A forced centering disc device for GNSS measurements

Abstract

A forced accretion device for GNSS measurements includes a base, a support column, an upper large circular disk, a protective cover, and a circular level bubble. The top of the base is connected to the bottom of the support column, and the top of the support column is connected to the bottom of the upper large circular disk. An inner ring is formed at the center of the top of the upper large circular disk, and the protective cover is located within the inner ring. The lower end of the protective cover is threaded into the top of the support column, and a circular level bubble is embedded at the center of the top of the protective cover. A mounting block for mounting an antenna is provided on the top of the protective cover. Multiple sets of support rods are provided around the outer perimeter of the base, and a threaded ring is provided around the outer perimeter of the upper large circular disk, with a combined disk threadedly connected to the outer side of the threaded ring. This invention can meet the needs of different observation scenarios.

Description

Technical Field

[0001] This utility model relates to an improvement of a forced centering disc, belonging to the field of measurement and positioning devices, and particularly to a forced centering disc device for GNSS measurement. Background Technology

[0002] Forced centering plate is a core component used for high-precision positioning in surveying and mapping engineering. It is widely used in deformation monitoring and control measurement of reservoir dams, highway bridges, and rail transit in basic surveying and mapping construction. It is also used in precision engineering such as topographic mapping, earthquake monitoring, and landslide monitoring in land and resources surveying.

[0003] In high-precision GNSS antenna measurement operations, in order to ensure the center alignment between the antenna and the measurement bracket or base, manual alignment or installation with the help of auxiliary tools is usually required. Existing forced centering plates need to be pre-embedded in concrete observation piers. During the pouring process, factors such as concrete shrinkage, uneven heat release, and vibration deviation can easily cause the centering plate to sink or tilt. During the installation process, manual adjustments are required multiple times until the concrete solidifies. During the manual adjustment process, a leveling ruler needs to be carried at all times. The placement of the leveling ruler is random during each leveling process and is greatly affected by human operation, which is not conducive to the accurate leveling operation of the centering plate.

[0004] Chinese patent application CN 202223400484.8, filed on December 19, 2022, discloses a forced centering chassis for measurement, comprising an upper circular block, a middle circular block, and a lower circular block. The upper circular block is fixed to the top of the middle circular block, and the lower circular block is fixed to the bottom of the middle circular block. A fixed threaded hole is provided at the top of the upper circular block, and a protective cover adapted to it is disposed within the fixed threaded hole. A gripping hole is provided at the top of the protective cover. Adjustable threaded holes are evenly distributed circumferentially on the side of the lower circular block, and an adjusting screw is threadedly connected to each adjusting threaded hole. One end of the adjusting screw extends to the outside of the lower circular block. This forced centering chassis for measurement, by providing a fixed threaded hole at the top of the upper circular block, allows for quick and direct installation of a GNSS antenna after installing a fixed support rod within the fixed threaded hole. However, this solution only addresses measurements in a single scenario and cannot meet the needs of different observation scenarios.

[0005] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this patent application and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0006] The purpose of this utility model is to overcome the problems of cumbersome operation and complicated cable fixing in the existing technology, and to provide a cable locking device that is simple to operate and easy to fix the cable.

[0007] To achieve the above objectives, the technical solution of this utility model is: a forced centering disc device for GNSS measurement, the forced centering disc device for GNSS measurement includes a base, a support column, a large upper disc, a protective cover and a circular level bubble; The top of the base is connected to the bottom of the support column, and the top of the support column is connected to the bottom of the upper large disc. An inner ring is opened in the center of the top of the upper large disc, and a protective cover is provided in the inner ring. The lower end of the protective cover is threaded into the top of the support column, and a circular level bubble is embedded in the center of the top of the protective cover. The top of the protective cover is provided with mounting holes for installing an antenna. The outer perimeter of the base is provided with multiple sets of support rods; The outer perimeter of the upper large disc is provided with a threaded ring, and the outer side of the threaded ring is threadedly connected to a combination disc.

[0008] The outer perimeter of the base is provided with a plurality of equally spaced first threaded holes, and a support rod is threaded into each first threaded hole.

[0009] The support rod includes a support part and a connecting part. The side of the support part is connected to one end of the connecting part, and the other end of the connecting part is provided with a threaded part, which is threadedly connected to the first threaded hole.

[0010] The length of the support part is greater than the height of the base, and the support part is perpendicular to the connecting part.

[0011] The base, support column, and upper large disc are an integrated structure.

[0012] The diameter of the large upper disc is the same as the diameter of the base, the diameter of the base is larger than the diameter of the support column, and the diameter of the support column is larger than the diameter of the protective cover.

[0013] The protective cover includes a cover plate and a threaded post. The bottom of the cover plate is connected to the top of the threaded post, and the threaded post is threadedly connected to the top of the support post. A circular level bubble is provided at the center of the top of the cover plate; The top of the cover plate has multiple mounting holes located on the side of the circular level bubble, and all mounting holes are equally spaced.

[0014] The top of the support column is provided with a second threaded hole, which is threadedly engaged with the threaded column.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. In this utility model, a forced centering disc device for GNSS measurement, the top of the base is connected to the bottom of the support column, and the top of the support column is connected to the bottom of the upper large disc. An inner ring is formed at the center of the top of the upper large disc, and a protective cover is installed within the inner ring. The lower end of the protective cover is threaded into the top of the support column, and a circular level bubble is embedded in the center of the top of the protective cover. An antenna mounting hole is provided at the top of the protective cover. Multiple sets of support rods are provided around the outer perimeter of the base, and a threaded ring is provided around the outer perimeter of the upper large disc. A combination disc is threaded onto the outer side of the threaded ring. In application, when measuring continuous stations, first connect the protective cover to the support column and the upper large disc, then combine the base with the multiple support rods, and finally place the forced centering disc device at the measurement location. First, observe the circular level bubble embedded in the top surface of the protective cover to ensure that the top surface of the observation pier is level. If it is not level, manually adjust the device until it is level and ensure the circular level bubble is aligned. In the centered position; first, unscrew the protective cover, then place the antenna in the mounting hole on the protective cover, and then use a triangle ruler to measure the distance from the bottom of the antenna to the top surface of the large disc at the top, which is the antenna height; when measuring the rover, first connect the protective cover to the support column and the large disc at the top, then combine the base with multiple support rods, then rotate the protective cover into the support column and the large disc at the top, and then place the forced centering device at the first observation pier to be measured; first observe the circular level bubble built into the top surface of the protective cover to ensure that the top surface of the observation pier is horizontal. If it is not horizontal, manually adjust the device until it is horizontal and the circular level bubble is centered; first, unscrew the protective cover, then place the antenna in the mounting hole on the protective cover, and then use a triangle ruler to measure the distance from the bottom of the antenna to the top surface of the large disc at the top, which is the antenna height, and then measure the other observation piers in the observation pier area in turn to obtain the final measurement results. The advantages of this design are as follows: Firstly, the upper large disc and the combination disc can be freely combined according to the needs of different observation scenarios. When conducting continuous observation, only the upper large disc needs to be installed and used normally. When conducting mobile observation, the upper large disc and the combination disc are used together. Secondly, the protective cover is threaded to fit the top of the support column, and a circular level bubble is embedded in the center of the top. The horizontal state can be observed directly without removing the protective cover before measurement, which can quickly determine whether the top surface of the observation pier is horizontal, saving the steps of carrying tools and calibration. Thirdly, multiple sets of support rods are evenly distributed around the outer perimeter of the base. The support rods are detachably connected to the base, and the support ends can contact the ground to form external support. In uneven environments such as slopes and soft ground, the device can be leveled by adjusting the extension length of different support rods, while preventing the device from tipping over. Fourthly, the protective cover is precisely aligned with the reference center, and the antenna can be directly fixed to the protective cover to achieve forced centering without the need for additional alignment, thus improving measurement efficiency.

[0016] Therefore, this invention can meet the needs of different observation scenarios.

[0017] 2. This utility model features a threaded ring on the outer perimeter of a large upper disc, with a combined disc threadedly connected to the outer side of the threaded ring. In application, mobile GNSS stations require manual measurement of antenna height for each observation. During this measurement, the lower edge of the ruler falls on the top surface of the concrete observation pier instead of the edge of the upper disc, due to the raised center at the bottom of the GNSS antenna. Over time, the concrete surface may experience wear and cracking from exposure to wind and rain. Without the large disc, the measured antenna height would be inaccurate. Therefore, considering the different needs of continuous and mobile GNSS observation piers, this utility model provides a multi-functional centering disc device that can be freely combined with the upper disc and the combined disc to meet the needs of different observation scenarios. It also facilitates field operation and installation. For continuous observation, only the upper disc needs to be installed and used normally; for mobile observation, the upper disc and the combined disc are used together. Therefore, this utility model allows for combined use.

[0018] 3. In this utility model, a forced centering disc device for GNSS measurement has an upper large circular disc with the same diameter as the base. The base diameter is larger than the support column diameter, which is larger than the protective cover diameter. The protective cover includes a cover plate and a threaded post. The bottom of the cover plate is connected to the top of the threaded post, and the threaded post is threaded to the top of the support column. A circular level bubble is provided at the center of the top of the cover plate. Multiple mounting holes are provided on the side of the circular level bubble on the top of the cover plate. All mounting holes are equidistant. In application: hold the cover plate, align the bottom threaded post with the second threaded hole on the top of the support column, and screw it in until the threaded post is completely flush with the top of the support column. The circular level bubble is then directly integrated into the protective cover. After assembly, it can be directly observed. After the antenna is fixed through the mounting holes, the bottom plane of the antenna is flush with the top surface of the cover plate. During measurement, the top surface of the upper large circular disc is used as a reference, and a triangle ruler is used to vertically measure the straight-line distance from the bottom of the antenna to the top surface of the upper large circular disc, making the measurement more convenient and accurate. Therefore, this utility model makes measurement more convenient and accurate. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model.

[0020] Figure 2 This is a schematic diagram of the connection of the support rod in this utility model.

[0021] Figure 3 This is a schematic diagram of the structure of the large circular disc at the upper end of this utility model.

[0022] Figure 4 This is a schematic diagram of the structure of the protective cover in this utility model.

[0023] Figure 5This is a schematic diagram of the support rod in this utility model.

[0024] Figure 6 This is a schematic diagram of the connection of the combination disc in this utility model.

[0025] In the figure: base 1, first threaded hole 11, support column 2, upper large disc 3, threaded ring 31, inner ring 32, protective cover 4, cover plate 41, threaded column 42, mounting hole 43, circular level bubble 5, support rod 6, support part 61, connecting part 62, threaded part 63, combination disc 7. Detailed Implementation

[0026] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] See Figures 1 to 6 A forced centering disc device for GNSS measurement, the forced centering disc device for GNSS measurement includes a base 1, a support column 2, an upper large disc 3, a protective cover 4 and a circular level bubble 5; The top of the base 1 is connected to the bottom of the support column 2, and the top of the support column 2 is connected to the bottom of the upper large disc 3. An inner ring is provided in the center of the top of the upper large disc 3, and a protective cover 4 is provided in the inner ring 32. The lower end of the protective cover 4 is threaded to the top of the support column 2, and a circular level bubble 5 is embedded in the center of the top of the protective cover 4. The top of the protective cover 4 is provided with a mounting hole 43 for mounting an antenna; The outer perimeter of the base 1 is provided with multiple sets of support rods 6; The outer perimeter of the upper large disc 3 is provided with a threaded ring 31, and the outer side of the threaded ring 31 is threadedly connected to the combination disc 7.

[0028] The outer perimeter of the base 1 is provided with a plurality of equally spaced first threaded holes 11, and a support rod 6 is threaded into each first threaded hole 11.

[0029] The support rod 6 includes a support part 61 and a connecting part 62. The side of the support part 61 is connected to one end of the connecting part 62, and the other end of the connecting part 62 is provided with a threaded part 63, which is threadedly connected to the first threaded hole 11.

[0030] The length of the support part 61 is greater than the height of the base 1, and the support part 61 is perpendicular to the connecting part 62.

[0031] The base 1, support column 2, and upper large disc 3 are an integrated structure.

[0032] The diameter of the upper large disc 3 is the same as the diameter of the base 1, the diameter of the base 1 is larger than the diameter of the support column 2, and the diameter of the support column 2 is larger than the diameter of the protective cover 4.

[0033] The protective cover 4 includes a cover plate 41 and a threaded post 42. The bottom of the cover plate 41 is connected to the top of the threaded post 42, and the threaded post 42 is threadedly connected to the top of the support post 2. A circular level bubble 5 is provided at the center of the top of the cover plate 41; The top of the cover plate 41 is provided with multiple mounting holes 43 on the side of the circular level bubble 5, and all the mounting holes 43 are equally spaced.

[0034] The top of the support column 2 is provided with a second threaded hole 21, which is threadedly engaged with the threaded column 42.

[0035] The supplementary technical features of this invention are as follows: Existing methods require manual measurement, where personnel carry an additional circular bubble level. Each time the centering plate is leveled, the bubble needs to be manually placed on top of the plate to be installed. The placement position may vary each time, introducing additional manual errors for precise leveling. This invention introduces an integrated bubble level, built into a protective cover, which has a fixed position during installation, facilitating observation and leveling operations. Example

[0036] A forced accretion device for GNSS measurements includes a base 1, a support column 2, an upper large circular disk 3, a protective cover 4, and a circular level bubble 5. The top of the base 1 is connected to the bottom of the support column 2, and the top of the support column 2 is connected to the bottom of the upper large circular disk 3. An inner ring 32 is formed at the center of the top of the upper large circular disk 3, and the protective cover 4 is disposed in the inner ring 32. The lower end of the protective cover 4 is threaded to the top of the support column 2, and the circular level bubble 5 is embedded in the center of the top of the protective cover 4. The top of the protective cover 4 is provided with mounting holes 43 for mounting an antenna. Multiple sets of support rods 6 are provided on the outer perimeter of the base 1. The method of using the forced centering disk device for GNSS measurements includes a continuous station measurement process, as detailed below: First, reach the designated observation pier, then take out the integrated base 1, support column 2 and upper large disc 3, then rotate the protective cover 4 into the support column 2 and upper large disc 3, then combine the base 1 with multiple support rods 6, and finally set the base 1 in the observation pier to be measured. The second step is to observe the data of the circular level bubble 5 built into the top surface of the protective cover 4 to obtain the horizontal state of the top surface of the observation pier. If it is not horizontal, manually adjust it until it is horizontal, so that the circular level bubble 5 is centered. The third step is to first unscrew the protective cover 4, then set the antenna in the mounting hole 43 on the protective cover 4, and then use a triangle ruler to measure the distance from the bottom of the antenna to the top surface of the large disc 3 at the top, which is the antenna height. Once the required measurement data is obtained, the process is complete.

[0037] In application: A circular level bubble 5 is embedded in the center of the top of the protective cover 4. The protective cover 4 is connected to the support column 2 by threads. This integrated level bubble design makes the forced centering disc device fixed in position during installation, which is convenient for observation and leveling. There is no need for manual carrying of the circular level bubble. The level status can be observed without disassembly before measurement, which improves the observation accuracy. When using a large GNSS antenna, the traditional upper large circular disc 3 has insufficient area and the bottom of the antenna cannot be placed stably. The combination disc 7 is connected to the outside of the upper large circular disc 3, so that the combination disc 7 and the upper large circular disc 3 form a coaxial integral structure. The top surface of the combination disc 7 is flush with the top surface of the upper large circular disc 3. After assembling the large-diameter combination disc 7, the support area is expanded, the antenna can be fixed stably, and the centering error caused by antenna shaking during the measurement process is avoided. Example

[0038] Example 2 is basically the same as Example 1, except that: The outer perimeter of the base 1 is provided with a plurality of equally spaced first threaded holes 11, and a support rod 6 is threadedly fitted into each first threaded hole 11; the support rod 6 includes a support part 61 and a connecting part 62, the side of the support part 61 is connected to one end of the connecting part 62, and the other end of the connecting part 62 is provided with a threaded part 63, which is threadedly connected to the first threaded hole 11; the length of the support part 61 is greater than the height of the base 1, and the support part 61 is perpendicular to the connecting part 62.

[0039] In application: According to the terrain conditions of the measurement location, connect the threaded part 63 on the support part 61 to the first threaded hole 11. After the assembly is completed, embed the base 1 and the support rod 6 into the observation pier. Example

[0040] Example 3 is basically the same as Example 1, except that: The diameter of the upper large disc 3 is the same as the diameter of the base 1. The diameter of the base 1 is larger than the diameter of the support column 2, and the diameter of the support column 2 is larger than the diameter of the protective cover 4. The protective cover 4 includes a cover plate 41 and a threaded column 42. The bottom of the cover plate 41 is connected to the top of the threaded column 42, and the threaded column 42 is threadedly connected to the top of the support column 2. A circular level bubble 5 is provided at the center of the top of the cover plate 41. Multiple mounting holes 43 are provided on the side of the circular level bubble 5 on the top of the cover plate 41, and all the mounting holes 43 are equidistant.

[0041] In application: The diameter of the protective cover 4 is 10mm, the diameter of the upper large disc 3 is 70mm and the thickness is 10mm, and the thickness of the base 1 is 15mm; hold the cover plate 41, align the bottom threaded post 42 with the second threaded hole 21 on the top of the support 2 and screw it in until the threaded post 42 is completely attached to the top of the support post 2, and integrate the circular bubble level 5 directly into the protective cover 4. After assembly, it can be directly observed; after the antenna is fixed through the mounting hole 43, the bottom plane of the antenna is attached to the top surface of the cover plate 41. When measuring, directly use the top surface of the upper large disc 3 as the reference, and use a triangle ruler to vertically measure the straight distance from the bottom of the antenna to the top surface of the upper large disc 3, which makes the measurement more convenient and accurate. Example

[0042] Example 4 is basically the same as Example 1, except that: A method for using a forced centering device for GNSS measurements, the method further including a rover measurement process, as detailed below: First, arrive at the observation pier area to be measured, then take out the integrated base 1, support column 2 and upper large disc 3, then connect the combination disc 7 to the upper large disc 3 through the threaded ring 31, then rotate the protective cover 4 into the support column 2 and upper large disc 3, then combine the base 1 with multiple support rods 6, and then set the base 1 at the first observation pier to be measured. The second step is to observe the circular level bubble 5 built into the top surface of the protective cover 4 to ensure that the top surface of the observation pier is horizontal. If it is not horizontal, manually adjust the device until it is horizontal and make the circular level bubble 5 centered. The third step is to first unscrew the protective cover 4, then set the antenna in the mounting hole 43 on the protective cover 4, and then use a triangle ruler to measure the distance from the bottom of the antenna to the top surface of the large disc 3 at the top, which is the antenna height. This will give you the measurement data at the first observation pier. After the measurement is completed, rotate the protective cover 4 into the support column 2. Fourth step: Upon reaching the second observation pier, repeat the steps two through three to obtain measurement data at the second observation pier. Then, measure the other observation piers in the observation pier area in sequence to obtain multiple measurement data, thus obtaining the final measurement result.

[0043] The above description is only a preferred embodiment of the present utility model. The protection scope of the present utility model is not limited to the above embodiments. Any equivalent modifications or changes made by those skilled in the art based on the content disclosed in the present utility model should be included in the protection scope recorded in the claims.

Claims

1. A forced centering disc device for GNSS measurements, characterized by: The forced centering disc device for GNSS measurement includes a base (1), a support column (2), a large upper disc (3), a protective cover (4), and a circular level bubble (5). The top of the base (1) is connected to the bottom of the support column (2), the top of the support column (2) is connected to the bottom of the upper large disc (3), and an inner ring is provided in the center of the top of the upper large disc (3), and a protective cover (4) is provided in the inner ring (32). The lower end of the protective cover (4) is threaded to the top of the support column (2), and a circular level bubble (5) is embedded in the center of the top of the protective cover (4). The top of the protective cover (4) is provided with a mounting hole (43) for mounting an antenna. The outer perimeter of the base (1) is provided with multiple sets of support rods (6). The outer perimeter of the upper large disc (3) is provided with a threaded ring (31), and the outer side of the threaded ring (31) is threadedly connected to a combination disc (7).

2. A forced centering disk device for GNSS measurements according to claim 1, characterized in that: The outer perimeter of the base (1) is provided with a plurality of equally spaced first threaded holes (11), and each first threaded hole (11) is threaded with a support rod (6).

3. A forced centering disc device for GNSS measurements according to claim 2, characterized in that: The support rod (6) includes a support part (61) and a connecting part (62). The side of the support part (61) is connected to one end of the connecting part (62), and the other end of the connecting part (62) is provided with a threaded part (63). The threaded part (63) is threadedly connected to the first threaded hole (11).

4. A forced centering disc device for GNSS measurements according to claim 3, characterized in that: The length of the support (61) is greater than the height of the base (1), and the support (61) and the connecting part (62) are arranged perpendicularly.

5. A forced centering disk apparatus for GNSS surveying according to claim 1, characterized in that: The base (1), support column (2), and upper large disc (3) are an integrated structure.

6. A forced centering disk apparatus for GNSS surveying according to claim 1, characterized in that: The diameter of the upper large disc (3) is the same as the diameter of the base (1), the diameter of the base (1) is greater than the diameter of the support column (2), and the diameter of the support column (2) is greater than the diameter of the protective cover (4).

7. A forced centering disc device for GNSS measurements according to claim 6, characterized in that: The protective cover (4) includes a cover plate (41) and a threaded post (42); The bottom of the cover plate (41) is connected to the top of the threaded post (42), and the threaded post (42) is threadedly connected to the top of the support post (2). A circular level bubble (5) is provided at the center of the top of the cover plate (41). The top of the cover plate (41) is provided with multiple mounting holes (43) on the side of the circular level bubble (5), and all the mounting holes (43) are set at equal intervals.

8. A forced centering disc device for GNSS measurements according to claim 7, characterized in that: The top of the support column (2) is provided with a second threaded hole (21), which is threadedly engaged with the threaded column (42).

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