On the 25th, the "8 minutes of Beijing" at the closing ceremony of the PyeongChang Winter Olympics not only conveyed the Chinese people's welcoming welcome to friends all over the world, but also brought together the "Chinese wisdom".
How to build a panda messenger, "ice screen" and robot dance steps?During the performance, the two giant pandas that are embarrassing are impressive. They are not only the messengers of culture, but also the inheritance of China's “national treasure†craft. It is understood that the panda props are from the hands of craftsmen at the Nanchong Grand Puppet Theatre in Sichuan Province. They have always been committed to the protection and inheritance of this Chinese national intangible cultural heritage.
The big puppet must be worn by people to perform, so the weight needs to be less than 30 pounds. According to Tang Guoliang, the president of the Sichuan Nanchong Grand Puppet Theatre, this requirement alone made their team smashed several nights.
In order to achieve the expected results, the production team has tried a variety of materials such as paper vine, natural white vine, bamboo raft, aluminum alloy wire, carbon fiber strip, PVC artificial rattan, etc., and conducted hundreds of tests before finalizing. The combination of aluminum alloy pipe and carbon fiber strip is combined with the manufacturing process of the LED lamp.
The final version of the panda props, 2 meters high, but only about 20 pounds of weight, lighter than the initial version of a few pounds, even Tang Guoliang can not help but feel, "I did not expect everyone to work together to make such a high-tech Large props that are light and at the same time can achieve the effect of the show."
On the stage, 24 screens show the beautiful image of China in the new era. These near-transparent screens have a nice name: "ice screen." This innovative design from China can achieve transparent image display, the effect is more transparent and more flexible, and has won many domestic and international invention patents.
Huang Qingsheng, head of the “Bingping†R&D team and director of Beijing Literary Performance Project of Shenzhen Yipin Broadcasting and Television Co., Ltd., said that in order to participate in the 8-minute performance, the team not only produced products with higher specifications and better technology, but also realized simultaneously. Process upgrades. "The current ice screen technology is at the world's leading level. This time we made a three-meter screen and there is no beam in the middle. This process is currently the first in the world." Huang Qingsheng said.
The "ice screen" is a dynamic mobile robot with 24 movements. They not only complete their own movements, but also perform live performances with live actors and ground projections. They also achieve upgrades and innovations in the technical field.
In the view of Zhang Lei, the head of the robot R&D team and the president of the mobile robot division of Shenyang Xinsong Robot Automation Co., Ltd., they have achieved two breakthroughs: first, robot navigation is more precise. “There are frequent shuttle interactions between actors and robots. There are many lights in the performance venue, which requires the robot to look far and see clearly.†Secondly, compared to the commonly used industrial robots, the “actor†robot The movements are more complex and flexible, including completing the rotation, swinging, and acting with the actors to make some fancy moves.
“These new technical requirements have also challenged the entire R&D team, requiring us to continually improve the algorithm while designing the program.†Zhang Lei said that the team has only two months from the time of determining the participation to the rehearsal. Working around the clock, I finally customized the robots that can participate in the performance.
Antifreeze test, virtual visual protection performance wonderfulIn order to ensure the smooth progress of the performance, the main team has visited Pyeongchang, Korea several times to inspect the local natural conditions and the performance conditions on the spot. It is reported that on the day of the closing ceremony, the average annual temperature is minus 10 degrees and the wind is about 5 degrees. Extremely cold and windy, it is no small challenge for the entire performance team.
In order to do a good job of the actor's cold and warmth, the main creative team used graphene intelligent heating clothing to ensure the actors' movements and prevent frostbite.
Graphene is a super-new nano material with ultra-high strength and ultra-high thermal conductivity, which has been praised as “the king of new materials†by the industry. Using the characteristics of graphene, Chinese researchers have developed ultra-thin and transparent graphene electrothermal thin film technology for the manufacture of intelligent equipment, and applied for patent protection in foreign countries.
“The actor’s clothing requirements are light and thin, allowing them to flexibly perform their actions. At the same time, whether it is the rehearsal site or the Pyeongchang closing ceremony, the weather is very cold, and the graphene clothing can have a good heat preservation effect.†Graphene team The person in charge, Shenzhen Liwang New Materials Technology Co., Ltd. Li Yueqiu said that according to environmental requirements, clothing can also be adjusted accordingly. “The initial design requirement for us was to continue to heat for 8 minutes in an environment of minus 5 degrees. Later, considering the factors such as the waiting field, we adjusted to a temperature of minus 20 degrees and heat for 4 hours.â€
In the cold weather conditions, in addition to the actor, there are all the performance equipment on site. In order to make the main body of the show "ice screen" and mobile robots run smoothly in Pyeongchang, the main creative team deliberately tested the equipment against cold and wind, ensuring its stability in low temperature and high wind conditions.
Throughout the rehearsal process, two sets of visual simulation systems have been acting as directors' "eyes" and "batons." This is the “OpenGL Performance Aided Training System†and “Beijing 8-minute Cultural Performance Preview System†designed by the virtual visual team formed by Beijing Institute of Technology and Beijing Film Academy. The two systems can simulate the literary performance process according to the director's creative plan, and display the actor's trajectory, position information, formation change, movement speed, etc. in a variety of forms such as visual interface and drawings, videos, etc., to help the director to control, Make decisions and improve the performance plan.
"The two systems are equivalent to let the director see the live monitor and live broadcast effects at the same time. The director can observe the formation status of the actors and props in real time in the system. If adjustments are needed, feedback can be made in time." Beijing Film Academy's future image is highly refined. Wang Chunshui, deputy director of the Center for Research in the Center for Innovation, said that the system can generate his own movement trajectory and rhythm for each person involved in the performance. "When you don't have to think about the person next to you, you can know what time you should do." This will greatly improve the efficiency of rehearsal."
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