CN111400389A

CN111400389A - IFC expansion-based operation and maintenance 5D-BIM data integration and sharing system

Info

Publication number: CN111400389A
Application number: CN202010218395.8A
Authority: CN
Inventors: 徐学东; 孙巍; 王善刚; 张晓庆
Original assignee: Changchun Institute of Applied Chemistry of CAS
Current assignee: Changchun Institute of Applied Chemistry of CAS
Priority date: 2020-03-25
Filing date: 2020-03-25
Publication date: 2020-07-10
Anticipated expiration: 2040-03-25
Also published as: CN111400389B

Abstract

The invention discloses an operation and maintenance 5D-BIM data integration and sharing system based on IFC expansion, wherein 5D-BIM is added with two dimensions of time dimension and monitoring sensing dimension on the basis of a BIM three-dimensional information model; the invention realizes the separation of BIM dimension extension and application logic, can dynamically construct instantiated entities and attribute objects according to IFC extension definition, links the existing 3D building information model with monitoring data and time progress data, and realizes the instance of a 5D-BIM model in a container; the tool provides a Web services interface, and an external application system can call the 5D-BIM model instance through the interface to realize operation and maintenance visualization. The operation and maintenance 5D-BIM data file in the IFC format can also be exported, and the operation and maintenance application system supporting the IFC format can be imported for direct application, so that the development of the operation and maintenance application system is obviously simplified.

Description

IFC expansion-based operation and maintenance 5D-BIM data integration and sharing system

Technical Field

The invention relates to the technical field of building information, in particular to an operation and maintenance 5D-BIM data integration and sharing system based on IFC expansion.

Background

Along with social development, the quantity and scale of construction projects are rapidly enlarged, and the operation and maintenance requirements of the construction projects are gradually highlighted. Particularly in the field of infrastructure represented by bridges, the traditional bridge operation and maintenance management and maintenance method relying on manpower and two-dimensional drawings is difficult to continue. The Building Information Modeling (BIM) is a digital expression of entity and functional characteristics of engineering project facilities, can realize complete description and recording of engineering objects, and is an effective solution for realizing full life cycle Information sharing and integrated management of a Building project.

The BIM core model diagram metadata structure is three-dimensional model data, and how to expand and integrate the BIM data according to the application requirements of different stages of the full life cycle is a key technical problem of popularization and application of the BIM technology. The extended integration of BIM and data has multiple ways, in which the close association of business data and BIM is realized, and the synchronized shared nD-BIM is considered to realize the standard mode of application-oriented BIM integrated management. At present, BIM has more integrated applications in construction period application fields such as construction, intelligent construction, cost control and the like, for example, companies such as Guangda, Luban and the like provide 4D BIM integrated products integrating a 3D information model and progress, 5D-BIM integrated products integrating the progress and cost, and the like. However, the research on the BIM extension integration application for operation and maintenance is not much, and no special technology and product are provided for solving the BIM extension integration problem for the operation and maintenance application.

In the current BIM application, the BIM data dimension extension is mainly implemented by adopting an IFC (Industry foundation classes) extension. The IFC is a BIM open data expression and exchange standard established by the International collaborative work alliance (IAI) and accepted by ISO, provides standard data definition, model and format for building information sharing exchange facing the full life cycle, is an important standard widely accepted for solving data exchange and interoperation between BIM software, and provides a technical framework for realizing BIM extension facing operation and maintenance.

The IFC standard is an object-oriented data model system, and can describe real physical objects and also express abstract concepts such as space, organizational relationships, processes, and the like. The description method of the information model consists of IFC entities, attributes and relations. The entity is a carrier of IFC information exchange, and other types of information exist as entity attributes in an attribute value mode. The structure is beneficial to establishing a clear framework and an information expression mechanism, and the IFC entity is conveniently expanded. Because the life cycle of the building engineering is long, the related application links are more, the information quantity is huge, and the IFC standard cannot cover the expression of various application demand entities. The latest version of IFC4 ADD2 contains 812 entity definitions. When the defined entity type can not meet the requirement, the entity type can be expanded according to the requirement.

In order to meet the requirements of different fields, the IFC provides three extension mechanisms, namely extension based on an IFCProxy entity, extension based on an attribute set and extension based on a newly added entity. And a foundation is provided for building the multidimensional information model integration based on the component entity. The three extension methods can be used for dimension extension of the BIM information model.

At present, foreign nD-BIM data integration management platforms comprise products such as IFC Model Server, EDM Model Server, Eurostep and the like, BIM dimension expansion focusing on a specific application direction, and BIM data sharing exchange and associated storage of a plurality of BIM models among different applications, domestic products such as L uban Cooperation collaboration platform, Guangdong BIM5D construction collaboration management platform, and Yunjin 4D BIM platform focusing on BIM dimension expansion and data integration aiming at specific applications such as cost, progress and the like, and can not provide a multiplexing technical framework for certain field applications.

(1) The existing nD-BIM extension and data integration are realized in specific application software, the dimension extension of BIM and application logic are highly integrated, cannot be separated, the multiplexing degree is very low, and the sharing of a BIM extension model cannot be provided for other related applications.

(2) The demands of the operation and maintenance stage of the building engineering are various, the related fields are more, such as monitoring, management and maintenance, security protection, fire protection and the like, although the BIM data integration form is close to that, the application difference is larger, and the development mode of high integration of the BIM and the application logic causes great software development difficulty and workload, so that the popularization of the BIM in the operation and maintenance stage is not facilitated.

(3) At present, BIM application and research are still focused on the design and construction stage, and BIM application products facing operation and maintenance are lacked.

Disclosure of Invention

The invention aims to provide an operation and maintenance 5D-BIM data integration and sharing system based on IFC extension aiming at the development requirement of a BIM application system in an operation and maintenance stage, which can realize the separation of BIM dimension extension and application logic, remarkably simplify the development of the operation and maintenance application system and improve the development efficiency.

The operation and maintenance 5D-BIM data integration and sharing system based on IFC extension provided by the embodiment of the invention comprises:

the system comprises a 5D-BIM entity integration containerization component, an IFC object persistence component, an IFC analysis component, an IFC conversion component, an extension IFC conversion component, a 5D-BIM visual object interface, a 5D-BIM IFC generation component, an access control component, a business database and a BIM database;

wherein:

the 5D-BIM entity integration containerization component is used for acquiring various basic data from the IFC object persistence component, the IFC analysis component and the extension IFC conversion component, instantiating the entity object in the container according to the IFC standard, completing data integration of a 3D model, a time dimension and a sensing dimension, and expressing and operating the 5D-BIM object;

the IFC object persistence component is used for realizing 5D-BIM object persistence, establishing a mapping relation with a corresponding table of a relational database, and providing a bottom information model and data support for each application system through self management and database operation of the persistence component; accessing a business database and a BIM database through the access control component;

the IFC analysis component interacts with the 5D-BIM entity integration containerization component, reads and analyzes an IFC file generated by BIM information models of BIM modeling software or application systems, generates service information according to IFC standards, sends the service information to the 5D-BIM entity integration containerization component, and instantiates an entity object defined by the IFC file;

the IFC conversion component has an interface with the 5D-BIM entity integration containerization component, converts a common non-IFC format geometric model into an IFC format model through a defined data mapping relation, analyzes the IFC format model, generates service information according to an IFC standard, sends the service information to the 5D-BIM entity integration containerization component, and instantiates an entity object defined by an IFC file;

the extension IFC conversion component has an interface with the monitoring sensing application system and the 5D-BIM entity integrated containerization component and is used for definition analysis and instantiation of an IFC extension file; completing the docking and data query of the relational database through an IFC object persistence component;

the 5D-BIM visual object interface is connected with the 5D-BIM entity integration containerization component, establishes a tree structure instantiation object of the 5D-BIM integration model according to an IFC standard, packages the tree structure instantiation object into Web Services and provides a public interface;

the 5D-BIM IFC generation component has an interface with the 5D-BIM entity integration containerization component, and exports the 5D-BIM object in the container into a 5D IFC file in a format defined by IFC, so that other BIM application software can share the 5D information model conveniently;

the access control component is used for establishing the relationship between the entity data model and the user role authority, controlling the access of the application system user to the 5D-BIM and interacting with the IFC object persistence component;

the business data which is related to the application system related to the business database storage, transportation and maintenance and the BIM model data is provided with data access service through the access control component;

the BIM database is a relational database for storing the IFC files of the BIM model data submitted in different stages and different applications, and provides data adding, deleting, modifying and querying operations of various data for the persistence component; data access services are provided through access control components.

In one embodiment, the process of the extended IFC conversion component for IFC extension file definition parsing and instantiation includes:

s51, analyzing the IFC extension file by using the IFC analysis component to obtain newly added entity and attribute object information;

s52, verifying the correctness of the IFC extension format;

s53, if the verification is passed, instantiating the entity and the attribute object in the 5D-BIM entity integration containerization component; if the verification is not passed, returning extension verification error information and guiding to modify the extension model definition file.

In one embodiment, S52 verifies the IFC extension format correctness, including:

checking whether the IFC file geometric model is correct;

checking whether an extended IFC entity exists;

checking whether the extended entity attribute exists;

and checking whether the attribute value meets the requirement.

In one embodiment, the flow for the IFC object persistence component to implement 5D-BIM object persistence is as follows:

s21, initializing the persistent object, reading the object-relationship mapping configuration file information to the attribute of the persistent object;

s22, creating a data source proxy object;

s23, creating a database operation object by the data source proxy object, and establishing database connection; creating a data source object;

s24, establishing a transaction object when the access data requirement exists in each entity object or attribute object of the BIM, generating an SQ L statement by the database operation object to perform the operation of adding, deleting, modifying and checking the database table, and updating the database table into a data source object;

and S25, after the persistence operation is finished, submitting the transaction and closing, and closing the data source object and disconnecting the database.

In one embodiment, the IFC object persistence component comprises:

object-relationship mapping object: according to the instantiated entity object and the attribute, establishing a mapping relation between an entity object data model and a relation data model, and realizing the butt joint of the object and a relation data table;

a persistence manager: the persistence manager manages the connection and access logic of the persistence component to the relational database.

In one embodiment, a 5D-BIM entity integrated containerization component, comprising:

data integration object: instantiating a newly added object according to IFC entity extension and attribute extension, and establishing data association of a 3D information model, sensing data and time progress data;

the transaction object: and recording data model information of the current operation, including object instances and associated data tables.

In one embodiment, the sharing system adopts an IFC entity extension and attribute extension method, and realizes the integration and sharing of 5D-BIM data facing operation and maintenance monitoring application based on a relational database and an object-relational mapping persistence method; the 5D-BIM data integration method comprises the following steps:

s10, reading the IFC file by using an IFC analysis component, or converting the three-dimensional data model file in the non-IFC format by using an IFC conversion component; instantiating an IFC information model in a container, establishing a data table through an IFC object persistence component, or establishing association in the existing data table to update data;

s20, reading and checking an IFC extension model definition file by using an extension IFC conversion component, and instantiating an extended entity object and attribute; reading monitoring sensing data in a monitoring system and time progress data in a project management system;

s30, establishing a 5D-BIM data model in the 5D-BIM entity integrated containerization assembly according to the incidence relation between the three-dimensional model entity object defined by the IFC extended model definition file and the monitoring sensing data and the incidence relation between the three-dimensional model entity object and the time progress data;

s40, establishing an association view of the monitoring sensing data, the time progress data and the 3D information model data table through the persistent object; realizing the storage of 5D-BIM model data in a relational database;

and S50, monitoring the regular update of the sensing data, and regularly updating the data of the 5D-BIM entity object and the relational database by the persistence manager to ensure that the data of the 5D-BIM model is updated and stored.

In one embodiment, among others, a 5D-BIM data sharing method includes the steps of:

s100, selecting a BIM model to be shared, and inquiring whether the model has a corresponding IFC extension definition file instance by a 5D-BIM entity integration containerization component;

s200, if the definition file is not extended, obtaining the latest BIM model data through the IFC object persistence component, rebuilding the model in the 5D-BIM entity integration containerization component, and converting the model into the IFC file;

s300, if the extension definition file exists, obtaining the latest BIM model data and business data through the IFC object persistence component, rebuilding the 5D model in the 5D-BIM entity integration containerization component, and converting the 5D model into a 5F-IFC file.

In one embodiment, the access control component comprises:

all the IFC file analysis, instantiation, BIM model query and data integration operations are carried out, user permission information is read, and if no permission exists, related files or operations cannot be executed;

and reading the user permission information by performing IFC file generation and 5D-BIM visual object generation operations, wherein if no permission exists, the related files or operations cannot be executed.

The technical scheme provided by the embodiment of the invention has the beneficial effects that at least:

the operation and maintenance 5D-BIM data integration and sharing system based on IFC extension provided by the embodiment of the invention is characterized in that 5D-BIM is added with two dimensions of time dimension and monitoring sensing dimension on the basis of a BIM three-dimensional information model; the invention realizes the separation of BIM dimension extension and application logic, can dynamically construct instantiated entities and attribute objects according to IFC extension definition, links the existing 3D building information model with monitoring data and time progress data, and realizes the instance of a 5D-BIM model in a container; the tool provides a Web services interface, and an external application system can call the 5D-BIM model instance through the interface to realize operation and maintenance visualization. The operation and maintenance 5D-BIM data file in the IFC format can also be exported, and the operation and maintenance application system supporting the IFC format can be imported for direct application, so that the development of the operation and maintenance application system is obviously simplified.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic diagram of an overall application architecture of an IFC extension-based operation and maintenance 5D-BIM data integration and sharing system according to an embodiment of the present invention;

FIG. 2 is a flow chart of 5D-BIM persistence provided by an embodiment of the present invention;

fig. 3 is a flowchart illustrating IFC extension file definition parsing and instantiation according to an embodiment of the present invention;

fig. 4 is an IFC system diagram of a newly added monitoring sensing entity according to an embodiment of the present invention;

FIG. 5 is a diagram of an entity attribute expansion architecture for time scheduling according to an embodiment of the present invention;

FIG. 6 is a flow chart of "3D model + time dimension + sensing dimension" 5D-BIM data integration according to an embodiment of the present invention;

FIG. 7 is a flowchart of importing a data model according to an embodiment of the present invention;

fig. 8 is a flowchart of data model derivation according to an embodiment of the present invention.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

Referring to fig. 1, the operation and maintenance 5D-BIM data integration and sharing system based on IFC extension provided by the embodiment of the present invention can implement data integration of an operation and maintenance 5D-BIM model, including implementing import of BIM data in an IFC format, association integration of an operation and maintenance-oriented BIM three-dimensional information model with monitoring sensing data and time schedule data, BIM data persistence based on a relational database, integration and visual modeling of 5D-BIM data, and generation and sharing of a 5D-BIM IFC file. The system comprises the following components:

1. 5D-BIM entity integration containerization component

And the system core component is used for expanding the initialization, integration and operation environment of the BIM entity object. Interacting with an IFC object persistence component 2, an IFC parsing component 3, an IFC translation component 4, an extended IFC translation component 5, a 5D-BIM visual object interface 6, and a 5D-BIMIFC generation component 7. Acquiring BIM basic data from the IFC object persistence component 2, the IFC analysis component 3 and the extension IFC conversion component, instantiating the entity object in the container according to the IFC standard, completing data integration of the 3D model, the time dimension and the sensing dimension, and expressing and running the 5D-BIM object. The technical support of generation, query, calling, IFC conversion and the like of the visualization model can be provided for the upper-layer operation and maintenance application system through the 5D visualization object interface 6, the 5D-BIM IFC generation component 7 and the like.

2. IFC object persistence component

The system core component realizes 5D-BIM object persistence, establishes a mapping relation with a corresponding table of a relational database, and provides a bottom information model and data support for each application system through self management and database operation of the persistence component. In order to simplify the development of an upper-layer application system, the component adopts the persistence of component management, namely the persistence state is managed and maintained by the component, the access to a relational database is completed, and the data synchronization is ensured. When the sensing data in the service database 9 changes, the components perform synchronous update and integration with the BIM. The application system need only reference the component and need not write the logic to access the BIM database 10. Through the IFC object persistence component 2, the 5D-BIM object is guaranteed to be alive in the container for a long time, and is automatically updated with sensing data.

3. IFC analysis component

And interacting with the 5D-BIM entity integration containerization component 1, reading and analyzing an IFC file generated by BIM modeling software or a BIM information model of an application system, generating service information according to an IFC standard, sending the service information to the 5D-BIM entity integration containerization component 1, and instantiating an entity object defined by the IFC file.

4. IFC conversion assembly

An interface exists between the 5D-BIM entity integration containerization component 1 and the interface, common non-IFC format geometric models are converted into IFC format models through a defined data mapping relation, analysis is carried out, service information is generated according to IFC standards and sent to the 5D-BIM entity integration containerization component 1, and entity objects defined by IFC files are instantiated.

5. Extended IFC translation component

An interface exists between the monitoring sensing application system and the 5D-BIM entity integrated containerization component 1, an IFC extended entity and an Express file of an attribute are read in, verification and analysis are carried out, data of an extended dimension are read from a service database according to the extended entity and the attribute, and the butt joint and data query of a relational database are completed through the IFC object persistence component 2. Converting the read application data into an IFC file, establishing an object mapping relation, generating service information, sending the service information to the 5D-BIM entity integration containerization component 1, and instantiating a sensing dimension entity object defined by the IFC file.

6. 5D-BIM visual object interface

An interface exists between the 5D-BIM entity integration containerization component 1 and a tree structure instantiation object of the 5D-BIM integration model is established according to an IFC standard, the tree structure instantiation object is packaged into Web Services, a public interface is provided, and an upper-layer operation and maintenance application system call interface can obtain a 5D-BIM integration model example and visually display the 5D-BIM integration model example.

7. 5D-BIM IFC generation component

An interface exists with the 5D-BIM entity integration containerization component 1, 5D-BIM objects in the container are exported into a 5D IFC file in a format defined by IFC, and other BIM application software can share the 5D information model conveniently.

8. Access control component

And establishing a relation between the entity data model and the user role authority, and controlling the access of the application system user to the 5D-BIM, including access check of the BIM, access query of time-related planning tasks and access query of monitoring sensing data. And reconstructing a 5D-BIM visual model or an IFC file through the 5D-BIM entity integration containerization component 1, and providing the 5D-BIM visual model or the IFC file to each application system through an interface according to the authority.

9. Service database

And storing business data which are related to the application system related to operation and maintenance and BIM model data, including time-related task plan data, monitoring sensing data and the like.

10. BIM database

A relational database of BIM model data (IFC) files submitted at different stages and for different applications. The data table is established according to the IFC entity object and the entity attribute, and embodies the characteristics of inheritance, aggregation, synthesis and the like of the entity class. And through an object-relation mapping algorithm, data adding, deleting, changing and querying operations of various types of data are provided for the persistence component.

The operation and maintenance 5D-BIM data integration and sharing system based on IFC extension provided by the embodiment of the invention can change the development current situation of a BIM application system, realize BIM dimension extension and application logic separation, and provide an integration tool of the operation and maintenance 5D-BIM for simplifying BIM application in an operation and maintenance stage. The operation and maintenance application system can directly call the instance through the interface, and also can export the IFC format file for other application systems to use.

The IFC extension-based operation and maintenance 5D-BIM data integration and sharing system can realize functions of checking, analyzing and converting an IFC extension definition Express file, converting a non-IFC three-dimensional model, integrating and persisting 5D-BIM data, generating a 5D-BIM visual object, generating a 5D-IFC file, controlling access and the like on the basis of a relational database. And 5D-BIM data models of '3D information model + time dimension + sensing dimension' and data integration sharing technical support are provided for constructing the operation and maintenance-oriented BIM application.

Further, the above IFC object persistence component 2 aims to simplify the design of the integrated containerized component, and introduces the concept of persistence, that is, a persistent object implementing 5D-BIM in this component establishes a mapping relationship with a corresponding table of a relational database, and the persistent component performs operations from the administrative and database, and provides underlying information models and data support for each application system, so that the integrated containerized component focuses on the integration, security and transaction of data. The method specifically comprises the following steps:

(1) object-relationship mapping object: and according to the instantiated entity object and the attribute, establishing a mapping relation between the entity object data model and the relation data model, and realizing the butt joint of the object and the relation data table. The algorithm flow is as follows:

1) reading an initialized entity object a in the container, connecting a corresponding entity table Sa, and if the table does not exist, executing the step 3);

2) checking entity attributes of a, connecting a corresponding attribute table Pa, and if the table does not exist, executing step 4); the entity and the attribute are in one-to-many or many-to-many relationship, and step 5) is executed;

3) and newly building a table Sa, creating fields and field types according to entity data types, checking the inheritance relationship of the entities, and enabling a sub-entity table to comprise parent entity fields.

4) Establishing a new table Pa, establishing fields and field types according to the attribute data types, and reading the inheritance tree of the attributes;

5) and creating a view Ma, and establishing the relationship between Sa and Ea in the view according to the relationship between the entity and the attribute.

And establishing the corresponding relation between each element of the IFC and each table in the relational database through the mapping algorithm.

The specific working steps are as follows:

a, establishing object-relation mapping, and establishing a corresponding data table in a memory;

b, connecting a database and constructing an SQ L statement;

c, accessing the database, adding, deleting, modifying and checking operations to the example data table, and extracting data to the memory;

d filling the read data into the object attribute field.

Through the object-relationship conversion process, the persistence mainly completes the conversion and reconstruction process of the object, and the process is as follows: the application program initializes the instance object from the class, and reads the data from the relational database and fills the data into the attribute field of the object.

(2) A persistence manager: the persistence manager manages the connection and access logic of the persistence component to the relational database. Operations on the relational database are ensured to be separated from the integrated containerization component. Common data persistence approaches:

1) IFC file-based persistence

The 5D-BIM data model is stored in an IFC file mode and managed in a file server mode, the mode is simple and practical, but for BIM application with high general complexity, the IFC file data volume is huge, and the format is complex. This approach is inefficient and does not meet the requirements of real-time operation.

2) Database-based persistence

Databases are divided into object-oriented databases and relational databases. Since the IFC describes an object information model, the application of the object-oriented database to store 5D-BIM data is convenient and efficient. But the object-oriented database technology and products are not mature enough, and the development cost is high. In comparison, relational databases have powerful performance and high complex transaction processing capability. The BIM model, as developed by Autodesk Revit, is the application of a relational database to store 3D models.

The embodiment of the invention selects the relational database to realize the object persistence. The method comprises the steps of establishing a mapping algorithm from an IFC data model to a relational data model through an object-relational mapping object, mapping entities into tables in a relational database, realizing inheritance relations among the entities through sub-tables including fields in a parent table, establishing relations among data formats of various entity types of the IFC, the relational database data tables and the field formats, and establishing the IFC metadata model.

Referring to fig. 2, the 5D-BIM persistence process specifically includes:

s21, initializing the persistent object, and reading the 'object-relation mapping' configuration file information into the attributes of the persistent object.

S22, creating a data source proxy object, and for each component in the container, the proxy object is used as a virtual object database.

S23, creating a database operation object by the data source proxy object, and establishing database connection; data source objects are created, which exist in memory for a long time, acting as an object format database.

S24, the BIM entity objects or attribute objects have access data requirements, a transaction object is created, the database operation object generates SQ L statements to carry out addition, deletion, modification and check operations on the database table and update the database tables to the data source object.

Further, the 5D-BIM entity integrated containerization component 1 includes:

data integration object: and instantiating the newly added object according to the IFC entity extension and the attribute extension, and establishing data association of the 3D information model, the sensing data and the time progress data.

The transaction object: and recording the data model information of the current operation, including the object instance and the associated data table, and ensuring that other users cannot modify the data model when the operation performed by the data model is not completed.

Referring to fig. 3, a process for verifying a conversion component for an extended IFC includes: (1) analyzing the IFC extension file by using an IFC analysis component to obtain newly added entity and attribute object information; (2) the IFC extension format correctness is verified, and the method comprises the following 4 aspects: 1) checking whether the IFC file geometric model is correct; 2) checking whether an extended IFC entity exists; 3) checking whether the extended entity attribute exists; 4) checking whether the attribute value meets the requirement; (3) entities and property objects are instantiated in the integrated containerized component, such as by validation. If the verification is not passed, returning extension verification error information and guiding to modify the extension model definition file.

Referring to fig. 4, a 5D-BIM operation and maintenance monitoring sensing dimension expansion system diagram is shown, and because the operation and maintenance management requirements of different building projects are different greatly, the contents of operation and maintenance management dimension expansion also have great difference. The invention can read into an IFC extension definition file of the self-definition and generate the nD-BIM model according to the definition. In the following embodiments, the method of extension is described only by taking a newly added bridge monitoring sensing dimension as an example, and does not represent that the present invention only supports the extended entities and attributes in the embodiments.

The meaning of the representation of the english vocabulary appearing in fig. 4 is explained as follows:

ifclelement entity: an IFC abstract parent class; IfcDistributionElement: IFC electrical, communication type entity;

the following are all custom entities: newIfcBMSEgment: a bridge structure monitoring system entity;

newIfcBMSSensor: a bridge monitoring sensor entity;

newIfcBMSSenser-L oad bridge load monitoring sensor entity, derive:

newIfcStressSensor: a stress sensor; newIfcPressensor: a pressure sensor;

newifcAccelersensor: an acceleration sensor; newIfcVibraSensor: a vibration speed sensor;

newifcvvehicwsensor: an automotive weighing sensor; newIfcSpeedsensor: a vehicle speed sensor;

newIfcBMSSenser _ Stru: a bridge structure monitoring sensor entity; derivation:

newIfcDeformSensor: a deformation sensor; newIfcTiltsensor: a tilt sensor;

newIfcMyotionsensor: a displacement sensor; newIfcAngleSensor: a rotation angle sensor;

newIfcCrackSensor: a crack sensor;

newIfcBMSSenser _ Envi: a bridge environment monitoring sensor entity; derivation:

newifcHumiditySensor: a humidity sensor; newifcttempera sensor: a temperature sensor;

newIfcWindSSensor: a wind speed sensor; newIfcWindDSensor: a wind direction sensor;

newifcvvehicwsensor: a seismic sensor;

in the IFC4 standard, a sensor entity IFCSensor is provided, but the definition and attributes thereof are not suitable for the description requirements of the operation and maintenance monitoring sensor. In view of this, the invention selects a new entity adding mode to expand the IFC, and realizes the five-dimensional BIM application facing the bridge operation and maintenance monitoring.

According to the dividing mode, a new bridge structure monitoring system entity newIfBMSEement is added, inherits the IfDistributionElement, derives a bridge monitoring sensor entity newIfBMSSensor, then newly adds three bridge monitoring sensor entities newIfBMSSenser _ L oad, newIfSSenser _ Stru and newIfBMSSenser _ Envi which are abstract superclasses and inherit the newIfBMSSensor to derive three concrete sensor entity classes.

(1) Bridge load monitoring sensor entity newIfcBMSSenser _ L oad

According to the requirement of bridge load monitoring, a plurality of specific sensor entities are derived, wherein the specific sensor entities comprise a stress sensor, a pressure sensor, an acceleration sensor, a vibration speed sensor, an automobile weighing sensor, an automobile speed sensor and the like, and all the specific sensor entities are inherited to newIfcBMSSenser _ L oad.

(2) Bridge structure monitoring sensor entity newIfcBMSSenser _ Stru

According to the requirement of bridge structure monitoring, specific sensor entities such as a deformation sensor, an inclination sensor, a displacement sensor, a corner sensor, a crack sensor and the like are derived and are inherited from newIfcBMSSenser _ Stru.

(3) Bridge environmental monitoring sensor entity newIfcBMSSenser _ Envi

According to the requirement of bridge environment monitoring, specific sensor entities such as a humidity sensor, a temperature sensor, a wind speed sensor, a wind direction sensor, a seismic sensor and the like are derived and are inherited to newIfcBMSSenser _ Envi.

After the entities are added according to the IFC standard and the entity and inheritance relationship are described through the EXPRESS language, the attribute information of the added entities needs to be further defined. The IFC4 standard defines 9 attribute sets related to sensors, which covers the electrical, environmental, product, etc. attribute information of the sensors, but lacks the performance information of the bridge operation and maintenance monitoring sensors, so that a new performance attribute set needs to be added in combination with the aforementioned specific sensor entities. The invention defines a Pset _ SensorPerformance attribute set which is suitable for the three bridge monitoring sensor entities, and the main attributes of the performance attribute set of the bridge operation and maintenance monitoring sensor comprise: data format, accuracy, range, resolution, linearity, sensitivity, operating temperature, zero drift, response time, stability, time constant, etc.

In use, custom extended entities and properties require that Entity (Entity) and Type (Type) information be added to its parent object and property definitions in the EXPRESS file. And a relation is established with an information model component for installing a sensor, so that the 4D-BIM construction of a 3D information model and a sensing dimension can be completed, and the sensing information expression based on the IFC standard is realized.

Referring to fig. 5, the requirement of the operation and maintenance application for the time dimension is also diversified for the time schedule entity attribute extension architecture. The invention can read into an IFC extension definition file of the self-definition and generate the nD-BIM model according to the definition. In the following embodiments, the method for expanding is described only by taking the new task progress dimension as an example, and does not represent that the present invention only supports the entity and attribute of the expansion in the embodiments.

The meaning of the representation of the appearing english vocabulary in fig. 5 is explained as follows:

ifccschedulingtime: an IFC plan time abstract entity; IfcProcess: an IFC process abstraction entity; IfcTask: ifc abstract task entity; IfcRecConnects: IFC connecting relation entities; IfcTaskTimeRecurring is an IFC task progress period entity;

IfcTaskTime: a task progress entity; the attributes include: schedule (scheduled start time), schedule finish (scheduled end time), schedule duration, ActualStart (time start time), actualpfinish (actual end time), actualpduration, FreeFloat (free time difference), Completion (Completion).

IfcRelSequence, multitask logical relationship entity, attribute including SequenceType: relationship type, Time L ag: lag Time, UserDefineSequenceType: user defined relationship type, etc.

The 4D BIM with the additional time dimension is successfully applied to the construction process management, and the method mainly comprises the steps of decomposing a three-dimensional building information model required by the construction process, associating the model primitive component with the construction progress by taking the model primitive component as a basic unit, and realizing the simulation and management according to the construction progress of a building project. The concerned operation and maintenance time dimension is mainly related to the schedules of normal state monitoring, maintenance tasks, maintenance plans and the like, the schedules are defined as tasks, and the time attribute is the core attribute characteristic of the tasks.

The IFC4 standard defines an ifccschedulingtime abstract parent class, derives an IfcTaskTime entity, can describe the progress of various work tasks, and normal state monitoring can also be regarded as a long-time work task. The invention defines the selectable parameters of the task progress entity IfcTaskTime, and the attributes of the progress are divided into seven, namely schedule start (planned start time), schedule finish (planned end time), schedule duration, actualStart (actual start time), actualDuration (actual duration), FreeFloat (free time difference) and Completion. For multiple tasks, plans or applications with parallel or contextual progress, IfcRelSequence is used for defining the logical relation among multiple tasks, and the defining parameters comprise an antecedent task, a successor task, a task logical type, a task time interval and the like.

Defining an abstract entity IfcOperationAintenance record as an operation and maintenance progress entity, and deriving two entities IfcDaily Monitoring (daily Monitoring time entity); ifcmaintence (repair time entity); the ifcmaintence includes a repair phase entity below, a repair team entity ifcmaintencepteam, which records repair team information, ifcmaintencephem is a repair schedule entity, and ifcmaintencepplan is a repair planning entity.

In use, custom extended entities and properties require that Entity (Entity) and Type (Type) information be added to its parent object and property definitions in the EXPRESS file. And a relation is established with a model component related to the maintenance progress, so that the 4D-BIM construction of a 3D information model and a time dimension can be completed, and the sensing information expression based on the IFC standard is realized.

Referring to fig. 6, a schematic diagram of a process of integrating BIM data in "3D model + time dimension + sensing dimension" 5D-BIM data "is shown, a containerization component can read in a BIM model file in IFC format and an IFC extension definition file generated by modeling software or other application systems, define a tree-like structure in a container according to the structure of an IFC file, and initialize an entity and an attribute object.

Referring to FIG. 7, a flow chart for importing a data model is shown. The method supports the import of IFC format files, non-IFC format three-dimensional geometric model files and IFC extended model definition files, develops conversion analysis components aiming at the three files, and traverses the imported IFC files by the components to construct tree structures of entity classes of each level. The integration relationship is embodied in the generative class. Each leaf node identifies a component object of the IFC. The class comprises multiple attributes of the entity and the reverse attribute of the supporting entity, the inheritance structure of the class represents the inheritance structures of all the entities in the IFC framework system, and the entity type is mapped into an interface of the class. The system analyzes the IFC file, reads the data of the IFC entity, loads the data to the memory and instantiates the entity object in the IFC service container.

Referring to fig. 8, for a data model export method flow, the invention provides a visualization interface and a 5D-IFC generation component, reads a query object of a persistence container, and obtains an instantiation object and a data structure of a 5D-BIM. The 5D-BIM model and data can be read and visually displayed through various three-dimensional plug-ins. Or converted into an IFC file. The 5D-BIM model and the data can be visually displayed through related application software and modeling software supporting IFC.

The operation and maintenance 5D-BIM data integration and sharing system based on IFC expansion provided by the embodiment of the invention adopts an IFC entity expansion and attribute expansion method and an IFC entity expansion and attribute expansion method based on a relational database and an object-relational mapping persistence method to realize the operation and maintenance monitoring application-oriented 5D-BIM data integration and sharing. The 5D-BIM data integration method comprises the following steps:

s10, reading the IFC file by using the IFC file analysis component 3, or converting the non-IFC format three-dimensional data model file by using the IFC conversion component 4, instantiating the IFC information model in the container, and establishing a data table by using the IFC object persistence component 2, or establishing association in the existing data table to update data.

And S20, reading and checking the IFC extension model definition file by using the extension IFC conversion component 5, and instantiating the extended entity object and the attributes. And reading monitoring sensing data in the monitoring system and time progress data in the project management system.

S30, establishing a 5D-BIM data model in the 5D-BIM entity integration containerization component 1 according to the incidence relation between the three-dimensional model entity object defined by the IFC extended model definition file and the monitoring sensing data and the incidence relation between the three-dimensional model entity object and the time progress data.

S40, establishing an association view of the monitoring sensing data, the time progress data and the 3D information model data table through the persistent object; and realizing the storage of the 5D-BIM model data in a relational database.

The 5D-BIM data sharing method comprises the following steps:

s100, selecting a BIM model needing to be shared, and inquiring whether the model has a corresponding IFC extension definition file instance or not by the 5D-BIM entity integration containerization component 1.

S200, if the definition file is not extended, obtaining the latest BIM model data through the IFC object persistence component 2, rebuilding the model in the 5D-BIM entity integration containerization component 1, and converting the model into the IFC file.

S300, if the extension definition file exists, obtaining the latest BIM model data and business data through the IFC object persistence component 2, reconstructing a 5D model in the 5D-BIM entity integration containerization component 1, and converting the 5D model into a 5F-IFC file.

Further, the access control component 8 includes:

a) all the IFC file analysis, instantiation, BIM model query and data integration operations are carried out, and if no authority exists, the related files or operations cannot be executed.

b) And reading the user permission information by performing IFC file generation and 5D-BIM visual object generation operations, wherein if no permission exists, the related files or operations cannot be executed.

The operation and maintenance 5D-BIM data integration and sharing system based on IFC extension provided by the embodiment of the invention comprises the following implementation processes:

1. according to the operation and maintenance 5D-BIM data integration sharing system based on IFC expansion, an application developer of the operation and maintenance system can expand entities and attributes required by operation and maintenance according to operation and maintenance requirements by referring to the IFC expansion flow, and write an IFC attribute expansion definition Express file.

2. After the extension IFC conversion component 5 reads in the file, the file is automatically analyzed and checked, if an error exists in the extension definition, error information is returned to remind an application developer of modifying the file. If the result is correct, defining a tree-shaped class structure according to the structure of the IFC file in the 5D-BIM entity integration containerization component 1, and initializing the entity and the attribute object.

3. The IFC analysis component 3 reads in an IFC format BIM model file generated by modeling software or other application systems, defines a tree-shaped structure in the 5D-BIM entity integration containerization component 1 according to the structure of the IFC file, and initializes the entity and the attribute object.

4. The IFC conversion component 4 reads in a non-IFC format three-dimensional geometric model file, converts the non-IFC format three-dimensional geometric model file into an IFC format model according to a defined data mapping relation, and initializes an entity and an attribute object in the 5D-BIM entity integration containerization component 1.

5. The 5D-BIM entity integration containerization component 1 initiates a data extraction request to the 5D-BIMIFC object persistence component 2 according to the data integration needs of the entity and the attribute object.

6. The 5D-BIM IFC object persistence component 2 instantiates a related object, connects a database, automatically writes an SQ L statement, performs addition, deletion, modification and check operations on the database, and synchronizes a data source object and data in a data table.

7. And the related object of the 5D-BIM IFC object persistence component 2 obtains data source object data and updates the data source object data into the corresponding entity and attribute object.

8. And (3) establishing the association integration of the BIM three-dimensional model object and the data in the 5D-BIM entity integration containerization component 1.

9. The 5D-BIM visual object interface 6 reads the query object of the 5D-BIM entity integration containerization component 1 through Web Services to obtain an instantiation object and a data structure of the 5D-BIM. The 5D-BIM model and data can be read and visually displayed through various three-dimensional plug-ins.

10. The 5D-BIM IFC generation component 7 can read the query object of the 5D-BIM entity integration containerization component 1 through Web Services to obtain an instantiation object and a data structure of the 5D-BIM and convert the instantiation object and the data structure into an IFC file. The 5D-BIM model and the data can be visually displayed through related application software and modeling software supporting IFC.

According to the operation and maintenance 5D-BIM data integration and sharing system based on IFC extension, the specific implementation of BIM dimension extension is separated from the application logic of operation and maintenance according to the software multiplexing development idea, and a BIM dimension extension system based on an IFC extension mechanism is developed to realize the correlation integration of BIM and operation and maintenance service data.

The operation and maintenance 5D-BIM integrated extension realized by the invention is a dynamic extension, namely an extension realized by reading in an IFC extension definition file, so that the extension can be changed at any time by changing the IFC extension definition file, and great flexibility is provided for the invention. Can be flexibly defined according to different requirements of operation and maintenance of the building project.

According to the invention, the nD-BIM integration model is established through IFC extension definition, so that BIM dimension extension and the complexity of BIM and application data integration are obviously simplified.

The embodiment of the invention provides a BIM information model time dimension and sensing dimension expanding tool for operation and maintenance requirements, and can solve the problem of integration of a three-dimensional BIM information model and operation and maintenance related service data. The invention realizes the analysis and the check of the IFC extension file, the instantiation of the original IFC entity and the newly added entity, the correlation integration of the three-dimensional information model and the service data, the generation of the 5D-BIM visual model, the generation of the 5D-IFC file and other series of problems in one tool, and can greatly simplify the development complexity of an application system.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. The IFC expansion-based operation and maintenance 5D-BIM data integration and sharing system is characterized by comprising:

the system comprises a 5D-BIM entity integration containerization component (1), an IFC object persistence component (2), an IFC analysis component (3), an IFC conversion component (4), an extension IFC conversion component (5), a 5D-BIM visual object interface (6), a 5D-BIM IFC generation component (7), an access control component (8), a business database (9) and a BIM database (10);

wherein:

the 5D-BIM entity integration containerization component (1) is used for acquiring various basic data from the IFC object persistence component (2), the IFC analysis component (3) and the extension IFC conversion component (5), instantiating the entity object in the container according to an IFC standard, completing data integration of a 3D model, a time dimension and a sensing dimension, and expressing and running the 5D-BIM object;

the IFC object persistence component (2) is used for realizing 5D-BIM object persistence, establishing a mapping relation with a corresponding table of a relational database, and providing a bottom information model and data support for each application system through self management and database operation of the persistence component; -accessing, by means of said access control component (8), a traffic database (9) and a BIM database (10);

the IFC analysis component (3) interacts with the 5D-BIM entity integration containerization component (1), reads and analyzes an IFC file generated by BIM information models of BIM modeling software or application systems, generates service information according to IFC standards, sends the service information to the 5D-BIM entity integration containerization component (1), and instantiates entity objects defined by the IFC file;

the IFC conversion component (4) has an interface with the 5D-BIM entity integration containerization component (1), converts a common non-IFC format geometric model into an IFC format model through a defined data mapping relation, analyzes the IFC format model, generates service information according to an IFC standard, sends the service information to the 5D-BIM entity integration containerization component (1), and instantiates an entity object defined by an IFC file;

the extension IFC conversion component (5) has an interface with the monitoring sensing application system and the 5D-BIM entity integrated containerization component (1) and is used for definition analysis and instantiation of an IFC extension file; completing the docking of the relational database and data query through an IFC object persistence component (2);

the 5D-BIM visual object interface (6) has an interface with the 5D-BIM entity integration containerization component (1), establishes a tree structure instantiation object of the 5D-BIM integration model according to an IFC standard, packages the tree structure instantiation object into Web Services and provides a public interface;

the 5D-BIM IFC generation component (7) has an interface with the 5D-BIM entity integration containerization component (1), and exports the 5D-BIM object in the container into a 5D IFC file in a format defined by IFC, so that other BIM application software can share the 5D information model conveniently;

the access control component (8) is used for establishing the relationship between the entity data model and the user role authority, controlling the access of the application system user to the 5D-BIM and interacting with the IFC object persistence component (2);

the business database (9) stores business data which are related to the application system related to operation and maintenance and BIM model data, and provides data access service through the access control component (8);

the BIM database (10) is a relational database for storing BIM model data (IFC) files submitted in different stages and different applications, and provides data adding, deleting, modifying and querying operations of various data for the persistence component; data access services are provided by an access control component (8).

2. The IFC extension-based operation and maintenance 5D-BIM data integration and sharing system as claimed in claim 1, wherein the process of the extension IFC conversion component (5) for IFC extension file definition parsing and instantiation comprises:

s51, analyzing the IFC extension file by using the IFC analyzing component (3) to obtain newly added entity and attribute object information;

s52, verifying the correctness of the IFC extension format;

s53, instantiating the entity and the attribute object in the 5D-BIM entity integration containerization component (1) if verification is passed; if the verification is not passed, returning extension verification error information and guiding to modify the extension model definition file.

3. The IFC extension-based operation and maintenance 5D-BIM data integration and sharing system according to claim 2, wherein the S52 verifying the correctness of the format of the IFC extension includes:

checking whether the IFC file geometric model is correct;

checking whether an extended IFC entity exists;

checking whether the extended entity attribute exists;

and checking whether the attribute value meets the requirement.

4. The IFC extension-based operation and maintenance 5D-BIM data integration and sharing system according to claim 1, wherein the IFC object persistence component (2) is configured to implement 5D-BIM object persistence as follows:

s22, creating a data source proxy object;

5. The IFC extension-based operation and maintenance 5D-BIM data integration and sharing system according to claim 1, wherein the IFC object persistence component (2) comprises:

6. The IFC extension-based operation and maintenance 5D-BIM data integration and sharing system as claimed in claim 1, wherein the 5D-BIM entity integration containerization component (1) comprises:

7. The IFC extension-based operation and maintenance 5D-BIM data integration and sharing system as claimed in claim 1, wherein the sharing system adopts IFC entity extension and attribute extension method, and realizes operation and maintenance monitoring application-oriented 5D-BIM data integration and sharing based on relational database and object-relational mapping persistence method; the 5D-BIM data integration method comprises the following steps:

s10, reading the IFC file by using an IFC analysis component (3), or converting the three-dimensional data model file in the non-IFC format by using an IFC conversion component (4); instantiating an IFC information model in a container, establishing a data table through an IFC object persistence component (2), or establishing association in the existing data table, and updating data;

s20, reading and checking an IFC extension model definition file by using an extension IFC conversion component (5), and instantiating an extended entity object and attribute; reading monitoring sensing data in a monitoring system and time progress data in a project management system;

s30, establishing a 5D-BIM data model in the 5D-BIM entity integrated containerization component (1) according to the incidence relation between the three-dimensional model entity object defined by the IFC extended model definition file and the monitoring sensing data and the incidence relation between the three-dimensional model entity object and the time progress data;

8. The IFC extension-based operation and maintenance 5D-BIM data integration and sharing system as claimed in claim 7, wherein the 5D-BIM data sharing method comprises the following steps:

s100, selecting a BIM model to be shared, and inquiring whether the model has a corresponding IFC extension definition file instance by a 5D-BIM entity integration containerization component (1);

s200, if the definition file is not extended, obtaining the latest BIM model data through the IFC object persistence component (2), rebuilding the model in the 5D-BIM entity integration containerization component (1), and converting the model into the IFC file;

s300, if the extension definition file exists, obtaining the latest BIM model data and business data through the IFC object persistence component (2), reconstructing a 5D model in the 5D-BIM entity integration containerization component (1), and converting the 5D model into a 5F-IFC file.

9. The IFC extension-based operation and maintenance 5D-BIM data integration sharing system according to claim 1, wherein the access control component (8) comprises: