Spherical center measuring method for sphere structure on space truss in large-span building

Abstract

The invention relates to the technical field of sphere center measurement of a net rack sphere structure, and provides a sphere center measurement method for a sphere structure on a space net rack in a large-span building, and the method comprises the steps: building a measurement reference of a measurement instrument for measuring the sphere center of the net rack sphere structure; performing preliminary coarse positioning on the measuring instrument based on the outer contour of the sphere structure; adjusting the position of the measuring instrument to enable the projection of the sphere structure to be located in the center range of the measuring instrument, and finishing fine positioning of the measuring instrument; fixing the position of the measuring instrument, and determining the sphere center vertical line and the sphere center position of the sphere structure through the center of the measuring instrument. According to the sphere center measuring method for the sphere structure on the space truss in the large-span building, a composite measuring system of the transparent measuring scale, concentric circle scales and laser positioning is adopted, so that the sphere center measuring result of the sphere center structure is accurate, and the installation precision of the truss structure installed based on the sphere center structure is guaranteed; the quadrant fine tuning method provided by the invention can realize submillimeter positioning precision.

Description

Technical Field

[0001] The present invention relates to the technical field of measuring the center of a spherical structure on a grid, and in particular to a method for measuring the center of a spherical structure on a space grid in a large-span building. Background Art

[0002] In recent years, large-span buildings such as stadiums, stations, and airports have increasingly adopted space grid structures, typically composed of hollow spheres and steel pipes. During the installation of space grid structures, measuring the center of the hollow sphere is crucial for accurate installation. Traditional center measurement techniques, such as traditional 3D coordinate methods, mechanical fixtures, and laser projection, suffer from low efficiency, limited applicability, high costs, and complex on-site operations. Therefore, quickly and easily locating the center of the sphere to improve construction efficiency and accuracy is a pressing issue. Summary of the Invention

[0003] The purpose of the present invention is to solve at least one technical problem in the background technology and provide a method for measuring the center of a spherical structure on a space grid in a large-span building.

[0004] To achieve the above object, the present invention provides a method for measuring the center of a spherical structure on a space grid in a large-span building, comprising:

[0005] Establishing a measurement benchmark for measuring instruments used to measure the center of a spherical grid structure;

[0006] Perform preliminary rough positioning of the measuring instrument based on the outer contour of the spherical structure;

[0007] Adjust the position of the measuring instrument so that the projection of the spherical structure is located in the center range of the measuring instrument to complete the precise positioning of the measuring instrument;

[0008] The position of the measuring instrument is fixed, and the center perpendicular and center position of the spherical structure are determined through the center of the measuring instrument.

[0009] According to one aspect of the present invention, the measuring instrument comprises: a circular diameter ruler;

[0010] The circular diameter ruler is a square plate structure with a cross laser projection hole in the center. A plurality of circular rings are evenly spaced with the center as the center of the circle, and the diagonal lines are set as quadrant scale lines.

[0011] According to one aspect of the present invention, the circular diameter ruler is a square plate made of an optical grade transparent acrylic plate with a thickness of 6±0.2 mm and a light transmittance of ≥92%;

[0012] The aperture of the cross laser projection hole is 1 mm;

[0013] With its center as the center of the circle, multiple rings with a diameter of 300-1200mm are arranged at intervals of 50mm, and the line width of each ring is 0.1mm;

[0014] The scale range of the quadrant scale lines is 0-100 mm, and the graduation value is 1 mm.

[0015] According to one aspect of the present invention, the measuring instrument includes: an auxiliary positioning component;

[0016] The auxiliary positioning assembly includes: a magnetic base, a dual-axis bubble level and a laser;

[0017] The magnetic base magnetically supports the circular diameter ruler;

[0018] The dual-axis bubble level is arranged on the edge of the circular diameter ruler to measure the horizontal state of the circular diameter ruler;

[0019] The laser projects a vertical reference line onto the surface of the spherical structure through the cross laser projection hole.

[0020] According to one aspect of the present invention, the method of establishing a measurement benchmark for a measuring instrument for measuring the center of a sphere of a grid spherical structure includes:

[0021] Place a circular diameter ruler directly below the spherical structure to be measured, and adjust the circular diameter ruler to a horizontal state using the magnetic base and the dual-axis bubble level;

[0022] The laser is activated to project a vertical reference line onto the surface of the spherical structure through the cross laser projection hole.

[0023] According to one aspect of the present invention, performing preliminary coarse positioning of the measuring instrument based on the outer contour of the spherical structure includes:

[0024] Rotate the circular diameter ruler along the equatorial plane of the spherical structure, observe the matching degree between the outer contour of the spherical structure and each circular ring on the circular diameter ruler, and determine the target circular ring;

[0025] When the projected edge of the outer contour of the spherical structure is tangent to the target circle on the circle diameter ruler, the initial rough positioning is completed.

[0026] According to one aspect of the present invention, adjusting the position of the measuring instrument so that the projection of the spherical structure is located within the center range of the measuring instrument to complete the precise positioning of the measuring instrument includes:

[0027] Fine-tune the circle diameter ruler based on the positional relationship between the quadrant scale lines and the spherical structure:

[0028] Measure the distance difference between the projected edge of the outer contour of the spherical structure and the quadrant scales in each of the four quadrants formed by the quadrant scale lines;

[0029] Adjust the position of the circular diameter ruler so that the distance difference between the quadrant scales is within the preset threshold range, completing the precise positioning of the circular diameter ruler.

[0030] According to one aspect of the present invention, the position of the fixed measuring instrument is determined by the center of the measuring instrument to determine the center perpendicular line and the center position of the spherical structure, including:

[0031] Fix the position of the measuring instrument and project the laser vertically upwards through the cross laser projection hole. The vertical line where the laser is located is the projection position of the center of the spherical structure.

[0032] The center coordinates of the spherical structure are obtained based on the projection position of the center of the spherical structure.

[0033] According to one aspect of the present invention, a method for measuring the center of a spherical structure on a spatial grid in a large-span building includes: establishing a measurement datum for a measuring instrument used to measure the center of the spherical structure; performing preliminary coarse positioning of the measuring instrument based on the outer contour of the spherical structure; adjusting the position of the measuring instrument so that the projection of the spherical structure is within the center range of the measuring instrument to complete fine positioning of the measuring instrument; and fixing the position of the measuring instrument, and determining the perpendicular to the center of the spherical structure and the center position of the spherical structure using the center of the measuring instrument. This arrangement ensures that the positional accuracy between the spherical structure and the measuring instrument is ensured by first determining the measurement datum for the measuring instrument and then performing coarse and fine position adjustment of the measuring instrument based on the spherical structure. Once the positional accuracy of the measuring instrument is ensured, the center of the spherical structure can be determined based on the center of the measuring instrument. This simple and convenient measurement process effectively addresses the shortcomings of traditional measurement methods, such as low efficiency, limited application, high cost, and complex on-site operations. It can effectively improve construction efficiency and accuracy, and ensure the accuracy of center measurement.

[0034] According to one embodiment of the present invention, a measuring instrument comprises a circular ruler; the circular ruler is a square plate structure having a cross laser projection hole at its center. A plurality of circular rings are evenly spaced about the center of the circle, and the diagonals of the rings serve as quadrant scale lines. The circular ruler is made of an optical-grade transparent acrylic plate with a thickness of 6±0.2mm and a light transmittance of ≥92%. The cross laser projection hole 2 has a diameter of 1mm. A plurality of circular rings with diameters of 300-1200mm are spaced 50mm apart about the center of the circular ruler 1, each with a line width of 0.1mm. The quadrant scale has a scale range of 0-100mm, with a graduation value of 1mm. The measuring instrument includes: an auxiliary positioning component; the auxiliary positioning component includes: a magnetic base, a dual-axis bubble level and a laser; the magnetic base magnetically supports the circular diameter ruler; the dual-axis bubble level is set on the edge of the circular diameter ruler to measure the horizontal state of the circular diameter ruler; the laser projects the vertical reference line to the surface of the spherical structure through the cross laser projection hole. The magnetic base is a three-point magnetic base with adjustable magnetic support feet with an adjustment range of ±15°; the accuracy of the dual-axis bubble level is 0.02mm / m; the laser is a 650nm red laser with a power of <5mW. As set above, the measuring instrument of the present invention can be adapted to the measurement of spherical structures of multiple sizes, and can ensure the accuracy of the measurement, effectively improving the accuracy and efficiency of the center of the sphere measurement.

[0035] According to the solution of the present invention, the method for measuring the center of a spherical structure on a spatial grid in a large-span building provided by the present invention adopts a composite measurement system of a transparent ruler, a concentric circle scale and laser positioning, so that the result of the center measurement of the spherical center structure is accurate and correct, thereby ensuring the installation accuracy of the grid structure installed based on the spherical center structure; the method of quadrant fine-tuning proposed by the present invention can achieve submillimeter positioning accuracy; the method of the present invention has a wide range of applications and can be adapted to the general measurement of spheres of Φ300-1200mm; the present invention establishes a geometric projection positioning method that does not require complex calculations and can effectively improve measurement precision and accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 A flow chart schematically illustrates a method for measuring the center of a spherical structure on a space grid in a large-span building according to one embodiment of the present invention;

[0037] Figure 2 The figure schematically shows the structural arrangement of a circular diameter ruler according to one embodiment of the present invention. DETAILED DESCRIPTION

[0038] The present invention will now be discussed with reference to exemplary embodiments. It should be understood that the embodiments discussed are only intended to enable those skilled in the art to better understand and implement the present invention, rather than to imply any limitation on the scope of the present invention.

[0039] As used herein, the term "including" and variations thereof are to be interpreted as open-ended terms meaning "including, but not limited to." The term "based on" is to be interpreted as "based, at least in part, on." The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment."

[0040] Figure 1 The flowchart schematically shows a method for measuring the center of a spherical structure on a space grid in a large-span building according to an embodiment of the present invention. Figure 1 As shown, in this embodiment, the method for measuring the center of a spherical structure on a space grid in a large-span building includes:

[0041] Establishing a measurement benchmark for measuring instruments used to measure the center of a spherical grid structure;

[0042] Perform preliminary rough positioning of the measuring instrument based on the outer contour of the spherical structure;

[0043] Adjust the position of the measuring instrument so that the projection of the spherical structure is located in the center range of the measuring instrument to complete the precise positioning of the measuring instrument;

[0044] The position of the measuring instrument is fixed, and the center of the spherical structure is determined by the center of the measuring instrument. This arrangement ensures the positional accuracy between the spherical structure and the measuring instrument by first determining the measuring reference of the measuring instrument, and then performing coarse and fine adjustments to the position of the measuring instrument based on the spherical structure. After ensuring the positional accuracy of the measuring instrument, the center of the spherical structure can be determined based on the center of the measuring instrument. This simple and convenient measurement process can effectively solve the shortcomings of traditional measurement methods such as low efficiency, limited application, high cost, and complex on-site operation. It can effectively improve construction efficiency and construction accuracy, and ensure the accuracy of center measurement.

[0045] Further, Figure 2 The structural arrangement diagram of the circular diameter ruler according to one embodiment of the present invention is schematically shown. Figure 2 As shown, in this embodiment, the measuring instrument includes: a circular diameter ruler 1;

[0046] The circular diameter ruler 1 is a square plate structure with a cross laser projection hole 2 at its center. A plurality of circular rings 3 are evenly spaced with its center as the center of the circle, and its diagonal lines 4 are set as quadrant scale lines.

[0047] Furthermore, preferably, the circular diameter ruler 1 is a square plate made of an optical grade transparent acrylic plate with a thickness of 6±0.2 mm and a light transmittance of ≥92%;

[0048] The aperture of the cross laser projection hole 2 is 1 mm;

[0049] With the center of the circle ruler 1 as the center, multiple circular rings with a diameter of 300-1200 mm are arranged at intervals of 50 mm, and the line width of each circular ring is 0.1 mm;

[0050] The scale range of the quadrant scale lines is 0-100mm, and the graduation value is 1mm.

[0051] Further, according to one embodiment of the present invention, the measuring instrument includes: an auxiliary positioning component;

[0052] Auxiliary positioning components include: magnetic base, dual-axis bubble level and laser;

[0053] Magnetic base magnetically supports the circular diameter ruler;

[0054] The dual-axis bubble level is set on the edge of the circular diameter ruler to measure the horizontal state of the circular diameter ruler;

[0055] The laser projects a vertical reference line onto the surface of the spherical structure through a cross laser projection hole.

[0056] In this embodiment, the magnetic base is a three-point base with adjustable magnetic support feet within a ±15° adjustment range; the dual-axis bubble level has an accuracy of 0.02mm / m; and the laser is a 650nm red laser with a power of less than 5mW. This configuration enables the measuring instrument to measure spherical structures of various sizes while ensuring accurate measurement, effectively improving the precision and efficiency of sphere center measurement.

[0057] Furthermore, according to one embodiment of the present invention, establishing a measurement benchmark for a measuring instrument for measuring the center of a sphere of a grid spherical structure includes:

[0058] Place the circular diameter ruler directly below the spherical structure to be measured, and adjust the circular diameter ruler to a horizontal state (with the bubble centered) using the magnetic base and the dual-axis bubble level.

[0059] Activate the laser and project a vertical reference line onto the surface of the spherical structure through the cross laser projection hole.

[0060] Furthermore, according to one embodiment of the present invention, performing preliminary coarse positioning of the measuring instrument based on the outer contour of the spherical structure includes:

[0061] Rotate the circular diameter ruler along the equatorial plane of the spherical structure, observe the matching degree between the outer contour of the spherical structure and each circular ring on the circular diameter ruler, and determine the target circular ring;

[0062] When the projected edge of the outer contour of the spherical structure is tangent to the target circle (for example, a circle with a diameter of 500 mm) on the circle diameter ruler, the preliminary rough positioning is completed.

[0063] Furthermore, according to one embodiment of the present invention, adjusting the position of the measuring instrument so that the projection of the spherical structure is located within the center range of the measuring instrument to complete the precise positioning of the measuring instrument includes:

[0064] Fine-tune the circle diameter ruler based on the positional relationship between the quadrant scale lines and the spherical structure:

[0065] Measure the distance difference between the projected edge of the outer contour of the spherical structure and the quadrant scales in each of the four quadrants formed by the quadrant scale lines;

[0066] The position of the circular diameter ruler is adjusted so that the distance difference between the quadrant scales is within a preset threshold range (eg, ≤0.5 mm), thereby completing the precise positioning of the circular diameter ruler.

[0067] Furthermore, according to an embodiment of the present invention, the position of the measuring instrument is fixed, and the perpendicular line to the center of the spherical structure and the position of the center of the spherical structure are determined through the center of the measuring instrument, including:

[0068] Fix the position of the circular diameter ruler, and use the laser to project the laser vertically toward the spherical structure above through the cross laser projection hole. The vertical line where the laser is located is the projection position of the center of the spherical structure;

[0069] The spherical center coordinates of the spherical structure are obtained based on the projection position of the spherical center. In this embodiment, the 3D coordinates of the spherical center of the spherical structure can be obtained in conjunction with a total station.

[0070] According to the above-mentioned scheme of the present invention, the method for measuring the center of a spherical structure on a spatial grid in a large-span building provided by the present invention adopts a composite measurement system of a transparent ruler, a concentric circle scale and laser positioning, so that the result of the center of the spherical structure measurement is accurate and correct, thereby ensuring the installation accuracy of the grid structure installed based on the spherical center structure; the quadrant fine-tuning method proposed by the present invention can achieve submillimeter positioning accuracy; the method of the present invention has a wide range of applications and can be adapted to the general measurement of Φ300-1200mm spheres; the present invention establishes a geometric projection positioning method that does not require complex calculations, which can effectively improve measurement accuracy and precision.

[0071] The above description is merely a preferred embodiment of the present application and an illustration of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to the technical solutions formed by the specific combination of the above-mentioned technical features, but also encompasses other technical solutions formed by any combination of the above-mentioned technical features or their equivalents without departing from the inventive concept. For example, a technical solution formed by replacing the above-mentioned features with (but not limited to) technical features with similar functions disclosed in this application.

[0072] It should be understood that the size of the serial numbers of each step in the content of the invention and the implementation methods of the present invention does not absolutely mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the implementation methods of the present invention.

Claims

1. A method for measuring the center of a spherical structure on a space grid in a large-span building, characterized in that: include: Establishing a measurement benchmark for measuring instruments used to measure the center of a spherical grid structure; Perform preliminary rough positioning of the measuring instrument based on the outer contour of the spherical structure; Adjust the position of the measuring instrument so that the projection of the spherical structure is located in the center range of the measuring instrument to complete the precise positioning of the measuring instrument; The position of the measuring instrument is fixed, and the center perpendicular and center position of the spherical structure are determined through the center of the measuring instrument.

2. The method for measuring the center of a spherical structure on a space grid in a large-span building according to claim 1, characterized in that: The measuring instrument comprises: a circular diameter ruler; The circular diameter ruler is a square plate structure with a cross laser projection hole in the center. A plurality of circular rings are evenly spaced with the center as the center of the circle, and the diagonal lines are set as quadrant scale lines.

3. The method for measuring the center of a spherical structure on a space grid in a large-span building according to claim 2, characterized in that: The circular diameter ruler is a square plate made of optical grade transparent acrylic plate with a thickness of 6±0.2mm and a light transmittance of ≥92%; The aperture of the cross laser projection hole is 1 mm; With its center as the center of the circle, multiple rings with a diameter of 300-1200mm are arranged at intervals of 50mm, and the line width of each ring is 0.1mm; The scale range of the quadrant scale lines is 0-100 mm, and the graduation value is 1 mm.

4. The method for measuring the center of a spherical structure on a space grid in a large-span building according to claim 3, characterized in that: The measuring instrument includes: an auxiliary positioning component; The auxiliary positioning assembly includes: a magnetic base, a dual-axis bubble level and a laser; The magnetic base magnetically supports the circular diameter ruler; The dual-axis bubble level is arranged on the edge of the circular diameter ruler to measure the horizontal state of the circular diameter ruler; The laser projects a vertical reference line onto the surface of the spherical structure through the cross laser projection hole.

5. The method for measuring the center of a spherical structure on a space grid in a large-span building according to claim 4, characterized in that: The method of establishing a measurement benchmark for a measuring instrument for measuring the center of a sphere of a grid spherical structure includes: Place a circular diameter ruler directly below the spherical structure to be measured, and adjust the circular diameter ruler to a horizontal state using the magnetic base and the dual-axis bubble level; The laser is activated to project a vertical reference line onto the surface of the spherical structure through the cross laser projection hole.

6. The method for measuring the center of a spherical structure on a space grid in a large-span building according to claim 5, characterized in that: The preliminary rough positioning of the measuring instrument based on the outer contour of the spherical structure includes: Rotate the circular diameter ruler along the equatorial plane of the spherical structure, observe the matching degree between the outer contour of the spherical structure and each circular ring on the circular diameter ruler, and determine the target circular ring; When the projected edge of the outer contour of the spherical structure is tangent to the target circle on the circle diameter ruler, the initial rough positioning is completed.

7. The method for measuring the center of a spherical structure on a space grid in a large-span building according to claim 6, characterized in that: The step of adjusting the position of the measuring instrument so that the projection of the spherical structure is located within the center range of the measuring instrument and completing the precise positioning of the measuring instrument includes: Fine-tune the circle diameter ruler based on the positional relationship between the quadrant scale lines and the spherical structure: Measure the distance difference between the projected edge of the outer contour of the spherical structure and the quadrant scales in each of the four quadrants formed by the quadrant scale lines; Adjust the position of the circular diameter ruler so that the distance difference between the quadrant scales is within the preset threshold range, completing the precise positioning of the circular diameter ruler.

8. The method for measuring the center of a spherical structure on a space grid in a large-span building according to any one of claims 2 to 7, characterized in that: The fixing of the position of the measuring instrument and determining the center perpendicular and the center position of the spherical structure through the center of the measuring instrument include: Fix the position of the circular diameter ruler, and use the laser to project the laser vertically upwards through the cross laser projection hole. The vertical line where the laser is located is the projection position of the center of the spherical structure; The center coordinates of the spherical structure are obtained based on the projection position of the center of the spherical structure.

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