Concentric ring reference ball

Abstract

The utility model discloses a concentric ring reference ball, and relates to the technical field of precision measuring tools. The concentric deviation of a reflective material and a sphere center is large, so that in scenes such as laser tracking measurement, a light reflection path is disordered, and the light spot positioning precision is influenced. The concentric ring reference ball comprises a concentric ring reference ball main body. According to the utility model, the concentric ring reference ball main body, the inclined planes, the annular adjusting groove and the circular groove are arranged, the concentric ring reference ball takes the inner center of the stainless steel ball as a reference point, the inclined planes at the two sides of the annular adjusting groove are utilized to form a wedge-shaped adjusting structure, and a special tool is utilized to apply radial force to realize micron-scale radial fine adjustment of a reflective material; meanwhile, the plane of the bottom surface is in contact with the surface of the target seat, stable constraint is formed by three-point supporting of the edge of the spherical surface, light diffraction is reduced in cooperation with the edge fillet design of the circular groove, and the positioning precision of the reflecting material and the consistency of optical reflection are ensured.

Description

Technical Field

[0001] This utility model relates to the field of precision measuring tools, specifically a concentric ring reference sphere. Background Technology

[0002] In the field of modern industrial measurement and precision manufacturing, the requirements for the positioning accuracy of small components are becoming increasingly stringent. Especially in scenarios such as photogrammetry, laser tracking, and semiconductor testing, the target ball, as a core reference tool, directly affects the system's measurement accuracy due to its concentricity control.

[0003] Regarding the aforementioned technologies, the applicant believes that concentric target spheres have significant limitations in structural design and manufacturing processes, resulting in insufficient measurement stability and low operational efficiency, making them unsuitable for high-precision applications. Target spheres typically employ a monolithic spherical structure, with reflective materials fixed to the surface via adhesive or press-fitting. During manual installation, significant concentricity deviations between the reflective material and the sphere's center can lead to disordered light reflection paths in scenarios such as laser tracking measurements, affecting the accuracy of spot positioning. Utility Model Content

[0004] The purpose of this invention is to provide a concentric ring reference sphere to solve the problem mentioned in the background art, which is that the large concentricity deviation between the reflective material and the center of the sphere leads to disordered light reflection paths and affects the positioning accuracy of the light spot in scenarios such as laser tracking and measurement.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a concentric ring reference sphere, comprising a concentric ring reference sphere body, the concentric ring reference sphere body comprising a stainless steel ball, an annular adjustment groove being formed at the center of the stainless steel ball, a circular groove being formed at the bottom of the annular adjustment groove, a suitable reflective material being provided inside the circular groove, and inclined surfaces being provided at both ends of the annular adjustment groove that slope inward toward the inner side of the concentric ring reference sphere body.

[0006] By adopting the above technical solution, the concentric ring reference sphere body uses the geometric center of a stainless steel sphere with a three-quarter sphere structure as the reference point. Utilizing the wedge-shaped adjustment structure formed by the inclined surfaces on both sides of the annular adjustment groove, radial force is applied using a special tool to achieve micron-level radial fine-tuning of the reflective material. This reduces the concentricity deviation between the reflective material and the sphere center. Simultaneously, the contact between the plane of the concentric ring reference sphere body and the target surface, along with the three-point support at the edge of the sphere, forms a stable constraint. Combined with the rounded corner design of the circular groove edge to reduce light diffraction, this ensures the positioning accuracy of the reflective material and the consistency of optical reflection, thereby reducing the spot positioning error and meeting the ultra-high concentricity and stability requirements of precision measurement scenarios.

[0007] Preferably, the stainless steel ball is configured as a three-quarter sphere.

[0008] By adopting the above technical solution, the center of gravity of the concentric ring reference sphere can be reduced, so that the center of gravity of the concentric ring reference sphere is located directly above the center of the bottom surface. When the concentric ring reference sphere tilts, it can automatically return to the correct position, avoiding the risk of tipping over caused by the excessively high center of gravity of traditional complete spheres, and improving the stability of the concentric ring reference sphere during operation.

[0009] Preferably, the stainless steel ball has mounting blocks that are uniformly and detachably provided at both ends. There are at least two sets of mounting blocks, which are located on both sides of the concentric ring reference ball body.

[0010] By adopting the above technical solution, the mounting blocks can be easily installed on both ends of the stainless steel ball.

[0011] Preferably, the end of the mounting block away from the stainless steel ball is provided with a hand grip, which forms a welded integrated structure or a detachable connection with the mounting block.

[0012] By adopting the above technical solutions, the stability of the handheld grip during operation can be improved.

[0013] Preferably, the hand grips are provided in two sets, which are symmetrically distributed about the center point inside the stainless steel ball.

[0014] By adopting the above technical solution, it is convenient for staff to adjust the position of the stainless steel ball, and the stability of the stainless steel ball when it moves can be improved.

[0015] Preferably, the hand grip is provided with an anti-slip sleeve made of rubber.

[0016] By adopting the above technical solution, the anti-slip sleeve can increase the friction on the outside of the hand grip, thereby making it easier for staff to hold the hand grip and minimizing the risk of the hand grip slipping from the staff's hands.

[0017] Preferably, the mounting block has uniformly distributed mounting holes inside, and these mounting holes are circular.

[0018] By adopting the above technical solution, the mounting block can be easily fixed.

[0019] Preferably, a fixing bolt is installed through the inside of the mounting hole.

[0020] By adopting the above technical solution, the mounting block can be easily installed by passing the fixing bolt through the mounting hole.

[0021] Preferably, bolt mounting grooves are evenly provided at both ends of the stainless steel ball, and the bolt mounting grooves are matched with the fixing bolts.

[0022] By adopting the above technical solution, it is convenient to insert the fixing bolt into the bolt mounting groove and to fix the mounting block on the stainless steel ball.

[0023] Preferably, the fixing bolts pass through the interior of the mounting block and the bolt mounting groove, respectively.

[0024] By adopting the above technical solution, the fixing bolt can be inserted into the bolt mounting groove on the stainless steel ball by passing it through the mounting hole inside the mounting block. This allows the hand grip to be easily installed on the stainless steel ball, and the user can then easily move the concentric ring reference ball body using the hand grip.

[0025] Compared with the prior art, the beneficial effects of this utility model are:

[0026] By incorporating a concentric ring reference sphere body, an inclined surface, an annular adjustment groove, and a circular groove, the concentric ring reference sphere uses the center of the stainless steel sphere as a reference point. Utilizing the wedge-shaped adjustment structure formed by the inclined surfaces on both sides of the annular adjustment groove, radial force is applied using a special tool to achieve micron-level radial fine-tuning of the reflective material. This reduces the concentricity deviation between the reflective material and the sphere's center. Simultaneously, the contact between the bottom plane and the target surface, along with the three-point support at the edge of the sphere, forms a stable constraint. Combined with the rounded corner design of the circular groove, light diffraction is reduced, ensuring the positioning accuracy of the reflective material and the consistency of optical reflection. This minimizes the spot positioning error and meets the ultra-high concentricity and stability requirements of precision measurement scenarios. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0028] Figure 2 This is a three-dimensional structural diagram of the main body of the concentric ring reference sphere of this utility model;

[0029] Figure 3 This utility model Figure 1 Enlarged structural diagram at point A in the middle;

[0030] Figure 4 This is a three-dimensional structural diagram of the hand grip of this utility model.

[0031] In the diagram: 1. Hand grip; 2. Concentric ring reference ball body; 201. Stainless steel ball; 202. Inclined surface; 203. Annular adjustment groove; 204. Circular groove; 205. Reflective material; 3. Anti-slip sleeve; 4. Bolt mounting groove; 5. Fixing bolt; 6. Mounting block; 7. Mounting hole. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] Example 1

[0034] Please see Figures 1 to 4 This embodiment provides a technical solution: a concentric ring reference sphere, including a concentric ring reference sphere body 2. The bottom surface of the concentric ring reference sphere body 2 is a plane, and the concentric ring reference sphere body 2 is used in conjunction with a theodolite of the corresponding model. During installation, it fits against the positioning plane of the target base, and the edge of the sphere forms a three-point contact with the annular boss of the target base, thus forming a stable geometric constraint.

[0035] In this design, the bottom surface of the concentric ring reference sphere body 2 is designed as a plane, which can fit tightly with the positioning plane of the target during installation, ensuring good initial positioning accuracy of the reference sphere during installation. At the same time, the edge of its sphere forms a three-point contact with the annular boss of the target, effectively restricting the degree of freedom of the concentric ring reference sphere body 2 and preventing it from shifting or rotating during measurement, thereby improving the overall measurement stability and repeatability accuracy.

[0036] The concentric ring reference ball body 2 includes a stainless steel ball 201, which can improve the strength of the concentric ring reference ball body 2 and ensure the stability of the adjustment accuracy of the concentric ring reference ball body 2. The stainless steel ball 201 is set as a three-quarter sphere.

[0037] By incorporating a stainless steel ball 201 within the concentric ring reference sphere body 2, the overall strength of the concentric ring reference sphere body 2 is significantly enhanced, thereby ensuring the stability of its adjustment accuracy during use. Simultaneously, the stainless steel ball 201 is designed as a three-quarter sphere, effectively lowering the center of gravity of the concentric ring reference sphere body 2, placing its center of gravity directly above the bottom center. When the concentric ring reference sphere body 2 tilts slightly due to external forces, it can automatically return to its original position under gravity, avoiding the tendency of traditional complete spheres to tip over due to their high center of gravity. This significantly improves the overall stability and reliability of the concentric ring reference sphere body 2 during operation.

[0038] The stainless steel ball 201 has an annular adjustment groove 203 in the center, and a circular groove 204 is formed at the bottom of the annular adjustment groove 203. The edge of the circular groove 204 is rounded.

[0039] This design features an annular adjustment groove 203 at the center of the stainless steel ball 201, with a circular groove 204 at the bottom. The edges of the circular groove 204 are rounded, which helps reduce diffraction at the edges, resulting in a more uniform intensity distribution of reflected light and effectively improving the imaging quality during optical measurement. Furthermore, the rounded corner structure enhances the concentration of light spot energy, making the edges of the light spot clearer and reducing the error in image processing algorithms during recognition.

[0040] The interior of the circular groove 204 is provided with a suitable reflective material 205. The reflective material 205 is a reflective sticker that reflects light through micron-sized glass beads and is adhered to the interior of the circular groove 204. The reflective material 205 is as follows: Figure 1 The image shows multiple sets of concentric black aluminum pillars and reflective material distributed between them. The reflective material is glass microspheres. Specifically, the reflective material 205 can be an aluminum pillar with multiple concentric annular grooves filled with glass microspheres.

[0041] Both ends of the annular adjustment groove 203 are provided with inclined surfaces 202 that tilt inward toward the inner side of the concentric ring reference sphere body 2, forming a wedge-shaped adjustment structure. Specifically, during adjustment, the black aluminum cylinder is moved in the plane, and the entire concentric ring reference sphere body 2 is placed on the target. First, the height direction is adjusted, and then the concentricity is adjusted. In use, the concentric ring reference sphere body 2 is placed at the point, and the center of the concentric ring reference sphere body 2 is found by an external theodolite. When the reflective material 205 moves to the bottom of the annular adjustment groove 203, its surface is flush with the surface of the hemisphere and is fixed by a small amount of adhesive to avoid displacement during the measurement process.

[0042] In this embodiment, inclined surfaces 202 that slope inward toward the inner side of the concentric ring reference sphere body 2 are provided at both ends of the annular adjustment groove 203, forming a wedge-shaped adjustment structure. This allows for fine adjustment of height and concentricity by moving the black aluminum column in the plane during actual adjustment, improving the accuracy of installation and positioning and the convenience of operation. After placing the concentric ring reference sphere body 2 on the target base, the height is adjusted first, followed by the concentricity adjustment, which helps to ensure that its center coincides with the theodolite measurement center, thereby improving the overall measurement accuracy. When the reflective material 205 moves to the bottom of the annular adjustment groove 203 and is flush with the surface of the hemisphere, it is fixed with a small amount of adhesive, effectively preventing displacement during the measurement process.

[0043] The overall effect achieved in the first embodiment is as follows: the concentric ring reference sphere body 2 uses the geometric center of the stainless steel ball 201 with a three-quarter spherical structure as the reference point. The wedge-shaped adjustment structure formed by the inclined surfaces on both sides of the annular adjustment groove 203 is used to apply radial force through a special tool to achieve micron-level radial fine adjustment of the reflective material 205, thereby reducing the concentricity deviation between the reflective material 205 and the center of the sphere. At the same time, the plane of the concentric ring reference sphere body 2 contacts the target surface, and the three-point support of the spherical edge forms a stable constraint. Combined with the rounded corner design of the circular groove 204, light diffraction is reduced, ensuring the positioning accuracy of the reflective material and the consistency of optical reflection, thereby reducing the spot positioning error and meeting the ultra-high concentricity and stability requirements of precision measurement scenarios.

[0044] Example 2

[0045] The stainless steel ball 201 has detachable mounting blocks 6 evenly distributed at both ends. There are at least two sets of mounting blocks 6, located on both sides of the concentric ring reference ball body 2. In this embodiment, four sets are provided, with two sets distributed on each side and symmetrically arranged in pairs. A hand handle 1 is fixedly connected to the end of the mounting block 6 away from the stainless steel ball 201. The mounting block 6 and the hand handle 1 form a welded integrated structure or a detachable connection, which can improve the stability of the hand handle 1 during operation. There are two sets of hand handle 1, which are symmetrically distributed about the internal center point of the stainless steel ball 201, which can facilitate the operator to adjust the position of the stainless steel ball 201 and improve the stability of the stainless steel ball 201 during movement.

[0046] By evenly arranging four sets of mounting blocks 6 at both ends of the stainless steel ball 201, and fixing the hand grip 1 to the end of the mounting block 6 away from the stainless steel ball 201, a welded integrated structure or a detachable connection is formed. This not only enhances the structural stability of the hand grip 1, but also improves the safety and durability during operation. The hand grip 1 is set in two sets and is symmetrically distributed about the internal center point of the stainless steel ball 201, which makes it easier for the operator to adjust the position of the stainless steel ball 201 more evenly during use. This effectively improves the control accuracy and smoothness of operation during movement, thereby ensuring the stability of the entire concentric ring reference ball body 2 during use.

[0047] The outside of the hand grip 1 is provided with an anti-slip sleeve 3, which is made of rubber. The anti-slip sleeve 3 can increase the friction of the outside of the hand grip 1, thereby making it easier for the staff to hold the hand grip 1 and minimizing the risk of the hand grip 1 slipping from the staff's hand. The mounting block 6 has evenly spaced mounting holes 7 inside. The mounting holes 7 are circular, and a fixing bolt 5 is inserted through the mounting holes 7.

[0048] By setting a rubber anti-slip sleeve 3 on the outside of the hand grip 1, the friction of the surface of the hand grip 1 is effectively increased, significantly improving the grip comfort and stability of the operator during operation, reducing the risk of slipping due to sweaty hands or accidental slippage, and ensuring the safety of equipment operation; at the same time, circular mounting holes 7 are evenly opened inside the mounting block 6, and fixing bolts 5 are installed through the mounting holes 7, making the fixing process of the mounting block 6 simpler and more reliable, which helps to realize efficient assembly and disassembly between modules, thereby improving the stability of the overall structure.

[0049] The stainless steel ball 201 has bolt mounting grooves 4 evenly distributed at both ends. The bolt mounting grooves 4 match the fixing bolts 5, which can be easily inserted into the bolt mounting grooves 4. The mounting block 6 can be easily fixed on the stainless steel ball 201. The fixing bolts 5 pass through the mounting block 6 and the bolt mounting grooves 4 respectively. By passing the fixing bolts 5 through the mounting holes 7 and inserting them into the bolt mounting grooves 4 on the stainless steel ball 201, the hand grip 1 can be easily installed on the stainless steel ball 201.

[0050] By evenly opening bolt mounting grooves 4 at both ends of the stainless steel ball 201, the fixing bolts 5 can be precisely matched with it, making it easy for the fixing bolts 5 to be inserted into the bolt mounting grooves 4, thus achieving a quick and reliable connection between the mounting block 6 and the stainless steel ball 201, thereby ensuring that the hand grip 1 can be firmly installed on the stainless steel ball 201. The fixing bolts 5 are inserted into the bolt mounting grooves 4 by passing through the mounting holes 7 on the mounting block 6 in sequence, which not only simplifies the assembly process and improves the assembly efficiency, but also enhances the overall structural strength and vibration resistance.

[0051] The effect achieved by the entire second embodiment is as follows: by passing the fixing bolt 5 through the internal mounting hole 7 of the mounting block 6, the fixing bolt 5 can be inserted into the bolt mounting groove 4 on the stainless steel ball 201, which makes it easy to install the mounting block 6 on the stainless steel ball 201 and to fix the hand handle 1 at both ends of the stainless steel ball 201. Then, it is convenient for the staff to move the concentric ring reference ball body 2 using the hand handle 1, thus improving the practicality of the device.

[0052] Working principle: The concentric ring reference sphere body 2 uses the geometric center of the stainless steel ball 201 with a three-quarter spherical structure as the reference point. It utilizes the wedge-shaped adjustment structure formed by the inclined surfaces on both sides of the annular adjustment groove 203. Specifically, during adjustment, the black aluminum cylinder is moved in the plane, and the entire concentric ring reference sphere body 2 is placed on the target. First, the height direction is adjusted, and then the concentricity is adjusted. In use, the concentric ring reference sphere body 2 is placed at the point, and the center of the concentric ring reference sphere body 2 is found by an external theodolite. When the reflective material 205 moves to the bottom of the annular adjustment groove 203, its surface is flush with the surface of the hemisphere. It is fixed by a small amount of adhesive to avoid displacement during measurement. At the same time, the plane of the concentric ring reference sphere body 2 contacts the surface of the target and the three-point support of the edge of the sphere forms a stable constraint. Combined with the rounded corner design of the circular groove 204, it reduces light diffraction and ensures the positioning accuracy of the reflective material 205 and the consistency of optical reflection, so as to reduce the spot positioning error and meet the ultra-high concentricity and stability requirements of precision measurement scenarios.

[0053] Finally, by passing the fixing bolt 5 through the internal mounting hole 7 of the mounting block 6, the fixing bolt 5 can be inserted into the bolt mounting groove 4 on the stainless steel ball 201, which makes it easy to install the mounting block 6 on the stainless steel ball 201 and to fix the hand handle 1 to both ends of the stainless steel ball 201. Then, the staff can use the hand handle 1 to move the concentric ring reference ball body 2, which improves the practicality of the device.

[0054] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., 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. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0055] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A concentric ring reference sphere, characterized in that, Includes the main body of the concentric ring reference sphere; The concentric ring reference sphere body includes a stainless steel sphere, and an annular adjustment groove is formed in the center of the stainless steel sphere. The bottom of the annular adjustment groove is provided with a circular groove, and the inside of the circular groove is provided with a suitable reflective material. Both ends of the annular adjustment groove are provided with inclined surfaces that tilt towards the inside of the concentric ring reference sphere body.

2. The concentric ring reference sphere of claim 1, wherein: The stainless steel ball is configured as a three-quarter sphere.

3. The concentric ring reference sphere of claim 1, wherein: The stainless steel ball has mounting blocks that are detachably and uniformly arranged at both ends. There are at least two sets of mounting blocks, which are located on both sides of the concentric ring reference ball body.

4. The concentric ring reference sphere of claim 3, wherein: The mounting block is provided with a hand grip at the end away from the stainless steel ball. The hand grip and the mounting block form a welded integrated structure or a detachable connection.

5. The concentric ring reference sphere of claim 4, wherein: The hand grip is provided in two sets, which are symmetrically distributed about the center point inside the stainless steel ball.

6. The concentric ring reference sphere of claim 4, wherein: The hand grip is provided with an anti-slip sleeve made of rubber.

7. The concentric ring reference sphere of claim 3, wherein: The mounting block has uniformly distributed mounting holes inside, and these mounting holes are circular.

8. The concentric ring reference sphere according to claim 7, characterized in that: A fixing bolt is installed through the interior of the mounting hole.

9. The concentric ring reference sphere according to claim 1, characterized in that: The stainless steel ball has bolt mounting grooves evenly distributed at both ends, which fit into the fixing bolts.

10. The concentric ring reference sphere of claim 8, wherein: The fixing bolts pass through the interior of the mounting block and the bolt mounting groove, respectively.

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