference cable 100 through the clamping hole 14. When the driving positioning component 2 moves circumferentially along the clamping disk 1, it causes the prism 31 to move circumferentially along the clamping disk 1. Information about the different positions of the prism 31 on the clamping disk 1 is obtained through the BeiDou system, thereby achieving the measurement and positioning of the reference cable 100. Because this invention combines the BeiDou system to measure the position of the reference cable 100, high-altitude operations are avoided, and the accuracy is higher compared to manual measurement.

[0039] In this embodiment, the clamping disk 1 includes a circular plate 10 and an outer ring limiting ring 11. The outer ring limiting ring 11 is disposed around the periphery of the circular plate 10 and is perpendicular to the circular plate 10. The driving positioning component 2 is connected to the outer ring limiting ring 11 and can move along the circumference of the outer ring limiting ring 11. The circular plate 10 is provided with clamping holes 14.

[0040] In this embodiment, the circular plate 10 includes a first semicircular plate 12 and a second semicircular plate 13. An arc-shaped plate 121 extends from the arc edge of the first semicircular plate 12, and the arc-shaped plate 121 is perpendicular to the first semicircular plate 12. A groove 122 is recessed at the center of the first semicircular plate 12. The structure of the second semicircular plate 13 is the same as that of the first semicircular plate 12, and the second semicircular plate 13 is detachably connected to the first semicircular plate 12. Specifically, a connecting plate 123 is provided at the diameter edge of both the first semicircular plate 12 and the diameter edge of the second semicircular plate 13. The plane of the connecting plate 123 facing the other semicircular plate is flush with the diameter edge of the corresponding semicircular plate. Threaded holes are provided on the two connecting plates 123, and the two connecting plates 123 are detachably connected by bolts 124 and nuts. In detail, connecting plates 123 are provided on both sides of the groove 122. When it is necessary to fix the clamping disc 1 onto the reference cable 100, the grooves 122 of the first semicircular plate 12 and the second semicircular plate 13 are engaged on opposite sides of the reference cable 100, and the connecting plates 123 of the first semicircular plate 12 and the second semicircular plate 13 are in contact. After the bolts 124 are passed through the threaded holes of the two corresponding connecting plates 123, they are fixed with nuts. Then the circular plate 10 is fixedly clamped onto the reference cable 100. At this time, the grooves 122 of the first semicircular plate 12 and the second semicircular plate 13 form a clamping hole 14, and the arc plates 121 of the first semicircular plate 12 and the second semicircular plate 13 are spliced ​​together to form an outer ring limiting ring 11.

[0041] In this embodiment, the drive positioning component 2 includes a guide gear 21, a moving gear 22, a drive positioning part 23, and a guide limiting clamp 24. The guide gear 21 is mounted on the circular plate 10 and has a through hole corresponding to the clamping hole 14. The axis of the through hole coincides with the axis of the clamping hole 14. Specifically, the guide gear 21 and the arc plate 121 are located on the same side of the circular plate 10. The guide gear 21 includes a first half gear 211 and a second half gear 212. The center of both the first half gear 211 and the second half gear 212 is recessed with an adapter groove 213. The first half gear 211 is connected to the first semicircular plate 12, and the second half gear 212 is connected to the second semicircular plate 13. The adapter groove 213 of the first half gear 211 is consistent with the groove 122 of the first semicircular plate 12, and the adapter groove 213 of the second half gear 212 is consistent with the groove 122 of the second semicircular plate 13. When the circular plate 10 is fixedly clamped on the reference cable 100, the two adapter grooves 213 form a through hole, and the first half gear 211 and the second half gear 212 are spliced ​​to form a gear with continuous gear teeth.

[0042] The moving gear 22 meshes with the guide gear 21. A central limiting shaft 221 extends from the inner side of the outer limiting ring 11 of the moving gear 22. The moving gear 22 can rotate relative to the central limiting shaft 221. Specifically, a bearing is installed at the center of the moving gear 22. The outer ring of the bearing is fixed to the moving gear 22, and one end of the central limiting shaft 221 is fixed to the inner ring of the bearing. A drive positioning unit 23 is installed on the side of the moving gear 22 away from the central limiting shaft 221, and the drive positioning unit 23 drives the moving gear 22 to rotate. At this time, the moving gear 22 moves circumferentially along the guide gear 21. Specifically, the drive positioning unit 23 uses a servo motor, specifically a General Dynamics Inovance MS1 series servo driver motor combination servo system, model SV630NS2R8I. The drive positioning unit 23 is fixed to the outer ring of the bearing, and the drive positioning unit 23 drives the moving gear 22 to rotate about the central limiting shaft 221 via the bearing. The drive positioning unit 23 is also equipped with a sensor for receiving signals from the BeiDou measurement system and a drive module for driving the moving gear 22 to rotate. The sensor can interact with the BeiDou measurement system measuring instrument to achieve positioning of the reference cable 100. The sensor, drive module and BeiDou measurement system measuring instrument on the drive positioning unit 23 are all existing technologies. For example, the sensor is equipped with a module with GeoMoS software and the drive module is equipped with Location Tracking software, which are widely used in the field and will not be described in detail here.

[0043] The guide limiting clamp 24 is disposed on the same side as the central limiting shaft 221. A snap-fit ​​groove 241 is provided on the guide limiting clamp 24, and the outer limiting ring 11 is detachably snapped into the snap-fit ​​groove 241. The central limiting shaft 221 and the guide limiting clamp 24 are fixed to the side facing the clamping hole 14. The outer limiting ring 11 is clamped on the guide limiting clamp 24. During the circumferential movement of the moving gear 22 along the guide gear 21, the friction between the guide limiting clamp 24 and the outer limiting ring 11, due to the snap-fit ​​groove 241, allows the moving gear 22 to remain stationary relative to the outer limiting ring 11 when it is not rotating.

[0044] The prism assembly 3 is mounted on the guide limiting clamp 24. Specifically, the prism assembly 3 is existing technology and will only be briefly described here. The prism assembly 3 includes a mounting rod 32 and a prism frame 33. One end of the mounting rod 32 is fixedly connected to the side of the guide limiting clamp 24 away from the central limiting axis 221. The mounting rod 32 extends radially away from the guide limiting clamp 24 along the circular plate 10. The prism frame 33 is mounted on the end of the mounting rod 32 away from the guide limiting clamp 24. The prism 31 is mounted on the prism frame 33. The diameter of the cross-section of the central limiting axis 221 and the diameter of the prism 31 can be connected to form a straight line.

[0045] This embodiment also provides an automatic positioning method based on the BeiDou system, including the following steps:

[0046] Equipment provided: The BeiDou measurement system measuring instrument and the above-mentioned automatic positioning device for reference cable based on the BeiDou system are provided. The BeiDou measurement system measuring instrument is existing technology and is commonly used in this field, so it will not be described in detail here.

[0047] Mounting clamp plate 1: Clamp plate 1 is mounted on reference cable 100 through clamping hole 14, specifically including the following steps:

[0048] S1. Engage the grooves 122 of the first semicircular plate 12 and the second semicircular plate 13 on opposite sides of the reference cable 100;

[0049] S2. The first semicircular plate 12 and the second semicircular plate 13 are connected by bolts 124 and nuts. Specifically, after the bolts 124 are passed through the threaded holes of the two corresponding connecting plates 123, they are fixed with nuts, so that the guide gear 21 and the circular plate 10 are clamped on the reference cable 100.

[0050] Install the drive positioning component 2 and the prism component 3: Connect the drive positioning component 2 to the fixture plate 1, specifically including the following steps: make the moving gear 22 mesh with the guide gear 21, and insert the outer ring limiting ring 11 into the snap-fit ​​groove 241. At this time, the drive positioning component 2 and the mounting prism component 3 are both installed on the fixture plate 1.

[0051] Equipment debugging: Test the drive positioning component 2 to ensure that it can move circumferentially along the fixture disk 1 and normally receive signals from the Beidou measurement system measuring instruments and signals controlling the operation of the drive positioning component 2.

[0052] Adjusting the position of prism 31: The drive positioning component 2 moves along the circumference of the clamping disk 1, and the drive positioning component 2 drives the prism component 3 to move along the circumference of the clamping disk 1 to a first preset position. Specifically, the drive positioning part 23 drives the moving gear 22 to rotate, and the moving gear 22 moves along the circumference of the guide gear 21. The guide limiting clamp 24 moves along the outer ring limiting ring 11 under the drive of the moving gear 22, thereby driving the prism component 3 to move along the circumference of the circular plate 10. When the prism 31 reaches the first preset position, it stops.

[0053] Prism 31 positioning: The Beidou measurement system measuring instrument obtains the specific position data of prism 31 from the driving positioning component 2 and calculates the spatial position data of reference cable 100 at the first preset position. The Beidou measurement system measuring instrument combined with prism 31 to obtain the spatial position data of reference cable 100 is a common technical means in this field, and will not be elaborated here.

[0054] Position retest: Repeat the steps “adjust prism 31 position” and “prism 31 positioning” to complete the measurement of prism 31 at multiple different positions on the fixture plate 1, thereby completing the positioning of the reference cable 100 at that position.

[0055] Spatial positioning of reference cable 100: Repeat the above steps to achieve positioning of reference cable 100 at different locations in space.

[0056] After completing the spatial positioning of the reference cable 100, the obtained data is compared with the design data, and then the spatial alignment and orientation of the reference cable 100 are adjusted. The adjustment method is the same as the adjustment method in the prior art, and this embodiment does not involve the adjustment of the spatial alignment and orientation of the reference cable 100, so it will not be described in detail here.

[0057] The positioning of the reference cable 100 using the above method is more accurate than manual measurement. In addition, since the prism assembly 3 can move circumferentially along the circular plate 10 under the drive of the driving positioning unit 23, when the prism assembly 3 is blocked by high-altitude objects at the construction site, the prism assembly 3 can be moved to another position to obtain the specific position data of the prism 31.

[0058] The above description is a detailed description of the preferred embodiments of the present invention. However, the embodiments are not intended to limit the scope of the patent application of the present invention. All equivalent changes or modifications made under the technical spirit of the present invention should fall within the patent scope covered by the present invention.

Claims

1. An automatic positioning method for reference cables based on the BeiDou system, characterized in that, Includes the following steps: Provided equipment: Provides a Beidou measurement system measuring instrument and a Beidou-based automatic positioning device for a reference cable. The Beidou-based automatic positioning device for a reference cable includes a clamping disk (1), a driving positioning component (2), and a prism component (3). The clamping disk (1) has a clamping hole (14) that is adapted to the outer surface of the reference cable (100). The axis of the clamping hole (14) can coincide with the axis of the reference cable (100). The driving positioning component (2) is connected to the periphery of the clamping disk (1) and can move along the circumference of the clamping disk (1). The prism component (3) is mounted on the driving positioning component (2). The prism component (3) includes a prism (31). The diameter of the prism (31) is perpendicular to the axis of the clamping hole (14). Mounting clamp plate (1): The clamp plate (1) is clamped and mounted on the reference cable (100) through the clamping hole (14); Install the drive positioning component (2) and install the prism component (3): Connect the drive positioning component (2) to the clamping plate (1); Debugging equipment: Test the drive positioning component (2) to ensure that it can move circumferentially along the clamping disk (1) and normally receive the signals of the Beidou measurement system measuring instrument and the signals controlling the operation of the drive positioning component (2); Adjust the position of the prism (31): Move the drive positioning component (2) along the circumference of the clamping disk (1), and the drive positioning component (2) will drive the prism component (3) to move along the circumference of the clamping disk (1) to a first preset position. Prism (31) positioning: The Beidou measurement system measuring instrument obtains the specific position data of the prism (31) from the drive positioning component (2) and calculates the spatial position data of the reference cable (100) at the first preset position; Position retest: Repeat the steps "adjust prism (31) position" and "prism (31) positioning" to complete the measurement of the prism (31) at multiple different positions on the clamp plate (1), and then complete the positioning of the reference cable (100) at that position; Spatial positioning of reference cable (100): Repeat the above steps to achieve positioning of reference cable (100) at different locations in space; The clamping plate (1) includes a circular plate (10) and an outer ring limiting ring (11). The outer ring limiting ring (11) is disposed around the periphery of the circular plate (10) and is perpendicular to the circular plate (10). The driving positioning component (2) is connected to the outer ring limiting ring (11) and is capable of moving along the circumference of the outer ring limiting ring (11). The circular plate (10) is provided with the clamping hole (14). The circular plate (10) includes a first semicircular plate (12) and a second semicircular plate (13). An arc-shaped plate (121) extends from the arc edge of the first semicircular plate (12), and the arc-shaped plate (121) is perpendicular to the first semicircular plate (12). A groove (122) is recessed at the center of the first semicircular plate (12). The structure of the second semicircular plate (13) is the same as that of the first semicircular plate (12), and the second semicircular plate (13) is detachably connected to the first semicircular plate (12). The step "Installing the clamping plate (1)" specifically includes the following steps: S1. Engage the grooves (122) of the first semicircular plate (12) and the second semicircular plate (13) on opposite sides of the reference cable (100); S2. The diameter sides of the first semicircular plate (12) and the second semicircular plate (13) are detachably connected by bolts (124) and nuts; The drive positioning assembly (2) includes a guide gear (21), a moving gear (22), a drive positioning part (23), and a guide limiting clamp (24). The guide gear (21) is disposed on the circular plate (10) and has a through hole corresponding to the clamping hole (14). The axis of the through hole coincides with the axis of the clamping hole (14). The moving gear (22) meshes with the guide gear (21). The moving gear (22) extends a central limiting shaft (221) toward the inner side of the outer ring limiting ring (11). The moving gear (22) can rotate relative to the central limiting shaft (221). The drive positioning part (23) is installed on the side of the moving gear (22) away from the central limiting shaft (221), and the drive positioning part (23) drives the moving gear (22) to rotate; the guide limiting clamp (24) is arranged on the same side as the central limiting shaft (221), and the guide limiting clamp (24) is provided with a snap-fit ​​groove (241), and the outer ring limiting ring (11) is detachably snapped into the snap-fit ​​groove (241). The central limiting shaft (221) and the guide limiting clamp (24) are fixed on the side facing the clamping hole (14); the prism assembly (3) is installed on the guide limiting clamp (24); In the step "Installing the drive positioning component (2) and the prism component (3)", the specific method is as follows: make the moving gear (22) mesh with the guide gear (21), insert the outer ring limiting ring (11) into the snap-fit ​​groove (241), at this time the drive positioning component (2) and the mounting prism component (3) are both installed on the clamping plate (1); In the step "adjusting the position of the prism (31)", the specific method is as follows: the driving positioning part (23) drives the moving gear (22) to rotate, the moving gear (22) moves along the circumference of the guide gear (21), and the guide limiting clamp (24) moves along the outer ring limiting ring (11) under the drive of the moving gear (22), thereby driving the prism assembly (3) to move along the circumference of the circular plate (10). When the prism (31) reaches the first preset position, it stops.

2. The automatic positioning method based on the BeiDou system according to claim 1, characterized in that: The guide gear (21) includes a first half gear (211) and a second half gear (212). The first half gear (211) and the second half gear (212) are both recessed at their centers with an adapter groove (213). The first half gear (211) is connected to the first semicircular plate (12), and the second half gear (212) is connected to the second semicircular plate (13). The adapter groove (213) of the first half gear (211) is consistent with the groove (122) of the first semicircular plate (12), and the adapter groove (213) of the second half gear (212) is consistent with the groove (122) of the second semicircular plate (13).

Images