"At the closing ceremony of PyeongChang Winter Olympics on February 25th, 218, Zhang Yimou, the general director of Beijing Eight Minutes, said that Beijing's eight minutes of creativity lies in Xinhe Technology, and it takes eight minutes to show China's achievements and great country's self-confidence, and to show China's confidence in hosting the 222 Winter Olympics and China people's enthusiasm for welcoming friends from all over the world to China."
On the stage of "Eight Minutes in Beijing", 24 large screens presented a beautiful image of China in the new era, which became a highlight of the performance. These almost transparent screens have a nice name: "Ice Screen". This innovative design, which originated from China, can realize transparent image display, and the effect is more transparent and smart. It has won many domestic and international invention patents. Huang Qingsheng, director of the Beijing Cultural Performance Project, the head of the "Ice Screen" R&D team, introduced.
"Because its transparent screen has a transparent effect, people call it catchy, so the name of our screen comes from this. This ice screen used in the Winter Olympics is specially customized, because in the past, we used to be a standard module of one meter times 5. If it is installed as one meter, it will reach three meters in the middle, and there will be two power supplies in the middle. For our Winter Olympics project, let's make this custom-made splicing of the left and right modules with a scale of 5×5, and the transparent column used in the middle will be seen from a distance when it is made. It is a seamless piece. We were at MINUS 3 degrees Celsius in the cold storage, and then it was adjusted to MINUS 2 degrees. The robot made us 24 pieces, and then 6 pieces were prepared for the screen. "
There are 24 flexible mobile robots carrying the "ice screen" out of gorgeous dance steps. They not only complete their own movements, but also perform in conjunction with live actors and ground projection, which also realizes the upgrading and innovation in the technical field. According to Zhang lei, the head of the robot R&D team, this time they mainly achieved two breakthroughs in technology:
"We actually used laser navigation, and we used two-dimensional leader navigation technology, and the navigation distance is very long, which is different from all previous projects. Actors will be constantly interspersed in the scene, and we robots will be constantly moving, so they often have some shelter. Then we have to overcome this difficulty, so that our algorithm can relocate quickly under any circumstances, whether it is blocked or not, or sometimes the target is lost. This is a breakthrough. The robot walks completely according to the compiled route and plan, and people don't operate it at all. "
It is worth mentioning that in the wind tunnel laboratory of China Institute of Building Research, the equipment has been tested for its wind-carrying performance, mainly to test whether the equipment can work normally in strong wind and whether there will be trajectory deviation in normal wind. The working team designed forty or fifty kinds of test schemes, adjusted the wind speed up and down based on the five or six winds, tested the running track and working conditions of the equipment under different wind speeds, and continued to optimize the design and improve the scheme according to the test results.
In order to ensure the smooth performance, the creative team has visited Pyeongchang, South Korea for many times to inspect the local natural conditions and live performance conditions. It is understood that on the day of the closing ceremony, the average temperature over the years was MINUS 1 degrees, and the wind force was about 5. The cold and windy is no small challenge for the whole performance team. In order to do the actor's cold-proof and warm-keeping work well, the main creative team adopted graphene intelligent heating clothing to ensure the actor's graceful movements and prevent frostbite.