Angle verification platform

Abstract

The invention relates to the technical field of precision measurement and angle verification, and discloses an angle verification platform, which comprises a main body and two end plates, and is characterized in that the upper surface of the main body is a plane for placing an instrument to be verified; the two end plates are oppositely arranged on the two transverse sides of the main body in parallel and are detachably connected with the main body; each end plate is provided with scales used for marking the position of the end of the main body. When the two transverse ends of the main body are at the same height, the upper surface of the main body is in a horizontal state, namely the inclination angle is zero; when the two transverse ends of the main body are at different heights, the upper surface of the main body is in an inclined state; at the moment, the difference H of the identification values of the two ends of the main body on the scales of the end plates is read, and under the condition that the length L of the main body and the thickness D of the end plates are known, the inclination angle theta of the upper surface of the main body can be calculated through a trigonometric function such as tan theta = H / (L + D). The angle measuring device is simple in structure, convenient to operate and capable of generating stable and accurate known angle values.

Description

Technical Field

[0001] This invention relates to the field of precision measurement and angle calibration technology, and in particular to an angle calibration platform. Background Technology

[0002] An angle calibration platform is a device used to calibrate the angles of instruments such as levels and inclinometers. Its specific structure usually includes a horizontal platform. The horizontal platform is placed in an inclined state with a known tilt angle. Then, the level or inclinometer to be calibrated is placed on the horizontal platform. Since the tilt angle of the horizontal platform is known, the accuracy of the level can be judged by whether the reading of the level or inclinometer is consistent with the known tilt angle.

[0003] From a traceability or metrology perspective, the verification and calibration of levels and inclinometers commonly utilize small-angle measuring instruments or dividing heads. This method offers a high degree of automation but also results in high product costs. The angle values ​​produced depend on the accuracy and repeatability of the measuring device, and it is typically used in a fixed laboratory environment.

[0004] For many applications, it is often only necessary to obtain a fixed and reliable set of angle values ​​for verification, and using high-cost precision equipment is not cost-effective.

[0005] Furthermore, when the accuracy of angle measuring instruments is questioned during field use, there is a lack of a simple, stable, and quick-to-use calibration tool. Therefore, the market urgently needs an angle calibration platform based on the principle of physical measuring tools, with good stability and repeatability, and at a low cost, to meet the need for convenient and efficient calibration. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide an angle verification platform that is simple in structure, easy to operate, and capable of generating stable and accurate known angle values.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: An angle calibration platform includes a main body and two end plates. The upper surface of the main body is a plane for placing the instrument to be calibrated. The two end plates are arranged parallel to each other on the lateral sides of the main body and are detachably connected to the main body. Each end plate is provided with a scale for marking the position of the end of the main body. Correspondingly, the main body is provided with an indicator line that can be aligned with the scale. When the two ends of the main body are at the same height, it indicates that its upper surface is horizontal, that is, the tilt angle is zero; When the two ends of the main body are at different heights, it indicates that its upper surface is tilted. At this time, the difference △H between the marking values ​​of the two ends of the main body on their respective end plate scales is read. Given that the length L of the main body and the thickness D of the end plate are known, the tilt angle θ of the upper surface of the main body can be calculated by using trigonometric functions, such as tanθ = △H / (L+D).

[0008] Optionally, a groove is provided at the middle position of both sides of the main body, the groove extends through the thickness direction of the main body, and a plurality of toothed portions are evenly arranged in the groove along the thickness direction of the main body; a long strip toothed plate is fixedly provided at the middle of the side of the end plate facing the main body, the toothed plate extends along the height direction of the end plate, and a plurality of biting teeth are evenly arranged along the height direction of the toothed plate on the side of the toothed plate facing the main body, the biting teeth being adapted to bite the toothed portions.

[0009] Optionally, the upper surface of the main body is provided with grid lines, which are recessed downwards and arranged in a crisscross pattern.

[0010] Optionally, the toothed plate is fixedly mounted on the end plate by a first bolt.

[0011] Optionally, the end plate has an embedding groove in the middle that is adapted to the toothed plate, and the toothed plate is embedded in the embedding groove and connected by the first bolt.

[0012] Optionally, the main body and the end plate are detachably connected by a second bolt.

[0013] Optionally, the main body has threaded holes on both sides of the groove, and the end plate has elongated holes parallel to the toothed plate on both sides of the toothed plate, with bolts passing through the elongated holes and threadedly connected to the threaded holes.

[0014] Optionally, a washer is provided between the bolt and the end plate.

[0015] Optionally, both end plates are provided with cylindrical support columns at their lower ends. The support columns extend along the lower edge of their respective end plates, and the support columns enable the contact surface between the end plate and the horizontal support surface to be an arc surface.

[0016] Optionally, the lower end of the end plate is provided with a semi-circular groove adapted to the support column, and part of the support column is inserted into the semi-circular groove with its bottom exposed outside the end plate.

[0017] The angle verification platform of this invention has the following advantages compared with the prior art: 1. This invention ingeniously integrates level judgment and angle measurement functions. By observing the relative positions of the two ends of the main body on the end plate scale, it is possible to intuitively determine whether the platform is level. When there is a tilt, the scale values ​​at both ends can be directly read and the height difference ΔH can be calculated. Then, the precise tilt angle can be obtained through simple trigonometric function calculations, achieving a seamless connection from qualitative judgment to quantitative measurement.

[0018] 2. The entire platform consists of only three main components: the main body and two end plates, resulting in a very simple structure. This streamlined design reduces manufacturing costs and also means fewer potential points of failure, improving the platform's mechanical stability and long-term reliability. The components are connected in a detachable manner, without complex transmission or adjustment mechanisms, ensuring the overall structural stability.

[0019] 3. The operation process is extremely simple, requiring no complex settings or external power source. Users only need to adjust the platform to the desired state (horizontal or tilted), read the scale, and perform simple calculations. This ease of use makes the platform suitable not only for metrology laboratories but also for rapid, temporary angle calibration work in workshops, fields, and other field environments, greatly expanding its application scenarios.

[0020] 4. The main body and end plates are detachably connected, a design that offers multiple advantages. First, it greatly facilitates the packaging, transportation, and storage of the platform, allowing it to be broken down into smaller units and saving space. Second, when a component of the platform (such as the upper surface of the main body) wears out due to long-term use, it can be partially replaced or repaired, reducing maintenance costs and extending the overall lifespan of the tool. Attached Figure Description

[0021] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 A schematic diagram of the angle verification platform provided in an embodiment of the present invention; Figure 2 An exploded view of the angle verification platform provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the main body in an embodiment of the present invention; Figure 4 This is a schematic diagram of the working principle of the angle calibration platform.

[0023] Explanation of reference numerals in the attached figures: Main body 1; upper surface 11; grid line 111; groove 12; toothed part 13; threaded hole 14; indicator line 15; end plate 2; scale 21; toothed plate 22; meshing tooth 221; embedding groove 23; elongated hole 24; semi-circular groove 25; first bolt 3; second bolt 4; washer 41; support column 5; horizontal support surface 6. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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, 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.

[0025] Unless otherwise defined, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and accompanying drawings are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or accompanying drawings are used to distinguish different objects, not to describe a particular order or hierarchy.

[0026] In this invention, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this invention can be combined with other embodiments.

[0027] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0028] Reference Figures 1 to 4 This invention provides an angle verification platform, which includes a main body 1 and two end plates 2.

[0029] The main body 1 is typically a rectangular structure made of rigid metal or high-strength engineering plastic. Its upper surface 11 is a smooth plane for stably placing the instruments to be calibrated. For easy positioning, the upper surface 11 is machined with downward-recessed grid lines 111. These grid lines 111 intersect to form a square grid, facilitating the marking of the placement positions of instruments such as levels and inclinometers, ensuring consistent placement each time. A square groove 12 is formed in the middle of each side of the main body 1 along its horizontal (length) direction, extending along the thickness direction of the main body 1. Within each groove 12, multiple toothed portions 13 are evenly arranged along the vertical direction (thickness direction of the main body). In this embodiment, the toothed portions 13 are triangular teeth with beveled upper and lower surfaces, and their ends extend beyond the opening of the groove 12 for ease of manufacturing.

[0030] Two end plates 2 are square plate structures of the same shape and size, arranged parallel to each other at the two transverse ends of the main body 1, so that the platform as a whole is approximately "H" shaped. A long strip of toothed plate 22 is fixedly installed on the middle of the side of each end plate 2 facing the main body 1 by multiple first bolts 3. The toothed plate 22 is at the same height as the end plate 2. Multiple vertically distributed interlocking teeth 221 are provided on the surface of the toothed plate 22 facing the main body 1. The shape of the interlocking teeth 221 is perfectly matched with the toothed portion 13 on the main body 1, allowing them to mesh with each other, making the fit between the main body and the end plate tighter and preventing gaps from affecting the angle of the main body.

[0031] Each end plate 2 has clearly printed or engraved vertical scales 21 on its outer surface. The zero point of the scale 21 can be defined at the upper edge of the end plate 2 or other suitable reference position. The scale 21 is used to indicate the height value aligned with the end edge of the body 1. Accordingly, the outer surface of the body 1 is provided with an indicator line 15 that can be aligned with the scale 21 to read the scale 21 on the end plate 2.

[0032] For example, an embedding groove 23 can be opened in the middle of the end plate 2, and the toothed plate 22 is precisely embedded in this groove and locked by the first bolt 3, so that the assembly is more stable and the appearance is flatter.

[0033] For example, the main body 1 and the end plate 2 are detachably connected by a second bolt 4. Specifically, the main body 1 has multiple pairs of threaded holes 14 on both sides of the groove 12, and the end plate 2 has vertical elongated holes 24 on both sides of the toothed plate 22. The second bolt 4 passes through the washer 41 and the elongated hole 24 in sequence and is screwed into the threaded hole 14 on the side of the main body 1, thereby detachably fixing the end plate 2 and the main body 1 together. The elongated hole 24 provides space for vertical adjustment, making it easy for the meshing teeth 221 to accurately engage with the toothed part 13 to the required position during installation. The washer 41 can prevent the bolt from loosening, improve the stability of the connection between the bolt 4 and the end plate 2, and protect the surface of the end plate 2.

[0034] For example, both end plates 2 are provided with cylindrical support columns 5 at their lower ends. The support columns 5 extend along the lower edge of their respective end plates 2, making the contact surface between the end plate 2 and the horizontal support surface 6 an arc surface. Specifically, a semi-circular groove 25 is provided at the lower edge of each end plate 2. A cylindrical support column 5 is partially embedded in the semi-circular groove 25 and fixed by adhesive or fasteners, with its cylindrical bottom protruding outside the end plate 2. This allows the entire end plate 2 to contact (line contact) with the horizontal support surface 6, such as the desktop or platform, through the arc surface of the support column 5, which can function similarly to a sine compass cylinder. This means that the angle value generated by adjusting the position of the end plates is only related to the relative height difference between the adjusted end plates and is independent of the bottom contact surface, effectively eliminating interference caused by unevenness of the bottom contact surface and improving the accuracy and repeatability of the measurement.

[0035] Based on the above angle verification platform, its working principle and usage process are as follows: Initial installation: Install the two end plates 2 at both ends of the main body 1 using the toothed interlocking structure, tighten the second bolts 4, and ensure that the main body 1 and the end plates 2 fit tightly together.

[0036] Tilt Angle Verification: When the two ends of the main body 1 engage with the teeth at the same height on the two end plates 2, the main body 1 is in a horizontal state, and the tilt angle of its upper surface is zero. When a tilt angle is required, the two ends of the main body 1 are engaged with the teeth at different heights on the end plates 2, thereby creating a height difference ΔH between the two ends of the main body 1. This height difference ΔH can be obtained by reading the difference between the marked values ​​on the respective end plates 2 at the two ends of the main body 1. Furthermore, given the length L of the main body 1 and the thickness D of the end plates 2, the tilt angle θ of the upper surface of the main body 1 can be calculated using the trigonometric function: tanθ = ΔH / (L+D). Based on this, a level or inclinometer can be placed on the main body 1, and the reading of the level or inclinometer can be read. The reading is compared with the previously calculated tilt angle θ to determine whether the error between the reading and the tilt angle θ is within the allowable range, thereby determining whether the level or inclinometer is accurate.

[0037] Application of grid lines: The grid lines 111 on the upper surface 11 can be used to assist in positioning the workpiece, ensuring that the workpiece placement direction is consistent with the measurement direction, and improving measurement accuracy.

[0038] Disassembly and maintenance: Loosen the second bolt 4 to remove the end plate 2 from the main body 1 for easy storage, transportation or cleaning and maintenance of the toothed structure.

[0039] It is understandable that, depending on the verification requirements, smaller pitch teeth and tooth profiles can be machined. Furthermore, by adjusting the position between the two end plates and the central body, more flexible angle values, especially small angle values, can be obtained.

[0040] The above are merely embodiments of the present invention and are not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of the present invention should be included within the scope of the claims of the present invention.

[0041] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. An angle verification platform, characterized in that, include: The main body has a flat surface on its upper surface for placing the instrument to be calibrated; Two end plates are provided, which are arranged parallel to each other on the lateral sides of the main body and are detachably connected to the main body; each end plate is provided with a scale for marking the position of the end of the main body; correspondingly, the main body is provided with an indicator line that can be aligned with the scale. When the two ends of the main body are at the same height, it indicates that its upper surface is horizontal, that is, the tilt angle is zero; When the two ends of the main body are at different heights, it indicates that its upper surface is tilted. At this time, the difference △H between the marking values ​​of the two ends of the main body on their respective end plate scales is read. Given the length L of the main body and the thickness D of the end plate, the tilt angle θ of the upper surface of the main body can be calculated by the trigonometric function: tanθ = △H / (L+D).

2. The angle verification platform according to claim 1, characterized in that, The main body has grooves at the middle of both sides of its transverse sides, and the grooves extend through the thickness of the main body. Multiple toothed portions are evenly arranged in the grooves along the thickness of the main body. An elongated toothed plate is fixed in the middle of the side of the end plate facing the main body. The toothed plate extends along the height of the end plate, and multiple biting teeth are evenly arranged along the height of the toothed plate on the side of the toothed plate facing the main body. The biting teeth are adapted to engage with the toothed portions.

3. The angle verification platform according to claim 1, characterized in that, The upper surface of the main body is provided with grid lines, which are recessed downwards and arranged in a crisscross pattern.

4. The angle verification platform according to claim 2, characterized in that, The toothed plate is fixedly mounted on the end plate by the first bolt.

5. The angle verification platform according to claim 4, characterized in that, The end plate has an embedding groove in the middle that is adapted to the toothed plate, and the toothed plate is embedded in the embedding groove and connected by the first bolt.

6. The angle verification platform according to claim 2, characterized in that, The main body and the end plate are detachably connected by a second bolt.

7. The angle verification platform according to claim 6, characterized in that, The main body has threaded holes on both sides of the groove, and the end plate has elongated holes parallel to the toothed plate on both sides of the toothed plate. The bolt passes through the elongated holes and is threadedly connected to the threaded holes.

8. The angle verification platform according to claim 7, characterized in that, A washer is provided between the bolt and the end plate.

9. The angle verification platform according to any one of claims 1 to 8, characterized in that, Both end plates are provided with cylindrical support columns at their lower ends. The support columns extend along the lower edge of their respective end plates, and the support columns enable the contact surface between the end plate and the horizontal support surface to be an arc surface.

10. The angle verification platform according to claim 9, characterized in that, The lower end of the end plate is provided with a semi-circular groove that is adapted to the support column. Part of the support column is inserted into the semi-circular groove and its bottom protrudes outside the end plate.

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