Centering beacon

Abstract

The utility model discloses a centering beacon which comprises a centering rod, an elastic sleeve, a reflective coating and a plurality of shading fins, according to the application, the reflective coating is arranged on the elastic sleeve, the elastic sleeve can slide up and down on the centering rod and is fixed, the centering bolt is mounted on the forced centering disc during use, and the height difference between the reflective coating and the forced centering disc is obtained through measurement; the centering beacon which can only be used for orientation originally is changed into the centering beacon which can be used for accurately measuring the target height, so that the free station setting function of the total station is realized (space resection), and the cost is not increased; through the cooperation of the plurality of shading fins and the elastic sleeve, the influence of an arc curved surface at the reflective coating on light signal reflection is reduced, a more accurate and stable prism constant (distance correction number) can be obtained, the shading fins are used for shielding the range of large curvature change of the side edge of the cylinder, and the influence of the curvature on the distance correction number is reduced.

Description

Technical Field

[0001] This utility model relates to the field of analysis and measurement control auxiliary device technology, and in particular to a centering target. Background Technology

[0002] Total stations are widely used in many industries such as surveying engineering, civil engineering, and water conservancy and hydropower construction. Their operation methods include polar coordinate method and resection method. Both methods require determining the azimuth and distance from the instrument to the backsight point, thus necessitating the installation of a prism at the backsight point. Patent CN111811490A, entitled "A Low-Cost Multi-Azimuth Orientation Centering Target," discloses an improved low-cost multi-azimuth orientation centering target, including a centering rod. A spirit level is magnetically connected to the top of the centering rod, and a cap is fitted onto the bottom of the centering rod. A ball head is threaded onto the bottom of the centering rod, and the cap covers the upper half of the ball head. A centering bolt is threaded onto the bottom of the cap. The top of the centering bolt has a cavity, and the bottom wall of the cavity has an internal hexagonal hole. The lower half of the ball head mates with the cavity of the centering bolt. This scheme enables omnidirectional distance measurement and orientation, meeting the needs of station placement in different azimuths; it can be fixed on the observation pier for long-term use. However, this scheme also has a problem: it cannot determine the height of the target.

[0003] Therefore, this utility model provides a centering target to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to design a centering target to solve the above-mentioned problems.

[0005] This utility model achieves the above objectives through the following technical solutions:

[0006] A centering target includes a centering rod; a spirit level is magnetically connected to the top of the centering rod, a cap is fitted onto the bottom of the centering rod, and a ball head is threaded onto the bottom of the centering rod. The cap covers the upper half of the ball head, and a centering bolt is threaded onto the bottom of the cap. The top of the centering bolt has a cavity, and the bottom wall of the cavity has an internal hexagonal hole. The lower half of the ball head mates with the cavity of the centering bolt. The centering target also includes:

[0007] Elastic sleeve; the elastic sleeve is fitted onto the centering rod, and the height of the elastic sleeve on the centering rod can be adjusted;

[0008] Reflective coating; a reflective coating is provided around the outer wall of the elastic sleeve.

[0009] Furthermore, the centering target also includes multiple light-shielding fins, which are vertically installed on the outer wall of the elastic sleeve, dividing the surface of the elastic sleeve into multiple areas.

[0010] Preferably, multiple light-shielding fins are evenly distributed around the vertical axis of the elastic sleeve, and the planes containing the multiple light-shielding fins intersect at the vertical axis of the elastic sleeve.

[0011] Preferably, there are eight light-shielding fins.

[0012] Preferably, the light-shielding fins are formed into a rectangular plate-like structure.

[0013] As another preferred option, the top of the centering rod is threadedly connected to a prism.

[0014] Furthermore, the bottom end of the cap is threaded to the inner wall of the cavity of the centering bolt.

[0015] The beneficial effects of this utility model are as follows:

[0016] In this application, by setting the reflective coating on the elastic sleeve, and the elastic sleeve can slide up and down and be fixed on the centering rod, and the centering bolt is installed on the forced centering plate during use, the height difference between the reflective coating and the forced centering plate is obtained by measurement. The centering target that could only be used for orientation is transformed into a centering target that can accurately measure the height of the target, thereby realizing the free station setting function of the total station (spatial resection) without increasing the cost.

[0017] By setting multiple light-shielding fins in conjunction with elastic sleeves, the influence of the curved surface at the reflective coating on the reflection of light signals is reduced, resulting in a more accurate and stable prism constant (distance correction). The light-shielding fins are used to block the range of large curvature changes on the side of the cylinder, reducing the influence of curvature on the distance correction. Attached Figure Description

[0018] Figure 1 This is an exploded view of the structure of a centering target proposed in this invention;

[0019] Figure 2 This is a schematic diagram of the centering target proposed in this invention after assembly;

[0020] Figure 3 This is a cross-sectional view of a centering target after assembly, as proposed in this invention;

[0021] Figure 4 This is a cross-sectional view of a centering target proposed in this invention after it has been installed with the observation pier and the centering plate;

[0022] Figure 5 This is a schematic diagram of a centering target after installation with the observation pier and centering plate according to the present invention;

[0023] Figure 6 for Figure 4 Enlarged view of the structure of part A in the middle;

[0024] Figure 7 This is a schematic diagram of the elastic sleeve structure;

[0025] Figure 8 Example 1 of an effective reflective surface;

[0026] Figure 9 Example 2 is an effective reflective surface.

[0027] In the diagram: 1-level bubble, 2-centering rod, 3-cap, 4-ball head, 5-internal hexagonal hole, 6-centering bolt, 7-light-shielding fin, 8-reflective coating, 9-forced centering plate, 10-centering plate cover, 11-elastic sleeve, 12-effective reflective surface. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0030] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0031] In the description of this utility model, it should be understood that the terms "upper", "lower", "inner", "outer", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use, or the orientation or positional relationship that is commonly understood by those skilled in the art. They are only used to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0032] Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0033] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, terms such as "set" and "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0035] like Figure 1-3 As shown in Figure 7, a centering target includes a centering rod 2; a spirit level 1 is magnetically connected to the top of the centering rod 2, a cap 3 is fitted onto the bottom of the centering rod 2, and a ball head 4 is threaded onto the bottom of the centering rod 2. The cap 3 covers the upper half of the ball head 4, and a centering bolt 6 is threaded onto the bottom of the cap 3. The top of the centering bolt 6 has a cavity, and an internal hexagonal hole 5 is formed on the bottom wall of the cavity. The lower half of the ball head 4 cooperates with the cavity of the centering bolt 6. The centering target further includes:

[0036] Elastic sleeve 11; the elastic sleeve 11 is fitted onto the centering rod 2, and the height of the elastic sleeve 11 on the centering rod 2 can be adjusted;

[0037] Reflective coating 8; The reflective coating 8 is provided in a ring on the outer wall of the elastic sleeve 11.

[0038] like Figure 1-3 As shown in Figure 7, the centering target also includes eight light-shielding fins 7, which are vertically mounted on the outer side wall of the elastic sleeve 11, and the eight light-shielding fins 7 divide the surface of the elastic sleeve 11 into multiple areas.

[0039] like Figure 7 As shown, eight light-shielding fins 7 are evenly distributed around the vertical axis of the elastic sleeve 11, and the planes containing the eight light-shielding fins 7 intersect at the vertical axis of the elastic sleeve 11.

[0040] like Figure 7 As shown, the light-shielding fin 7 is formed into a rectangular plate-like structure.

[0041] In this application, by setting multiple light-shielding fins in conjunction with an elastic sleeve, the influence of the curved surface at the reflective coating on the reflection of light signals is reduced, specifically as follows: Figure 8 and 9 As shown, the effective reflective surface is illustrated when photoelectric signals act on the reflective coating 8 on the light-shielding fin 7 and the elastic sleeve 11.

[0042] In some embodiments, when the bubble level 1 is not provided, a prism can be threadedly connected to the top of the centering rod 2. The prism can be a Leica Mini prism (the mini prism and the magnetic bubble level are optional; the end of the centering rod is designed with a thread corresponding to the mini prism, and either the mini prism or the magnetic bubble level can be installed; the mini prism also has a bubble level, and both can be used to correct the centering rod and adjust its verticality).

[0043] like Figure 3 As shown, the bottom end of the cap 3 is threaded to the inner wall of the cavity of the centering bolt 6.

[0044] In some embodiments, the center rod is made of a corrosion-resistant and rigid material, preferably stainless steel, the elastic sleeve 11 is made of rubber, and the light-shielding fin 7 can also be made of rubber; the reflective coating 8 is made of a high refractive index material to improve the light wave reflectivity, and is made of glass microsphere reflective material with hydrophobic properties to ensure that the surface does not stick to water after rain; and the coating should have a certain durability and be able to resist wind and rain erosion.

[0045] 8. Reflective coating: The coating should be made of high refractive index material to improve light reflectivity; the coating should be made of hydrophobic material to ensure that the surface does not stick to water after rain; the coating should have a certain degree of durability and be able to resist wind and rain erosion.

[0046] In this plan:

[0047] After the level bubble 1 is connected to the centering rod 2, the level surface of the level bubble 1 must be perpendicular to the axis of the centering rod 2.

[0048] The threads at both ends of the centering rod 2 adopt the universal thread specification that is compatible with the Leica Mini prism; after the centering rod 2 is connected to the Leica Mini prism, the axis of the centering rod 2 is required to coincide with the centering axis of the Leica Mini prism; the lower end of the centering rod 2 is threaded to the ball head 4, and the axis of the centering rod 2 coincides with the center of the ball head 4.

[0049] The cap 3 is preferably made of a corrosion-resistant and rigid material, such as stainless steel. The cap 3 is tightened by hand, and the surface of the cap 3 is knurled to increase friction. It is connected to the centering bolt 6 by thread, and the axis of the cap 3 coincides with the axis of the centering bolt 6. The cap 3 is placed on the ball head 4 to fasten the ball head 4 in the centering bolt 6. The diameter of the cap hole is larger than the diameter of the centering rod 2, so that the centering rod 2 can move within the cap hole to adjust the perpendicularity of the centering rod 2.

[0050] The ball head 4 is preferably made of a corrosion-resistant and rigid material, such as stainless steel; it is threaded to the centering rod 2, and the center of the ball head 4 coincides with the axis of the centering rod 2; it is in contact with the cap 3, and the center of the ball head 4 coincides with the axis of the cap 3; the ball head 4 is placed in the cavity formed after the centering bolt 6 and the cap 3 are connected, and the ball head 4 can rotate freely with the center of the ball head as the center.

[0051] The internal hexagonal socket 5 is used to fasten the centering bolt 6, using the national standard internal hexagonal socket specification.

[0052] The centering bolt 6 is preferably made of a corrosion-resistant and rigid material, such as stainless steel; it is threaded to the forced centering disc 7, with the axis of the centering bolt 6 coinciding with the axis of the forced centering disc 7; it is in contact with the ball head 4, with the axis of the centering bolt 6 coinciding with the center of the ball head 4; and it is threaded to the cap 3, with the axis of the centering bolt 6 coinciding with the axis of the cap 3.

[0053] like Figure 1-6 The following is an example of how to install and use this application:

[0054] (1) Place the centering plate cover 10 on the forced centering plate 9;

[0055] (2) Connect the centering bolt 6 to the forced centering plate;

[0056] (3) Use an Allen wrench to tighten the centering bolt 6 through the Allen hole 5;

[0057] (4) Connect the centering rod 2 to the ball head 4;

[0058] (5) Connect the ball head 4 to the centering bolt 6;

[0059] (6) Pass the cap 3 through the centering rod 2 and place it on the ball head 4 to connect with the centering bolt 6;

[0060] (7) Pull the elastic sleeve 11 outwards through the light-shielding fin 7 and then put it on the centering rod 2;

[0061] (8) Connect the bubble level 1 to the centering rod 2;

[0062] (9) Use bubble level 1 to adjust centering rod 2 to plumb line;

[0063] (10) Secure the ball head 4 with the cap 3;

[0064] (11) Use a measuring tape to measure and adjust the distance between the center point of the reflective coating 8 and the centering plate 9. (1. A reference point for measuring the prism height is set on the centering plate 9. The distance can be obtained by measuring from the reference point to the center point of the reflective coating 8 with a measuring tape. The measurement of this distance value is used to determine the height difference (i.e., the prism height) between the reflective coating 8 and the reference point. Then, the elevation of the reference point on the centering plate 9 is obtained by observation and calculation. 2. Adjusting this distance is to round the measurement value, which is convenient for memorization and standardization of the prism height.)

[0065] (12) Remove the bubble level 1 (or mini prism). The entire device is now installed. (The prism and bubble level are optional. Installing the mini prism (threaded connection) also uses the bubble level on it to calibrate the centering rod.)

[0066] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A centering target, comprising a centering rod (2), a bubble (1) is magnetically connected to the top end of the centering rod (2), a cap (3) is sleeved on the bottom end of the centering rod (2), a ball head (4) is threadedly installed on the bottom end of the centering rod (2), the cap (3) covers the upper half of the ball head (4), a centering bolt (6) is threadedly installed on the bottom end of the cap (3), a cavity is formed in the top end of the centering bolt (6), an internal hexagonal hole (5) is formed in the bottom wall of the cavity, and the lower half of the ball head (4) and the cavity of the centering bolt (6) are matched with each other, characterized in that, The central target also includes: Elastic sleeve (11); The elastic sleeve (11) is fitted onto the centering rod (2), and the height of the elastic sleeve (11) on the centering rod (2) can be adjusted; Reflective coating (8); The reflective coating (8) is provided in a ring on the outer wall of the elastic sleeve (11).

2. A centring target according to claim 1, characterised in that The centering target also includes multiple light-shielding fins (7), which are vertically installed on the outer side wall of the elastic sleeve (11) and divide the surface of the elastic sleeve (11) into multiple areas.

3. A centring target according to claim 2, characterised in that Multiple light-shielding fins (7) are evenly distributed around the vertical axis of the elastic sleeve (11), and the planes of the multiple light-shielding fins (7) intersect at the vertical axis of the elastic sleeve (11).

4. A centring target according to claim 2, characterised in that There are eight light-shielding fins (7).

5. A centering target according to claim 2, wherein, The light-shielding fins (7) are formed into a rectangular plate-like structure.

6. A centering target according to claim 1, wherein, The top of the center rod (2) is connected to a prism by a thread.

7. A centering target according to claim 1, wherein, The bottom end of the cap (3) is threaded to the inner wall of the cavity of the centering bolt (6).

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