"Beijing Daily" interviewed Liu Li, the most beautiful science and technology worker in Beijing: Science and Technology Embroidered Mother

Fiber -fiber hand, Zhazha 杼. A needle, a cloth, a pair of clever hands, a knitting machine ... Ancient embroidered mother -in -law pierced the needle, tracing dragon embroidery phoenix, gorgeous and exquisite embroidered clothes jumped. However, the ancients may not be able to imagine that technology and life are deeply integrated, and clothing can still be "wisdom".

At the Beijing 2022 Winter Olympics, China Bingxue Jian'er competed for gold and won the silver, with bright results. Behind them, a group of technology workers worked silently in the laboratory to inject the power of science and technology for each difficulty medal. Liu Li, a professor at the Beijing Institute of Clothing and the director of the National Winter Sports Clothing and Equipment R & D Center, is one of them. She led the team for a long time to develop the "science and technology jersey". Culture, Chinese wisdom.

Not long ago, during the selection activities organized by the Propaganda Department of the Beijing Municipal Party Committee, the Municipal Science and Technology Association and other departments, Liu Li won the title of "Most Beautiful Science and Technology Worker" in Beijing in 2022.

It is 0.01 seconds with the resistance "strong"

"In the racing competition project, 0.01 seconds may decide the ownership of a medal, and the costume of the equipment is likely to become the decisive factor in this slot."

At present, Liu Li's team is "competing" with this 0.01 second -to participate in the National Swimming Team to participate in the 2024 Paris Olympic Games R & D Swimsuit with a leading international level. It is currently collecting data and formulating plans. "Aiming at the characteristics of various small competitions in swimming, combined with ergonomic and fluid mechanical knowledge, we are carried out research on liquidity and resistance to form ergonomic design and high -performance swimwear streamlined resistance structure design in accordance with the characteristics of Chinese athletes. Comprehensive research and evaluation system of swimming competition uniforms. "

Simply put, it is to develop a tourist swimsuit suitable for the Chinese team to swim faster. "In fact, the national swimming team's competition uniforms were ordered from abroad, and one it would cost nearly 10,000 yuan. At the same time, due to strict requirements on surface elasticity and persistence, a competition clothing often worn and take off and take off. Ten times will be 'retirement', the cost is high. "

Liu Li said while opening a folder in the computer desktop. The relevant regulations of the International Swimming Federation and the research and development plan were clearly visible. "The dense text may be boring, but it really wants to make a good clothing. Research, 'Bite the word chewing'. "For example, the International Swimming Federation's regulations on the tournament of the competition include: the swimsuit must be textile materials such as woven, knitting, weaving, etc., and the permeability of water transmission must reach not less than 80 liters per square meter per second. It does not exceed 0.5 Newton. To this end, Liu Li's team locks the swimsuit fabrics as ultra -hydrophobic fabrics, anti -pollution -resistant and seepage, and stable resistance. "This micro -nano -nano structure is smaller than the smallest unit of water. The water droplets are rolled on lotus leaves, and the sliding friction is converted into rolling friction. The research and development plan is being formulated, and the prototype of domestic tourism swimsuits is gradually improving.

In fact, Liu Li's team is already very experienced with the "effort" of resistance.

Since 2019, Liu Li's team has developed high -performance training and competition uniforms for the Chinese short track speed skating team, the Chinese figure skating team, and the Chinese free ski air skills team. Talking about the entire research and development process, Liu Li bluntly said that the resistance to the resistance is the focus and difficulties that run through it.

"We divide this type of clothing into two types: speed type and skills. The research and development ideas are not the same. One focuses on 'fast', and one is settled in 'beauty'." Liu Li for example, picked gold at the Beijing Winter Olympics. The short track speed skating and speed skating of silver projects are competing with "fast", and the key is to reduce the resistance -high -speed ice gliding, which requires the air resistance of about 10 high -level winds. Therefore, the design speed race service must be started from the fabric and tailoring to improve its resistance as much as possible.

CFD numerical simulation is performed according to specific items is the basis for exploring resistance design. What is CFD value? "It is to calculate fluid dynamics, obtain the rules of the athlete's surface speed distribution, pressure distribution, and different posture of different postures, so as to choose suitable fabrics." Liu Li, who was born in Scholar Science, did not bother with dense data, knowing that he passed the passing. The valid data obtained by complex computing is an important support for scientific research and the only way for research and development.

On Liu Li's desk, dozens of different structures and fabrics are placed layer by layer, and some are smooth and some are uneven. "We started from weaving fabrics, and also tried various methods such as rubber printing, 3D printing, and laser micro -engraving to make compound resistance." Liu Li said that the hat of the speed skating competition uniform, the team compared 21 21 There are more than 10 styles of the fabric and the legs.

Only the data support is not enough. In the end, which fabric is selected, it needs to be repeated and tightly experimental arguments. To this end, the team used the wind tunnel laboratory. In the training base of athletes located in the suburbs of Beijing, there is an empty and spacious "wind paradise" -the wind of different speed levels, simulation of the movement of the human body and objects, and analyzing the air resistance received during exercise. "During the development of air tunnel tests in the development of aircraft, missiles, rockets, architecture, etc., we created a precedent and used it to prepare and develop sports events for the first time."

In order to find the best resistance fabric, Liu Li's team brought all the alternative fabrics and designs of the competition uniform into the wind tunnel laboratory and "blow off the hair" in advance -the athlete model that needs to be evaluated in 3D printing On the last, "Athlete's training task is heavy, and most of our time uses models instead of it to test." Liu Li explained that when the wind tunnel was running, the team used a set of ice and snow project wind tunnel to assist training systems to collect wind speeds in different parts in real time. Data and other data of wind resistance analyze and evaluate the resistance of clothing. The team also pondered a trick and got rid of the limitations of only model analysis. "This is a test suit made by the team deliberately for wind tunnels, so that she can see the direction of the wind with the naked eye, and truly feel the form of the wind." Liu Li pulled out a pure white dress from the hanger, It is covered with catkins -like hairs. "Each wool is hand -stitched. When the wind blows, the hair flutters in different attitudes, and the wind speed, wind resistance, and wind direction are clear at a glance." Liu Li said that the team was developing and developing like this. Improved more than 1,000 hours in the wind tunnel laboratory.

Recalling the experiments in the wind tunnel, Liu Li bluntly stated that this is a dual test of the brain and physical strength of scientific researchers. The wind tunnel will produce wind speeds from a few meters to dozens of meters per second. of."

During the preparation of the race, athletes often came to wind tunnel training. Liu Li team could only test in the rest of the athletes or nights. In order not to waste too much time on the laboratory, the team members often eat and live in the wind cave laboratory. "Everyone bought instant noodles, dried tofu, and self -heating hot pot. It is a week of drying in it. When the test of the first stage is done, the data is taken out of the laboratory for analysis."

In the more than 1,000 hours of "strong" with the wind, the team repeatedly modified and adjusted the resistance of the competition uniform. It seems difficult to achieve at the time. Now, the maximum resistance of speed skating and short track speed skating projects exceeds 10%, which can be said to have completed the task! "Liu Li said, his face was filled with gratitude to the gratifying face. Smile.

Liu Li discussed with the R & D team to discuss sample design

Liu Li team designed and developed figure skating competition uniforms

Speed ​​skating competition service in the wind tunnel laboratory test

Inject "combat power" to clothing

The childhood in Liu Li's memory was full of "crunch" from her mother's foot on the sewing machine. "My mother likes to do it. The clothes and quilts I wore when I was young were made by her own hands." The mother's ears were dazzling, making Liu Li's longing for the clothing. "I love to visit the mall and also love to watch fashion magazines. The lines and colors flowing on each piece of clothing always attract my eyes." Liu Li said with a smile.

After going to college, the beautiful dressed girl first came into contact with clothing design and engineering, and her awareness of clothing has been upgraded from daily needs to functional manufacturing. A full 6 -year doctoral career also gave her a clearer positioning in the future research direction -she decided to deeply cultivate three major areas of ergonomics, functional clothing, and smart clothing, and set a goal: "'Wisdom' is China to make China in China The future of sportswear will continue in this direction. "

Look at the design of clothing with the thinking of science students, and use ergonomic research methods to produce functional protection clothes and equipment. Liu Li has been silently moving forward on this road: design aircraft carrier special protective clothing, army aviation flight suit, improve the army anti -virus clothing, One -time nuclear protection clothing ... "I always think that I am producing" combat effectiveness' clothing. "Liu Li said.

For more than ten years, he worked silently and fruity. Looking back at the past, Liu Li bluntly said that she was most proud of her, and it was also the "work" with the most thoughtful thoughts, which was born in the Winter Olympics.

In 2019, Liu Li's team was approved by the Ministry of Science and Technology's national key research and development plan "Science and Technology Winter Olympics" key special project- "Winter Sports and Training Competition High -performance Clothing Research and Development Key Technology" project.然而在立项初期，我国冬季运动竞技比赛服的研发几乎是一张白纸——作为一个冰雪运动发展历史相对较短的国家，我国冬季运动专业装备在很长一段时间里大多依赖进口，缺乏高The independent research and development system of technology and cutting -edge competitions. "The previous competition clothing was either sponsored directly by foreign brands or bought it by myself."

Start from scratch. The Liu Li team started with the 2002 Salt Lake City Winter Olympics, and consulted the competition uniforms of the previous Winter Olympics and the corresponding project players of the previous Winter Olympics and World Cups, drawn the structural diagram, find out the details of the details, and compare the results of clothing and competition one by one. They also collected a lot of clothing worn by athletes, testing and analyzing in the laboratory to find the mystery. "In which year, we won the medals, and we will focus on the clothing wearing the clothing wearing clothing, and strive for the advantages of all countries' clothing‘ one net ”."

Knowing each other more confidant. In order to develop a game suit suitable for the Chinese team in the shortest time, Liu Li's team ran all over 10 countries in the country and completed the 3D body type of more than 400 athletes of 22 sports teams. Some bases have remote locations and inconvenient transportation. Liu Li drove to and from hundreds of kilometers by car, just to understand the actual needs and trial experience of the athletes for the athletes.

During the epidemic, large scanners could not be transported to various bases. The team members used handheld scanners to complete the 3D body measurement of hundreds of athletes. "When scanning, you need to hold a scanner in one hand, hold a tablet with one hand, monitor while scanning, and move around the athletes." Liu Li said that a handheld scanner weighs four or five kg, and most of the teams are mostly in the team. They are all young girls. I haven't done much physical work since childhood. "Everyone helps each other and encourages each other, and has become a full -fledged female man." The garment trial, Liu Li is accustomed to himself. "Benbo all day, maybe you can only get a athlete's measurement data or try on feedback, which is also worth it." Because she always believed that she had to see the trial effect, touch the clothing texture, and communicate with the athlete personally in person. In order to improve the plan, you can really rest assured. "My colleague said that I was worried about it. I felt very good, related to the honor of the country, and I couldn't be wrong in one step."

The trust and affirmation of athletes also injected a dose of heart injection into the R & D team. On September 26, 2021, the Chinese speed skating team athlete Gao Tingyu broke his personal record with a 33 second 83 score in the "China Cup" speed skating elite league men's 500m competition. The competition he wore came from Liu Li's team.

After the game, Liu Li received the video of the game sent by Gao Tingyu. She recognized it at a glance that Gao Tingyu's black and white competition uniforms were the seventh edition of the team after many adjustments. "We are surprised and surprised to see that he is wearing a sample -on field without any artistic modification, which shows that he has enough trust in the team's design."

Story of Chinese stories one by one

In recent years, from the sports brand Li Ning incorporated Chinese traditional cultural elements into the design of clothing, to the Forbidden City, the National Museum, etc. have launched co -branded clothing peripherals, the domestic clothing industry has set off a "Chinese style", and this beautiful and elegant design style has gradually gradually gradually gradually gradually gradually gradually gradually gradually gradually become. On the world stage.

In the gallery skating field, the Chinese team's competition has become more and more focused on the audience's attention. Shen Xue and Zhao Hongbo's "Yellow River", Jin Boyang's "Dawn", Wang Shizhen and Liu Xinyu's "Only Green and Green", Peng Cheng and Jin Yang's "Night Banquet" ... all of these games have a refreshing feeling to the audience. Behind this is countless Chinese clothing designers' efforts day and night, including Liu Li's team.

In fact, for a long time, high -level athletes in Chinese -like skating are cooperated with foreign designers. Domestic skating competition uniforms rarely appear on the international field. "Of course not because we are not designed well, but there is no professional team to dive to study this field." Liu Li was the first person to eat crabs.

At the end of 2018, Liu Li's team was "dangerous" and designed contests for Han Cong and Sui Wenjing, who was about to participate in the 2019 Filter Skating World Championships. "The task came suddenly. At that time, I didn't know much about the skids. I just felt that the sport was beautiful, so I took the courage to take over." And how to organize hard technology and soft design in a thin and light clothing, it is a placement. A major problem in front of the team.

The suggestion of a Canadian choreography coach made Liu Li remember -the clothes were enhanced and could not be suppressed. "Some athletes have a clear goal. They go to the gold medal. They are strong in their aura, so the competition uniforms cannot be too gorgeous and the athlete's light."

Based on the principle of ca n’t make a noise, Liu Li slowly understands the expression of "properly" and does subtraction in design. Listen to music, communicate, design drawings, make naked clothes, diamond decorations, trial on land, trial on ice, repeated modifications ... Tailoring for flower skaters, more detailed considerations. In ten months, the team repeatedly worn out more than 50 sample clothes, innovating into the traditional Chinese elements and Soviet embroidery techniques. In the end, this competition uniform was rated by countless netizens as "beautiful".

Liu Li gently stroked a delicate Su Xiu pattern on the skid -like clothes and told reporters: "In the live TV lens, the audience may think that the color is printed and dye. They are embroidered with one stitch and one line. "The embroidered girls spent about 250 hours, which reduced the needle distance to one -fifth of the normal, which showed a richer effect than the printing and dyeing process.

The abnormally exquisite Su Xiu pattern when watching at close range. Because the distance is far away in the live broadcast, it is often not easy to be noticed by the audience. Is such a time -consuming and laborious design worth it? "Athletes can see." Liu Li said without hesitation. "The athlete knows that the team has paid a lot of hard work. It is designed with the best things, and their hearts will be more calm and more secure, so as to give full play to more Good level. "

Liu Li also revealed that in addition to "beauty", the figure skating competition uniform must also be firm and flexible to meet the needs of athletes to make big moves such as jumping and tumbling. For example, some fabrics of the arm should facilitate the athletes to lift their arms, but they cannot have wrinkles when the arm falls. The total weight of the clothing must also be accurately controlled. Too heavy will affect the athletes to do high difficult movements.

Liu Li showed reporters a performance suit that two -person slide transporter Peng Cheng had worn. There were more than 8,000 diamonds on it. It looks particularly dazzling, but this also brings stricter challenges to the weight of clothing. "We have done countless experiments, and found that the clothing of women's singles players is always important to keep between 260 grams and 300 grams in order to achieve a balance between beauty and lightness." When athletes rotate and jump, thin clothing must ensure that no decorations fall into it. ; Two people also have action such as throwing jumps, which requires that the waist part of the female athletes cannot cut their hands and must be firm. To this end, the team canceled the auxiliary of conventional clothing such as zipper, buttons, and repeatedly reinforced diamond decoration with thin lines. "Once it is monitored to a drop -off, it will be deducted. You can decide the victory field at zero. The clothing must not drag the legs for athletes."

Half silk and half a strand, material resources are difficult. At present, Liu Li's team has created more than a thousand sets of design plans for the Chinese Flower Slide Team, making hundreds of sets and performance clothes, helping athletes to win prizes in many competitions.

As a leader in the R & D team, Liu Li has always practiced the concept of innovation; as a gardener for teaching and educating people, she also respects the students' ideas and creates a loose learning atmosphere for students as much as possible. "In R & D projects, my students have been participating in in -depth." Liu Li said that they are small assistants and are partners of fighting side by side.

Recently, Liu Li's team once again received an invitation from the Olympic -the National Swimming Team participated in the development of "shirts" on the development of the Paris Olympics in the 2024 Paris Olympics. From the study of ice to pondering, this team full of combat power set off again and again.

Source: Beijing Daily (Intern reporter: He Rui)

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