"Recently, patients who went to the Xizhimen District of Peking University People's Hospital found that the "vehicle queue" that often stretched for hundreds of meters disappeared, and the surrounding roads became smooth. Multiple hours reduced to about 10 minutes now.
Not far from it, on the third floor of the office building of the Urban Management Committee in Xicheng District, Beijing, on the big screen of the "Comprehensive Traffic Governance Auxiliary Decision-Making System", the traffic operation around the hospital is clear at a glance: vehicle parking, resource occupancy of surrounding parking lots, and shared bicycle parking Situation... The managers use the digital system to grasp the regular characteristics of various types of traffic travel, and put forward traffic management suggestions such as improving the drop-off location, intelligently dispatching shared bicycles, and sharing parking resources in the hospital. "
The above content comes from a report titled "Digital Twins Make Cities Smarter" published by People's Daily on May 17. The application of digital twin technology in urban management has gained more and more attention. focus on.
Effective governance practices reflect a new picture of accelerated construction of digital twin cities in my country. In 2022, the market size of my country's digital twin cities will be 5.1 billion yuan, with a compound annual growth rate of 50%.
What are the characteristics of digital twin technology? How to build a digital twin city, and what role will it play? The following will answer you one by one.
Digital twin technology helps cities run efficiently
A modern city is a complex open system. In recent years, the rapid development and popularization of digital twin technology has brought new ideas and solutions to urban planning, construction, governance and management.
"Digital twin is to make full use of the physical model and the data of the whole life cycle operation history collected by the sensor of the Internet of things, integrate the simulation process of multi-discipline, multi-physical quantity, multi-scale and multi-probability, and complete the mapping in the virtual space, so as to reflect the corresponding entity The whole life cycle process of an object." Li Deren, academician of the Chinese Academy of Sciences, academician of the Chinese Academy of Engineering, and professor of Wuhan University, said that digital twin technology, as a key way to realize two-way mapping, dynamic interaction, and real-time connection between virtual and real And transforming the physical world provides a new effective means.
The application of digital twin technology to the city can simulate and emulate various elements and data of the city. Industry experts said: the digital twin city is based on the building information model and the three-dimensional geographic information system of the city, uses the Internet of Things technology to digitize various elements of the physical city, and then constructs a completely corresponding "virtual city" in cyberspace. City", forming a physical city and an informational digital city co-existing and blending the virtual and the real.
Technically, the digital twin city combines multiple cutting-edge technologies such as the Internet of Things, big data, and artificial intelligence, focusing on data management, information models, and simulation analysis. For example, Li Dehong, Qiushi Chair Professor of Zhejiang University, collects all kinds of data in the city through the Internet of Things technology, and then transmits it to the cloud for processing and analysis, which constitutes the "base" of the urban digital twin model; Data processing and analysis can realize real-time monitoring, forecasting and optimization of urban operations; virtual reality and augmented reality technologies present urban digital twin models in real scenes, allowing the public to more intuitively understand the city's operating conditions and development trends .
The construction and development of digital twin cities has entered the "fast lane"
At present, my country's digital twin city construction has entered the "fast lane". Building a digital twin city corresponding to a tangible city in terms of information can not only enable city managers to manage the city more efficiently, but also create conditions for the sustainable development of the city.
The "14th Five-Year Plan" Digital Economy Development Plan proposes to "improve the city information model platform and operation management service platform, and build a digital twin city according to local conditions." In recent years, my country has carried out many explorations and practices in digital twin cities.
In Jinan, Shandong, the four-dimensional geological environment visualization information system platform can realize automatic "cutting" in order to grasp the stratum structure, lithology, karst development characteristics and other information along the rail transit line, and provide guidance for the suitability analysis of rail transit lines; in Guangdong In Guangzhou, the "Suizhiguan" urban operation and management center is based on data such as hydrology, meteorology, and drainage facilities, combined with urban hydrological models (3D simulation) and electronic maps, to achieve a visual simulation of the evolution of waterlogging in waterlogged spots, providing Provide reference for flood control and disaster relief; Henan Lankao’s county-level energy Internet has embedded intelligent algorithms, which can deduce the operation results of different control strategies online; Support; Hebei Xiong'an New District will plan and build the digital city and the real city simultaneously, and the two cities will interact to create a digital twin city and a smart city...
Li Deren believes that the digital twin city has formed some representative application scenarios in the fields of traffic management, energy management, planning and design, environmental monitoring, etc. It has become an important direction for smart city construction and urban digital transformation.
Qianxun Location uses digital twin technology to build a "city of the future"
Digital twin cities have taken root and flourished everywhere, but they have also brought some new challenges.
In terms of technology, digital twin cities need to carry the efficient storage, processing and presentation of city-level multi-source heterogeneous data. There are many types of data and large volumes, which will test the platform's support capability and network bandwidth. In addition, the visual loading and real-time browsing of massive 3D spatio-temporal data, real-time updating of various data, etc. also require high hardware, time and labor costs.
Therefore, in order to provide stable and efficient digital twin services for cities, the soft technology and hard power of technology suppliers are particularly important. Qianxun location has an advanced technical level. Based on Beidou high-precision positioning and precise timing services, it integrates space-time intelligence and digital twin technology to create a precise space-time digital twin product system and provide more refined digital twin services. And formed a relatively complete product system architecture in the industry:
Qianxun Twinworld: An infrastructure management platform that builds a closed loop of perception-control data and realizes the refined management of the entire life cycle of "planning, construction, management and maintenance".
Qianxun Vision: A spatial-temporal data visualization platform that provides extreme visualization of 3D scenes and dynamic data, and shows a panoramic view of the digital twin operation situation.
Qianxun Digital Realm: loading and rendering of the digital world, super-realistic restoration of the physical world, a digital twin 3D map engine that supports spatial analysis and spatio-temporal data openness.
Qianxun Chiguan: An intelligent road inspection system with full life cycle management of road diseases, high-precision positioning targets, accurate calculation of disease areas, and structured output of inspection services.
Qianxun Haojing: a digital twin 3D data factory that realizes the distributed and lightweight processing of massive 3D data, and realizes the smooth loading of city-level ultra-large-scale 3D data and high-definition quality browsing.
Qianxun Jiandao: high-precision, low-cost, supports fusion with SD map data and can be used for simulation, highly automated production process, high-precision road collection and production platform with full-link independent intellectual property rights.
Qianxun Location not only widely applies the above products to the fields of urban digitalization and new infrastructure construction, but also helps build a "digital twin" world that accurately maps the real environment in real time. It also uses "time and space" as an entry point to connect real cities with digital cities. , innovatively put forward the best practice plan for the "city of the future", and systematically answer the three core issues related to time and space of the "new smart city";
Space-time basic platform: All static and dynamic "participants (such as: people, vehicles, objects, events, etc.)" in the city are being digitized, and converged and fused to form urban big data. Urban big data is the core resource of the new smart city, how to build a virtual digital city to effectively support the refined management of the city. Based on its own unique technical advantages, Qianxun Location "City of the Future" has built a unified "space-time basic platform" to process data in time and space, and then realize the "global, full-scale, high-precision, dynamic "Precise mapping" allows the "data" used in governance to correspond with reality one by one.
Spatio-temporal big data platform: New smart cities use big data to make decisions, and the spatio-temporal attributes of data are a necessary condition for data fusion analysis to support decision-making. Qianxun Location "City of the Future" is based on the unified space-time dimension of the "Spatio-Space Big Data Platform", which can integrate massive data, including urban spatio-temporal basic data, public thematic data, urban perception dynamic data, Internet crawled data, local characteristic data, etc. Integrate into the "spatial-temporal big data platform" to realize the superposition and availability of data. The above two platforms support the real-time mapping from the real city to the digital city. Not only can we understand the overall structure of the city, but also quantify the subtle changes in the city's operation due to the richness of urban perception data, providing intuitive and accurate information for the refined management of the city. Basic support.
Spatio-temporal computing and data-driven: The value of data lies in the discovery of laws. Qianxun's spatio-temporal brain is combined with urban data computing capabilities to form a "spatial-temporal computing engine", thereby supporting various applications to use spatio-temporal computing technology conveniently. Systematically build a digital city, on the basis of data aggregation and processing, through various application optimization and self-learning, realize the self-improvement and drive of urban planning, design, management, and operation, and integrate reality and virtual into one One."
The "City of the Future" program includes urban applications such as smart transportation, disaster prevention and reduction, smart urban management, smart environmental protection, and smart tourism, which can effectively improve urban governance, optimize urban operation efficiency, improve public satisfaction, and help the government embrace the city in the new era Manage the new challenges we face, realize the benign interaction between digital technology and urban governance, and enhance the people's sense of gain and happiness.