The opening ceremony of the XXIV Winter Olympic Games was held on the evening of February 4 at the National Stadium. Beijing, an ancient city of the Orient, has once again attracted the attention of the world, becoming the first "City of Double Olympics" in the history of the Olympic Games to host the Summer Olympic Games and the Winter Olympic Games!
In this Winter Olympic Games, many Chinese universities have deeply participated in it, contributing design ingenuity and scientific and technological wisdom to help the Winter Olympics. College student volunteers from colleges and universities around the world gave up their homecoming reunions and fully served the Winter Olympics.
Today
Xiaobian has sorted it out for everyone
Those "university powers" in this Winter Olympics
Check out if there's your school!
Since the successful bid for the Winter Olympics, the "Science and Technology Winter Olympics" has been vigorously promoted, the "Science and Technology Winter Olympics (2022) Action Plan" has been fully launched, and the key special projects of the national key research and development plan "Science and Technology Winter Olympics" have been promoted in an orderly manner, and a series of scientific and technological innovation achievements have been achieved. According to incomplete statistics, Zhejiang University, Fudan University, Shanghai Jiao Tong University, Beihang University and many other domestic universities have contributed scientific and technological wisdom to help the Winter Olympics.
Zhejiang University: Weaving a cool "ice ribbon"
As the only newly built ice competition venue, the National Speed Skating Hall "Ice Ribbon" has contributed to the world the "Chinese Plan" for the construction of Olympic venues composed of Chinese design, Chinese technology, Chinese materials and Chinese manufacturing. Among them, the team of Professor Luo Yaozhi of the School of Civil Engineering and Architecture of Zhejiang University and the team of Professors Deng Hua and Yuan Xingfei have provided important scientific and technological forces for the construction and operation and maintenance of the "ice ribbon" super-span cable network structure.
The roofing system of "Ice Ribbon" adopts hyperboloid saddle-shaped single-layer cable net structure, which is currently the world's largest span of single-layer two-way orthogonal saddle-shaped cable net roofing gymnasium. The so-called cable net structure, simply put, is a large net woven from steel cables. Such a large net "buckles" above the speed skating hall, forming a saddle-shaped hyperboloid roof.
Compared with the traditional rigid roof structure system, the flexible cable mesh roof greatly reduces the amount of steel used in the structure under the premise of meeting the structural function, so the exquisite space design provides a guarantee for energy saving and environmental protection.
In addition to the monitoring of the "ice ribbon" roof, the Zhejiang University team also carried out structural monitoring of the under-ice concrete of the speed skating hall. The "Ice Ribbon" adopts an all-ice design, but also adopts the most advanced ice-making technology, and the ice surface temperature difference can be controlled within 0.5 °C.
During the construction of the "Ice Ribbon", another group of people from the School of Civil Engineering and Architecture of Zhejiang University also played an important role. In order to better solve the problem of roof construction, the team of Professor Deng Hua and Professor Yuan Xingfei carried out the key technology and model test research of the construction of the long-span cable net roof structure of the National Speed Skating Hall through the 12:1 shrinkage model.
Fudan University: Intelligent Ice Sports Training Analysis System
How to empower the sports training of Winter Olympic athletes through artificial intelligence? Zhang Lihua, professor of the Institute of Engineering and Applied Technology of Fudan University and executive vice president of the Institute of Intelligent Robotics, developed an intelligent ice sports training analysis system. The main technical indicators of this system were adopted by the 2022 Beijing Winter Olympics, allowing "intelligent" coaches to personally guide you to become an "ice and snow elf"!
3D model visualization of moving targets
The system uses artificial intelligence computer vision algorithms to intelligently analyze and compare the movements, postures, speeds and other information of skaters, from qualitative, quantitative to customized analysis of the characteristics of each athlete, improve the level and efficiency of scientific training, effectively reduce the workload of coaches, and achieve scientific training, effectively improve the training effect of athletes and competition results.
"We use artificial intelligence technology to analyze the skeleton of ice athletes, the movements of each joint, and the posture, which is called the identification and visualization of the skeleton nodes of the movement target." Zhang Lihua introduced.
In the future, Zhang Lihua's team will carry out competition training analysis algorithm and application system research for professional and mass sports projects, realize intelligent applications such as training auxiliary analysis and competition auxiliary refereeing according to the existing infrastructure construction competitive sports training intelligent analysis platform, and build demonstration intelligent sports competition venues and mass sports intelligent demonstration facilities, so that the masses can feel the new experience brought by "intelligent" services in daily sports.
Shanghai Jiao Tong University: Self-developed ski robot
Recently, the six-legged ski robot designed and developed by Shanghai Jiao Tong University completed the primary road, intermediate road and co-skiing experiment in Shenyang, and passed the tests of stability control, intelligent perception, planning decision-making and so on. This ski robot was developed under the call of the "Winter Olympics of Science and Technology", led by Professor Gao Gao of Shanghai Jiao Tong University, and composed of the School of Mechanical and Power Engineering and the School of Electronic Information and Electrical Engineering of Shanghai Jiao Tong University, and won the key special support of the National Key Research and Development Program of the Ministry of Science and Technology "Science and Technology Winter Olympics".
Not only can you ski at high speed, but you can also avoid the crowds and plan your own optimal route. The test of the ski robot in the beginner and intermediate slopes has proved that it has agile cornering, braking ability and strong autonomous perception and planning ability. It can slide at high speed in the snow field, encounter obstacles and make sharp turns, continue to maintain its own healthy ski posture, and complete the "flag gate" task in alpine skiing in the process of sliding, which can achieve good speed and direction control, and has functions such as sliding, emergency stop, obstacle avoidance, and pole circumference.
According to reports, the ski robot developed by the foot robot team of Shanghai Jiao Tong University is a six-legged robot that uses skiing. The four legs in the middle are divided into two groups, each two legs are fixed to a ski, which is used to control the position and posture of the ski, and the two legs on both sides are equipped with ski poles to imitate people and realize the function of the cane. Each ski has five degrees of freedom, and by controlling the posture of the board, you can achieve functions such as speed control, turning and braking.
Ski robots are not only the intuitive embodiment of the "Winter Olympics of Science and Technology", but also provide unlimited imagination for the post-Winter Olympic era with the concept of "human-machine integration". The research team said, "After the Winter Olympics, this robot can also combine the current 5G, wireless network and other advanced technologies, through remote control, to achieve ski robots in the same field, to create a new entertainment mode of electricity-machine-competition, and to create a new trend of entertainment with full of high technology for ski enthusiasts and teenagers." ”
Beijing University of Aeronautics and Astronautics: Aerospace science and technology help ice and snow training to win the battle
Technology to help competitive sports need scientific training to be able to win the millimeter, what are the ways to improve the speed of athletes? Where to turn and where to change posture is the most appropriate and appropriate? The team of Professor Ke Peng of Beijing University of Aeronautics and Astronautics has developed a set of training artifacts.
According to reports, Ke Peng, associate professor of the School of Transportation Science and Engineering of Beijing University of Aeronautics and Astronautics, led the team, starting from 2019, fully drawing on the basic theories and technical methods of aeronautical engineering, and has undergone meticulous research in every link such as clothing, equipment, movement, and ice friction. Aerospace technology has been introduced into when athletes accelerate, how to turn, how to reduce drag, taxi route selection, physical energy distribution and pace optimization, especially to find the best taxiing route for Chinese athletes, and to make training more scientific with the help of technology.
Chongqing University: R&D monitoring system for temporary facilities at any time "physical examination"
In order to ensure the safety of large-scale temporary facilities, Professor Liu Gang, a member of the "Science and Technology Winter Olympics" team of Chongqing University and the School of Civil Engineering, developed a large-area high-capacity temporary facility safety operation and maintenance monitoring system under the complex terrain of the cold mountainous area. He told the Horizon Network reporter: "By installing environmental sensors such as temperature and humidity on the temporary facilities, as well as structural response sensors such as vibration, inclination and strain, the status of the temporary stands is monitored in real time, and the facilities are 'physically examined' at any time."
Small plugs bring great protection
Most of the temporary facilities for the Winter Olympics are built on scaffolding, so the safety and security of each connection point is very important. At each joint on the scaffolding of the laboratory testing site, several latches are inserted to achieve fixation and linking. To this end, the "Science and Technology Winter Olympics" team of Chongqing University has developed a set of equipment to achieve physical examination of the scaffolding of the entire arena with drones. Just by taking a photo, you can detect whether the latch in the photograph range is in place.
At present, the "Science and Technology Winter Olympics" team of Chongqing University has installed a total of 30 sets of equipment in Chongli and Yanqing competition areas to monitor the safety of temporary facilities, and the equipment will not be dismantled until after the end of the Winter Olympics and Paralympic Games, during which all monitoring data will be sent to the on-site operation and maintenance personnel in real time to maintain the temporary facilities frame in time.
Key patented technologies ensure the safe operation of temporary facilities
In addition, there is frozen soil under the arena, how to ensure the safety of the building? The "Science and Technology Winter Olympics" team of Chongqing University has developed a new type of pile suitable for the rapid treatment of freeze-thaw cycle frozen ground foundation with patented technology suitable for large-area complex structural loads in severe cold mountainous areas.
In layman's terms, the temperature reaches below zero, the water in the soil becomes ice, and with climate change, the frozen soil is constantly expanding and sinking. If the soil of the foundation is unpredictable, the foundation laid will also be affected, and the buildings on the ground will not be stable. Professor Liu Gang said, "The new pile body adopts a spiral blade design, which is convenient for mechanical spiral drilling construction, so as to achieve rapid and weak disturbance construction, single pile construction only takes more than ten minutes; it can be reverse screwed and recycled to achieve the concept of green Olympic Games." ”
Not only that, in addition to significantly improving the bearing capacity of the new pile developed, the biggest feature is that the pile body uses isolation sleeve design in the deep frozen soil layer section, which isolates the central bearing steel pipe from the surrounding frozen soil, eliminating the impact of frost expansion and thawing of the foundation soil.
Tsinghua University: Intelligent heating equipment
During the Winter Olympics, whether it is the staff or the live audience, the low outdoor temperature in winter is a big trouble. How to warm the game in extremely cold conditions? Cao Bin, associate professor of the School of Architecture of Tsinghua University, has specially developed the "heat guarantee" in the extremely cold environment, and developed the "warm equipment" in the extremely cold environment - intelligent heating clothing and heating cushions, which can quickly heat up and lock heat in a short period of time. With the mode selection of the mobile app, it can replenish the heat of important parts of the human body. Similarly, the black seat cushion opens the switch and can quickly heat up and lock heat in a short period of time.
The planning and design of the overall and all venues of the Zhangjiakou Division of the Beijing 2022 Winter Olympics and the Shougang Venues in Beijing is led by the team of the School of Architecture of Tsinghua University. Zhang Li, dean of the School of Architecture of Tsinghua University, served as the chief designer of the Zhangjiakou Division and the Shougang Ski Jump at the Beijing Winter Olympics, and he hosted the National Ski Jumping Center "Xue Ruyi" and the Shougang Ski Jump.
It is reported that in the past, the jumping platform of the Winter Olympics jumping platform venues had a gap of more than 100 meters, which ordinary people could not use and could not provide a good sightseeing experience. In this regard, Zhang Li's team follows the "2.5-hour slow travel experience" principle commonly used in urban design. Between the stadium groups, a pedestrian bridge "Ice Jade Ring" was added, with a total length of 1.7 kilometers in the western half of the ring and a height of 7 meters from the ground, which is convenient for spectators to travel back and forth between the venues, forming a slow travel experience. At the top of "Snow Ruyi", it is a summit club with a circular space, using VR technology to create a circular shared space. In the design of the Shougang Ski Jump, Zhang Li said, "With the help of human factors technology, we start from the southeast direction, do a test scene every 5 degrees, and ask volunteers to help judge." "In the process, the tester's skin electricity, as well as the length of time of gaze on the platform, cooling tower and west mountain, etc., determine the final position of the platform based on the test data.
Harbin Institute of Technology: Curling robot system
Automatically pinch, release curling, hit targets accurately... Curling robots will be unveiled at the Beijing Winter Olympics, not only performing during curling competitions, but also interacting with the audience at the mass experience field. Harbin Institute of Technology, together with Heilongjiang Provincial Institute of Physical Education, Harbin Institute of Physical Education and other sports professional teams to form a research and development team of more than 20 people, conceived and designed a robot that can cooperate with people to complete curling competitions, and realize artificial intelligence to empower ice and snow sports. The R&D team will further develop a curling robot system for mass sports.
"Watching the Winter Olympics on the high-speed train"
The main line of the Beijing-Zhangjiang high-speed rail intelligent EMU has a total length of 174 kilometers, realizing the world's first 350km/h fully automatic driving, which is an intelligent upgraded version of the Fuxing and realizing the wish of "sitting on the high-speed rail to watch the Winter Olympics". The skin of the two locomotives of the Beijing-Zhang high-speed railway, "Dragon and Phoenix Chengxiang" and "Ruixue Yingchun", is the team of Professor Wang Guofeng of the School of Materials of Hitachi University of Technology using a rapid superplastic molding process to help achieve manufacturing and production. "Dragon Phoenix Chengxiang" and "Ruixue Yingchun" adopt bionic and aerodynamic principles, and are imitated in "Eagle Falcon" and "Sailfish" respectively. Its streamlined bionic front model can effectively reduce gas diversion, reduce air resistance, reduce internal consumption, and ensure speed.
Water cube becomes ice cube
In 2019, the National Aquatics Center of the "Double Olympic Venue" for the first time produced four Winter Olympic standard curling tracks through "water ice conversion", so that the venue can switch freely between "water function" and "ice function", and has the ability to carry out water, ice sports and various large-scale activities.
Professor Zhang Wenyuan's team from scratch, Harbin Institute of Technology School of Civil Engineering, proposed a structural scheme for converting ice rinks, all steel structures, concrete panels are assembled, can be installed at any time, 10 to 20 days can be completed, not only high efficiency, good economy, but also can be reused.
The scientific research team led by Professor Lu Shiliang of the School of Architecture of Harbin Institute of Technology has transformed the roof membrane structure of the National Aquatics Center to build a low-humidity and low-temperature environment required by the ice cube to escort the curling competition of the Winter Olympic Games.
Dalian University of Technology: Aerospace science and technology empower ski helmets
It is understood that this ski helmet uses aerospace thin-walled structure design technology. The research team of Dalian University of Technology used the design technology of curve reinforcement and stiffness, and the material of the helmet was also innovated. While maintaining the impact toughness, the stiffness is increased by 4 times, the tensile strength is increased by 3 times, and the impact absorption efficiency of the helmet is greatly improved, forming better protection for athletes. Today, the helmet has been tested by the European Ski Helmet Safety Standard and is used in the training of the professional team of the Continental Snow Aerial Skills Project. It is worth mentioning that its weight is only about 700 grams, and the protective performance is at least 20% higher than the European standard without significantly increasing the thickness and weight.
Beijing Forestry University
Beijing Forestry University science and technology services Beijing 2022 Winter Olympics Zhangjiakou Area Chongli core area ecological landscape construction. The technical team carried out work in accordance with the two main lines of space line (global area) and time line (full time), and built three major spatial circles in the core area ecological landscape competition area, the venue circle layer, the supporting facility circle layer and the ecological base circle layer; carried out accurate monitoring and policy implementation of the whole process of forest green trees, integrated innovative series of key technologies, and ensured the survival rate. The team also repaired the damaged area of the mountain, achieving full coverage of the whole area without leaving white space and green.
At present, the core area of the Winter Olympics has built a complete ecological landscape system, the forest coverage rate has reached more than 80%, the ecological environment has been continuously optimized, and the air quality has led the province, which has made comprehensive preparations for the Winter Olympics.
Northeastern University
How to apply technology to simulate the real alpine skiing field environment? Northeastern University collects and uses VR to reconstruct and display the information of the ski scene. The results can help athletes conduct pre-game simulations to better adapt to the competition environment in advance; can assist coaches in correcting athlete training movements, thereby effectively improving training efficiency; and can also be used for ski training for athletes in spring, summer and autumn, and indoor simulation skiing experiences for non-athletes.
The VR ski experience system can be used by skiers in a variety of ways during the preparation process, including advance inspection of the competition venue, early adaptation to environmental changes, practice of competition routes, etc., and at the same time, ski science popularization can be carried out for the public, helping everyone to master skiing skills, enhance safety knowledge, and lay a certain foundation for them to go to the ice and snow.
[Source: China Education Online organizes self-talk education and the official websites of various universities. 】
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Editors: Han Yan and Zhaofu