A high-precision detection and installation method for special pipe space three-dimensional angle transformation

Abstract

A kind of special pipe space three-dimensional angle conversion high-precision detection installation method, by using laser total station, a unified height circular position line is surveyed in advance in pipe, and according to the assembly line, surveyed Mi type position line;Using solidworks software, according to the numerical value of manufacturer, three-dimensional modeling is carried out, and the three-dimensional original coordinates of each point of Mi type position line on the unified height position are extracted, the deflection angle is moved in the software, the three-dimensional coordinate data after deflection is viewed, and is recorded;In the installation of actual ship, according to the three-dimensional coordinate data of each point provided, only three point data needs to be detected, then the data is input into solidworks software, the actual deflection angle data can be viewed.The design of the detection method solves the problem of needing the help of external factory technology in the installation of actual ship, avoids the waste of a large amount of waiting time and the extension of installation construction, and reduces the construction cost.

Description

Technical Field

[0001] This invention belongs to the field of marine shipbuilding and design, and specifically relates to a high-precision detection and installation method for three-dimensional angle transformation of a special circular tube space. Background Technology

[0002] In the construction of specialized marine engineering vessels, special circular tubes are installed overboard. The theoretical positions of these tubes exhibit certain deflection angles in both the horizontal and vertical directions, demanding extremely high precision in installation data. The precise control of the installation angles of the overboard tubes relative to the ship's midline, as well as the tolerance range, places extremely stringent requirements on the construction process. The main challenges are: 1. The allowable deviation within the vector range is very small; a single point in space is only allowed a deviation of 0.5° within the vector range, and no corresponding fixed points are provided for positioning and installation. 2. Marking is difficult because the entire assembly line is not initially provided for the tube. Therefore, installation must be based on the spatial center position of the tube on-site. However, during actual ship installation, structural markers are not allowed to be installed inside the tube, making it impossible to determine the exact center position. 3. Special circular tubes exhibit deflection angles in the horizontal, vertical, and height directions during actual ship installation. Total stations cannot accurately measure the precise coordinates of their centers. Therefore, before installation, construction personnel must re-survey the assembly lines and intersections of the circular tubes, then calculate the three-dimensional data of the assembly lines and intersections. This three-dimensional data is then sent to the manufacturer for specific deflection angle calculations, and finally fed back to the on-site construction personnel for installation. This process prolongs the construction cycle, wastes a significant amount of cost, and is not conducive to the rapid positioning of special circular tubes outside the ship. Summary of the Invention

[0003] To address the aforementioned problems, this invention provides a high-precision detection and installation method for the three-dimensional angle transformation of special circular tubes in space. The aim is to achieve rapid mounting and positioning of special circular tubes outside the ship, and to complete high-precision detection of deflection angles without relying on external manufacturers' technical assistance. The technical solution adopted is as follows:

[0004] A high-precision detection and installation method for three-dimensional angle transformation of a special circular tube is proposed. The circular tube is installed outside the ship's hull and is deflected at an angle of 44° in the horizontal direction and 8° in the vertical direction with the spatial center point of the design value as the reference axis. The vector range deviation is 0.5°.

[0005] The specific monitoring and installation steps are as follows:

[0006] S1: Place the circular tube horizontally on the site. Using a laser total station, install three reference points A, B, and C on the outer surface of the tube, ensuring that the three reference points A, B, and C are on the same horizontal line. On the other side of the tube, symmetrical to reference point A, install reference point A', and adjust A and A' to be on the same horizontal line.

[0007] Using external assembly reference points A and B of the circular tube as references, a three-dimensional accuracy test is performed on any three points D, E, and D' at the upper end of the circular tube. The test checks whether any points D, E, and D' at the upper end of the circular tube are on the same data plane. The distance data between points D, E, and D' and the external assembly reference point C is measured, and it is checked whether the distance to the external assembly reference point C meets the design data standard. If it does not meet the standard, the three points at the upper end are adjusted according to the measured distance data so that the distance between the upper end data and point C meets the design standard and the three points at the upper end are on the same data plane.

[0008] S2: Using a laser total station, establish a station with reference points A and B on the outside of the circular tube as references. Measure the three-dimensional data of the uniform height point inside the circular tube from the upper end. Based on the measured three-dimensional data, accurately delineate eight coordinate reference points D, E, and D' from the uniform height point inside the circular tube, forming eight marker points, namely C1 / C2 / C3 / C4 / C5 / C6 / C7 / C8. Mark the points using a trowel, and pre-place reflective targets on marker points C8 / C1 / C2 / C3. The reflective targets are then pasted inside the circular tube.

[0009] S3: Using SolidWorks software, a 3D model is created based on the design data of the circular tube, and the coordinates of the deflection axis center point required by the design are generated based on the uniform height value of the distance from the upper end of the circular tube as pre-marked.

[0010] S4: Using SolidWorks software, the tube is deflected vertically and horizontally using the generated deflection axis center coordinates as the reference axis. The three-dimensional coordinate data of the eight marker points after the angle deflection are viewed and recorded one by one.

[0011] S5: Input the generated coordinates of the deflection axis center point and the three-dimensional coordinates of the marker point into the three-dimensional data analysis software, and use the point movement function to transform the coordinate data of the reference center point into the design theoretical data. The three-dimensional coordinate data of the marker point will then be transformed into the actual ship measurement reference data, and the data will be recorded.

[0012] S6: During the actual shipboard installation phase, a laser total station is used to establish a station at reference points G and H on the side of the ship. Three-dimensional data measurements are performed on the pre-set reflective target inside the circular tube, and the data is matched one by one with the recorded coordinate points to perform the installation and positioning.

[0013] S7: After installation, the three-dimensional coordinate data of the marker points inside the structure are accurately measured. The measured data is then input into the computer software model. After adjustments are made based on the measured data, the vertical and horizontal deflection angles can be calculated and displayed within the software.

[0014] S8: Input the measured values ​​into the formula table to calculate the vector precision data. The calculation formula is as follows:

[0015] Acos [cos(D)×cos(D+B)+sin(D)×sin(D+B)×cos(A)].

[0016] S9: After welding the round tube, repeat steps S6~S8 above to complete the rapid and high-precision inspection.

[0017] Furthermore, in the above-mentioned high-precision detection and installation method for three-dimensional angle transformation of a special circular tube, the lower end of the circular tube is flared, and during installation, the opening of the upper end faces upward and the opening of the lower end faces downward.

[0018] Furthermore, the aforementioned high-precision detection and installation method for three-dimensional angle transformation in a special circular tube space further includes datum points A and A' being located near the upper port.

[0019] Furthermore, in the above-mentioned high-precision detection and installation method for three-dimensional angle transformation of a special circular tube, the reference points B and B' are closer to the lower port.

[0020] Furthermore, in step S6, the three-dimensional data measurement of the pre-set reflective target inside the circular tube is performed. Only 2-3 points of the data need to be measured and matched one-to-one with the recorded coordinate data.

[0021] Furthermore, the above-mentioned high-precision detection and installation method for three-dimensional angle transformation of a special circular tube further involves placing the circular tube horizontally and supporting it on the ground using a jig.

[0022] This invention's detection method utilizes the combination of software and a laser total station. The software extracts the three-dimensional coordinate data of the corresponding detection points, while the laser total station leverages its data feedback advantage to quickly obtain the three-dimensional data of the measured position during detection. This data is then input back into the software to quickly obtain the deflection angle data in the vertical and horizontal directions. To achieve rapid mounting and positioning of special circular tubes on the outer side of the ship, and to complete high-precision detection of the deflection angle without relying on external technical assistance, this invention uses a laser total station to pre-mark circular position lines at a uniform height inside the circular tube, and marks eight marker points according to the assembly line. Using SolidWorks software, a three-dimensional model is created based on the manufacturer's values, and the three-dimensional coordinate data of each marker point at the uniform height is extracted. The deflection angle is then moved within the software, and the resulting three-dimensional coordinate data is viewed and recorded. During actual ship installation, based on the provided three-dimensional coordinate data, only three points need to be detected. This data is then input into SolidWorks software to view the actual deflection angle data. This method solves the problem of relying on external technical assistance during actual ship installation, avoiding significant waiting time, reducing installation time, and lowering construction costs.

[0023] This method is convenient and quick to use, has high detection accuracy, and wide applicability. The detection data during positioning is more intuitive and reliable, and the effect is good. It can effectively improve accuracy and efficiency during construction, eliminate the need for external manufacturers, and save a lot of construction costs and time. Attached Figure Description

[0024] Figure 1 This is a schematic flowchart of the present invention.

[0025] Figure 2 This is a diagram of a circular pipe installation.

[0026] Figure 3 This is a diagram of a circular pipe inspection.

[0027] Figure 4 It is a line drawing of the interior of a cylindrical structure.

[0028] Figure 5 This is a diagram showing the markings inside a circular tube.

[0029] Figure 6 It is a software application diagram.

[0030] Figure 7 It is a coordinate-generated graph.

[0031] Figure 8 The effect of the round pipe installation process Figure 1 .

[0032] Figure 9 The effect of the round pipe installation process Figure 1 . Detailed Implementation

[0033] The present invention will be described in detail with reference to specific embodiments.

[0034] like Figure 1 The method described is a high-precision detection and installation method for three-dimensional angle transformation in a special circular tube. Based on the combination of SolidWorks software and a laser total station, the method involves pre-marking uniform height points inside the circular tube, using SolidWorks software to create a three-dimensional model and extract the three-dimensional coordinate data of the deflection angle for different specifications, and using the total station to measure the data at the location points. The actual measured three-dimensional coordinate data is then input into the SolidWorks software to view the actual deflection angle value.

[0035] 1) such as Figure 1 As shown, the installation and high-precision testing of this special round pipe are carried out according to the construction process.

[0036] 2) such as Figure 2 As shown, this special circular tube needs to be installed outside the ship's hull, and deflected at an angle of 44° in the horizontal direction and 8° in the vertical direction with the design spatial center point of a fixed value as the reference axis. Only a deviation of 0.5° is allowed within the vector range.

[0037] 3) such as Figure 3 As shown, the circular tube is placed on the site. Using a laser total station, the external assembly reference points A, B, C, and A' of the circular tube are adjusted to be at the same level. After the leveling adjustment, a station is established using the external assembly reference points A and B of the circular tube as references. Three-dimensional accuracy testing is performed on any three points on the upper end of the structure to check whether any points D, E, and D' on the upper end of the structure are on the same data plane, and to check whether the distance from the external assembly reference point C meets the design data standard. Based on the measurement data, the upper end is adjusted so that the distance from the upper end data point to point C meets the design standard, and the upper ends are on the same data plane.

[0038] 4) such as Figure 4 As shown, using a laser total station, a station was established with reference points A and B on the outside of the circular tube. The three-dimensional data of the internal heights D, E, and D' of the circular tube from the upper end were measured. Based on the measurement data, eight coordinate reference points (such as...) were accurately delineated. Figure 5 As shown in the figure, eight marker points C1 / C2 / C3 / C4 / C5 / C6 / C7 / C8 are formed respectively. The markers are made using a stencil, and reflective targets are placed on the marker points C8 / C1 / C2 / C3 in advance.

[0039] 5) such as Figure 6As shown, using SolidWorks software, a 3D model is created based on the design data of the special circular tube. The coordinates of the marker points are generated based on the uniform height value of the distance from the upper port of the special circular tube pre-marked. Then, the coordinates of the center point of the deflection axis required by the design are generated.

[0040] 6) For example Figure 7 As shown, using SolidWorks software, the circular tube is deflected vertically and horizontally with the generated center coordinate point as the reference axis. The three-dimensional coordinate data of the eight marked points after the angle deflection are viewed and recorded one by one.

[0041] 7) Input the generated three-dimensional coordinate data of the reference center point and the marker point into the three-dimensional data analysis software, and use the point movement function to transform the coordinate data of the reference center point into the design theoretical data. The three-dimensional coordinate data of the marker point will then be transformed into the actual ship measurement reference data, and the data will be recorded.

[0042] 8) For example Figure 8 , Figure 9 As shown, during the actual ship installation phase, a laser total station is used to establish a station at reference points G and H on the side of the ship. Three-dimensional data measurement is performed on the pre-set reflective target inside the special circular tube. Only the data of 2-3 points (C8 / C1 / C2 / C3) need to be detected and matched one by one with the recorded coordinate point data for installation positioning.

[0043] 9) After the installation is completed, the data is measured precisely and then input into the computer software model. After adjustments are made based on the data, the vertical and horizontal deflection angles can be calculated and displayed within the software.

[0044] 10) Input the measured values ​​into the formula table to calculate the vector precision data. The calculation formula is as follows:

[0045] Acos [cos(D)×cos(D+B)+sin(D)×sin(D+B)×cos(A)].

[0046] 11) After welding the special round tube, repeat steps 8), 9) and 10) above to complete the rapid and high-precision inspection.

Claims

1. A high-precision detection and installation method for three-dimensional angle transformation of a special circular tube, characterized in that, The circular tube is installed outside the ship's hull, with the spatial center point of the design value as the reference axis, and is deflected at an angle of 44.0° in the horizontal direction and 8° in the vertical direction, with a vector range deviation of 0.5°; The specific testing and installation steps are as follows: S1: Place the circular tube horizontally on the site. Using a laser total station, install three reference points A, B, and C on the outer surface of the circular tube. The three reference points A, B, and C are located on the same horizontal line. On the other side of the circular tube, symmetrical to reference point A, install reference point A' and adjust A and A' to be on the same horizontal line. Using the external assembly reference points A and B of the circular tube as reference points, a three-dimensional accuracy test is performed on any three points D, E, and D' at the upper end of the circular tube. The test checks whether any points D, E, and D' at the upper end of the circular tube are on the same data plane. The distance data between points D, E, and D' and the external assembly reference point C is measured, and it is checked whether the distance to the external assembly reference point C meets the design data standard tolerance of ±3mm. If it does not meet the requirement, the three points at the upper end are adjusted according to the measured distance data so that the distance between the three points at the upper end and point C meets the design standard and the three points at the upper end are on the same data plane. S2: Using a laser total station, establish a station with reference points A and B on the outside of the circular tube as references. Measure the three-dimensional data of any position inside the circular tube at a uniform height point D, E, D' from the upper end. Based on the measured three-dimensional data, accurately delineate eight coordinate reference points at a uniform height point D, E, D' inside the circular tube, forming eight marker points, namely C1 / C2 / C3 / C4 / C5 / C6 / C7 / C8. Mark the points using a trowel, and pre-place reflective targets on marker points C8 / C1 / C2 / C3. The reflective targets are then pasted inside the circular tube. S3: Using SolidWorks software, a 3D model is created based on the design data of the circular tube, and the coordinates of the deflection axis center point required by the design are generated based on the uniform height value of the distance from the upper end of the circular tube pre-marked. S4: Using SolidWorks software, the tube is deflected vertically and horizontally with the generated deflection axis center coordinate point as the reference axis, and the three-dimensional coordinate data of the eight marker points after the angle deflection is viewed and recorded one by one. S5: Input the generated coordinates of the deflection axis center point and the three-dimensional coordinates of the marker point into the three-dimensional data analysis software, and use the point movement function to transform the coordinate data of the reference center point into the design theoretical data. Then the three-dimensional coordinate data of the marker point will also be transformed into the actual ship measurement reference data, and the data will be recorded. S6: During the actual ship installation phase, a laser total station is used to establish a station at reference points G and H on the side of the ship. Three-dimensional data is measured on the pre-set reflective target inside the circular tube, and the data is matched one by one with the recorded coordinate points to perform the installation positioning. S7: After the installation is completed, the three-dimensional coordinate data of the marked points inside the tube are accurately measured. The measured data is then input into the computer software model. After adjustments are made based on the measured data, the vertical and horizontal deflection angles can be calculated and displayed within the software. S8: Input the measured values ​​into the formula table to calculate the vector precision data. The calculation formula is as follows: Acos[cos(D)×cos(D+B)+sin(D)×sin(D+B)×cos(A)】; S9: After welding the round tube, repeat steps S6~S8 above to complete the rapid and high-precision inspection.

2. The high-precision detection and installation method for three-dimensional angle transformation of a special circular tube according to claim 1, characterized in that, The lower end of the round tube is flared. During installation, the opening of the upper end faces upward and the opening of the lower end faces downward.

3. The high-precision detection and installation method for three-dimensional angle transformation of a special circular tube according to claim 1, characterized in that, Reference points A and A' are close to the upper port.

4. The high-precision detection and installation method for three-dimensional angle transformation of a special circular tube according to claim 1, characterized in that, Reference points B and B' are close to the lower port.

5. The high-precision detection and installation method for three-dimensional angle transformation of a special circular tube according to claim 1, characterized in that, In step S6, three-dimensional data measurement is performed on the pre-set reflective target inside the circular tube. Only 2-3 points need to be measured and matched one-to-one with the recorded coordinate data.

6. The high-precision detection and installation method for three-dimensional angle transformation of a special circular tube according to claim 1, characterized in that, The round tube is placed horizontally and supported on the ground by a frame.

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