A device and method for measuring three-dimensional coordinates of the center of a circular tube

Abstract

A device for measuring the three-dimensional coordinates of the center of a circular tube is used for measuring the center coordinates of the circular tube, comprising a positioning angle frame and a prism assembly which is adjustable and arranged on the positioning angle frame, wherein the prism assembly comprises an upper prism and a lower prism which are arranged at intervals in an upper and lower direction, and the central axes of the upper prism and the lower prism are arranged coaxially. When the present invention measures a cableway tube, since it is arranged outside the circular tube, the center of the circular tube is indirectly measured, that is, it can be used at the tube mouth or in the middle of the tube, and the flexibility of the axis measurement point selection is greater and the range is wider; since the present invention adopts an external clamping method to determine the prism position and does not adopt a bubble leveling method, the operation is flexible and simple.

Description

Technical Field

[0001] The invention relates to the field of bridge segment beam prefabrication, and in particular to a device for measuring the three-dimensional coordinates of the center of a circular tube and a use method thereof. Background Art

[0002] In bridge construction, the positioning of the cableway pipe on the tower beam of a cable-stayed bridge is a construction measurement work that requires high spatial position accuracy. The cableway pipe generally has a large inclination angle. The current measurement method mainly uses auxiliary tools to calibrate the position of the center point from the circular tube, and then directly sets a prism at the center point to perform three-dimensional coordinate measurement. The characteristics of this method are that the prism needs to be placed at the exit position, the measured center of the circle is mainly concentrated at the pipe mouth, and the prism needs to be leveled with bubbles during measurement. The operation steps are complicated and the measurement accuracy is not high. Summary of the invention

[0003] The purpose of the present invention is to solve the technical defects of the prior art in that the process of positioning a cableway tube on a tower beam of a cable-stayed bridge has complicated operation steps and low measurement accuracy.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0005] A device for measuring the three-dimensional coordinates of the center of a circular tube is used to measure the coordinates of the center of the circular tube, comprising a positioning angle bracket and a prism assembly which is adjustable and arranged on the positioning angle bracket. The prism assembly comprises an upper prism and a lower prism which are arranged at intervals in an upper and lower direction, and the central axes of the upper prism and the lower prism are coaxially arranged.

[0006] Furthermore, the positioning angle frame includes a front positioning angle frame and a rear positioning angle frame arranged in parallel, and a connecting rod connecting the front positioning angle frame and the rear positioning angle frame. The front positioning angle frame and the rear positioning angle frame each include a horizontal frame and a vertical frame, and the horizontal frame and the vertical frame form a right-angle structure.

[0007] Furthermore, a slide groove is arranged upward in the notch direction on the cross frame of the front positioning angle frame, and the prism assembly is slidably connected to the slide groove.

[0008] Furthermore, the prism assembly also includes a lower prism rod and an upper prism rod, a lower prism frame is arranged between the lower prism rod and the upper prism rod, the lower prism is rotatably arranged in the lower prism frame, an upper prism frame is arranged on the top of the upper prism rod, the upper prism is rotatably arranged in the upper prism frame, and the axes of the lower prism rod and the upper prism rod are coaxially arranged with the central axes of the upper prism and the lower prism.

[0009] Furthermore, a threaded connection hole is provided at the bottom of the lower prism rod, and a fixing bolt is slidably provided in the slide groove. The lower prism rod is fixed to the fixing bolt through the threaded connection hole, so that the lower prism rod and the cross frame are vertically fixed to each other.

[0010] Furthermore, the distance between the upper prism and the lower prism is 300 mm, and the distance between the lower prism and the tangent point of the circular tube is 150 mm.

[0011] A measuring method for a device for measuring the three-dimensional coordinates of the center of a circular tube comprises the following steps:

[0012] S1: Measure the outer radius R of the circular tube to be measured, use the slide groove on the horizontal frame to adjust the distance between the center axis of the lower prism rod and the edge of the vertical frame to be equal to the radius R, and lock the prism assembly;

[0013] S2: Place the vertical frames of the front positioning angle frame and the rear positioning angle frame closely against the outer wall of the round tube, and adjust the positioning angle frame along the longitudinal direction of the round tube so that the clamping section of the front positioning angle frame is parallel to the section of the round tube to be measured;

[0014] S3: Use the total station to measure the 3D coordinates of the upper prism and the lower prism in turn, and obtain the 3D coordinate values ​​of the center of the upper prism (X1, Y1, Z1) and the 3D coordinate values ​​of the center of the lower prism (X2, Y2, Z2); the distance between the two prisms is 300mm

[0015] S4: Assuming that the center coordinates of the circular tube (15) to be measured are (X3, Y3, Z3), the distance between the two prisms is 300 mm, the distance between the lower prism and the tangent point of the circular tube is 150 mm, and the outer diameter of the circular tube is R, the following equation is obtained:

[0016]

[0017] Among them, (X3, Y3, Z3) is an unknown point, and the rest are known points. After transforming the above formula, we can get the calculation formula:

[0018]

[0019]

[0020]

[0021] Thus, the three-dimensional coordinates of the center of the circle at the position to be measured can be obtained.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] When measuring the ropeway pipe, the present invention is arranged outside the round pipe, and indirectly measures the center of the round pipe, that is, it can be used at the pipe mouth or in the middle of the pipe, and the flexibility of the axis measurement point selection is large and the range is wider; since the present invention adopts an external clamping method to determine the prism position, and does not adopt a bubble leveling method, the operation is flexible and simple, but since it is necessary to deduce the center coordinates according to the geometric relationship, programming calculation can be used, and one more step of calculation operation is required BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0025] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0026] Figure 2 It is a side view structural schematic diagram of the present invention;

[0027] Figure 3 It is a schematic diagram of the top view structure of the present invention;

[0028] Figure 4 It is a schematic diagram of the structure of the prism assembly of the present invention;

[0029] Figure 5 It is a schematic diagram of the cross frame structure of the present invention.

[0030] In the figure: 1. positioning angle bracket, 2. front positioning angle bracket, 3. rear positioning angle bracket, 4. connecting rod, 5. horizontal bracket, 6. vertical bracket, 7. lower prism rod, 8. lower prism frame, 9. lower prism, 10. upper prism rod, 11. upper prism frame, 12. upper prism, 13. fixing bolt, 14. slide groove, 15. round tube. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] like Figure 1-5As shown, a device for measuring the three-dimensional coordinates of the center of a circular tube is used to measure the center coordinates of a circular tube 15, including a positioning angle bracket 1, and a prism assembly with an adjustable position set on the positioning angle bracket 1, the prism assembly includes an upper prism 12 and a lower prism 9 arranged at an interval in an upper and lower direction, and the central axes of the upper prism 12 and the lower prism 9 are coaxially arranged.

[0033] Specifically, as shown in the figure, the positioning angle frame 1 includes a front positioning angle frame 2 and a rear positioning angle frame 3 arranged in parallel, and a connecting rod 4 connecting the front positioning angle frame 2 and the rear positioning angle frame 3, and the front positioning angle frame 2 and the rear positioning angle frame 3 each include a horizontal frame 5 and a vertical frame 6, and the horizontal frame 5 and the vertical frame 6 form a right-angle structure.

[0034] Specifically, as shown in the figure, a slide groove 14 is arranged upward in the notch direction on the cross frame 5 of the front positioning angle frame 2, and the prism assembly is slidably connected to the slide groove 14.

[0035] Specifically, as shown in the figure, the prism assembly also includes a lower prism rod 7 and an upper prism rod 10, a lower prism frame 8 is arranged between the lower prism rod 7 and the upper prism rod 10, the lower prism 9 is rotatably arranged in the lower prism frame 8, an upper prism frame 11 is arranged on the top of the upper prism rod 10, the upper prism 12 is rotatably arranged in the upper prism frame 11, and the axes of the lower prism rod 7 and the upper prism rod 10 are coaxially arranged with the central axes of the upper prism 12 and the lower prism 9.

[0036] Specifically, as shown in the figure, a threaded connection hole is provided at the bottom of the lower prism rod 7, and a fixing bolt 13 is slidably provided in the slide groove 14. The lower prism rod 7 is fixed to the fixing bolt 13 through the threaded connection hole, so that the lower prism rod 7 and the cross frame 5 are vertically fixed to each other.

[0037] Specifically, as shown in the figure, the distance between the upper prism 12 and the lower prism 9 is 300 mm, and the distance between the tangent point of the lower prism 9 and the circular tube 15 is 150 mm.

[0038] 7. A method for measuring the three-dimensional coordinates of the center of a circular tube, comprising the following steps:

[0039] S1: Measure the outer radius R of the circular tube to be measured, use the slide groove on the horizontal frame 5 to adjust the distance between the center axis of the lower prism rod 7 and the edge of the vertical frame 6 to be equal to the radius R, and lock the prism assembly;

[0040] S2: The vertical frames 6 of the front positioning angle frame and the rear positioning angle frame are closely attached to the outer wall of the round tube, and the positioning angle frames are adjusted along the longitudinal direction of the round tube so that the clamping section of the front positioning angle frame is parallel to the section of the round tube to be measured;

[0041] S3: Use a total station to measure the three-dimensional coordinates of the upper prism 12 and the lower prism 9 in turn, and obtain the three-dimensional coordinate values ​​of the center of the upper prism (X1, Y1, Z1) and the three-dimensional coordinate values ​​of the center of the lower prism (X2, Y2, Z2); the distance between the two prisms is 300mm

[0042] S4: Assuming that the center coordinates of the circular tube 15 to be measured are (X3, Y3, Z3), the distance between the two prisms is 300 mm, the distance between the tangent points of the lower prism 9 and the circular tube 15 is 150 mm, and the outer diameter of the circular tube is R, the following equation is obtained:

[0043]

[0044] Among them, (X3, Y3, Z3) is an unknown point, and the rest are known points. After transforming the above formula, we can get the calculation formula:

[0045]

[0046]

[0047]

[0048] Thus, the three-dimensional coordinates of the center of the circle at the position to be measured can be obtained.

[0049] When measuring the ropeway pipe, the present invention is arranged outside the round pipe, and indirectly measures the center of the round pipe, that is, it can be used at the pipe mouth or in the middle of the pipe, and the flexibility of the axis measurement point selection is large and the range is wider; since the present invention adopts an external clamping method to determine the prism position, and does not adopt a bubble leveling method, the operation is flexible and simple, but since it is necessary to deduce the center coordinates according to the geometric relationship, programming calculation can be used, and one more step of calculation operation is required

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

[0051] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A measuring method for a device for measuring the three-dimensional coordinates of the center of a circular tube, characterized in that: The device for measuring the three-dimensional coordinates of the center of the circular tube includes: A positioning angle frame (1), and a prism assembly which is adjustable and arranged on the positioning angle frame (1), wherein the prism assembly comprises an upper prism (12) and a lower prism (9) which are arranged in an upper and lower orientation at intervals, and the central axes of the upper prism (12) and the lower prism (9) are coaxially arranged; The positioning angle frame (1) comprises a front positioning angle frame (2) and a rear positioning angle frame (3) which are arranged in parallel, and a connecting rod (4) connecting the front positioning angle frame (2) and the rear positioning angle frame (3); the front positioning angle frame (2) and the rear positioning angle frame (3) each comprise a horizontal frame (5) and a vertical frame (6); the horizontal frame (5) and the vertical frame (6) form a right-angle structure; The measurement method includes the following steps: S1: Measure the outer radius R of the circular tube to be measured, use the slide groove on the horizontal frame (5) to adjust the distance between the center axis of the lower prism rod (7) and the edge of the vertical frame (6) to be equal to the radius R, and lock the prism assembly; S2: The vertical frames (6) of the front positioning angle frame and the rear positioning angle frame are closely attached to the outer wall of the circular tube, and the positioning angle frames are adjusted along the longitudinal direction of the circular tube so that the clamping section of the front positioning angle frame is parallel to the section of the circular tube to be measured; S3: Use a total station to measure the three-dimensional coordinates of the upper prism (12) and the lower prism (9) in sequence, and obtain the three-dimensional coordinate values ​​(X1, Y1, Z1) of the center of the upper prism and the three-dimensional coordinate values ​​(X2, Y2, Z2) of the center of the lower prism; the distance between the two prisms is 300 mm; S4: Assuming that the center coordinates of the circular tube (15) to be measured are (X3, Y3, Z3), the distance between the two prisms is 300 mm, the distance between the tangent points of the lower prism (9) and the circular tube (15) is 150 mm, and the outer diameter of the circular tube is R, the following equation is obtained: Among them, (X3, Y3, Z3) is an unknown point, and the rest are known points. After transforming the above formula, we can get the calculation formula: Thus, the three-dimensional coordinates of the center of the circle at the position to be measured can be obtained.

2. The measuring method of the device for measuring the three-dimensional coordinates of the center of a circular tube according to claim 1, characterized in that: The cross frame (5) of the front positioning angle frame (2) is provided with a slide groove (14) which is arranged upward in the notch direction, and the prism assembly is slidably connected to the slide groove (14).

3. The measuring method of the device for measuring the three-dimensional coordinates of the center of a circular tube according to claim 2, characterized in that: The prism assembly further comprises a lower prism rod (7) and an upper prism rod (10); a lower prism frame (8) is arranged between the lower prism rod (7) and the upper prism rod (10); the lower prism (9) is rotatably arranged in the lower prism frame (8); an upper prism frame (11) is arranged on the top of the upper prism rod (10); the upper prism (12) is rotatably arranged in the upper prism frame (11); and the axes of the lower prism rod (7) and the upper prism rod (10) are coaxially arranged with the central axes of the upper prism (12) and the lower prism (9).

4. The measuring method of the device for measuring the three-dimensional coordinates of the center of a circular tube according to claim 3, characterized in that: A threaded connection hole is provided at the bottom of the lower prism rod (7), a fixing bolt (13) is slidably provided in the slide groove (14), and the lower prism rod (7) and the fixing bolt (13) are fixed to each other through the threaded connection hole, so that the lower prism rod (7) and the cross frame (5) are fixed to each other vertically.

5. The measuring method of the device for measuring the three-dimensional coordinates of the center of a circular tube according to claim 4, characterized in that: The distance between the upper prism (12) and the lower prism (9) is 300 mm, and the distance between the tangent point of the lower prism (9) and the circular tube (915) is 150 mm.

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