Indoor pipeline structure model rapid modeling method and system based on 3D printing technology and medium

Abstract

The invention relates to an indoor pipeline structure model rapid modeling method and system based on a 3D printing technology and a medium. The method comprises the steps that internal structure size data of an indoor pipeline structure physical model are collected, and abnormal values are removed; selecting a model manufacturing range; manufacturing an indoor pipeline structure model in three parts; and after the physical models of the three parts of the water tank, the pipeline and the water tank are adjusted to be manufactured, outputting and printing manufacturing of the whole model block are carried out. According to the method, a digital model for 3D printing identification can be rapidly established for any complex pipeline structure and the configuration of internal sediments of the pipeline structure, and it can be ensured that a physical model and a prototype of the pipeline structure have high similarity.

Description

Technical Field

[0001] The present application relates to the field of hydrodynamic experimental technology, and in particular to a method, system and medium for rapid modeling of indoor pipeline structure models based on 3D printing technology. Background Art

[0002] Hydrodynamic experiments are an integral part of fluid dynamics research. Instruments and other experimental equipment are used to measure various physical parameters that characterize the flow of water or other liquids and their interactions with solid boundaries, and the measurement results are analyzed and processed to study the relationship between various parameters. It is difficult to control various parameters separately when conducting prototype experiments, and it is expensive and sometimes even impossible to conduct. For example, a water conservancy project or underwater vehicle has no experimental subjects before it is built. Later, hydrodynamic experiments were mostly conducted using models in specially designed laboratories or experimental fields. This is the so-called model experiment. The experimental model is generally smaller than the prototype, but there are also models that are equal to or larger than the prototype. The hydrodynamic model experiment is to study the functional relationship between a certain flow characteristic parameter of the fluid and the boundary shape parameter, fluid characteristic parameter, and force parameter.

[0003] The rainwater pipes entering the river are the key link in rainwater transportation, and their drainage capacity is crucial to the prevention and control of urban flooding. Urban rainstorms can simultaneously cause a sharp increase in upstream flow and a rapid rise in downstream river water levels, thereby forming hydraulic support and causing gas to gather in the rainwater pipes entering the river. In the field of urban rainwater pipes, current work at home and abroad mainly focuses on studying the siltation process in the pipes, the hydraulic influence of rainwater grate blockage, drainage capacity assessment methods, and pipeline optimization and expansion technologies. At present, research on the impact of sediments in rainwater pipes on flow capacity mainly focuses on the impact of factors such as the accumulated thickness of sediments in rainwater pipes, the rough thickness of sediment surfaces, and the slope of pipes on the flow capacity of rainwater pipes. Summary of the invention

[0004] The purpose of the embodiments of the present application is to provide a method, system and medium for rapid modeling of indoor pipeline structure models based on 3D printing technology, which can conveniently and quickly establish a digital model that can be recognized by a 3D printer according to the model test size parameters, ensuring that the physical model of the tubular structure produced has a high degree of similarity with the prototype.

[0005] To achieve the above objectives, this application provides the following technical solutions:

[0006] In a first aspect, an embodiment of the present application provides a method for rapid modeling of an indoor pipeline structure model based on 3D printing technology, comprising the following steps:

[0007] S1. Collect the internal structure dimension data of the physical model of the indoor pipeline structure and remove outliers;

[0008] S2. Select the model making scope;

[0009] S3. The production of indoor pipeline structure models is divided into three parts, namely the production of regulating water tanks, the production of pipeline models and the production of sink models;

[0010] S4. The production of the regulating water tank is divided into determining the model size and parameter data; integrating the model boundary control point data; generating the model STL file; selecting the model material; and cutting the model;

[0011] S5. The production of pipeline model includes determining the pipe diameter, length, and slope data; determining the pipeline sediment parameters and distribution location; generating the model STL file; selecting the model material; and cutting the model.

[0012] S6. The production of the water tank model is divided into determining the model size; integrating the model boundary control point data; generating the model STL file; selecting the model material; and cutting the model.

[0013] S7. After the physical models of the three parts of the water tank, pipe and sink are completed, the entire model block is output and printed.

[0014] The step S1 is specifically as follows:

[0015] Select the overall slope value of the tubular structure;

[0016] Determine the experimental water level L1 that the regulating water tank can reach and the water level L2 in the water tank;

[0017] During the physical model experiment of the indoor tubular structure, it is necessary to ensure that L1>L2, so it is necessary to eliminate the height H1 of the regulating water tank and the height H2 of the water tank that do not meet the water level H1, that is:

[0018] H1-L1≥0 and H2-L2≥0 data is retained

[0019] H1-L1<0 and H2-L2<0 data is retained.

[0020] In step S3:

[0021] The regulating water tank is used as the upstream boundary part of the incoming water of the pipeline model, and the water tank model is the downstream water receiving part of the pipeline part.

[0022] The step S4 is further as follows:

[0023] The water depth of the regulating water tank is not less than 3 cm, and the model scale is 1:200. A circular water outlet is reserved and designed on one side wall of the regulating water tank so as to be spliced ​​with the subsequent pipeline model part. The size and shape parameters of the regulating water tank are used to generate an STL file of the model. The established STL file is divided into equal lengths and widths according to the plane scale of the regulating water tank model. After the division is completed, multiple STL files of the regulating water tank model blocks are generated, and the divided STL files are transmitted to the 3D printer for printing.

[0024] The step S5 is specifically as follows:

[0025] Firstly, the outer diameter R1, inner diameter R2, length L and slope P dimension data of the pipeline model are determined, and the model scale is 1:200. The two-dimensional coordinates of each controlling node on the boundary of the production range of the regulating water tank are added with the model bottom elevation D and the water tank flat top elevation M respectively, and the generated three-dimensional points are added to the replaced elevation data to form the integrated regulating water tank elevation data; secondly, inside the pipeline model, according to the requirements of the pipeline hydrodynamic test, a generalized model similar to the sediment body is set in the pipeline. According to the size of the sediment body, it is generalized into a sphere with a radius of r and embedded in the inner wall of the pipeline. The adjacent spacing of the generalized model of spherical sediment is set according to the test plan of the model.

[0026] The step S6 is specifically as follows:

[0027] The water depth of the water tank model is not less than 3 cm, and the model scale is 1:200. A circular water outlet is reserved and designed on one side wall of the water tank model so as to be spliced ​​with the pipeline model. The size and shape parameters of the water tank model are used to generate an STL file of the model. The established STL file is divided into equal lengths and widths according to the plane scale of the adjustment water tank model. After the division is completed, multiple STL files of the adjustment water tank model blocks are generated, and the divided STL files are transmitted to the 3D printer for printing.

[0028] In a second aspect, the embodiment of the present application provides a rapid modeling system for indoor pipeline structure models based on 3D printing technology, comprising:

[0029] The acquisition module is used to collect the internal structure dimension data of the physical model of the indoor pipeline structure and remove abnormal values;

[0030] The model making module is used to select the model making scope; the making of indoor pipeline structure model is divided into three parts, namely the making of regulating water tank, the making of pipeline model and the making of sink model; the making of regulating water tank is divided into determining the model size and parameter data; integrating the model boundary control point data; generating the model STL file; selecting the model material; and cutting the model; the making of pipeline model is divided into determining the pipe diameter, length and slope data; determining the pipeline sediment parameters and distribution location; generating the model STL file; selecting the model material; and cutting the model; the making of sink model is divided into determining the model size; integrating the model boundary control point data; generating the model STL file; selecting the model material; and cutting the model;

[0031] Output the printing module, adjust the water tank, pipes and sink, and after the physical models are completed, output and print the entire model block.

[0032] In a third aspect, an embodiment of the present application provides a computer-readable storage medium, which stores a program code. When the program code is executed by a processor, the steps of the method for rapid modeling of an indoor piping structure model based on 3D printing technology as described above are implemented.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] The present application can conveniently and rapidly establish a digital model that can be recognized by a 3D printer according to the model test size parameters, ensuring that the physical model of the tubular structure produced has a high degree of similarity with the prototype. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0036] Figure 1 It is a flow chart of the modeling method of the present invention.

[0037] Figure 2 It is a modeling diagram of the physical model of a tubular structure. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0039] The terms "comprises," "comprising," or any other variation thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0040] The terms "first", "second", etc. are only used to distinguish one entity or operation from another entity or operation, and should not be understood as indicating or implying relative importance, nor should they be understood as requiring or implying any such actual relationship or order between these entities or operations.

[0041] like Figure 1 A rapid modeling method for an indoor pipeline structure model based on 3D printing technology is shown, comprising the following steps:

[0042] S1. Collect the internal structure dimension data of the physical model of the indoor pipeline structure and remove outliers;

[0043] S2. Select the model making scope;

[0044] S3. The production of indoor pipeline structure models is divided into three parts, namely the production of regulating water tanks, the production of pipeline models and the production of sink models;

[0045] S4. The production of the regulating water tank is divided into determining the model size and parameter data; integrating the model boundary control point data; generating the model STL file; selecting the model material; and cutting the model;

[0046] S5. The production of pipeline model includes determining the pipe diameter, length, and slope data; determining the pipeline sediment parameters and distribution location; generating the model STL file; selecting the model material; and cutting the model.

[0047] S6. The production of the water tank model is divided into determining the model size; integrating the model boundary control point data; generating the model STL file; selecting the model material; and cutting the model.

[0048] S7. After the physical models of the three parts of the water tank, pipe and sink are completed, the entire model block is output and printed.

[0049] 1. Model data collection

[0050] According to the requirements of indoor pipeline hydrodynamic tests, the parameters of the tubular structure model to be manufactured are clarified, including the outer diameter R1, inner diameter R2, length L, slope P, etc. of the tubular structure. In addition, the size parameters of the generalized sedimentation body in the tubular structure need to be clarified, such as the radius r, number N, and spacing l between adjacent generalized sedimentation bodies.

[0051] 2. Outlier Removal

[0052] In the process of collecting model data, there will be some data anomalies. For example, due to human error and machine error, some data that is obviously different from the normal size of the tubular structure will be generated. In order to ensure the accuracy of the model, such data must be extracted from the basic data of the model making. The specific algorithm steps include:

[0053] Select the overall slope value of the tubular structure;

[0054] Determine the experimental water level L1 that the regulating water tank can reach and the water level L2 in the water tank;

[0055] 3) During the physical model experiment of the indoor tubular structure, it is necessary to ensure that L1>L2, so it is necessary to eliminate the height H1 of the regulating water tank and the height H2 of the water tank that do not meet the water level H1, that is:

[0056] H1-L1≥0 and H2-L2≥0 data is retained

[0057] H1-L1<0 and H2-L2<0 data is retained

[0058] Repeat the above steps to eliminate all data outliers and form the model parameter data after elimination.

[0059] 3. Select the scope of model making

[0060] According to the model requirements of indoor pipeline hydrodynamic tests, the model making range is appropriately selected, including the water tank model and the sink model on both sides. The determination of the model making range should be based on ensuring that the model making range has no impact on the model test results.

[0061] 4. Making of regulating water tank

[0062] Under the premise that the water depth of the regulating water tank should not be less than 3cm, the model scale is determined to be 1:200 based on the maximum size that can be printed by the 3D printer. A circular water outlet is reserved on one side wall of the regulating water tank to facilitate splicing with the subsequent pipeline model. The size and shape parameters of the regulating water tank are used to generate the STL file of the model, and the established STL file is divided into equal lengths and widths according to the plane scale of the regulating water tank model. After the division is completed, multiple STL files of the regulating water tank model blocks are generated, and the divided STL files are transferred to the 3D printer for printing.

[0063] 5. Production of pipeline model

[0064] First, determine the dimensional data of the pipeline model, such as the outer diameter R1, inner diameter R2, length L and slope P, and determine the model scale to be 1:200 based on the maximum size that can be printed by the 3D printer. Add the two-dimensional coordinates of each controlling node on the boundary of the production range of the regulating water tank to the model bottom elevation D and the water tank flat top elevation M, and add the generated three-dimensional points to the replaced elevation data to form the integrated regulating water tank elevation data. Secondly, inside the pipeline model, according to the requirements of the pipeline hydrodynamic test, some generalized models similar to sediment bodies need to be set up in the pipeline. According to the size of the sediment body, it is generalized into a sphere (radius r) embedded in the inner wall of the pipeline. The adjacent spacing (l) of the generalized model of spherical sediment is set according to the test plan of the model.

[0065] 6. Making of the Sink Model

[0066] The water tank model is designed with a model scale of 1:200 based on the maximum size that can be printed by the 3D printer, under the premise that the water depth should not be less than 3 cm. A circular water outlet is reserved on one side of the water tank model to facilitate splicing with the pipe model. The size and shape parameters of the above water tank model are used to generate the STL file of the model, and the established STL file is divided into equal lengths and widths according to the plane scale of the adjustment water tank model. After the division is completed, multiple STL files of the adjustment water tank model blocks are generated, and the divided STL files are transferred to the 3D printer for printing.

[0067] like Figure 2 , modeling diagram of the physical model of the tubular structure, where A is the water tank part, B is the pipeline model part, and C is the sink part.

[0068] A rapid modeling system for indoor pipeline structure models based on 3D printing technology, including:

[0069] The acquisition module is used to collect the internal structure dimension data of the physical model of the indoor pipeline structure and remove abnormal values;

[0070] The model making module is used to select the model making scope; the making of indoor pipeline structure model is divided into three parts, namely the making of regulating water tank, the making of pipeline model and the making of sink model; the making of regulating water tank is divided into determining the model size and parameter data; integrating the model boundary control point data; generating the model STL file; selecting the model material; and cutting the model; the making of pipeline model is divided into determining the pipe diameter, length and slope data; determining the pipeline sediment parameters and distribution location; generating the model STL file; selecting the model material; and cutting the model; the making of sink model is divided into determining the model size; integrating the model boundary control point data; generating the model STL file; selecting the model material; and cutting the model;

[0071] Output the printing module, adjust the water tank, pipes and sink, and after the physical models are completed, output and print the entire model block.

[0072] An embodiment of the present application provides a computer-readable storage medium, which stores program code. When the program code is executed by a processor, the steps of the method for quickly calculating the backflow water volume of a reservoir tributary as described above are implemented.

[0073] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0074] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0075] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0076] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process in the computer or other programmable device. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0077] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0078] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.

[0079] Computer readable media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. Information can be computer readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include temporary computer readable media (transitory media), such as modulated data signals and carrier waves.

[0080] The above description is only an embodiment of the present application and is not intended to limit the protection scope of the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A rapid modeling method for indoor pipeline structure model based on 3D printing technology, characterized in that: The steps include: S1. Collect the internal structure dimension data of the physical model of the indoor pipeline structure and remove outliers; S2. Select the model making scope; S3. The production of indoor pipeline structure models is divided into three parts, namely the production of regulating water tanks, the production of pipeline models and the production of sink models; S4. The production of the regulating water tank is divided into determining the model size and parameter data; integrating the model boundary control point data; generating the model STL file; selecting the model material; and cutting the model; S5. The production of pipeline model includes determining the pipe diameter, length, and slope data; determining the pipeline sediment parameters and distribution location; generating the model STL file; selecting the model material; and cutting the model. S6. The production of the water tank model is divided into determining the model size; integrating the model boundary control point data; generating the model STL file; selecting the model material; and cutting the model. S7. After the physical models of the three parts of the water tank, pipe and sink are completed, the entire model block is output and printed.

2. The method for rapid modeling of indoor pipeline structure model based on 3D printing technology as claimed in claim 1, characterized in that: The step S1 is specifically as follows: Select the overall slope value of the tubular structure; Determine the experimental water level L1 that the regulating water tank can reach and the water level L2 in the water tank; During the physical model experiment of the indoor tubular structure, it is necessary to ensure that L1>L2, so it is necessary to eliminate the height H1 of the regulating water tank and the height H2 of the water tank that do not meet the water level H1, that is: H1-L1≥0 and H2-L2≥0 data is retained H1-L1<0 and H2-L2<0 data is retained.

3. The method for rapid modeling of indoor pipeline structure model based on 3D printing technology as claimed in claim 1, characterized in that: In step S3: The regulating water tank is used as the upstream boundary part of the incoming water of the pipeline model, and the water tank model is the downstream water receiving part of the pipeline part.

4. The method for rapid modeling of indoor pipeline structure model based on 3D printing technology according to claim 1, characterized in that: The step S4 is further as follows: The water depth of the regulating water tank is not less than 3 cm, and the model scale is 1:

200. A circular water outlet is reserved and designed on one side wall of the regulating water tank so as to be spliced ​​with the subsequent pipeline model part. The size and shape parameters of the regulating water tank are used to generate an STL file of the model. The established STL file is divided into equal lengths and widths according to the plane scale of the regulating water tank model. After the division is completed, multiple STL files of the regulating water tank model blocks are generated, and the divided STL files are transmitted to the 3D printer for printing.

5. The method for rapid modeling of indoor pipeline structure model based on 3D printing technology as claimed in claim 1, characterized in that: The step S5 is specifically as follows: Firstly, the outer diameter R1, inner diameter R2, length L and slope P dimension data of the pipeline model are determined, and the model scale is 1:

200. The two-dimensional coordinates of each controlling node on the boundary of the production range of the regulating water tank are added with the model bottom elevation D and the water tank flat top elevation M respectively, and the generated three-dimensional points are added to the replaced elevation data to form the integrated regulating water tank elevation data; secondly, inside the pipeline model, according to the requirements of the pipeline hydrodynamic test, a generalized model similar to the sediment body is set in the pipeline. According to the size of the sediment body, it is generalized into a sphere with a radius of r and embedded in the inner wall of the pipeline. The adjacent spacing of the generalized model of spherical sediment is set according to the test plan of the model.

6. The method for rapid modeling of indoor pipeline structure model based on 3D printing technology as claimed in claim 1, characterized in that: The step S6 is specifically as follows: The water depth of the water tank model is not less than 3 cm, and the model scale is 1:

200. A circular water outlet is reserved and designed on one side wall of the water tank model so as to be spliced ​​with the pipeline model. The size and shape parameters of the water tank model are used to generate an STL file of the model. The established STL file is divided into equal lengths and widths according to the plane scale of the adjustment water tank model. After the division is completed, multiple STL files of the adjustment water tank model blocks are generated, and the divided STL files are transmitted to the 3D printer for printing.

7. A rapid modeling system for indoor pipeline structure models based on 3D printing technology, characterized in that: include, The acquisition module is used to collect the internal structure dimension data of the physical model of the indoor pipeline structure and remove abnormal values; The model making module is used to select the model making scope; the making of indoor pipeline structure model is divided into three parts, namely the making of regulating water tank, the making of pipeline model and the making of sink model; the making of regulating water tank is divided into determining the model size and parameter data; integrating the model boundary control point data; generating the model STL file; selecting the model material; and cutting the model; the making of pipeline model is divided into determining the pipe diameter, length and slope data; determining the pipeline sediment parameters and distribution location; generating the model STL file; selecting the model material; and cutting the model; the making of sink model is divided into determining the model size; integrating the model boundary control point data; generating the model STL file; selecting the model material; and cutting the model; Output the printing module, adjust the water tank, pipes and sink, and after the physical models are completed, output and print the entire model block.

8. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores program codes, and when the program codes are executed by a processor, the steps of the method for rapid modeling of an indoor pipeline structure model based on 3D printing technology as described in any one of claims 1 to 6 are implemented.

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