The Science and Technology Winter Olympics are "planned, effective and expectant"
The Beijing Winter Olympics venues have achieved new breakthroughs in key technologies in many aspects; the Yanqing Competition Area Alpine Ski Center and Zhangjiakou Competition Area carry out artificial snowmaking operations
Beijing News (Reporter Wu Wei) On November 18, the Beijing Winter Olympics Organizing Committee held a press conference to introduce the work of the "Science and Technology Winter Olympics".
Yu Hong, director of the Technology Department of the Beijing Winter Olympics Organizing Committee, counted the achievements of the "Science and Technology Winter Olympics" in terms of venue construction and green Olympics since the preparations for the Winter Olympics.
"Looking back on the work of the Science and Technology Winter Olympics in the past few years, it can be summed up in 9 words: planned, effective and expected." Yu Hong said.
According to Wu Yuanbin, director of the Department of Social Development and Technology of the Ministry of Science and Technology, through technical research, the Beijing Winter Olympics will achieve new breakthroughs in key technologies from planning and design, construction to operation and maintenance services, and support the high-quality construction of the Winter Olympics venues.
New technology application
"Snow Youlong" track is cast in one shot
"The actual application of new technology in the Winter Olympics, we first pay attention to the venues, which are the basic conditions for hosting the Winter Olympics." Yu Hong said.
The National Speed Skating Stadium adopts the world's largest single-layer bidirectional orthogonal saddle-shaped cable net roof, and the steel consumption is only one-fourth of the traditional roof.
The national snowmobile sled center known as "Snow Youlong" adopts "millimeter-level" hyperboloid concrete spraying and finishing molding technology, and the 1.9-kilometer track is sprayed and poured at one time.
The National Aquatics Center has been converted from the Water Cube to the "Ice Cube", using assembly-type quick disassembly and leveling dynamic monitoring technology to complete the "water-ice" site conversion within 20 days.
Shougang Ski Jump has developed regular tetrahedral modules and regular tetrahedral connection nodes to realize the conversion of track profiles in different competitions.
The 5G signal covers all venues and the roads connecting the venues, including the Beijing-Zhangjiakou high-speed rail, and also has stable and continuous 5G signal coverage.
This provides necessary network connections for application scenarios such as ultra-high-definition video and various intelligent services.
The Winter Olympics weather forecast system realizes "hundred-meter-level, minute-level" precise weather forecasting.
In the February test event, according to the weather forecast, the schedule of 12 games and training was adjusted.
Green Olympics
All domestic relay torches will use hydrogen fuel
"Green is one of the goals of this Winter Olympics." Yu Hong said that in order to achieve the carbon neutral goal of the Beijing Winter Olympics, the Zhangbei flexible DC power grid project was implemented, and the wind and solar energy production in Zhangbei The green electricity is imported into Beijing.
During the event, all venues for the Beijing Winter Olympics will achieve 100% green power supply.
The National Speed Skating Stadium, Wukesong Sports Center and other venues have selected a carbon dioxide transcritical refrigeration system, the temperature difference of the ice surface is controlled within 0.5 ℃, and the carbon emissions are close to zero.
At the same time, the integrated cooling and heating design is used to recycle the cooling waste heat, and the energy efficiency is increased by 30%-40%.
During the competition, more than 700 hydrogen-fueled buses will provide transportation services in Yanqing and Zhangjiakou. The trial-produced hydrogen fuel cell emergency power generation vehicle replaces the diesel generator vehicle and has been tested in the National Speed Skating Stadium and the National Alpine Ski Center.
Yu Hong revealed that all the relay torches in the Beijing Winter Olympics will use hydrogen fuel.
Degradable tableware produced from renewable resources such as corn, potato and straw as raw materials will replace plastic products to provide relevant services for the Winter Olympics.
Broadcast technology
Free perspective allows spectators to choose the viewing angle and timing
Broadcasting is indispensable in the modern Olympics.
Yu Hong introduced that the Beijing Winter Olympics will have 5G signal coverage and a new mode of broadcasting.
On the basis of the test competition, the cloud broadcasting technology will cooperate with the Olympic Broadcasting Service Company (OBS) during the competition to provide bullet-making time in the "Slope Obstacle Skills of Yunding Ski Resort" project.
The video service system for the press conference of the Beijing Winter Olympics will add audio and video content for press releases on the basis of traditional text information services.
The 8K HD OB van recorded and broadcast the short track speed skating event in October, which lasted 22 hours.
In addition, the free viewing angle allows the audience to freely choose the viewing angle and time on the screen; the panoramic picture guide of the stadium can browse the stadium online; the accurate indoor navigation helps the audience quickly reach the seating area of the stadium; the upcoming 8K channel will allow Spectators have the opportunity to watch the 8K game on TV during the game, and also have the opportunity to see the ultra-high-definition picture through the 8K terminal in the Winter Olympic venues, city squares and other places.
Follow 1
Artificial snowmaking will not affect regional water safety and ecological environment
Zhao Weidong, Director of the Press and Propaganda Department of the Beijing Winter Olympics Organizing Committee, introduced that the Beijing Winter Olympics snow event competitions are mainly located in the Yanqing and Chongli mountainous areas.
On November 6, Beijing ushered in the early snow of this winter, and Zhangjiakou also ushered in widespread snowfall.
According to observations, the amount of snowfall in Yanqing and Zhangjiakou has reached the magnitude of a blizzard.
"Using this round of cooling and snowfall weather, the Yanqing Competition Area Alpine Ski Center and Zhangjiakou Competition Area will actively carry out artificial snowmaking operations."
Zhao Weidong said that in order to ensure the quality of snow used in competitions, artificial snowmaking is basically used in major international events.
Artificial snowmaking will not have an impact on regional water safety and ecological environment.
According to data from the Beijing Water Affairs Bureau, the water demand during the Winter Olympic Games accounts for 1.6% of the current total water consumption in Yanqing District and 4‰ of the local water resources in Yanqing District; the post-match water demand accounts for 2.3% of the current total water consumption in Yanqing District. %, accounting for 6‰ of the local water resources.
Therefore, there is no shortage of water resources in the Yanqing area, and the water consumption during and after the Winter Olympics will not affect the water safety of the Yanqing area.
During the game, the water demand of Zhangjiakou competition area accounted for 9.8% of the total water consumption of Chongli District and 2.8% of the water resources of Chongli District.
The above data shows that Zhangjiakou residents' domestic water will not be affected by snowmaking.
Zhangjiakou City has implemented the Yunzhou Reservoir Water Diversion Project. Since its completion, the project has transferred a total of 5.216 million cubic meters of water to Chongli District, effectively reducing the amount of groundwater extraction in Chongli District and preventing the decrease of groundwater level.
In addition, ski resorts prioritize the use of collected and stored natural precipitation and surface runoff as artificial snow-making water sources.
The artificial snowmaking system adopts the world's most advanced high-efficiency water-saving artificial snowmaking equipment and intelligent snowmaking system, which can maintain the best snowmaking efficiency according to the dynamics of the external environment and save water.
Through real-time monitoring of weather and other conditions, choose the most suitable conditions to start the snow machine to avoid the waste of water resources caused by snow making.
Follow 2
The ski resort and the hospital establish an interconnected rescue and early warning system
"The Winter Olympics snow events are characterized by high difficulty and high risk. The weather conditions in the Zhangjiakou competition area are complicated. Windy and cold weather, steep slopes, and ice-like snow tracks will all become difficulties and obstacles to first aid on site. Getting quick and effective treatment in one time is an important link in the service guarantee during the Winter Olympics." Li Congmin, deputy director of the Hebei Provincial Department of Science and Technology, introduced that the Chongli District of Peking University Third Hospital has established a ski resort and Chongli District. The interconnected rescue and early warning system and information platform have built a closed-loop and integrated medical treatment system from the stadium to the medical station, ambulances, helicopters and designated hospitals, which solves the problem of telemedicine services during emergency transportation and provides patients Provides fast, high-quality, and efficient treatment.
At present, it has successfully guaranteed 6 World Championships, and achieved good results in the actual test of the Winter Olympics in February 2021.
The platform system will be used in the treatment of snow sports injuries in the Winter Olympics.
Li Congmin introduced that in terms of ensuring sports safety, Zhangjiakou competition area has applied self-developed wind-proof net technology in Yunding Ski Park.
This technology breaks the foreign monopoly, solves many problems such as high construction cost and long construction period, and its windproof performance, mechanical properties and visual effects have reached the international leading level.
In terms of ensuring the safety of venues, Yunding Ski Park uses a smart operation management system, integrating 3D panoramic security consoles, mobile smart sentry vehicles, identity recognition passenger flow analysis, contactless guest room smart recognition door locks and other technologies.
At the same time, the ropeway safety operation guarantee technology has been applied to solve the problems of rapid detection and monitoring of special equipment in the severe cold and complex environment, fault warning and efficient emergency response, and ensure the safe operation of passenger ropeways for the Winter Olympics.
In addition, Zhangjiakou has applied a number of new technological achievements in areas such as complex mountain weather forecasting, safe driving of passenger cars, food testing for the Olympics, forest fire safety, etc., to fully escort the safe holding of the Winter Olympics.