Reporter | Peng Xin
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Since the opening ceremony of the Beijing Winter Olympics, we have seen a variety of scientific and technological achievements such as artificial intelligence (AI), 5G, AR, naked-eye 3D and cloud to bring a shocking experience to the audience.
Now, with the progress of the Winter Olympics, the blind box of various technology applications has also been fully opened, which is reflected in the improvement of technology in the construction of venue infrastructure and green environmental protection, and various innovative technologies and materials are also making leaps and bounds in green environmental protection, smart services, logistics support, venue construction, energy-saving travel, communications and other aspects.
The ice-making secret behind the "ice ribbon"
The National Speed Skating Hall, also known as the "Ice Ribbon", is the only new ice competition venue in this event, and it is also the first speed skating venue in the history of the Winter Olympics to use carbon dioxide as a refrigerant. The ice surface is a key facility for the operation of the venue, and the National Speed Skating Hall has the largest all-ice design in Asia, with an area of nearly 12,000 square meters. The use of carbon dioxide transcritical direct cold ice making technology to make ice on such a large ice surface has no precedent in the previous Winter Olympic speed skating venues.
The carbon dioxide transcritical direct cold ice making technology enabled by the "ice ribbon" is very uniform in ice temperature, the maximum temperature difference can be controlled within 0.5 degrees Celsius, and the hardness of the ice surface is always consistent, which helps athletes to create sports performance.
Carbon dioxide refrigeration can be improved by 30% compared with traditional refrigeration methods, and researchers have calculated that the carbon dioxide ice system of the National Speed Skating Hall can save about 1.8 million kWh of electricity per year. The refrigeration system uses refrigerant or carrier refrigerant to take away the heat under the ice layer to achieve rapid cooling of the ice rink, which is generally discharged directly into the outdoor environment, but here, engineers rely on scientific and technological means to achieve recycling, can provide 70 ° C hot water for domestic hot water and dehumidification regeneration and other uses.
"Green electricity" helps the Winter Olympics carbon neutrality
The Beijing Winter Olympics will be fully carbon neutral. In terms of transportation, the use of hydrogen fuel cell vehicles is the highlight of this Winter Olympics, becoming a "hydrogen energy show", the Winter Olympics will demonstrate the operation of more than 1,000 hydrogen energy vehicles, equipped with more than 30 hydrogen refueling stations, is the world's largest fuel cell vehicle demonstration.
During the Beijing Winter Olympics, 212 "100% domestic" hydrogen fuel cell buses provided hydrogenation services through five "100% green hydrogen" hydrogen refueling stations, which is expected to achieve a fuel saving benefit of 0.28 liters per kilometer per vehicle, with a total fuel saving of about 9.6 tons, and achieve a carbon reduction benefit of 0.75 kilograms per kilometer per vehicle, with a total carbon emission reduction of about 30 tons. Energy-saving and clean energy vehicles account for almost 100% of passenger cars, accounting for more than 80% of all vehicles.
In order to achieve the goal of carbon neutrality for the Beijing Winter Olympics, the Winter Olympics implemented the Zhangbei Flexible DC Power Grid Project, which will input green electricity produced by wind and solar energy in the Zhangbei area into Beijing. During the event, 26 venues in the three major competition areas of the Beijing Winter Olympic Games will achieve 100% green electricity supply. Of course, some power supply safety inspections have also introduced intelligent collaborative robots to conduct uninterrupted inspections of key support points to ensure reliable power supply.
From catering to security, robots are everywhere in the Winter Olympics
Robots shine in the Winter Olympics, including catering robots, delivery robots, disinfection robots and so on.
The smart restaurant developed by Country Garden Qianxi Robot Group covers an area of 5400 square meters and can accommodate more than 1700 people at the same time. Robot elements are everywhere, there are robots responsible for stir-frying, there are robots responsible for making pot rice, want to eat Chinese food or Western food can be, and so after the robot makes a good meal, the food delivery robot will use the cloud rail transmission system in the air to send the meal to the location of the orderer.
Beijing Orion Star Technology Co., Ltd. double-arm collaborative robot "Dabai", then incarnated as a coffee "master", Dabai is composed of two six-axis collaborative robotic arms, left and right robotic arms can be started at the same time, can accurately perform a variety of different actions, only 4 minutes can complete the bean extraction, weighing, water, water, brewing and a series of coffee production processes.
The delivery robot provided by No. 9 Company, after a certain modular transformation and testing, can provide indoor patrol and security services in the Winter Olympic venues, real-time monitoring and management of the situation in the venues, and can also provide people with goods delivery services.
Intelligent disinfection robot equipped with excimer disinfection lamps.
There are some full-time disinfection robots that work silently in the stadium, unlike ordinary disinfection robots, in the face of complex object surfaces, the disinfection robots in the Winter Olympics can not only adaptively identify the shape of objects, but also independently plan the disinfection trajectory to achieve efficient and accurate killing, which is more suitable for working in an unmanned environment. The Institute of Automation of the Chinese Academy of Sciences equips the disinfection robot with excimer disinfection lamps, which emit 222 nanometer wavelength ultraviolet rays to disinfect the irradiated air and will not cause harm to the human body.
High-speed cameras and Beidou navigation assist athletes in training
In the Winter Olympic games, AI, high-speed cameras, and Beidou navigation technology have been widely used for athlete training.
For example, the ski jump biomechanical rapid feedback system, in the past, coaches mainly used ordinary cameras and image shooting equipment to shoot the athlete's sports trajectory, watch and analyze it afterwards, and propose an improved training plan. By setting up multiple high-speed high-definition cameras to collect three-dimensional motion data, AI can automatically identify the position of each joint node of the athlete, and calculate important indicators such as jumping pedal extension distance, starting joint angle, and vertical speed of jumping, so as to achieve three-dimensional motion capture and analysis of ski jumping.
For sports such as figure skating, there are more criteria for judging, and the AI system helps athletes improve the standardization and aesthetics of posture through three-dimensional skeleton node detection and posture estimation. The visualization of the 3D model of the sports target provides a clear motion model for the technical analysis of the athlete.
Beidou navigation digital snow feedback system uses the Beidou navigation system to realize the digitization of venue information and athlete taxi trajectory digitization, which can feedback information such as lifting height, injection speed, jump angle, displacement information and data comparison.
The 5G cloud broadcast behind ultra-high-definition broadcasting "big test"
5G and cloud broadcast technology will be adopted on a large scale in this Winter Olympics and will become a training ground for future sports broadcast technology. At present, the 5G signal has covered the competition venues and supporting facilities of the Beijing Winter Olympic Games, as well as the Beijing-Zhangjiang high-speed railway, the Beijing-Li Expressway and other traffic trunk lines.
The advantage of 5G cloud broadcasting is that broadcasters do not have to transport bulky and expensive broadcast equipment to the scene of the Winter Olympic Games, transfer the work of director, production, editing, subtitles and so on from the traditional broadcast vehicle to the cloud, complete the production and broadcasting process in the cloud, and truly realize the high-quality and low-cost broadcast of The Olympic Events.
For the first time, the Winter Olympics will be broadcast in 4K ultra-high definition format, and some important events will be broadcast in 8K format. In terms of the length of the event, the overall length of the month is 1,000 hours, and the content content of the broadcast will reach 6,000 hours, which is the largest in the past Winter Olympic Games. OBSCloud is a broadcast technology jointly created by Alibaba and Olympic Broadcasting Service Company, which was used for the first time at the Tokyo Olympic Games and provided cloud broadcast support for global broadcasting institutions, which is also the first time in the history of the Olympic Games to use cloud computing to support global broadcasting.
The high-speed rail 5G ultra-high-definition studio, which was launched during the Winter Olympics, is the world's first time to build an ultra-high-definition live broadcast studio on a high-speed train with a speed of 350 kilometers per hour, relying on 5G technology to achieve long-term stable transmission of ultra-high-definition signals. China Unicom deployed a 3.5G 200M network for the entire Beijing-Zhangjiang high-speed railway, and introduced 5G signals into the car body, which is the first case in the world.
The world's first 8K+5G ultra-high-definition video full-service broadcast vehicle. Image source: Zoomlion Super Clear/Collaboration Center
During the Beijing Winter Olympics, when spectators watch short track speed skating and figure skating events, users will enjoy a clearer picture and a more colorful viewing angle. The world's first 5G+8K ultra-high-definition video full-service broadcast vehicle completed by Zoomlion SuperQing/Collaboration Center will undertake the broadcast services of these two events, and the broadcast vehicle and technical support service team will cooperate with China Central Radio and Television Station to produce a full 8K public signal for the 2022 Beijing Winter Olympics short track speed skating and figure skating events. The actual broadcast of the event is expected to last from February 4 to the 20th, for a total of 17 consecutive days, with a total broadcast time of about 46 hours and a total recording time of more than 230 hours.
In view of the characteristics of ice and snow sports in the Winter Olympic Games, the self-developed 8K+ VR live broadcast system and free viewpoint (6DoF VR) technology are used to demonstrate and broadcast the ice and snow sports projects, and users can realize VR live viewing through mobile phones, VR helmets and TV screens.
In November, CCTV News officially launched the AI sign language anchor, based on the Beijing Zhiyuan Artificial Intelligence Research Institute", "Wudao 2.0" super intelligent model research and development, self-built system. AI sign language anchors can not only report news, but also can carry out live broadcast of event sign language, through body movements, expressions, fingers and other actions for sign language broadcasting, AI anchors have the ability to express sign language and sign language presentation effects, can provide professional and accurate sign language commentary, easy for people with disabilities to watch the event report.
The technological innovation behind the garment
Due to the needs of the special climatic conditions of winter sports, uniforms must resist cold, wind and warmth, but also breathe and breathe, light and comfortable, but windproof and breathable, warm and light are objectively contradictory.
To this end, the R&D and design team of uniform equipment for the Winter Olympics has achieved a balance in the use of materials through scientific material selection and wearing combinations to meet the needs of all scenarios to the greatest extent. Winter Olympic uniform filling floc is a multi-layer structure of warm film, in the light of 1 minute, the spectral heat storage fiber temperature is 8 °C higher than the ordinary heat storage fiber, to meet the warm needs of cold environment.
In the Winter Olympics racing category, 0.01 seconds may determine the ownership of a medal. In order to minimize wind resistance and improve the speed of performers, tight clothing has been widely used in speed skating, alpine skiing, snowmobiling, sledding and other racing events.
Led by the Beijing Institute of Fashion, the racing tight competition suit, the surface of the clothing is a pit structure, which can effectively reduce the wind resistance to collect and test the basic performance of more than 150 kinds of fabrics, designed according to the physical characteristics of Chinese athletes, mainly involving short track speed skating, speed skating, alpine skiing and other racing projects, and the resistance reduction rate of many race suits developed is more than 10%.
In terms of color and collocation, the competition uniform chooses a more beautiful color to reflect the sense of design. In addition, through color analysis, pattern and other visual factors psychological evaluation research, combined with 3D simulation methods, the influence of visual factors of clothing on competitive evaluation is studied.