CN113536438B - BIM model rapid construction method based on national power grid GIM standard - Google Patents
BIM model rapid construction method based on national power grid GIM standard Download PDFInfo
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- CN113536438B CN113536438B CN202110854708.3A CN202110854708A CN113536438B CN 113536438 B CN113536438 B CN 113536438B CN 202110854708 A CN202110854708 A CN 202110854708A CN 113536438 B CN113536438 B CN 113536438B
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Abstract
The invention relates to a method for quickly constructing a BIM model based on the national grid GIM standard, which solves the problem that a GIM file cannot be directly imported into BIM software for application. The invention comprises the following steps: s1, analyzing a GIM file based on a national grid GIM standard, and extracting to obtain attribute parameters, hierarchical structure relations and graphic primitive geometric parameters of the GIM file; s2, calling a BIM software API to complete BIM physical model construction based on the extracted primitive geometric parameters; s3, constructing a hierarchical structure of the constructed BIM physical model based on the extracted hierarchical structure relation; s4, mapping the extracted equipment and component attributes to the equipment and component unit model constructed in the step S3, so that a BIM model meeting the national grid GIM interaction specification is constructed. The invention can be widely applied to the analysis and construction process of each BIM software and three-dimensional graphics rendering software to the GIM equipment file.
Description
Technical Field
The invention relates to a BIM model rapid construction method, in particular to a BIM model rapid construction method based on the national grid GIM standard.
Background
The GIM file is a standardized three-dimensional model format, is a custom three-dimensional model interaction format formulated by a national power grid for solving the problem that a three-dimensional model cannot realize data exchange in different BIM software, and causes the loss of geometry and attribute information, and is similar to an IFC file format.
The GIM standard is a three-dimensional model format standard for the field of power transmission and transformation engineering, which is formally released by the national power grid in 2019. The GIM standard defines various entities, entity attributes and association relations among the entities of equipment in the field of power transmission and transformation engineering, and provides a standard for data expression and exchange for building BIM for the whole life cycle of power transmission and transformation.
However, the GIM standard, unlike IFC and other formats, is not as an international universal BIM standard, and has a plurality of open source libraries and commercial libraries, which can be directly opened and used by most BIM software, but needs to be resolved based on the national grid GIM standard and reconstructed according to the building rules of the BIM software model. Thereby limiting the popularization and use of the GIM standard in the market.
Disclosure of Invention
Aiming at the problems, the invention provides a BIM model rapid construction method based on the national grid GIM standard, so as to realize data circulation and exchange between the GIM model and other BIM software.
The technical scheme adopted by the invention is as follows: a method for quickly constructing a BIM model based on a national power grid GIM standard is characterized by comprising the following steps:
step S1, GIM file analysis: analyzing the GIM file based on the national grid GIM standard, and extracting to obtain attribute parameters, hierarchical structure relations and graphic primitive geometric parameters of the GIM file;
s2, building a BIM physical model: calling a geometric modeling engine API to complete BIM physical model construction based on the extracted primitive geometric parameters;
step S3, constructing a model hierarchy structure: performing hierarchical structure construction on the constructed BIM physical model based on the extracted hierarchical structure relation, and decomposing the physical model into three layers of tree-shaped structure unit models of equipment, components and primitives;
step S4, storing model attribute: mapping the extracted equipment and component attributes onto the equipment and component unit model constructed in the step S3, so as to construct a BIM model with definite hierarchical relation and detailed attribute information and meeting the national grid GIM interaction specification; the equipment attribute comprises information such as equipment name, model, voltage level, manufacturer and the like; the component attribute includes information such as device name information.
Further, in the step S1, the attribute parameters, the hierarchical structure relationship, and the primitive geometric parameters obtained by parsing are temporarily stored in the computer memory; the extracted attribute parameters of the GIM file comprise equipment attributes and component attributes; the extracted hierarchical structure relationship is hierarchical structure information among equipment, components and basic primitives for describing the model; the extracted primitive geometric parameters comprise parameter information describing primitive types, geometric dimensions, space transformation matrixes and the like.
Further, in the step S2, the building of the BIM physical model is completed through the building of the primitive geometric parameters; firstly, transferring the analyzed primitive type and geometric dimension parameter into a GIM primitive entity construction API to create a primitive geometric entity; secondly, transforming the constructed primitive entity by using a space transformation matrix, and finally completing the construction of the BIM physical model; the transformation includes at least one of coordinate translation, rotation, scaling transformation.
Further, in the step S3, the basis for constructing the model hierarchy is the hierarchy relationship obtained by parsing in the step S1; firstly traversing the primitives and determining the hierarchy of each primitive according to the hierarchy structure relation; secondly, combining the component hierarchy primitives into a component unit sub equipment according to the traversing result; the device level primitives and component units sub-Equipment are then combined into device units Equipment.
Further, in the step S4, the device attribute and the component attribute are stored in an editable manner in the device unit Equipment and the component unit sub Equipment, respectively.
The beneficial effects of the invention are as follows: the invention provides a method for quickly constructing a BIM model based on the GIM standard of a national power grid. By utilizing the method, BIM software with the three-dimensional solid modeling function can open the GIM file after secondary development, and a full-information BIM model with clear hierarchical structure and complete attribute information is constructed, thereby contributing to popularization and promotion of the national grid GIM standard.
Drawings
FIG. 1 is a flow chart of the method of the present invention;
FIG. 2 is a diagram of the structure of the attribute parameters of the method of the present invention;
FIG. 3 is a hierarchical relationship diagram of the method of the present invention;
FIG. 4 is a diagram of the geometry parameters of the primitives of the method of the present invention;
figure 5 is an assembled view of a shunt reactor model in an embodiment of the invention;
figure 6 is an exploded view of a shunt reactor model in an embodiment of the invention;
Detailed Description
In order to better understand the aspects of the present invention, the present invention will be described in further detail with reference to the accompanying drawings and detailed description. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Taking a shunt reactor model as an example, the embodiment realizes the rapid construction of a shunt reactor BIM model based on the national grid GIM standard, and according to the flow diagram of the invention, as shown in fig. 1, the method comprises the following operation steps:
step S1, GIM file analysis: the GIM file is formed by compressing a text file, and firstly, the parallel reactor GIM file needs to be decompressed to obtain text information which can be directly read by a computer; secondly, analyzing the parallel reactor GIM file based on the national power grid GIM standard, and extracting to obtain an attribute parameter A of the parallel reactor GIM file, as shown in figure 2; hierarchical relationship B, as shown in fig. 3; primitive geometry C, as shown in FIG. 4;
s2, building a BIM physical model of the shunt reactor: and calling a BIM software API to complete the construction of the BIM physical model of the shunt reactor based on the extracted primitive geometric parameter C. The geometric parameter C comprises parameter information describing primitive types, geometric dimensions, a space transformation matrix and the like. The parsing rules come from the definition of primitives in the GIM standard. Firstly, calling BIM software API to construct GIM primitive entity class; and secondly, transferring the extracted primitive types and primitive sizes into entity classes to construct primitive basic geometric entities. Then, coordinate and rotation transformation is carried out on the constructed primitive entity by utilizing a space transformation matrix, and finally, the construction of a BIM physical model of the shunt reactor is completed, as shown in fig. 5;
step S3, constructing a model hierarchy structure: and constructing a hierarchical structure of the constructed parallel reactor BIM physical model based on the extracted hierarchical structure relation B. The hierarchical structure relation B comprises hierarchical structure information describing tree shapes among model equipment, components and basic primitives: the base primitives are combined into components, which in turn are combined into devices. Firstly traversing the primitives and determining the hierarchy of each primitive according to the hierarchy structure relationship B; secondly, combining the component hierarchy graphic elements into a component unit of a body (1), a high-voltage sleeve (2), a conservator (3), a medium-voltage point sleeve (4), a radiator (5) and a terminal box (6) according to the traversing result, as shown in figure 6; combining the equipment level graphic element and the component unit into a parallel reactor equipment unit, and finally completing the construction of a physical model level structure;
and S4, mapping the extracted GIM attribute to the component units of the body (1), the high-voltage sleeve (2), the conservator (3), the medium-voltage point sleeve (4), the radiator (5) and the terminal box (6) constructed in the step S3. The GIM attribute comprises equipment attribute and component attribute, such as model number, unit and manufacturer of equipment; attribute information such as the name of the component. According to the hierarchical structure relation B, the extracted equipment attributes and the component attributes are stored on the shunt reactor component units and the shunt reactor equipment units in an editable mode;
through the specific implementation manner, the parallel reactor BIM model which accords with the national grid GIM interaction specification is finally constructed: the model assembly view is shown in fig. 5, and the model exploded view is shown in fig. 6.
Claims (3)
1. A BIM model rapid construction method based on a national power grid GIM standard is characterized by comprising the following steps:
step S1, GIM file analysis: analyzing the GIM file based on the national grid GIM standard, and extracting to obtain attribute parameters, hierarchical structure relations and graphic primitive geometric parameters of the GIM file;
s2, building a BIM physical model: calling a geometric modeling engine API to complete BIM physical model construction based on the extracted primitive geometric parameters;
step S3, constructing a model hierarchy structure: performing hierarchical structure construction on the constructed BIM physical model based on the extracted hierarchical structure relation, and decomposing the physical model into three layers of tree-shaped structure unit models of equipment, components and primitives;
step S4, storing model attribute: mapping the extracted equipment and component attributes onto the equipment and component unit model constructed in the step S3, so as to construct a BIM model with definite hierarchical relation and detailed attribute information and meeting the national grid GIM interaction specification; the equipment attributes comprise equipment names, models, voltage levels and manufacturers; the component attribute includes device name information;
in the step S2, the construction of the BIM physical model is completed through the construction of the geometric parameters of the graphic elements; firstly, transferring the analyzed primitive type and geometric dimension parameter into a GIM primitive entity construction API to create a primitive geometric entity; secondly, transforming the constructed primitive entity by using a space transformation matrix, and finally completing the construction of the BIM physical model; the transformation comprises at least one of coordinate translation, rotation and scaling transformation;
in the step S3, the basis for constructing the model hierarchy is the hierarchy relationship obtained by analysis in the step S1; firstly traversing the primitives and determining the hierarchy of each primitive according to the hierarchy structure relation; secondly, combining the component hierarchy primitives into a component unit sub equipment according to the traversing result; the device level primitives and component units sub-Equipment are then combined into device units Equipment.
2. The method for quickly constructing a BIM model based on the national grid GIM standard according to claim 1, wherein in the step S1, the analyzed attribute parameters, the hierarchical structure relationship, and the primitive geometric parameters are temporarily stored in the computer memory; the extracted attribute parameters of the GIM file comprise equipment attributes and component attributes; the extracted hierarchical structure relationship is hierarchical structure information among equipment, components and basic primitives for describing the model; the extracted primitive geometry parameters comprise description primitive types, geometry sizes and space transformation matrix parameter information.
3. The method for quickly constructing a BIM model based on the national grid GIM standard according to claim 1, wherein the device attribute and the component attribute in step S4 are stored in an editable manner in the device unit Equipment and the component unit sub Equipment, respectively.
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