Smart operation and maintenance: a visual management system based on BIM technology

foreword

In recent years, with the continuous development and application of a new generation of information technology and the acceleration of the country's "new infrastructure" layout, my country's subway station informatization construction has entered a stage of rapid development. At the same time, the spatial environment of subway stations has also become complex and diverse. Reflected in the design of the subway space environment, the design of various related systems is becoming more and more difficult, and the traditional design methods are no longer sufficient to meet the current design needs.

As a cutting-edge technology in the construction industry, BIM technology can provide new ideas and methods for subway station space environment design, urban construction, data center, park construction and other projects based on its visualization and informatization characteristics. Tupu software supports overlaying BIM building data into 3D scenes, and also supports overlaying BIM models into map scenes to realize the combined display of BIM + GIS.

Introduction to BIM

BIM (Building Information Modeling) technology is a data-based tool applied to engineering design, construction and management. BIM lightweight technology refers to the technology that allows BIM to be used on various web browsers and mobile apps through technical means such as compressing the BIM model after the BIM model of the engineering building is established.

BIM application in data center:

Tupu software applies BIM technology to data center construction, covering: planning, design, construction and operation and maintenance management and other stages. Combined with BIM technology, the building structure of the data center and the equipment in the infrastructure system are simulated and presented in 3D, which is intuitive and realistic. Various systems in the data center can be designed using BIM, including air conditioning systems and ventilation systems.

In the daily operation and maintenance process, through the location and coding of the equipment in the established BIM model, the equipment in the operation and maintenance system can be quickly located; the operation status and business processing of the data center equipment can be obtained in real time, and the BIM automatic alarm can be realized. Intelligent operation and maintenance provide guarantee.

BIM model characteristics and current issues for 3D visualization:

• The model has a high degree of refinement and a large amount of data
• Many elements are not needed in 3D display (eg furniture in the building, construction rebar, etc.)
• The large amount of model data leads to slow loading or even failure to load
• The texture is not beautiful, and the visualization effect is not ideal

Using a BIM model for 3D visualization requires the following:

• Lightweight processing
• Appearance optimization

BIM + GIS application integration:

The BIM model organizes data according to IFC (Industry Foundation Classes) standards, or converts it into a format supported by mature 3D engines such as OBJ, DirectX, OSG, etc., and reads it directly by the GIS system to realize the integration of BIM and GIS data.

Usually, the construction management platform combines GIS+BIM technology to conduct simulation analysis of geographic location information and hydrogeological data information content, and provides functions such as spatial analysis, positioning, and information release.

The lightweight method of Tupu software HT is a brand-new change in traditional GIS and BIM technology: HT has the advantages of light weight and low cost, and enterprises no longer need to purchase heavy and expensive GIS and BIM software; and the starting point is low , the effect is good, traditional Web developers can easily get started, and with the help of HT's powerful 3D rendering effects, high-simulation construction scenes can be created.

Tupu BIM Lightweight Solution

Tupu provides a complete set of BIM visualization solutions. The main process is as follows:

BIM file uploading and parsing and BIM model lightweighting are realized through the Tupu BIM building information model development platform. The visual scene construction and visual display are realized through the Tupu visualization engine. The visualization engine provides a front-end BIM visualization plug-in, which is responsible for parsing BIM information.

Users can focus on the development of the business layer without caring about BIM-related loading processing. Data exchange between platforms in the development process can be done by dragging and dropping or one-click import, and no complicated configuration is required.

The lightweight method of Tupu software HT is a brand-new change in traditional GIS and BIM technology: HT has the advantages of light weight and low cost, and enterprises no longer need to purchase heavy and expensive GIS and BIM software; and the starting point is low , the effect is good, traditional Web developers can easily get started, and with the help of HT's powerful 3D rendering effects, high-simulation construction scenes can be created.

BIM building information model development platform

The HT BIM development platform provides a method for lightweight processing of BIM models. Through the platform users can create snapshots of the BIM model (a lightweight subset of the model).

The HT BIM platform provides the following features:

BIM file (IFC2X3, IFC4) uploading and decoding functions. The server-side BIM decoder decodes the IFC file into a proprietary format that HT can display and render. To export BIM building information, the building information of the model can be accessed with the HT SDK.

The client can browse the decoded BIM model and BIM attribute information

The client supports selecting and loading models on demand, and supports batch loading of large models

Client-side processing of models includes:

Generate snapshots (HT private format) based on model height or asset type information. Snapshots can be directly parsed by the HT SDK and used directly for project development

Generate OBJ files based on model height or asset type information. OBJ can be opened and edited with general 3D software.

The user can manually control the model to load, show or hide in batches. It is convenient for users to analyze and generate optimal snapshots.

Functional flow chart

Through the BIM platform client, users can upload IFC files. After the IFC file is processed by the platform server, the BIM model is displayed on the client side according to the BIM attribute structure. Users can select the BIM components that need to be preserved through the client-side editing function, and generate a BIM model snapshot or OBJ file from the selected BIM components. The generated snapshot and OBJ files can be directly loaded by the HT SDK.

Show results

In this subway station and park construction visualization project, the wireframe technology is used to construct and restore the 3D model of the subway station with high precision. After the BIM technology refines and deepens the model, it cooperates with the Tupu software HT engine to perform 3D rendering animations that are close to reality, giving people a sense of reality and direct visual impact. It supports viewing methods such as 360-degree rotation and magnification of details, which is beneficial to the overall control of stations and construction management. Combined with technologies such as VR, virtual reality demonstrations can be realized, increasing the real experience of business personnel.

Click the menu button on the left to drill down to the corresponding subway system layer by layer. It is convenient for staff to complete the query and processing of various data content during specific operations, and no longer need to worry about different interaction modes across platforms. The system supports the free setting of alarm types according to violations in the 3D scene, such as crowded crowds, exceeding the safety line, and stagnant water not being drained.

System analysis

System overview

Tupu software digitally twins the infrastructure and appearance of the subway, and then presents data information such as equipment information, energy consumption, and surveillance video through a 2D panel. With BIM subway space information and equipment information as the core, and surveillance video as the link, it integrates existing video surveillance, air conditioning, pipe network, security, computer room, power distribution and other systems to realize continuous real-time perception of comprehensive information on equipment and energy consumption. The HT system of Tupu software supports roaming from the perspective of pedestrians, presents the overall appearance of the subway station to users, monitors the abnormal situation of the IoT equipment online, and presents the energy consumption of the subway station clearly with the aid of bar graphs and ring graphs.

IoT device alarm visualization

In order to solve the traditional maintenance and management problems of various communication systems using decentralized communication, Tupu software adopts a centralized alarm platform to realize unified alarm of IoT devices. Including guns, smoke detectors, turnstiles, access control, ticket sales, temperature detectors, security checks, and flooding. Cooperate with the alarm time and the relevant data information for the maintenance of specific equipment failures to support the operation and management of the entire subway communication system.

Energy consumption information visualization

There are many factors affecting energy consumption in subway stations. Topu software establishes the energy consumption index system of subway stations, and uses the pie chart visualization effect of Tupu software to present the energy consumption of lighting, air conditioners, screens, communications and computer rooms. The graph shows recent trends in energy consumption and energy consumption. Operators can master the laws of energy consumption, limit energy consumption levels with unified standards, and discover operational problems and energy-saving potential.

One-click start

In order to ensure that all equipment can operate normally during the operation of the subway, a series of preparations must be done before the subway station starts. In order to ensure that the equipment is in good condition during operation, it is necessary to manually confirm whether the equipment is normal one by one before operation in the traditional way. The one-key self-check function built by the HT engine of Tupu software can realize the online automatic detection of key equipment and ensure the normal operation of the equipment before the site is opened. The calibration of each item lays the foundation for subsequent subway operations.

The one-key site opening function can realize one-key automatic startup of all equipment, and monitor equipment failures through BIM equipment health status perception to ensure that the equipment is normal before the site is opened.

Air Conditioning System Visualization

Tupu software HT has the ability to integrate and connect with other systems, and can connect to the air conditioning monitoring system through the background database or standard communication protocol. Effectively associate all the pipes and equipment of the air conditioning and ventilation system with the BIM visualization system. The 3D scene reads the real data of the air conditioner in real time through the data interface, and changes the content through the data on the 2D panel to optimize control and save energy.

Ventilation Control Visualization

In the dispatch center, the operating data of energy-saving opening and normal opening can be monitored and recorded, and the operation parameters of the return air system can be viewed remotely, such as the speed of the return air system, wind pressure, maintenance plan, etc., the start and stop of the exhaust fan and the current operation. Mode, when an unexpected situation occurs, an alarm screen will pop up on the system, and business personnel can view it through mobile phones or PCs and Pads to improve the intelligent operation of the subway.

Pipe network visualization

The HT engine of Tupu software adopts the realistic 3D configuration simulation technology to present the 3D rendering model of the distribution of the water pipe network of the subway station in a 1:1 ratio. .

Including basic information of circulating water supply-CHR-1 and domestic water supply system-J-2 (including material, size, pressure drop, flow rate, etc.).

water consumption visualization

Tupu software HT visualization uses rich charts and design elements to compare and display water consumption in 2021 and 2020, and display the change trend of water consumption within a year through a line chart, revealing the changing trend and internal connection mechanism of water consumption in subway stations . Strengthen planned water management for high water consumption projects, improve water use level and efficiency, and enhance water conservation awareness.

Calculation system

The subway has limited space, complex equipment, dense passenger flow, and limited exits. In the event of a fire accident, it will be difficult to exhaust smoke and heat, and the oxygen content will drop sharply, posing a serious threat to the safety of passengers. The HT engine of the Tupu software sets the digital twin of the subway fire accident and simulates the on-site alarm situation, so as to explore the shortcomings of the plan and improve the plan. It can also expand AI intelligent decision-making assistance, generate evacuation routes according to the police situation, and assist in improving the command plan. Avoid undue losses due to insufficient emergency response capability in the event of a fire.

security system

The fire-fighting linkage function of the subway station has a direct connection with the integrated monitoring system, temperature-sensing optical fiber system, fire alarm system and other supporting control systems and equipment facilities in the station. When an emergency such as a fire occurs, the security system can locate the accident point in real time, and activate the intelligent command system based on the spatial position and equipment status of the BIM model elements.

The 2D panel accesses the security system information, including the material, water pipe type, size, pressure drop, flow and speed of the fire protection system. And display the specific positions of X-1, SP-1 and ZP-1 in the form of icons in the 3D scene. Provide commanders with intelligent plan calling and resource allocation, and realize visual command of emergency response.

surveillance system

Through seamless integration of video technology, Tupu software HT accesses the corresponding camera video images, and forms a twin linkage of the subway 3D scene with the platform, equipment layer, station hall, underground, etc., to achieve scene restoration. Various surveillance videos are displayed on the right side of the scene, visually displaying the operation information of each location. The system supports to retrieve the video surveillance history information of any monitoring point. Users can configure the time point of video monitoring by themselves, so as to provide guarantee for reviewing historical video and realize intelligent management of monitoring system.

personnel system

In the traditional subway personnel management, manual arrangement and paper records are generally used to implement backward methods, resulting in the ineffective exchange of information and the formation of "island effect", time-consuming and labor-intensive management. According to the actual situation of the subway operation site, Tupu software integrates the information of the subway working group, the inspection arrangement, and the work order arrangement, and displays it on the visual kanban. There are traces to follow, and management roles such as leaders can also view the problems reported by each position in real time. The information flow in the system is more clear, which meets the needs of the daily operation and management of the subway.

The 2D panel displays the working hours and on-duty information of the security, customer service, and maintenance groups, and statistically analyzes the inspection arrangement information of the platform foundation, drainage, power distribution, network equipment, and air-conditioning equipment in the form of graphs, supplemented by the work order arrangement information, which is convenient for subway management. The operator can grasp the subway operation situation in real time and improve the intelligent operation ability of the subway.

Power distribution cabinet visualization

The Tupu software adopts the HT BIM lightweight modeling method to digitally twin the power distribution cabinet, and monitors the security status of the power distribution room online in real time according to the actual operation principle of the subway power distribution and the operation of the equipment. When an accident such as circuit breakage and overload occurs, a high-light alarm will be generated in the scene to remind business personnel to deal with it quickly and reduce labor supervision costs.

Basic information visualization

And use interactive, 2D configuration panel and other forms to display the basic information of the equipment of the power distribution system, including the power supply mode of the power distribution room, main transformer parameters, voltage level, temperature, humidity and other important parameters.

Abnormal device visualization

Integrating the power distribution system of subway stations, connecting equipment early warning and fault information, Tupu software HT can realize information management of abnormal equipment. Online monitoring of distribution box current, contact temperature, spring energy storage status and other important information. Improve the accuracy and efficiency of inspections and ensure the safe development of operation and maintenance work.

Computer room system visualization

The system can display the external structure of the computer room system from multiple angles, and business personnel can observe the entire scene in an all-round way through the adjustment and change of viewpoints and perspectives. Left-click on the designated combination cabinet to view the corresponding operating status, health, model, maintenance time, commissioning time, resistive current and leakage current and other parameters, providing strong support for the monitoring of the subway station computer room.

The 2D panel on the right is linked to the 3D scene to monitor the comprehensive status of the equipment room online and the basic information of the equipment. Including monitoring the number of cabinets and battery cabinets, set temperature, and health status.

One key station

After the subway operation is over, the subway station staff need to do some finishing work. For example, the safety inspection of vehicles and stations, the investigation of hidden safety hazards in the station, and so on. The one-key key station system can greatly shorten the station closing time and workload, and realize intelligent station work.

Linkage with BIM equipment status perception data to realize remote intelligent video inspection from a BIM perspective; automatically set inspection content and inspection routes, and provide an event reporting function for security events or faults found during inspections. And linked to open escalators, gates, shutter doors and other related emergency equipment, automatically release emergency information, broadcast, PIS linked broadcast, to ensure operational safety.

Xi'an Line 6 Smart Station

At Guoduxi Station of Xi'an Line 6, Tupu Software's BIM lightweight solution was used to build a smart station. The system comprehensively improves the automation and intelligence of operations through four business segments: passenger transportation organization, equipment operation management, passenger service, and personnel management. Fill in the blank of the subway in the southwest area of our city, and relieve the traffic pressure along Xitai Road, Jinye Road and Gaoxin Road.

BIM Construction Management

It is difficult for traditional CAD drawings to show the arrangement of steel bars, but BIM can be used for dynamic demonstration to better show the construction plan, which is conducive to construction and technical disclosure. Tupu software takes advantage of the advantages of BIM technology in visualization and simulation to carry out 3D modeling of the details of the buildings and greening in the park, output the OBJ format model, and render it through the HT engine to restore the overall layout through simulation. The floor and the asset construction within the floor are separated, and the dynamic restoration demonstrates the construction process of the building. And make video animations to reduce development costs.

Business personnel can intuitively and accurately grasp the entire construction process and technical points and difficulties, and avoid quality and safety problems caused by unclear process and lack of technical experience during construction.

Realize value

Design visualization

The HT engine of Tupu software relies on various visualization modes of BIM tools, including hidden lines, coloring with borders, and real rendering, and adopts 3D configuration to provide customers with more intuitive design solutions.

BIM lightweight processing

The electromechanical professional models of the subway station are integrated into an overall BIM model, so that the collision point between the electromechanical pipeline and the building can be visually presented in a three-dimensional manner, and the pipeline arrangement scheme is optimized. HT BIM optimizes the network loading speed by compressing the model information, the same model file size is only one tenth of the OBJ text format. By using the existing BIM model, the modeling cost is saved, and the BIM information is retained, which greatly facilitates users to develop visualization applications using the existing BIM system.

spatial visualization

Using the BIM model, the reasonableness of the building equipment space can be checked in advance. Tupu software makes full use of the advantages of BIM engineering construction animation to visualize the existing conditions and construction sequence of the construction site, so as to express and reflect the details, construction process, technological process and operation principle of the building construction process in a detailed, systematic and intuitive manner. And the construction preview of various construction projects. The button in the upper right corner of the panel can be clicked to interact, from the animation process to the floor display, to achieve better progress control. To achieve the purpose of reducing risks, reducing construction waste, and safe construction, keeping "accidents" away from construction.

The HT BIM visualization solution provides a lightweight approach in the model preprocessing stage and the model loading presentation stage. Through the functions of model snapshot, parametric model, BIM component filtering, and intelligent analysis of model 3D information, the number of triangular faces of the model is greatly reduced. Through the BIM to OBJ function and the function of changing the color and changing the texture through the API after loading, the appearance of the BIM model is optimized, and the status display is realized according to the data collected by the application system.

Relying on the powerful WebGL 3D engine of Tupu software HT, it can be used to develop various BIM visualization scenarios, such as substation visualization, computer room visualization, factory visualization, etc.

Summarize

A smart station is a symbol of urban modernization, enabling convenient travel for passengers and efficient management of stations. With the continuous in-depth development of 5G, big data and artificial intelligence, more application scenarios will be unlocked and diversified cross-border cooperation will be realized. Relying on BIM, Internet of Things, mobile Internet and other technologies, Tupu software realizes the perfect combination of subway intelligence and refinement, and conducts pre-planning, process control and post-event analysis for each process and link in subway management to achieve multi-party collaboration of the project. Office, data interconnection, eliminate information islands, and finally comprehensively improve the refined management of subway stations.

For more industry application examples, please refer to the case link on the official website of Tupu Software:

https://www.hightopo.com/demos/index.html