BIM dimension calculation checking method based on parametric geometry recognition

Abstract

The application discloses a BIM size calculation checking method based on parameter geometry recognition, comprising the following steps: 1, creating size calculation rules in a BIM software environment; 2, filtering BIM component data to be processed through the size calculation rules to obtain parameter sizes; analyzing each parameter size and calculating the geometric size of a component model represented by the BIM component data; 3, performing size checking on each geometric size, checking the inconsistent conditions between each geometric size and the corresponding parameter size, and generating corresponding size checking results; 4, checking the component model represented by the BIM component data through visual positioning in the BIM software environment, auditing and checking each size checking result, and checking the accuracy of the size checking result; 5, exporting all the size checking results that have completed the accuracy checking, and generating a result report. The application efficiently and accurately solves the auditing problem of three-dimensional BIM design sizes.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of computer-aided design, in particular to a BIM size calculation checking method based on parameter geometry recognition. BACKGROUND

[0002] In the design phase of a construction project, the structural size of a structure is often determined through rigorous stress analysis, mechanical calculation, test testing and other links, which is an important link to ensure the quality of the project in terms of the function and safety performance of the entire project.

[0003] In the CAD design link, the size of the structure is usually in the form of two-dimensional illustration and size marking, although there are occasional cases where the illustrated size and the marked size are inconsistent, but basically this kind of design problem will be corrected after multi-party design checking before construction.

[0004] With the gradual advancement of Industry 4.0, construction projects are also transforming from traditional design to digitalization, and building information modeling (BIM) technology is also gradually replacing CAD technology.

[0005] However, in the prior art, the contradiction of design size accuracy is once again highlighted, in addition to the consistency problem of the marked and illustrated sizes that we need to pay attention to in the past, there is further inconsistency in the three-dimensional geometric model of the component, and the amount of checking and correction has far exceeded the original CAD drawing checking level.

[0006] Therefore, how to improve the quality and safety of BIM design and realize the positive effect of digital design transformation has become a technical problem that technicians in the field need to solve. SUMMARY

[0007] In view of the above defects of the prior art, the present application provides a BIM size calculation checking method based on parameter geometry recognition, which realizes the purpose of replacing manual checking and calculation with the operation advantage of computing technology, automatically checks and calculates the three-dimensional size, and improves the accuracy of BIM design size.

[0008] To achieve the above purpose, the present application discloses a BIM size calculation checking method based on parameter geometry recognition, comprising the following steps:

[0009] Step 1, creating size calculation rules in a BIM software environment;

[0010] Step 2, filtering the BIM component data to be processed through the size calculation rules to obtain parameter sizes;

[0011] Analyzing each parameter size and calculating the geometric size of the component model represented by the BIM component data;

[0012] Step 3, size checking is performed on each of the geometric dimensions, and the size checking result is generated when inconsistency exists between each of the geometric dimensions and the corresponding parameter dimension;

[0013] Step 4, the accuracy of each of the size checking results is verified by visual positioning reverse checking of the component model represented by the BIM component data in the BIM software environment;

[0014] Step 5, all the size checking results that have passed the accuracy verification are exported, and a result report in a commonly used document format is generated with the component name, the parameter dimension, and the geometric dimension as the index.

[0015] Preferably, in step 1, the size calculation rules include geometric classification definition, available category definition, and geometric dimension definition, and the specific steps are as follows:

[0016] Step 1.1, the geometric classification definition is to classify the component data in the BIM component data that is the same as the size calculation item according to the characteristics of the engineering specialty classification in the BIM software environment;

[0017] Step 1.2, the available category definition is to check and redefine each of the classified component data respectively, so that all the classified component data in the BIM software environment correspond to the corresponding engineering specialty classification respectively, and the category range of all the component data contained in the BIM component data is also determined;

[0018] Step 1.3, the geometric dimension definition is to check and redefine the geometric dimension item, the data source of the parameter dimension, and the calculation formula and unit of the geometric dimension of each of the classified component data respectively, so that the geometric dimension item, the data source of the parameter dimension, and the calculation formula and unit of the geometric dimension of each of the classified component data in the BIM software environment all conform to the corresponding rules.

[0019] More preferably, in step 2, the family name and type name of the BIM component data are parsed, and a hierarchical composite geometric algorithm is used when calculating the geometric dimension of the component model represented by the BIM component data.

[0020] More preferably, in step 3, each of the geometric dimensions is defined as being consistent with the item in the geometric dimension definition in step 1.

[0021] More preferably, in step 4, the visual positioning reverse checking in the BIM software environment has the function of three-dimensional model sectioning and irrelevant component isolation.

[0022] More preferably, in step 5, the BIM software environment can generate a three-dimensional model screenshot of the problem component according to the result report, and calculate the geometric spatial information of the axis net position.

[0023] Advantages of the present application:

[0024] The present application realizes the method for checking the parameter size and geometric size of components in the BIM model, and efficiently and accurately solves the three-dimensional BIM design size checking problem through the composite and step-by-step operation of the bounding box calculation method, triangular surface fitting method, plane projection method and section checking method.

[0025] The present application compares the parameter size and geometric size of components in the BIM model synchronously, ensures the consistency of the component size and design requirements, checks various sizes through highly customized rules, solves the problem of correspondence between the classification of the BIM model and the classification in the engineering specialty, and effectively plays the three-dimensional advantages of the BIM technology and the advantages of the computer calculation efficiency.

[0026] The concept, specific structure and technical effects of the present application will be further described below in combination with the drawings, so as to fully understand the purpose, features and effects of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 An execution flowchart of an embodiment of the present application is shown. DETAILED DESCRIPTION

[0028] Embodiment 1

[0029] As shown in the figure, the BIM size calculation and checking method based on parameter geometry recognition comprises the following steps: Figure 1

[0030] Step 1, creating size calculation rules in the BIM software environment;

[0031] Step 2, filtering the BIM component data to be processed through the size calculation rules, and obtaining parameter sizes;

[0032] Analyzing each parameter size and calculating the geometric size of the component model represented by the BIM component data;

[0033] Step 3, performing size checking on each geometric size, checking the inconsistent conditions between each geometric size and the corresponding parameter size, and generating corresponding size checking results;

[0034] Step 4, checking and rechecking each size checking result through the visual positioning in the BIM software environment, and verifying the accuracy of the size checking result;​

[0035] Step 5, export all completed accuracy check size inspection results to generate a commonly used document format result report indexed by component name, parameter size and geometric size.

[0036] The principle of the present application is as follows:

[0037] Through the research of national standard specifications such as "Concrete Structure Design Specification GB50010-2020", "Building Drawing Standard Latest Version 50104-2017", "General Rules for Civil Building Design GB50352-2019" and the construction project, the important building size in the design drawing and its calculation rule can be summarized. Through open self-defined calculation rule, many size types can be checked according to different project characteristics, and many important problems such as inconsistency between CAD drawing and BIM model drawing, inconsistency between BIM component name and attribute parameter size, inconsistency between BIM component attribute parameter size and geometric size, etc. are solved.

[0038] In practical application, the performance and accuracy of size calculation are improved through step-by-step composite geometric algorithm, which is an important innovation value. The geometric size calculation of BIM data and model of large-scale engineering project has true practicability, and the size project calculation is more in line with engineering habits according to open defined calculation formula instead of simply calculating the geometric size of three-dimensional model, which effectively improves the work efficiency of designers.

[0039] In some embodiments, in step 1, the size calculation rule includes geometric classification definition, available category definition and geometric size definition, and the specific steps are as follows:

[0040] Step 1.1, geometric classification definition is to classify the same component data in BIM component data as the size project in the BIM software environment according to the characteristics of engineering professional classification;

[0041] Step 1.2, available category definition is to check and redefine each component data after classification respectively, so that all component data classified in the BIM software environment correspond to the corresponding engineering professional classification respectively, and the category range of all component data contained in the BIM component data is also determined;

[0042] Step 1.3, geometric size definition is to check and redefine the geometric size project, data source of parameter size and calculation formula and unit of geometric size of each component data after classification respectively, so that the geometric size project, data source of parameter size and calculation formula and unit of geometric size of each component data in the BIM software environment all conform to the corresponding rules.

[0043] In some embodiments, in step 2, the family name and type name of the BIM component data are parsed, and a hierarchical composite geometry algorithm is adopted in calculating the geometric size of the component model represented by the BIM component data.

[0044] The hierarchical composite geometry algorithm adopted in calculating the geometric size can significantly improve the operation efficiency while ensuring accuracy.

[0045] In some embodiments, in step 3, each item of the geometric size checking is defined to be consistent with the items in the geometric size definition in step 1.

[0046] In some embodiments, in step 4, the visualization positioning reverse lookup in the BIM software environment has the functions of three-dimensional model sectioning and irrelevant component isolation.

[0047] In practical applications, the visualization positioning reverse lookup with the functions of three-dimensional model sectioning and irrelevant component isolation can effectively verify the accuracy of geometric size calculation and the consistency with the parameter size of the BIM component data.

[0048] In some embodiments, in step 5, the BIM software environment can generate three-dimensional model screenshots of problem components according to the result report, and calculate the geometric spatial information of the axis network position.

[0049] Embodiment 2

[0050] The geometric size of the BIM model of the main structure of the platform of a certain subway project is calculated and checked, and the specific steps are as follows:

[0051] Step 1, create size calculation rules, define geometric classification, available categories and geometric size of BIM components participating in checking and calculation;

[0052] Step 1 includes the following steps:

[0053] Step 1.1, define geometric classification, define underground continuous structure, structural wall, rectangular column, rectangular beam, etc.

[0054] Step 1.2, define available categories, define available categories of BIM models such as ground connected wall, inner lining wall, structural column, structural frame, etc. under the geometric classification of underground continuous structure, structural wall, rectangular column, rectangular beam, etc.

[0055] In practical applications, the correspondence between engineering professional classification and BIM model classification is particularly important, otherwise it is difficult to perform a series of subsequent calculations and checks. The available categories are not limited to the categories of BIM models, but also apply to the correspondence of component names such as families and types. This innovative method effectively solves the important difference problem between the two classification habits.

[0056] Step 1.3, define the geometric size, define the cross-sectional width, cross-sectional height, length and other geometric size items under the geometric classification of rectangular beam, etc., the data sources of the cross-sectional width, cross-sectional height and length are k, b and l respectively, and the calculation formula is V=k*b*(l-200) with the unit of mm;

[0057] Step 2, analyze the BIM model parameter size and calculate the geometric size, filter out the components such as diaphragm wall, inner lining wall, structural column and structural frame which meet the available categories through size calculation rules, analyze the parameter size in the component attribute, and calculate the geometric size of the component model;

[0058] Step 3, size checking, select the size items such as diaphragm wall thickness, structural frame cross-sectional width and height, structural column height which need to be checked, check the components whose parameter size and geometric size are inconsistent, and generate the checking result;

[0059] Step 4, review and reverse check the size checking result, locate the actual size of the components such as diaphragm wall, structural frame and structural column, and further verify the accuracy of the size checking result;

[0060] Step 5, export the size checking result report, automatically generate the result report in the form of BIM model three-dimensional screenshot Word with the information such as component name, parameter size, geometric size in the checking result.

[0061] The above describes the preferred embodiments of the present application in detail. It should be understood that those skilled in the art can make many modifications and changes without creative labor according to the concept of the present application. Therefore, any technical solution obtained by logical analysis, reasoning or limited experiment on the basis of the prior art according to the concept of the present application shall be within the protection scope determined by the claims.

Claims

1. A method for BIM dimensioning check based on parametric geometric recognition; characterized in that, The method comprises the following steps: Step 1, creating size calculation rules in a BIM software environment, specifically including: geometric classification definition, available category definition and geometric size definition; Step 1.1, the geometric classification definition is to classify the same component data in the BIM component data as the calculation size item in the BIM software environment according to the characteristics of the engineering specialty classification; Step 1.2, the available category definition is to check and redefine each of the classified component data respectively, so that all the classified component data in the BIM software environment correspond to the corresponding engineering specialty classification respectively, and the category range of all the component data contained in the BIM component data is also determined; Step 1.3, the geometric size definition is to check and redefine the geometric size item, data source of parameter size, calculation formula and unit of geometric size of each of the classified component data respectively, so that the geometric size item, data source of parameter size, calculation formula and unit of geometric size of each of the component data in the BIM software environment all conform to the corresponding rules; Step 2, filtering the BIM component data to be processed through the size calculation rules to obtain parameter sizes; analyzing each of the parameter sizes and calculating the geometric size of the component model represented by the BIM component data; analyzing the family name and type name of the BIM component data, and using a hierarchical composite geometric algorithm when calculating the geometric size of the component model represented by the BIM component data; Step 3, performing size checking on each of the geometric sizes, checking that each of the geometric sizes is inconsistent with the corresponding parameter size, and generating corresponding size checking results; defining each of the items of the geometric size checking as being consistent with the items in the geometric size definition in step 1; Step 4, auditing and checking each of the size checking results by visual positioning reverse checking of the component model represented by the BIM component data in the BIM software environment, and verifying the accuracy of the size checking results; Step 5, exporting all the size checking results that have completed accuracy verification to generate a result report in a commonly used document format with component name, parameter size and geometric size as indexes.

2. The BIM dimensioning check method based on parametric geometry recognition according to claim 1, characterized in that, In step 4, the visual positioning reverse checking in the BIM software environment has the functions of three-dimensional model sectioning and irrelevant component isolation.

3. The method of claim 2, wherein, In step 5, the BIM software environment can generate three-dimensional model screenshots of problem components and calculate geometric spatial information of axis net positions according to the result report.

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