An Internet-based electromechanical engineering construction information operation and maintenance management method and system

Abstract

This invention discloses an internet-based method and system for the operation and maintenance management of electromechanical engineering construction information, specifically relating to the field of data management technology. It involves constructing an initial BIM model based on design drawings and generating 3D model data containing equipment geometric information and spatial coordinates; acquiring the geometric shape and actual coordinates of on-site objects using 3D laser scanning equipment or high-precision positioning sensors; comparing the collected point cloud data with the initial BIM model using a spatial data matching algorithm to identify deviations and automatically update the BIM model, achieving dynamic correction of model accuracy; binding the updated equipment information to QR codes and simultaneously binding the actual location coordinates via indoor positioning tags; and uploading the corrected model and equipment information to a cloud-based operation and maintenance platform to achieve centralized information management and multi-terminal sharing. This method improves the efficiency and accuracy of electromechanical engineering operation and maintenance, and has significant application value.

Description

Technical Field

[0001] This invention relates to the field of data management technology, specifically to an internet-based method and system for the operation and maintenance management of electromechanical engineering construction information. Background Technology

[0002] Internet-based electromechanical engineering construction information operation and maintenance management refers to the unified collection, transmission, analysis, and management of various information (such as design drawings, construction progress, equipment status, personnel scheduling, etc.) during the electromechanical engineering construction process using internet technology, realizing informatization, visualization, and intelligent operation and maintenance throughout the entire construction process. This system not only improves project management efficiency but also enables real-time monitoring of project dynamics, optimizes resource allocation, ensures construction quality and safety, and provides technical support for the efficient operation of electromechanical engineering projects.

[0003] The existing technology has the following shortcomings:

[0004] In BIM-based construction and operation and maintenance management, the discrepancy between the geometric information of the model and the actual physical dimensions is a serious but easily overlooked problem. Due to limited initial modeling accuracy, coupled with the accumulation of errors during construction, the position of equipment in the BIM model gradually deviates from its actual position. This discrepancy is particularly pronounced in dense or underground spaces, potentially causing misoperations or reduced efficiency for operation and maintenance personnel during navigation, positioning, and disassembly / reassembly, and in severe cases, affecting equipment safety and the accuracy of operational decisions. Summary of the Invention

[0005] The purpose of this invention is to provide an Internet-based method and system for the operation and maintenance management of electromechanical engineering construction information, in order to address the shortcomings in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a method for operation and maintenance management of electromechanical engineering construction information based on the Internet, comprising:

[0007] In the early stages of electromechanical engineering construction, an initial BIM model is built based on the design drawings, and three-dimensional model data containing equipment geometric information and location information is generated.

[0008] After the equipment is actually installed, use 3D laser scanning equipment or high-precision positioning sensors to collect data on the construction site and obtain the equipment’s true geometric parameters and spatial coordinates.

[0009] The collected on-site point cloud data is compared with the initial BIM model. The deviation between the model and the actual object is identified through a spatial data matching algorithm. The geometric and positional information in the BIM model is automatically updated to achieve dynamic correction of the model accuracy.

[0010] The updated device information is bound to the device entity via a QR code, and the actual location coordinates of the device are simultaneously bound via an indoor positioning tag.

[0011] The revised BIM model and equipment location information are uploaded to the cloud-based operation and maintenance management platform via the Internet;

[0012] Maintenance personnel can access the real-time updated BIM model in the cloud platform through mobile terminals or wearable devices to obtain equipment positioning and navigation information.

[0013] Preferably, constructing the initial BIM model includes: converting the construction drawings into an editable format that supports BIM modeling, and standardizing them according to the building information model to complete the parameter definition and spatial positioning modeling of the component family.

[0014] Preferably, obtaining the actual geometric parameters and spatial coordinates of the device includes:

[0015] A three-dimensional laser scanning device is used to scan the construction site from multiple perspectives to collect high-density point cloud data. The three-dimensional spatial position of the equipment is obtained by combining RTK-GNSS or UWB tags, and the point cloud accuracy is controlled within an error of less than 5mm.

[0016] Preferably, the collected site point cloud data is compared with the initial BIM model, and the deviation between the model and the actual object is identified through a spatial data matching algorithm. Specifically, let the point cloud data be... , where each point This represents the coordinates of a spatial point of an actual object on site; let the set of target component points in the BIM model be... , where each point Represents the ideal spatial coordinates of the devices in the model;

[0017] The objective function is to minimize the mean square error between the source point cloud P and the target point cloud Q after transformation. in, Let be the i-th actual point from the point cloud scan, representing the physical location of the device. Let be the i-th point from the BIM model, representing the preset position in the design model; z is the three-dimensional rotation matrix, representing the orientation correction of the model in space; t is the three-dimensional translation vector, representing the overall offset of the model position; and n is the number of matching points.

[0018] Preferably, the algorithm steps include: initializing z=1, t=0;

[0019] For each point Find the nearest point in Q. , forming a matching pair;

[0020] Calculate the optimal z and t values ​​for all current point pairs to minimize the error;

[0021] Iteratively update the point cloud positions until convergence or the set number of iterations is reached.

[0022] Preferably, for each set of matching points The deviation vector is: Deviation modulus This reflects the positional differences between the BIM model and the physical object;

[0023] Applying the transformation results z and t to the initial BIM component positions, the updated component coordinates are obtained. for: The system writes the correction results into the BIM platform database to achieve real-time correction of the model's geometry and position.

[0024] Preferably, a deviation threshold ϵ is set when When this occurs, the component is marked as having a high deviation, and a deviation anomaly report is generated for the engineer to confirm and review.

[0025] Preferably, the absolute position of the device in the X, Y, Z three-dimensional coordinate system is obtained in real time through the UWB base station ranging algorithm, with an error of no more than 10 centimeters.

[0026] Preferably, the cloud-based operation and maintenance management platform integrates with the local BIM modeling platform through a RESTful API interface, supports the uploading and decryption of model data and equipment attribute data in blocks with encryption, and realizes the automatic association between BIM components and equipment databases.

[0027] The present invention also provides an Internet-based electromechanical engineering construction information operation and maintenance management system, including a component information initialization module, a field point cloud acquisition module, a matching algorithm module, a bit tag integration module, a cloud data management module, and an operation and maintenance interaction module;

[0028] Component information initialization module: In the early stage of electromechanical engineering construction, an initial BIM model is built based on the design drawings, and three-dimensional model data containing equipment geometric information and location information is generated;

[0029] On-site point cloud acquisition module: After the actual installation of the equipment is completed, the 3D laser scanning equipment or high-precision positioning sensor is used to collect data on the construction site to obtain the actual geometric parameters and spatial coordinates of the equipment;

[0030] Matching algorithm module: It compares the collected site point cloud data with the initial BIM model, identifies the deviation between the model and the actual object through spatial data matching algorithm, and automatically updates the geometric and positional information in the BIM model to achieve dynamic correction of model accuracy.

[0031] Location tag integration module: Binds the updated device information to the device entity with a QR code, and synchronously binds the actual location coordinates of the device through indoor positioning tags;

[0032] Cloud-based data management module: Uploads the revised BIM model and equipment location information to the cloud-based operation and maintenance management platform via the Internet;

[0033] Operation and maintenance interaction module: Operation and maintenance personnel can access the real-time updated BIM model in the cloud platform through mobile terminals or wearable devices to obtain equipment positioning and navigation information.

[0034] The technical effects and advantages provided by the present invention in the above technical solution are as follows:

[0035] 1. This invention establishes a dynamic BIM update mechanism covering the entire process from design and construction to operation and maintenance by integrating 3D laser scanning, spatial data registration algorithms (such as ICP), QR code identification, and UWB positioning technology. This method solves the problem that traditional BIM models cannot reflect the actual installation status of equipment in a timely manner during the construction phase. Especially in scenarios with complex spatial structures or multiple systems intersecting, the automatic comparison and dynamic correction between point clouds and the model effectively improves the geometric accuracy and spatial consistency of the BIM model. Simultaneously, the system can automatically identify installation deviations, generate anomaly reports, and trigger manual verification, significantly reducing the workload of manual surveying and on-site verification, and improving the intelligence level of construction information management.

[0036] 2. This invention achieves three-dimensional data binding of "equipment components - spatial location - information tags," and, in conjunction with cloud platform and mobile terminal access mechanisms, enables maintenance personnel to quickly locate target equipment and obtain its operating status, maintenance records, and operation instructions, greatly improving the efficiency of inspection, emergency repair, and maintenance response. It supports multi-terminal access (such as mobile phones, tablets, and AR glasses) and three-dimensional visual navigation path push, making it particularly suitable for electromechanical engineering projects in confined spaces, densely packed equipment, or underground areas. By synchronizing the corrected BIM model with the maintenance system in real time, this invention achieves closed-loop integration of construction and maintenance data, significantly improving the project's maintenance accuracy, safety, and overall digital management level. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0038] Figure 1 This is a mind map of the method of the present invention.

[0039] Figure 2This is a mind map of the system modules of the present invention. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] Example 1, please refer to Figure 1 As shown in this embodiment, a method for the operation and maintenance management of electromechanical engineering construction information based on the Internet includes:

[0042] In the early stages of electromechanical engineering construction, an initial BIM model is built based on the design drawings, and three-dimensional model data containing equipment geometric information and location information is generated.

[0043] After the equipment is actually installed, use 3D laser scanning equipment or high-precision positioning sensors to collect data on the construction site and obtain the equipment’s true geometric parameters and spatial coordinates.

[0044] The collected on-site point cloud data is compared with the initial BIM model. The deviation between the model and the actual object is identified through a spatial data matching algorithm. The geometric and positional information in the BIM model is automatically updated to achieve dynamic correction of the model accuracy.

[0045] The updated device information is bound to the device entity via a QR code, and the actual location coordinates of the device are simultaneously bound via an indoor positioning tag.

[0046] The revised BIM model and equipment location information are uploaded to the cloud-based operation and maintenance management platform via the Internet;

[0047] Maintenance personnel can access the real-time updated BIM model in the cloud platform through mobile terminals or wearable devices to obtain equipment positioning and navigation information.

[0048] Before the official commencement of the electromechanical engineering construction project, the initial BIM model is constructed based on the approved construction drawings and design documents. This includes:

[0049] Obtain the complete set of electromechanical engineering design drawings for the project, including floor plans, system diagrams, sectional views, and equipment lists for HVAC, electrical, water supply and drainage, fire protection, and low-voltage systems.

[0050] Standardize the drawing formats, such as converting PDF and DWG formats into editable formats required for BIM modeling (such as those supported by Revit), and encode and standardize the drawing content according to national or industry BIM modeling standards (such as GB / T 51269-2017).

[0051] Based on the types of electromechanical equipment (such as fans, pumps, distribution cabinets, lighting fixtures, etc.) listed in the design drawings, define corresponding component families in the BIM platform, and set parameters such as standard dimensions, materials, connection diameters, and electrical interfaces for each component. Parametric modeling is used to ensure that each equipment component can automatically adjust its shape according to the specific dimensions of the project, facilitating subsequent design changes and construction simulation.

[0052] Build the building structure model and MEP system model of the project in a BIM platform (such as Autodesk Revit, Bentley AECOsim, etc.), and accurately draw the equipment pipeline routes and equipment placement locations according to the design drawings. During the modeling process, fully consider the building space, the overall pipeline routing, and the feasibility of equipment installation to avoid clashes, such as intersections of hot and cold water pipes, power and data cables, and ventilation ducts. Use 3D clash detection tools (such as Navisworks) to resolve these issues in advance.

[0053] Each equipment component is assigned precise geometric dimensions (length, width, height, weight, connection port location, etc.) and spatial location information (X, Y, Z three-dimensional coordinates), and a global coordinate system is used for unified management to ensure that the equipment location in the model can be mapped to the on-site construction location.

[0054] If underground equipment or concealed works are involved, it is also necessary to record the burial depth or installation level of the equipment in the vertical space by setting an elevation value.

[0055] Embed attribute information for each component in the BIM model, including equipment number, specifications, manufacturer, interface parameters, electrical load, control method, maintenance cycle, etc., to ensure that the subsequent operation and maintenance system can directly retrieve relevant data through the model.

[0056] If the device is subsequently bound to a QR code, a unique identifier ID for the device needs to be preset at this stage to facilitate information tracking and system integration.

[0057] Once the initial model is completed, output IFC, RVT, or dedicated BIM format files and import them into the collaborative management platform for collaborative use by the construction party, supervision party, and operation and maintenance party.

[0058] Establish a model version management mechanism, mark the initial model version as V1.0, and set up subsequent model change and revision processes to support dynamic updates and accuracy corrections during the construction phase.

[0059] The initial BIM model constructed through the above steps not only reflects the geometric shape and layout logic of the electromechanical equipment in the project, but also forms a complete spatial positioning data and basic information database. This model provides a unified data support platform for construction organization, construction simulation, schedule planning, operation and maintenance planning, and other tasks, becoming an important foundation for the full life cycle management of electromechanical engineering.

[0060] After the installation of mechanical and electrical equipment is completed, in order to resolve the geometric deviation between the BIM model and the actual construction status, it is necessary to conduct high-precision measurement and data acquisition of the spatial location and dimensions of the installed equipment on site. This includes the following sub-steps:

[0061] Based on the site environment and measurement accuracy requirements, select appropriate spatial measurement equipment. Commonly used equipment includes:

[0062] 3D laser scanners (such as FARO, Leica BLK360, etc.) are used for full-area point cloud acquisition; high-precision positioning sensors (such as total stations, RTK-GNSS, UWB locators) are used to obtain the specific coordinates of the equipment; handheld scanning terminals or structured light devices are used for fine capture of the local geometric structure of the equipment. The equipment is calibrated and adjusted to ensure that the measurement results meet the accuracy requirements (generally, the error should be less than 5mm).

[0063] Laser scanning equipment is deployed at the construction site to perform static scanning by area and angle, generating high-density 3D point cloud data that includes the site's building structure, pipeline system, and equipment components. Each scanning station should have good vantage point coverage, and reference benchmarks should be set for subsequent point cloud stitching and coordinate unification.

[0064] Professional point cloud processing software (such as Cyclone, Recap, Scene, etc.) is used to register and stitch together point cloud data collected from multiple perspectives to generate an overall point cloud model in a unified coordinate system. If a BIM model reference coordinate system has been established at the construction site, the point cloud model is converted to the BIM model coordinate system by setting known reference points to ensure that the measurement data is compatible with the BIM system.

[0065] The process involves identifying, segmenting, and 3D fitting various equipment areas within the point cloud model to extract the equipment's external contour, geometric parameters (such as length, width, height, diameter, and interface location), and spatial orientation information. A point cloud and component model matching algorithm (such as the ICP algorithm) is then used to fit and compare the actual shape of the equipment with the BIM components, identifying the actual installation location of the equipment and any deviations from the model.

[0066] For each key piece of equipment, extract its center point coordinates and installation angle (X, Y, Z position + Roll / Pitch / Yaw orientation) in 3D space and store them in a structured data format (such as CSV, JSON, or database table). If high-precision UWB positioning or a laser total station is used, the positioning point information of key components can be directly collected and mapped into the model.

[0067] By comparing the initial BIM model data with the actual collected data, the equipment areas with deviations exceeding the limits are marked, and an anomaly report is automatically generated. The deviation value can be used as the basis for subsequent model correction and responsibility division, and submitted to relevant professional engineers for review and confirmation.

[0068] By introducing high-precision on-site spatial data acquisition methods, not only can the actual geometric dimensions and coordinate information of the equipment after installation be obtained, but a reliable basis can also be provided for subsequent BIM model correction and operation and maintenance data accuracy assurance. This step is particularly suitable for accuracy verification before delivery after construction is completed, and can also serve as the technical foundation for long-term operation and maintenance status monitoring.

[0069] To achieve precise alignment between the actual equipment locations after construction and the virtual components in the initial BIM model, this invention introduces the ICP iterative nearest-point algorithm. This algorithm registers the 3D point cloud data obtained from laser scanning with the geometric data of the BIM model, identifies spatial deviations, and automatically corrects the BIM model. The specific steps are as follows:

[0070] Let the point cloud data be , where each point This represents the coordinates of a spatial point of an actual object on site; let the set of target component points in the BIM model be... , where each point This represents the ideal spatial coordinates of the devices in the model, where n is the total number of data points.

[0071] The goal of the ICP algorithm is to find the optimal rigid body transformation (rotation matrix). Translation vector t This ensures that the source point cloud P is aligned with the target point cloud Q by the minimum mean square error after transformation.

[0072] The objective function is: ;in, Let be the i-th actual point from the point cloud scan, representing the physical location of the device. Let be the i-th point from the BIM model, representing its preset position in the design model; z is the 3D rotation matrix, representing the orientation correction of the model in space; t is the 3D translation vector, representing the overall offset of the model's position; and n is the number of matching points (selectable through a correspondence).

[0073] The algorithm steps include:

[0074] Initialize z = I, t = 0;

[0075] For each point Find the nearest point in Q. , forming a matching pair;

[0076] Calculate the optimal z and t values ​​for all current point pairs to minimize the error (solved through SVD singular value decomposition).

[0077] renew ;

[0078] Repeat the steps until the error converges or the set number of iterations is reached.

[0079] For each set of matching points The deviation vector is: Deviation modulus This reflects the locational differences between the BIM model and the actual object.

[0080] Applying the transformation results z and t to the initial BIM component positions, the updated component coordinates are obtained. for: The system writes the correction results into the BIM platform database to achieve real-time correction of the model's geometry and position.

[0081] Set the deviation threshold ϵ, when When a component is marked as having a high deviation, it is reminded to undergo manual verification. For large components or complex pipe networks, they can be processed in blocks according to the components to avoid the spread of overall matching errors.

[0082] By applying the ICP spatial matching algorithm, this invention can efficiently achieve accurate registration between point cloud data and BIM models. It can not only identify installation errors but also automatically perform dynamic model correction, thereby improving the positioning accuracy and reliability of the model in subsequent operation and maintenance phases. This method is particularly effective in solving the problem of equipment positioning deviation in high-density spaces.

[0083] After completing the BIM model geometric correction and equipment spatial coordinate update, in order to achieve entity identification, precise positioning, and information visualization management of equipment during the construction and operation and maintenance phases, this step binds the digital information of the equipment with the physical entity, specifically including the following sub-steps:

[0084] The system automatically generates a unique equipment number (UID) for each equipment component in the updated BIM model and integrates the following key information to form an information package:

[0085] Equipment type and model;

[0086] Installation location (3D coordinates);

[0087] Updated geometry;

[0088] Manufacturer, serial number, installation time;

[0089] Maintenance cycle and responsible person information;

[0090] Component ID and database index number in the BIM system.

[0091] The device information packet is encrypted and encoded using a QR code encoding engine (such as one based on the QR Code standard) to generate a QR code image, which supports fast decoding by mobile terminals.

[0092] Print or laser engrave the QR code onto a corrosion-resistant and weather-resistant physical label (such as metal, self-adhesive, or resin material), and fix it in a visible and easily scannable position on the equipment, depending on the equipment installation environment, by pasting or hanging.

[0093] Labels can include brief equipment information and warning signs to enhance on-site identification and safety.

[0094] To achieve real-time device positioning in complex spatial environments, the following indoor positioning technologies can be used for auxiliary binding:

[0095] UWB (Ultra-Wideband) tags: Install UWB electronic tags on key equipment to obtain centimeter-level spatial coordinates by interacting with on-site positioning base stations;

[0096] RFID / NFC tags: suitable for low-cost positioning and short-range identification;

[0097] Bluetooth beacon (iBeacon): Used for zone positioning and area identification in large spaces.

[0098] The system establishes a database binding relationship between the unique ID of the aforementioned positioning tag and the device UID, and synchronously transmits real-time or static coordinate information back to the BIM operation and maintenance platform, forming a three-dimensional binding structure of "device number - QR code - positioning coordinates".

[0099] After the QR code and location tag are generated, their information will be automatically uploaded to the cloud-based equipment information management platform and embedded into the corresponding component nodes in the BIM model;

[0100] The platform supports mobile devices, tablets, AR glasses and other terminals to scan and recognize QR codes or location signals, and to access device digital information and 3D location in real time.

[0101] Maintenance personnel can quickly access information such as installation drawings, maintenance records, and repair history of the equipment by scanning the equipment's QR code with their mobile phones or tablets;

[0102] When used in conjunction with an indoor positioning system, the current location of the equipment can be highlighted in the BIM model to guide maintenance routes; if the equipment is in an abnormal state, the system can push a fault alarm based on the coordinates of the positioning tag to assist in emergency response and location.

[0103] By implementing this step, a closed-loop data system is achieved across the entire chain from "digital model → physical equipment → spatial location". This not only enhances the on-site visualization and operability of equipment information, but also provides intelligent support for subsequent maintenance, repair, and inspection activities, significantly improving management efficiency and accuracy.

[0104] To achieve centralized management and multi-terminal access to equipment information in electromechanical engineering projects, this step transmits the geometrically corrected and location-bound BIM model data and equipment spatial location information to a cloud-based operation and maintenance management platform via the internet. This process ensures the traceability of equipment data, inter-system interoperability, and data real-time performance, specifically including:

[0105] Export the revised BIM model as a universal format file that supports multi-platform integration, such as:

[0106] The system uses the following formats: IFC (Industry Foundation Classes) standard format; RVT (Revit native model format); gbXML or COBie (Construction-Operations Building Information Exchange) format; integrates equipment geometric attributes, 3D spatial coordinates, QR code identification, location tag ID and their real-time location into a structured data table, stored in XML, JSON or SQL format; establishes an index relationship between the model and the database to ensure that each equipment node in the model corresponds one-to-one with the entity record in the database.

[0107] The system connects with the cloud-based operation and maintenance management platform using standard network interface protocols such as RESTful API or GraphQL. The interface supports functions such as data upload, synchronization, update and verification to ensure that information is pushed in real time after model changes. For large-capacity BIM model data, chunked upload technology and compression transmission mechanisms (such as gzip and Brotli) can be used to improve upload efficiency.

[0108] During the upload process, BIM model data and sensitive equipment information are encrypted (e.g., AES-256) to ensure secure transmission; the cloud platform sets access control (RBAC or OAuth2) to restrict upload operations to users or services with administrative privileges; all upload operation records are written to the log system for future auditing and traceability.

[0109] After receiving and parsing the uploaded data, the cloud platform automatically deploys the BIM model to the server-side BIM engine (such as Forge Viewer, BIMServer, etc.); simultaneously, it writes the equipment coordinates, QR code identification, and location ID into the operation and maintenance database, and integrates it with the space management, fault handling, and maintenance work order systems in the platform; the system automatically links the data according to the component index number in the model, that is, when users view the equipment on the platform, they can retrieve its location information, historical data, and operation and maintenance records in real time.

[0110] The uploaded data can be accessed and called in real time by a variety of terminal devices, including: web-based BIM operation and maintenance platform; mobile terminal App (suitable for inspection and emergency repair); AR / VR visualization terminal (augmented reality operation and maintenance); third-party building management system (BAS / BMS); and supports API interconnection between platforms, making the BIM model a core data source shared by multiple systems and helping to realize a "digital twin" building environment.

[0111] By uploading the revised BIM model and equipment spatial location information to the cloud-based operation and maintenance management platform, this invention achieves closed-loop feedback and unified scheduling of on-site data to the information system, providing strong data support for subsequent modules such as remote monitoring, intelligent early warning, maintenance dispatch, and operation analysis, and effectively improving the level of intelligent and refined management of engineering projects.

[0112] To improve the response speed and operational accuracy during the operation and maintenance phase of electromechanical engineering, this step provides a data access mechanism based on a cloud-based BIM model. This allows maintenance personnel to obtain real-time equipment location information via mobile terminals or wearable devices, enabling navigation, positioning, and precise operational support. This step includes the following sub-steps:

[0113] Maintenance personnel are equipped with mobile terminals (such as smartphones and tablets) or wearable devices (such as AR glasses and smart helmets), all of which support wireless networks (Wi-Fi / 5G) and Bluetooth communication;

[0114] The equipment comes pre-installed with a BIM operation and maintenance platform client or web application, and users can securely access the platform through an identity authentication system (account and password, QR code login or facial recognition).

[0115] After logging in, the system automatically loads the latest BIM model data for the current project (which can be loaded hierarchically by floor, area, or system type to reduce the amount of data).

[0116] Maintenance personnel can initiate equipment location requests in the following ways: manually enter the equipment number or name; scan the equipment entity QR code; or click the "Go to Equipment" navigation button after receiving a fault push notification. After receiving the request, the system will quickly locate the corresponding component node through the model index library and retrieve its spatial coordinates.

[0117] The platform highlights the target equipment in the BIM model and calculates the optimal path based on the current spatial location of the maintenance personnel (provided by the terminal positioning module or indoor UWB / Bluetooth positioning system);

[0118] The system generates a 3D visual navigation path, marks the spaces it passes through (such as stairs, elevators, passages, and pipe shafts), and presents it in a map-style or immersive (such as AR) interface.

[0119] If AR devices are used, path guidance can be overlaid on the real scene, allowing users to operate according to the map without having to look at the map, significantly improving spatial awareness and work efficiency.

[0120] In addition to navigation information, the platform also displays the following content for this device:

[0121] Real-time operating status (such as temperature, current, pressure, etc.); maintenance records, fault history, and repair suggestions; 3D disassembly and assembly diagrams or operating procedure videos; maintenance personnel can access information while navigating, supporting paperless operations and remote collaboration.

[0122] After completing maintenance or inspection tasks, maintenance personnel can upload maintenance results via mobile terminals, including: photos of completed work; text records or voice notes; equipment status changes and anomaly markings; all operation information will be automatically transmitted back to the cloud platform, bound to the equipment nodes, and the maintenance logs will be updated to form a traceable "timeline-style maintenance archive".

[0123] By constructing a BIM model calling mechanism based on mobile terminals or wearable devices, and combining indoor positioning and 3D navigation technologies, this invention significantly improves the positioning accuracy, response speed, and operational transparency in the equipment operation and maintenance process. It is especially suitable for electromechanical engineering environments with complex spatial structures and dense equipment, and is one of the key supporting technologies for intelligent and digital facility operation and maintenance.

[0124] Example 2, please refer to Figure 2 As shown in the figure, the Internet-based electromechanical engineering construction information operation and maintenance management system described in this embodiment includes a component information initialization module, a field point cloud acquisition module, a matching algorithm module, a bit tag integration module, a cloud data management module, and an operation and maintenance interaction module;

[0125] Component information initialization module: In the early stage of electromechanical engineering construction, an initial BIM model is built based on the design drawings, and three-dimensional model data containing equipment geometric information and location information is generated;

[0126] On-site point cloud acquisition module: After the actual installation of the equipment is completed, the 3D laser scanning equipment or high-precision positioning sensor is used to collect data on the construction site to obtain the actual geometric parameters and spatial coordinates of the equipment;

[0127] Matching algorithm module: It compares the collected site point cloud data with the initial BIM model, identifies the deviation between the model and the actual object through spatial data matching algorithm, and automatically updates the geometric and positional information in the BIM model to achieve dynamic correction of model accuracy.

[0128] Location tag integration module: Binds the updated device information to the device entity with a QR code, and synchronously binds the actual location coordinates of the device through indoor positioning tags;

[0129] Cloud-based data management module: Uploads the revised BIM model and equipment location information to the cloud-based operation and maintenance management platform via the Internet;

[0130] Operation and maintenance interaction module: Operation and maintenance personnel can access the real-time updated BIM model in the cloud platform through mobile terminals or wearable devices to obtain equipment positioning and navigation information.

[0131] The above formulas are all dimensionless calculations. The formulas are derived from software simulations based on a large amount of collected data to obtain the most recent real-world results. The preset parameters in the formulas are set by those skilled in the art according to the actual situation.

[0132] It should be understood that the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. A and B can be singular or plural. Additionally, the character " / " in this article generally indicates an "or" relationship between the preceding and following related objects, but it can also represent an "and / or" relationship. Please refer to the context for a more accurate understanding.

[0133] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0134] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application.

Claims

1. A method for operation and maintenance management of electromechanical engineering construction information based on the Internet, characterized in that: include: In the early stages of electromechanical engineering construction, an initial BIM model is built based on the design drawings, and three-dimensional model data containing equipment geometric information and location information is generated. After the equipment is actually installed, use 3D laser scanning equipment or high-precision positioning sensors to collect data on the construction site and obtain the equipment’s true geometric parameters and spatial coordinates. The collected on-site point cloud data is compared with the initial BIM model. The deviation between the model and the actual object is identified through a spatial data matching algorithm. The geometric and positional information in the BIM model is automatically updated to achieve dynamic correction of the model accuracy. Specifically, this includes comparing the collected site point cloud data with the initial BIM model, and using spatial data matching algorithms to identify discrepancies between the model and the actual object. Specifically, let the point cloud data be... , where each point This represents the coordinates of a spatial point of an actual object on site; let the set of target component points in the BIM model be... , where each point Represents the ideal spatial coordinates of the devices in the model; The objective function is to minimize the mean square error between the source point cloud P and the target point cloud Q after transformation. ;in, Let be the i-th actual point from the point cloud scan, representing the physical location of the device. Let be the i-th point from the BIM model, representing the preset position in the design model; z is the three-dimensional rotation matrix, representing the orientation correction of the model in space; t is the three-dimensional translation vector, representing the overall offset of the model position; and n is the number of matching points. The algorithm steps include: initialization , t=0; For each point Find the nearest point in Q. They form a matching pair; Calculate the optimal z and t values ​​for all current point pairs to minimize the error; Iteratively update the point cloud positions until convergence or the set number of iterations is reached; The updated device information is bound to the device entity via a QR code, and the actual location coordinates of the device are simultaneously bound via an indoor positioning tag. For each set of matching points The deviation vector is: Deviation modulus This reflects the positional differences between the BIM model and the physical object; Applying the transformation results z and t to the initial BIM component positions, the updated component coordinates are obtained. for: The system writes the correction results into the BIM platform database to achieve real-time correction of the model's geometry and position. Set the deviation threshold ϵ, when When the deviation exceeds ϵ, it is marked as a high-deviation component, and a deviation anomaly report is generated for engineer confirmation and review; The revised BIM model and equipment location information are uploaded to the cloud-based operation and maintenance management platform via the Internet; Maintenance personnel can access the real-time updated BIM model in the cloud platform through mobile terminals or wearable devices to obtain equipment positioning and navigation information.

2. The method for operation and maintenance management of electromechanical engineering construction information based on the Internet according to claim 1, characterized in that: Building the initial BIM model includes: converting construction drawings into an editable format that supports BIM modeling, standardizing them according to the building information model, and completing the parameter definition and spatial positioning modeling of component families.

3. The method for operation and maintenance management of electromechanical engineering construction information based on the Internet according to claim 1, characterized in that: Obtaining the device's true geometric parameters and spatial coordinates includes: A three-dimensional laser scanning device is used to scan the construction site from multiple perspectives to collect high-density point cloud data. The three-dimensional spatial position of the equipment is obtained by combining RTK-GNSS or UWB tags, and the point cloud accuracy is controlled within an error of less than 5mm.

4. The method for operation and maintenance management of electromechanical engineering construction information based on the Internet according to claim 1, characterized in that: The absolute position of the device in the X, Y, Z three-dimensional coordinate system is obtained in real time through the UWB base station ranging algorithm, with an error of no more than 10 centimeters.

5. The method for operation and maintenance management of electromechanical engineering construction information based on the Internet according to claim 1, characterized in that: The cloud-based operation and maintenance management platform integrates with the local BIM modeling platform through a RESTful API interface, supporting the uploading and decryption of model data and equipment attribute data in blocks with encryption, and realizing the automatic association between BIM components and equipment databases.

6. An Internet-based electromechanical engineering construction information operation and maintenance management system, used to implement the Internet-based electromechanical engineering construction information operation and maintenance management method according to any one of claims 1-5, characterized in that: It includes a component information initialization module, a field point cloud acquisition module, a matching algorithm module, a bit tag integration module, a cloud data management module, and an operation and maintenance interaction module; Component information initialization module: In the early stage of electromechanical engineering construction, an initial BIM model is built based on the design drawings, and three-dimensional model data containing equipment geometric information and location information is generated; On-site point cloud acquisition module: After the actual installation of the equipment is completed, the 3D laser scanning equipment or high-precision positioning sensor is used to collect data on the construction site to obtain the actual geometric parameters and spatial coordinates of the equipment; Matching algorithm module: It compares the collected site point cloud data with the initial BIM model, identifies the deviation between the model and the actual object through spatial data matching algorithm, and automatically updates the geometric and positional information in the BIM model to achieve dynamic correction of model accuracy. Location tag integration module: Binds the updated device information to the device entity with a QR code, and synchronously binds the actual location coordinates of the device through indoor positioning tags; Cloud-based data management module: Uploads the revised BIM model and equipment location information to the cloud-based operation and maintenance management platform via the Internet; Operation and maintenance interaction module: Operation and maintenance personnel can access the real-time updated BIM model in the cloud platform through mobile terminals or wearable devices to obtain equipment positioning and navigation information.

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