Science and technology to help the Winter Olympics, there are these universities “black technology”

2022-07-02 0 By

Infield “big Snowflake” 1/20 scale model wind tunnel test.3D printed torch ribbon provided by Beijing Jiaotong University.Terahertz remote sensing technology for Harbin Institute of Technology team.Beijing Institute of Technology for map technology winter Olympics key special research and development of L4 intelligent car.Feb 4, the start of spring, is the first day of spring.Glittering and translucent “big snowflakes” in the bird’s Nest bloom, the opening ceremony of the Winter Olympics as scheduled.The perfect combination of art and creativity cannot be separated from scientific verification, and there is a team responsible for the implementation of imagination.They are a group of wind drivers from Beijing Jiaotong University who understand, analyze and utilize wind.Since 2018, as part of the wind Tunnel lab research team, Beijing Jiaotong University professor Li Bo and his team members have been involved in the construction of winter Olympics venues and assisted training of athletes, including the opening ceremony of the Winter Olympics.The wind tunnel lab’s researchers work to “make the effects of the wind go away.”In July 2021, Li was told by the Beijing Organizing committee for the Winter Olympics that he needed to test the “Big Snowflake” ‘s ignition plan, in which the torch was suspended from the top of the stadium and tilted to the ground, inserted by a torchbearer, lifted and spun.With the provision of the 70th anniversary of the founding of the float, the founding of the party centennial celebration red arch and other important projects of wind advisory work.Li Bo realized that ensuring the ignition function of “big Snowflake” was the key, and immediately formed a team to design the solution.During this period, they repeated tests, the initial version of the “Big Snowflake” model is thin and light, unable to carry out the traditional building wind tunnel test model construction, the team revised for many times, finally using aluminum alloy 3D printing to make the test required high-fidelity scale model, the lifelike degree of the main torch design team greatly praised.After many tests, the team found that under the original plan, the “big snowflakes” would sway uncontrollably from side to side regardless of wind speed, making it impossible for torchbearers to insert the torch into them.Finally, the team proposed to adjust the original plan to “suspension + bracket” mode, to ensure the stability of the “big Snowflake”, to ensure the smooth ignition ceremony.The final torchbearers place the torch in the center of a snowflake during the opening ceremony of the Beijing Winter Olympic Games at the National Stadium on Sunday night.Among them, the 3D printing technology of Professor Su Yanqing’s team from the School of Materials science and Technology of Harbin Institute of Technology effectively helped the r&d and manufacturing of the zero-carbon torch for the Beijing Winter Olympics.Yan-qing su professor team for a variety of 3 d printing materials were tested and optimized, the internal structure of the torch to optimize the forming technology and burner 3 d printing process for the system validation and improvement, and finally the torch and its success was completely meet the requirements of hydrogen combustion system, guarantee the reliability of the Olympic flame burning.In addition, in order to ensure the appearance quality and combustion effect of the torch, in addition to the requirements of accurate size accuracy, it is also necessary to ensure that the density of the 3D printed torch is close to forging state, so as to meet the requirements of air tightness of the internal burner and polishing quality of the torch surface.Professor Su Yanqing’s team and Hart 3D Technology Team improved 3D printing equipment and developed a new printing process, which further improved the printing efficiency and the internal quality of the printing torch and met all aspects of the requirements of torch production.Alpine skiing, ski jumping, cross-country skiing…Every sport is inseparable from the changes in the weather, and accurate knowledge of wind direction, temperature, humidity and other information is crucial to guarantee the event.In cooperation with the National Satellite Meteorological Center, the Fengyun-3 meteorological satellite was used to obtain remote sensing data from the Beijing-Zhangjiakou region, providing accurate weather forecast information such as temperature, humidity, wind field and snowfall for the Winter Olympics venues.”In order to predict the weather of the Winter Olympics, we need to have enough weather data first, and we need to obtain massive amounts of information through the Microwave Imager (MWRI) carried by the Fengyun-3 weather satellite.”Team leader Hu Weidong introduced.Fengyun-3 meteorological satellite can observe the atmosphere all weather and all day long, and has realized the full spectrum detection of ultraviolet, visible, infrared and microwave in the detection band.Relying on the powerful Fengyun-3 meteorological satellite, the RESEARCH team of Beijing Institute of Technology can obtain global, all-weather, THREE-DIMENSIONAL, timely and accurate atmospheric parameters, surface parameters, Marine dynamic environmental parameters and other data.At the same time, the Beijing Institute of Technology team uses the microwave Imager (MWRI) carried by the microwave Terahertz remote sensing technology detection satellite to obtain important snow parameters such as snow depth and snow water equivalent.With the help of the Fengyun-3 weather satellite, the team created a “CT” of the atmosphere, so to speak, to get a comprehensive picture of the atmosphere.Different types of self-driving vehicles shuttle back and forth at the Shougang Demonstration Park for the Winter Olympic Games in Beijing.Different from ordinary vehicles, these vehicles have no driver to operate directly, but can skillfully carry out autonomous obstacle avoidance, path planning, intelligent scheduling and so on.This is led by Tsinghua University and Shougang Group, joint Baidu, Zhiwalker, Foton and other participating units to develop the all-weather multi-model L4 unmanned vehicle.As the Beijing municipal science and technology the games are special “all-weather vehicle automated driving technology development and function of shougang industrial park (games) of science and technology demonstration” project director, tsinghua university school of vehicles and vehicle dian-ge Yang professor since 2018, lead the team in view of the special working condition of the games are all-weather operation, around the “car” “road”, “cloud” “simulation” demonstration “,”It has developed seven types of unmanned vehicles, including Zhongba Public transport.The smart road of Shougang Industrial Park has been built, and the cloud control and scheduling platform of intelligent connected vehicles has been developed to realize real-time monitoring and remote scheduling of driverless vehicles.”Facing the complex and changeable cold weather of the Winter Olympics and the complicated road traffic scene of people and vehicles mixed in China, the team based on the multidisciplinary advantages of Tsinghua University, united with several units to carry out technical research and development in the process of autonomous driving, and realized the all-weather high-level autonomous driving technology and showed it to the world.”Yang Diange said.It is understood that the project research and development of a variety of models L4 self-driving vehicles, combined with shougang games park practical application demand, shougang games park and connection, no bus, and clean, no documents and Courier delivery, sharing about actual application scenarios, such as car for the 2022 Beijing Olympics autopilot model provides a strong technical support and guarantee.(Arranged by Ye Yuting, reporter of China Youth Daily)