KR20220078859A - System and method for simplifying building shape of building information model - Google Patents

Abstract

A building shape simplification system and method of a building information model are disclosed. a BIM database in which a building information model (BIM) is stored; a BIM reading module for reading a building information model from the building information model stored in the BIM database; an original shape extraction module for extracting an original shape from the building information model read by the BIM reading module; A simplified shape acquisition module for acquiring a simplified shape from the building information model read by the BIM reading module is configured. According to the building shape simplification system and method of the building information model described above, the three-dimensional shape model of the building is configured to simplify the three-dimensional shape according to a predetermined algorithm by classifying the main surface, the opening surface, etc. from the original shape of the building information model. It has the effect of objectively simplifying the simplification and increasing the efficiency of the simplification work.

Description

SYSTEM AND METHOD FOR SIMPLIFYING BUILDING SHAPE OF BUILDING INFORMATION MODEL

The present invention relates to a building information model, and more particularly, to a system and method for simplifying a building shape of a building information model.

Building information modeling (BIM) is a method of modeling a specific building or space. Spatial information including 3D shape information can be stored, and it can be used in fields such as building design, environmental evaluation, and operation.

Various simulations including computational fluid dynamics are being used for designing a building or evaluating the environment of an existing building. For simulation, a three-dimensional shape model of the target building is required, and for this purpose, shape information extracted from building information modeling can be utilized.

However, a certain level of simplification is required when designing a simulation model because a model including the details and complex shape of the 3D shape model causes numerical analysis errors and computational load.

However, the manual simplification process using the existing CAD or CAM not only requires a lot of manpower and time, but also has problems in that non-objective shape deformation and mistakes may occur.

Accordingly, there is a demand for an algorithm that simplifies a model according to a constant and objective criterion.

Registered Patent Publication No. 10-1741015 Registered Patent Publication No. 10-1465483

An object of the present invention is to provide a building shape simplification system of a building information model.

Another object of the present invention is to provide a method of simplifying a building shape of a building information model.

Building shape simplification system of the building information model according to the object of the present invention described above, the building information model (building information model, BIM) is stored BIM database; a BIM reading module for reading a building information model from the building information model stored in the BIM database; It may be configured to include an original shape extraction module for extracting an original shape from the building information model read by the BIM reading module.

And it may be configured to further include a simplified shape acquisition module for acquiring a simplified shape from the building information model read by the BIM reading module.

A method of simplifying a building shape of a building information model according to another object of the present invention described above includes: reading, by a BIM reading module, a building information model from a building information model stored in advance in a BIM database; The original shape extraction module may be configured to include extracting the original shape from the building information model read by the BIM reading module.

And the simplified shape acquisition module may be configured to further include the step of acquiring the simplified shape from the building information model read by the BIM reading module.

According to the building shape simplification system and method of the building information model described above, the three-dimensional shape model of the building is configured to simplify the three-dimensional shape according to a predetermined algorithm by classifying the main surface, the opening surface, etc. from the original shape of the building information model. It has the effect of objectively simplifying the simplification and increasing the efficiency of the simplification work.

In other words, regardless of the characteristics of the target building or the skill level of the analyst, there is an advantage that the result of shape simplification can always be seen.

1 is a schematic diagram of a building shape simplification process of a building information model according to an embodiment of the present invention.
2 is a block diagram of a building shape simplification system of a building information model according to an embodiment of the present invention.
3 is a schematic diagram of an original shape extraction process according to an embodiment of the present invention.
4 is an exemplary diagram of a surface classification process according to an embodiment of the present invention.
5 is an exemplary diagram of a basal stereoscopic segmentation process according to an embodiment of the present invention.
6 is an exemplary diagram of a segmented basis stereoscopic selection process according to an embodiment of the present invention.
7 is a flowchart of a method of simplifying a building shape of a building information model according to an embodiment of the present invention.

Since the present invention can have various changes and can have various embodiments, specific embodiments are illustrated in the drawings and will be described in detail in the detailed content for carrying out the invention. However, this is not intended to limit the present invention to specific embodiments, and it should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention. In describing each figure, like reference numerals have been used for like elements.

Terms such as first, second, A, and B may be used to describe various elements, but the elements should not be limited by the terms. The above terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, a first component may be referred to as a second component, and similarly, a second component may also be referred to as a first component. and/or includes a combination of a plurality of related listed items or any of a plurality of related listed items.

When a component is referred to as being “connected” or “connected” to another component, it may be directly connected or connected to the other component, but it is understood that other components may exist in between. it should be On the other hand, when it is said that a certain element is "directly connected" or "directly connected" to another element, it should be understood that the other element does not exist in the middle.

The terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present application, terms such as “comprise” or “have” are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one or more other features It is to be understood that this does not preclude the possibility of addition or existence of numbers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and should not be interpreted in an ideal or excessively formal meaning unless explicitly defined in the present application. does not

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic diagram of a building shape simplification process of a building information model according to an embodiment of the present invention, and FIG. 2 is a block diagram of a building shape simplification system of a building information model according to an embodiment of the present invention. And Figure 3 is a schematic diagram of the original shape extraction process according to an embodiment of the present invention, 4 is an exemplary diagram of a surface classification process according to an embodiment of the present invention, FIG. 5 is an exemplary diagram of a basal stereoscopic segmentation process according to an embodiment of the present invention, and FIG. 6 is an exemplary diagram of a surface classification process according to an embodiment of the present invention It is an exemplary diagram of a segmented base stereoscopic selection process.

Referring to Figure 1, the building shape simplification process of the building information model according to the present invention is broadly viewed as a process of extracting the original shape from the BIM model, preprocessing the three-dimensional shape from the original shape, classifying the surface of the three-dimensional shape, generating a polyhedron, and simplifying the shape is composed of

2, the building shape simplification system 100 of the building information model according to an embodiment of the present invention includes a BIM database 110, a BIM reading module 120, an original shape extraction module 130, and a pre-processing module ( 140 ), a three-dimensional surface classification module 150 , a polyhedron generating module 160 , and a simplified shape acquiring module 170 .

Hereinafter, a detailed configuration will be described.

The BIM database 110 may be configured to store a building information model (BIM). The building information model includes design information of the target building.

The BIM reading module 120 may be configured to read the building information model from the building information model stored in the BIM database 110 .

The original shape extraction module 130 may be configured to extract the original shape from the building information model read by the BIM reading module 120 .

The original shape extraction module 130 may be configured to include a target space extraction unit 131 and an opening shape extraction unit 132 . Hereinafter, a detailed configuration will be described.

The target space extraction unit 131 may be configured to extract the target space from the building information model read by the BIM reading module 120 .

The opening shape extraction unit 132 may be configured to extract an opening shape including a door and a window from the building information model read by the BIM reading module 120 .

Here, with reference to FIG. 3 , information on the target space may be stored in the form of an IfcSpace class. In addition, the original shape extraction module 130 may extract the original shape by analyzing the structure of an Industry Foundation Classes (IFC) file, which is a storage format of the building information model.

In this case, in order to obtain information on the opening adjacent to the target space, information on the wall surrounding the space (IfcWall class) is first analyzed, and then the opening information (IfcOpeningElement) included in each wall may be extracted.

The original shape extraction module 130 may extract the original shape by analyzing the structure of an Industry Foundation Classes (IFC) file, which is a storage format of the building information model.

The pre-processing module 140 may be configured to perform pre-processing on the target three-dimensional shape from the original shape extracted by the original shape extraction module 130 .

The pre-processing module 140 may be configured to include a three-dimensional integration unit 141 and a surface grid shape storage unit 142 . Hereinafter, a detailed configuration will be described.

The three-dimensional integration unit 141 may be configured to combine the target space extracted by the target space extraction unit 131 and the shape of the opening extracted by the opening shape extraction unit 132 .

The surface grid shape storage unit 142 may be configured to store the object space and the opening shape integrated in the three-dimensional integration unit 141 in the form of a surface grid. That is, it may be configured to express the integrated target building shape in the form of a B-rep (Boundary Representation) to approximate the shape of a polyhedron. In addition, numerical errors such as minute gaps between surfaces may occur in the process of shape integration and polyhedron approximation. .

The three-dimensional surface classification module 150 may be configured to classify the three-dimensional surface of the target three-dimensional shape that has been pre-processed in the pre-processing module 140 into a main surface, a surface to be omitted, and an opening surface.

The three-dimensional surface classification module 150 may be configured to include a distance/angle reference setting unit 151 , a main surface specifying unit 152 , an opening surface specifying unit 153 , and an omission target surface specifying unit 154 . Hereinafter, a detailed configuration will be described.

The distance/angle reference setting unit 151 may be configured to set a distance reference and an angle reference of surface integration for setting the degree of shape simplification.

The major surface designator 152 may be configured to designate a major surface of the target three-dimensional shape on which the pre-processing is performed in the pre-processing module 140 .

The opening surface designation unit 153 may be configured to designate the opening surface of the target three-dimensional shape on which the pre-processing is performed in the pre-processing module 140 .

The omission target surface designation unit 154 may be configured to designate the omit target surface of the target three-dimensional shape on which the pre-processing is performed in the pre-processing module 140 .

More specifically, since the opening has a great influence on the simulation of the building environment, the shape of the opening is excluded from the simplification target, and the surface of the remaining wall can be configured to be classified through the following process. 4 shows the process of surface classification.

1) First, calculate area (a) and surface p for all surfaces.

는 표면

의 지표,

는 표면

의 면적,

는 표면

의 단위 법선 벡터이다.here,

silver surface

indicator of,

silver surface

the area of

silver surface

is the unit normal vector of .

)과 지표

에 따라 내림차순으로 정렬한다.2) and all surfaces by area (

) and indicators

sort in descending order according to

으로 지정하고 주요 표면으로 분류한다.3) And the first surface among the unclassified surfaces

and classified as a major surface.

을 제외한 모든 표면에 대해 다음 과정을 반복한다.4) and

Repeat the following process for all surfaces except .

라고 둘 때,

과

에 대해 다음 두 변수를 계산한다.4-1) Here, the target surface

When you say

class

Calculate the following two variables for

는 표면

(

)의 중심이다.here,

silver surface

(

) is the center of

를 생략 대상 표면으로 지정한다.4-2) And if all negative conditions are satisfied

is designated as the target surface to be omitted.

5) And repeat 3) and 4) until all target surfaces are classified as major or omitted target surfaces.

The polyhedron generating module 160 may be configured to generate a polyhedron to construct a simplified shape by using the three-dimensional surface classified by the three-dimensional surface classification module 150 .

The polyhedron generating module 160 includes a bounding box generating unit 161 , a base three-dimensional shape forming unit 162 , a base three-dimensional shape dividing unit 163 , a base three-dimensional shape plane dividing unit 164 , and an original shape contrasting unit 165 . , it may be configured to include a three-dimensional shape selection unit 166 . Hereinafter, a detailed configuration will be described.

The bounding box generator 161 may be configured to generate a bounding box having a minimum size surrounding the target three-dimensional shape.

The base three-dimensional shape forming unit 162 may be configured to form a base three-dimensional shape having the same center and double the size of the bounding box generated by the bounding box generating unit 161 .

The base three-dimensional shape dividing unit 163 may be configured to divide the base three-dimensional shape formed by the base three-dimensional shape forming unit 162 . Figure 5 illustrates the division of the underlying three-dimensional shape.

The base three-dimensional shape plane dividing unit 164 may be configured to divide the main surface designated by the main surface designator 152 into an expanded plane in the base three-dimensional shape divided by the base three-dimensional shape dividing unit 163 .

The original shape contrast unit 165 may be configured to contrast the base three-dimensional shape divided by the base three-dimensional shape plane dividing unit 164 and the original shape.

The three-dimensional shape selection unit 166 may be configured to calculate a ratio overlapping the original shape among the volumes of the base three-dimensional shape as a result of the comparison of the original shape contrast unit 165, and select a solid having a ratio of 50% or more as a result of the calculation. 6 shows a screen in which a divided base company is selected.

The simplified shape obtaining module 170 may be configured to obtain a simplified shape by combining selected solids according to the polyhedral generation result of the polyhedral generating module.

7 is a flowchart of a method of simplifying a building shape of a building information model according to an embodiment of the present invention.

Referring to FIG. 7 , the BIM reading module 120 reads the building information model from the building information model previously stored in the BIM database 110 ( S101 ).

Next, the original shape extraction module 130 extracts the original shape from the building information model read by the BIM reading module 120 ( S102 ).

Next, the simplified shape acquisition module 170 acquires a simplified shape from the building information model read by the BIM reading module 120 ( S103 ).

Although described with reference to the above embodiments, those skilled in the art can understand that various modifications and changes can be made to the present invention without departing from the spirit and scope of the present invention as set forth in the following claims. There will be

110: BIM database
120: BIM read module
130: original shape extraction module
131: target space extraction unit
132: opening shape extraction unit
140: preprocessing module
141: three-dimensional integration unit
142: surface grid shape storage unit
150: three-dimensional surface classification module
151: distance / angle reference setting unit
152: major surface designation
153: opening surface designation part
154: Skip target surface designation part
160: polyhedron generation module
161: bounding box generator
162: base three-dimensional shape forming part
163: base three-dimensional shape division part
164: base solid shape plane division part
165: original shape contrast part
166: three-dimensional shape selection unit
170: simplified shape acquisition module

Claims (4)

a BIM database in which a building information model (BIM) is stored;
a BIM reading module for reading a building information model from the building information model stored in the BIM database;
The building shape simplification system of the building information model including an original shape extraction module for extracting the original shape from the building information model read by the BIM reading module.
According to claim 1,
The building shape simplification system of the building information model, characterized in that it further comprises a simplified shape acquisition module for acquiring the simplified shape from the building information model read by the BIM reading module.
reading, by the BIM reading module, the building information model from the building information model stored in advance in the BIM database;
A building shape simplification method of a building information model, comprising the step of extracting, by an original shape extraction module, an original shape from the building information model read by the BIM reading module.
4. The method of claim 3,
The building shape simplification method of the building information model, characterized in that the simplified shape acquisition module further comprises the step of acquiring the simplified shape from the building information model read by the BIM reading module.

Images