Beijing Winter Olympics “Science and Technology 8 Questions”

In the context of the normalization of global epidemic prevention and control, “epidemic prevention” is the top priority of the Winter Olympics organizers.

The transmission methods of the new coronavirus (referred to as the new coronavirus) are mainly direct transmission, aerosol transmission and contact transmission. Aerosol transmission means that droplets are mixed in the air to form aerosols, which cause infection after inhalation.

In order to prevent the spread of the new coronavirus through aerosols, during the Winter Olympics, hotels and competition venues that receive athletes from various countries have installed aerosol new coronavirus monitoring systems. The system can collect new coronavirus particles in the air through a biological aerosol sampler, and put the virus particles into a nucleic acid analyzer, so as to realize automatic nucleic acid extraction, detection, and issue a test report. It only takes 30 minutes to complete the collection and highly sensitive detection of the new coronavirus. After the aerosol new coronavirus monitoring system is activated, it will comprehensively monitor whether the air of venues and hotels contains the new coronavirus.

In addition to the virus monitoring system, the air conditioners in the competition venues have also installed a pathogen air disinfection system, deployed disinfection robots, and used unmanned means to achieve automatic disinfection of Winter Olympic venues and hotels. In addition to traditional disinfection methods, there are also measures such as molecular sieve micro-nano catalytic filter material disinfection, ultraviolet disinfection, plasma disinfection, etc., which will be applied to the disinfection of circulating cooling water and water treatment systems, air disinfection and object surface disinfection.

A new type of temperature measurement technology, intelligent temperature measurement stickers, will be used for key monitoring groups such as chefs, cold chain logistics personnel, and security guards in the venues in the Yanqing competition area of ​​the Winter Olympics. This smart temperature measurement sticker is the world’s smallest medical-grade wearable continuous temperature measurement device with the most accurate temperature measurement. The intelligent temperature measurement sticker can carry out remote, real-time, and global temperature detection through the front-end intelligent thermometer and related management systems, which can accurately and quickly lock people with abnormal body temperature, improve management efficiency, and ensure epidemic prevention and control.

2. Can the athlete’s clothing be self-heating and the temperature can be controlled with a mobile phone?
Athletes who stay in a low temperature environment for a long time not only affect their athletic ability, but also may cause frostbite. In Chongli District, Zhangjiakou, extreme weather with temperatures as low as -40°C occurred, and many athletes who persisted in training suffered from frostbite of varying degrees. The researchers of the “Science and Technology Winter Olympics” research group conducted research and research, and a comprehensive thermal insulation system called “fortress” came into being. Wearing self-heating clothing, it can work continuously for more than 8 hours in an environment of -30°C, effectively reducing the heat loss of athletes during competition and training, so that athletes’ training is no longer affected by the weather.

According to different heating methods, heating clothing can be divided into electric heating clothing, solar heating clothing, chemical energy heating clothing, phase change material heating clothing and temperature adaptive heating clothing. However, whether it is to use solar thermal storage materials to absorb solar radiation, or to generate heat through chemical reactions or phase change materials to store energy for warmth, there are shortcomings such as small application scope and uncontrollable temperature. The self-heating equipment provided by researchers for Winter Olympic athletes uses electric heating technology. The research group integrated electric heating sheets in the thermal gloves and thermal masks, and connected them with the lithium battery through the controller. For example, the glove is equipped with a lithium battery with a capacity of 3300 mAh and a weight of about 100 grams. Once charged, it can continue to heat for nearly 5 hours. The battery is small in size and light in weight, and can be placed in the battery pocket of gloves and masks, even if athletes perform high-speed and vigorous exercise, it will not affect the comfort of wearing.

The most challenging technical difficulty in self-heating clothing is the development of materials for electric heating elements. The research group has achieved technological breakthroughs in flexible heating fabrics based on carbon paper, embroidered heating fabrics based on conductive yarns, and integrated heating garments based on silver-plated yarns. For example, the flexible heating fabric based on carbon paper is to encapsulate conductive carbon paper with a thickness of only 50 microns between two fabrics, which can improve the strength and washability of the heating fabric. By adjusting the shape and connection method of the carbon paper, different Power density for heating fabrics. Generally speaking, the higher the power density of the heating fabric, the stronger its heating ability and the faster the heating rate, which can better adjust the internal temperature of the garment.

The researchers also configured a heating temperature control module and a temperature control application (App) for the heating fabric, which can be integrated into the clothing, and supports manual button control and App intelligent control. Athletes can freely adjust the temperature of the heated clothing through the mobile app or manual button control to adapt to changes in temperature and body temperature.

In competitive competitions, it is often a small miss, a difference of a thousand miles, and a difference of one hundredth of a second can determine the outcome of the game. Compared to the Summer Olympics, many Winter Olympics events are faster. For example, the world record for men’s 500-meter speed skating is 34.03 seconds, or about 52.89 kilometers per hour; the world record for men’s 100-meter sprint is 9.58 seconds, or about 37.58 kilometers per hour. For faster events, competition clothing has a greater impact. The scientific research team took great pains to make the Winter Olympics “combat clothes” go a step further in “speeding up”.

In order to better achieve the goal of “tailoring clothes, reducing drag and speeding up”, the research and development team of the Winter Olympics “suits” has adopted new technologies such as digital acquisition of the human body. of 3D surfaces to generate fashion shapes. Using the latest patented technologies such as “Digital Collection Device for 3D Pattern of Clothing” and “Auxiliary Device for Body Scanning Attitude Stabilization”, the design of clothing pattern can be automatically generated to meet the needs of high-speed movement in competitions.

Speed ​​skaters generally wear tight-fitting one-piece sportswear. The surface of the clothing looks smooth, but in fact, a textured dimpled fabric is used, which can effectively reduce resistance. The R&D team has collected and tested the basic properties of more than 150 fabrics around the world, but failed to find the most satisfactory fabrics. In the end, the R&D team independently designed the drag reduction structure and developed the latest drag reduction fabrics. Each piece of sportswear is tailor-made according to the athlete’s body, not only to fit the Chinese athlete’s body, but also to the final design according to their technical and tactical characteristics. The R&D team also used fluid dynamics simulation technology to build a three-dimensional aerodynamic model for comprehensive wind tunnel verification. Compared with the current winter sports uniforms, the drag reduction rate of the new speed skating uniforms exceeds 10%, gradually realizing “best posture + moderate compression + best drag reduction structure”.

In short track speed skating competitions, the competition is fierce, and it is not uncommon for athletes to fall in collisions and get scratched by skates. In addition to the functions of muscle compression and drag reduction, the short track speed skating clothing for the Winter Olympics also uses a new type of high-bullet anti-cutting fabric. The R&D team uses domestic patented technology to upgrade the clothing material from one-way anti-cut to two-way anti-cut, which not only has excellent elasticity, but also improves the anti-cut performance by nearly 30%. Under the protection of high-bullet cut-resistant competition suits, athletes can be more confident in competitions and go all out to create better results.

In alpine skiing competitions, athletes can reach speeds of up to 130 kilometers per hour, even if there is no wind, they are walking through strong winds. In high-speed sports, athletes also need to complete difficult turns, crossing flag gates and other actions. The soft tissues of shoulders, thighs and ribs are easily injured, so clothing is required to have better protective functions. The R&D team adopts a new type of columnar array shock-resistant structure and a new type of energy-absorbing and shock-absorbing material to develop pads, guards, back clips and other protective gear to reduce the pain of athletes when they cross the flag gate and the physical injury caused by accidents.

In alpine skiing competitions, changes in weather and natural environment such as temperature and wind speed on the day will affect the performance of athletes. According to the regulations, each team has only one day to test on the track before the official competition. The time is too short, and it is difficult for athletes to quickly familiarize themselves with the field of play, and it is difficult to perform at the highest level in an unfamiliar environment.

In order to solve this problem, the scientific research team integrates the virtual reality (VR) skiing experience system and the dynamic environmental parameter monitoring system through “robot technology + virtual reality technology + Internet of things technology + artificial intelligence technology”. Put on the glasses, pick up the handle, keep your eyes on the screen, swing your arms quickly…you can enter the ski experience system. The natural landscape in the picture and the sound of wind and snow in the ears make people feel as if they are in a real ski resort in an instant. The system can collect the natural environment data of the ski field in real time, and input the data into the ski experience system, establish a multi-source real-time collection and display system of information, and use VR to reconstruct the ski scene information and display it. Athletes can use the system to carry out simulation training in advance, experience the geographical features of the ski field, experience the track conditions, and improve the level of on-site performance. The coaching team can use the system to correct athletes’ training movements and improve training efficiency.

The system can also be used for ski training for athletes in spring, summer and autumn and indoor simulated skiing experience for ski lovers. Beginners who are interested in skiing can use this system to experience skiing events such as alpine skiing and freestyle skiing. For the sub-healthy, the disabled and the elderly, the R&D team has also developed a wearable exoskeleton robot device to help skiers who are prone to muscle fatigue or experience long-term experience.

Ice hockey is the most intense competition in the collective ball games on the same field. The offense and defense are often switched between. Players have to complete the overloaded fierce confrontation within a few minutes, and injuries sometimes occur during the confrontation. During such a fierce competition, it is far from enough to have a doctor and a first aid kit on site.

The ice hockey rink of the Beijing Winter Olympics is equipped with a special large van, which is the result of a special project of the “Science and Technology Winter Olympics” – the Winter Olympics Frostbite and Maxillofacial Trauma Mobile Intelligent Diagnosis and Treatment Platform (“Intelligent” for short). medical car”). The “intelligent diagnosis and treatment vehicle” consists of a consultation room and a CT room, and is equipped with a CT machine, a frostbite facial data acquisition system, an ECG monitor, a blood analyzer, an intelligent cardiopulmonary resuscitation device, a portable ventilator and other equipment to ensure that the injured can receive prompt medical attention. , efficient medical care and emergency treatment. The network platform interface and artificial intelligence software are installed in the “smart diagnosis and treatment vehicle”, which can effectively improve the efficiency of on-site diagnosis and treatment of frostbite and maxillofacial trauma, realize a scientific and rapid on-site diagnosis and treatment process, and efficiently complete the information connection with the hospital, allowing referrals The process runs smoothly.

In the game, the injuries suffered by ice hockey players are mainly maxillofacial trauma. Athletes with maxillofacial trauma are often accompanied by airway damage, which is where portable ventilators come in handy. Although this kind of ventilator is small, its performance is close to that of the intensive care unit, which can prevent the injured from harming the body due to lack of oxygen. When an athlete suffers from trauma such as skin damage, the blood analyzer of the “smart diagnosis and treatment vehicle” can complete the detection of routine blood biochemistry and blood gas analysis, and confirm the physical changes of the athlete after the injury.

CT has a certain degree of radiation. How to reduce the harm of radiation to medical staff and wounded? It turned out that the equipment in the “smart diagnosis and treatment vehicle” is a cone beam CT, which is lighter and has lower radiation intensity, and radiation protection facilities are also installed on the walls of the vehicle. When the CT is running at full capacity, not only the people outside the car are safe, but the people inside the car are also safe as long as they are outside the CT room door.

In order to ensure the rapid transmission of medical information, medical staff at the competition site must wear a remote diagnosis and treatment recorder, and there is a 5G signal card in the recorder. When the medical staff enters the rescue, they can use the device to record the images and sounds of the diagnosis and treatment process in real time. The diagnosis and treatment information is transmitted to the center console through the 5G network. After receiving the diagnosis information of the injured by the doctor at the game site, the duty personnel at the center console will contact the members of the expert database as soon as possible. Prepare for rescue.

For athletes, training without fatigue is ineffective in improving competition performance, but the accumulation of fatigue caused by long-term, high-load training may lead to injuries and also affect training results. In order to solve the “fatigue dilemma” in training, the Winter Olympics technology research and development team designed and manufactured a rapid fatigue elimination system for athletes in winter sports (referred to as the fatigue rapid elimination system).

From the outside, the fatigue quick elimination system is a white round cabin with soft lines and a height close to that of an ordinary adult. To enter the cabin, you must bend down and bow your head. There is a bench in the cabin, as well as a mini table and monitoring instruments. The system consists of micro-pressure oxygen supplementation equipment and transcranial pulse electrical stimulator. The air pressure in the cabin is 1.3 standard atmospheric pressure, which can promote blood circulation and increase the amount of oxygen absorbed by the human body, which can help athletes shorten recovery time and improve fatigue recovery effect. Improve athletic performance. Transcranial pulse electrical stimulator can stimulate brain nerves, peripheral nerves and muscles, which is beneficial to improve the state of the brain and nervous system of athletes.

After high-intensity training or competition, with the help of the fatigue quick elimination system, exhausted athletes can recover their physical strength and mental state in just 50 minutes.

The Zhangjiakou Winter Olympics venue area is about 2 kilometers above sea level, which is the area with the highest altitude among the three competition areas of the Winter Olympics. In February and March every year, the minimum temperature in the high-altitude areas of Zhangjiakou may drop below -30°C. How to ensure the smooth network in the extreme environment of high mountains, low temperature, freezing and strong wind? How to ensure that the 5G mobile network does not slow down?

According to the local environment, the communication technology team of the Winter Olympics provided special communication for the relevant areas of the Winter Olympics and strengthened the construction of the mobile network. The Prince City area where Zhangjiakou Olympic Village is located has achieved complete coverage of 3G/4G/5G networks. Using 3.5G broadband technology on the 5G network, the download rate can reach 1.7Gbps, which is the fastest download speed in the domestic communication network.

In competition venues covering high-speed 5G networks, multi-dimensional viewing experience and VR live broadcast technology can make a big difference. For example, in the Wukesong Sports Center in Beijing, 60 cameras using 5G+8K technology are hoisted at 180 degrees below the ring screen in the competition venue. After the competition starts, the competition can be fully photographed. On-site audiences only need to scan the QR code and download the app to experience the 180-degree free viewing angle and immersive live broadcast, and watch the game moments of their own choice in real time.

In the past, the live broadcast of sports events that everyone watched was a signal synthesized by the director of the multi-channel camera on the OB van. The picture was dominated by the director, and the spectators could not choose “what to watch” independently. Multi-dimensional game viewing experience and VR live broadcast technology allow viewers to realize free viewing angle and VR live broadcast viewing through mobile phones, VR helmets and other devices, realize user-dependent interactive game viewing experience, and change the traditional live broadcast method of fixed viewing angle and passive viewing of the game. For the first time, this technology realizes the generation and transmission of interactive and continuous free-view video for users through 3D reconstruction and rendering technology. In the future, character tracking technology will be added, and the audience can choose their favorite athlete and track the athlete’s picture, which is a feast for the eyes.

In some news programs, a sign language announcer will appear on the screen to serve the hearing-impaired, which well meets the needs of the hearing-impaired to obtain news information. However, it is obviously too costly to have sign language announcers in all video programs. At the Winter Olympics, a sign language broadcast digital person will appear next to the newscaster. Sign language broadcast The digital people can automatically generate sign language gestures in real time according to the voice they hear, helping the hearing-impaired to easily understand news information. How can sign language broadcast digital people understand the news? It turned out that the researchers used the most advanced artificial intelligence technology. The sign language broadcast digital human uses the “Wu Dao 2.0” super-large-scale pre-training model as the underlying core technology, which can realize intelligent sign language generation, achieve the effect of information barrier-free, so that the hearing-impaired can easily and efficiently obtain competition information and experience the Winter Olympics It will be wonderful.

A robot that looks like a dog but has six legs may be the most “cute” robot at the Winter Olympics. When the “six-legged puppy” first appeared in the Winter Olympics Science and Technology Pavilion, many curious children were excitedly lying on the ground to communicate and play with it. In fact, the simple and cute “six-legged puppy” is not a toy robot, it will shoulder heavy responsibilities at the Winter Olympics. The name of “Six-legged Puppy” is a six-legged robot that guides the blind. It is a robot developed to meet the needs of visually impaired people to participate in events. It can provide services for visually impaired people in the Winter Olympics and Winter Paralympics guide. The blind guide hexapod robot can obtain destination information through voice, control device input, etc., conduct path planning through precise navigation and positioning, and use vision and force sense fusion to perform walking stability control, so as to guide the visually impaired to travel smoothly.