CAD-based pipe center elevation line generation method

Abstract

The invention discloses a CAD-based pipe center elevation line generation method. The method comprises the following steps: obtaining basic data along a pipeline through field survey; inputting the basic data along the pipeline into EXCEL to form surveying and mapping data; preprocessing a remark column for forming surveying and mapping data in the EXCEL; importing the preprocessed surveying and mapping data into a pipe center elevation line generation system; generating a pipe center elevation line through a pipe center elevation line generation system; and calculating the coordinates of the pipeline center elevation line according to the pipeline center elevation line. The problems that an existing pipe center elevation line generation method lacks an automatic generation function and is poor in pipe center elevation line drawing efficiency are solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of pipeline network visualization, and in particular relates to a method for generating pipe center elevation lines based on CAD. Background Art

[0002] Determining the elevation of the pipeline design axis is a key and difficult issue in the design of this type of engineering. There are many influencing factors. The pipeline elevation needs to meet the burial depth requirements and the slope change points need to avoid surface farmland, roads, ditches and other land types.

[0003] Pipeline Centerline Design focuses on automating the drawing of topographic lines and pipeline centerline elevations during the design of long-distance water pipeline projects. Currently, this process is manually drawn by designers, which is inefficient. The design solution is determined by the designer's level of expertise, making it difficult to generate an optimal, spatially balanced solution. Summary of the Invention

[0004] Aiming at the problem that the existing pipe center elevation line generation method lacks automatic generation function and has poor efficiency in drawing pipe center elevation lines, the present invention provides a pipe center elevation line generation method based on CAD.

[0005] In order to achieve the above technical objectives, the technical solutions adopted by the present invention are as follows:

[0006] A method for generating a pipe center elevation line based on CAD, comprising the steps of:

[0007] S1. Obtain basic data along the pipeline through field survey;

[0008] S2. Input the basic data along the pipeline into EXCEL to form surveying and mapping data;

[0009] S3. Preprocess the remarks column of the surveying and mapping data in EXCEL;

[0010] S4, importing the pre-processed surveying and mapping data into the pipe center elevation line generation system;

[0011] S5. Generate a pipe center elevation line through a pipe center elevation line generation system;

[0012] S6. Calculate the coordinates of the pipeline center elevation line based on the pipe center elevation line.

[0013] Furthermore, the basic data along the pipeline include pile number, ground elevation, pipe top elevation, pipeline thickness, pipe bottom elevation and longitudinal slope.

[0014] Furthermore, the pipe center elevation line generation system controls the direction of the pipe center elevation line according to the terrain and pipeline longitudinal section design specifications. Its control range includes maximum burial depth, minimum burial depth, maximum slope, minimum slope change length and obstacle avoidance distance.

[0015] Furthermore, the pipeline center elevation line is equal to 0.5 times the sum of the pipe top elevation and the pipe bottom elevation, and the pipeline radius is equal to the pipe top elevation minus the pipe bottom elevation minus 0.5 times the pipeline thickness.

[0016] Furthermore, the calculation formula for the center elevation line length of the pipeline elbow of the pipeline center elevation line includes:

[0017] According to the parameters of the elbow, calculate the inner bend radius (R) and the angle (0) of the elbow:

[0018] The inner bend radius of the elbow (R) = the diameter of the elbow (D) / 2

[0019] Calculate the arc length of the elbow based on the inner bend radius and the angle of the elbow:

[0020] Elbow arc length (L) = π × R × θ / 180

[0021] Calculate the centerline length of the elbow based on the arc length and angle of the elbow:

[0022] Centerline length of elbow = L + R × sin (θ / 2)

[0023] Furthermore, the generated pipeline center elevation line map needs to be compressed horizontally and vertically to form a proportional map; because the pipeline distance is long, the pipeline slope change is not obvious, which facilitates subsequent drawing.

[0024] X-axis compression ratio: This parameter controls the horizontal ratio of the compressed image generated by the plug-in;

[0025] Y-axis compression ratio: This parameter controls the vertical ratio of the compressed image generated by the plug-in.

[0026] Furthermore, the buildings are numbered in the pre-processing of the notes column of the surveying and mapping data in EXCEL. The numbering rules are as follows:

[0027] “0” represents the starting point of obstacle avoidance;

[0028] “1” represents the end point of obstacle avoidance;

[0029] “-1” represents the bottom of the building;

[0030] “2 / Pipe Diameter / Elevation” represents the existing water supply and drainage pipes.

[0031] For example: through a canal "0;-1;...;1"; through a road "0;1"; through cultivated land "0;...;1"; through a drainage pipe with a DN1800 pipe elevation of 1500 "2 / 1800 / 1500"; and so on.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] Basic data along the pipeline is collected through field surveys, formatted and entered into Excel for preprocessing. Finally, the data is input into the Pipe Center Elevation Line Generation System to generate the corresponding pipeline center elevation line and its coordinates. This reduces the inefficiency of manual drawing and the error rate of manual processing, resulting in an optimal spatial balance solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 The figure is an overall flow chart of a method for generating pipe center elevation lines based on CAD in an embodiment of the present invention. DETAILED DESCRIPTION

[0035] In order to facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments and drawings. The contents mentioned in the embodiments are not intended to limit the present invention.

[0036] like Figure 1 As shown, this embodiment provides a method for generating a pipe center elevation line based on CAD, comprising the steps of:

[0037] S1. Obtain basic data along the pipeline through field survey;

[0038] S2. Input the basic data along the pipeline into EXCEL to form surveying and mapping data;

[0039] S3. Preprocess the remarks column of the surveying and mapping data in EXCEL;

[0040] S4, importing the pre-processed surveying and mapping data into the pipe center elevation line generation system;

[0041] S5. Generate a pipe center elevation line through a pipe center elevation line generation system;

[0042] S6. Calculate the coordinates of the pipeline center elevation line based on the pipe center elevation line.

[0043] The basic data along the pipeline include pile number, ground elevation, pipe top elevation, pipeline thickness, pipe bottom elevation and longitudinal slope.

[0044] The pipe center elevation line generation system controls the direction of the pipe center elevation line according to the terrain and pipeline longitudinal section design specifications. Its control range includes maximum burial depth, minimum burial depth, maximum slope, minimum slope change length and obstacle avoidance distance.

[0045] The center elevation line of the pipeline is equal to 0.5 times the sum of the pipe top elevation and the pipe bottom elevation. The pipeline radius is equal to the pipe top elevation minus the pipe bottom elevation minus 0.5 times the pipeline thickness.

[0046] The calculation formula for the center elevation line length of the pipe elbow includes:

[0047] According to the parameters of the elbow, calculate the inner bend radius (R) and the angle (0) of the elbow:

[0048] The inner bend radius of the elbow (R) = the diameter of the elbow (D) / 2

[0049] Calculate the arc length of the elbow based on the inner bend radius and the angle of the elbow:

[0050] Elbow arc length (L) = π × R × θ / 180

[0051] Calculate the centerline length of the elbow based on the arc length and angle of the elbow:

[0052] Centerline length of elbow = L + R × sin (θ / 2)

[0053] The generated pipeline center elevation line map needs to be compressed horizontally and vertically to form a proportional map; due to the long distance of the pipeline, the pipeline slope change is not obvious, which facilitates subsequent drawing.

[0054] X-axis compression ratio: This parameter controls the horizontal ratio of the compressed image generated by the plug-in;

[0055] Y-axis compression ratio: This parameter controls the vertical ratio of the compressed image generated by the plug-in.

[0056] The buildings are numbered in the pre-processing of the remarks column of the surveying and mapping data in EXCEL. The numbering rules are as follows:

[0057] “0” represents the starting point of obstacle avoidance;

[0058] “1” represents the end point of obstacle avoidance;

[0059] “-1” represents the bottom of the building;

[0060] “2 / Pipe Diameter / Elevation” represents the existing water supply and drainage pipes.

[0061] For example: through a canal "0;-1;...;1"; through a road "0;1"; through cultivated land "0;...;1"; through a DN1800 drainage pipe with a top elevation of 1500 "2 / 1800 / 1500"; and so on.

[0062] Compared with the prior art, the present invention has the following beneficial effects:

[0063] Basic data along the pipeline is collected through field surveys, formatted and entered into Excel for preprocessing. Finally, the data is input into the Pipe Center Elevation Line Generation System to generate the corresponding pipeline center elevation line and its coordinates. This reduces the inefficiency of manual drawing and the error rate of manual processing, resulting in an optimal spatial balance solution.

[0064] The above describes in detail a CAD-based method for generating pipe center elevation lines provided by this application. The description of the specific embodiments is intended only to facilitate understanding of the method and core concepts of this application. It should be noted that those skilled in the art may make various improvements and modifications to this application without departing from the principles of this application, and such improvements and modifications also fall within the scope of protection of the claims of this application.

Claims

1. A method for generating pipe center elevation lines based on CAD, characterized in that: Including steps: S1. Obtain basic data along the pipeline through field survey; S2. Input the basic data along the pipeline into EXCEL to form surveying and mapping data; S3. Preprocess the remarks column of the surveying and mapping data in EXCEL; S4, importing the pre-processed surveying and mapping data into the pipe center elevation line generation system; S5. Generate a pipe center elevation line through a pipe center elevation line generation system; S6. Calculate the coordinates of the pipeline center elevation line based on the pipe center elevation line.

2. The method for generating a pipe center elevation line based on CAD according to claim 1, characterized in that: The basic data along the pipeline include pile number, ground elevation, pipe top elevation, pipeline thickness, pipe bottom elevation and longitudinal slope.

3. The method for generating pipe center elevation lines based on CAD according to claim 2, characterized in that: The pipe center elevation line generation system controls the direction of the pipe center elevation line according to the terrain and pipeline longitudinal section design specifications. Its control range includes maximum burial depth, minimum burial depth, maximum slope, minimum slope change length and obstacle avoidance distance.

4. The method for generating a pipe center elevation line based on CAD according to claim 3, characterized in that: The center elevation line of the pipeline is equal to 0.5 times the sum of the pipe top elevation and the pipe bottom elevation. The pipeline radius is equal to the pipe top elevation minus the pipe bottom elevation minus 0.5 times the pipeline thickness.

5. The method for generating pipe center elevation lines based on CAD according to claim 4, characterized in that: The calculation formula for the center elevation line length of the pipe elbow includes: According to the parameters of the elbow, calculate the inner bend radius (R) and the angle (θ) of the elbow: The inner bend radius of the elbow (R) = the diameter of the elbow (D) / 2 Calculate the arc length of the elbow based on the inner bend radius and the angle of the elbow: Elbow arc length (L) = π × R × θ / 180 Calculate the centerline length of the elbow based on the arc length and angle of the elbow: The centerline length of the elbow = L + R × sin (θ / 2).

6. The method for generating pipe center elevation lines based on CAD according to claim 5, characterized in that: The generated pipeline center elevation line diagram needs to be compressed horizontally and vertically to form a proportional diagram; X-axis compression ratio: This parameter controls the horizontal ratio of the compressed image generated by the plug-in; Y-axis compression ratio: This parameter controls the vertical ratio of the compressed image generated by the plug-in.

7. The method for generating pipe center elevation lines based on CAD according to claim 6, characterized in that: The buildings are numbered in the pre-processing of the remarks column of the surveying and mapping data in EXCEL. The numbering rules are as follows: "0" represents the starting point of obstacle avoidance; "1" represents the end point of obstacle avoidance; "-1" represents the bottom of the building; "2 / pipe diameter / elevation" represents the water supply and drainage pipes.

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