According to Xinhua reported:The suspension in the "celestial globe" in the Golden Key slowly rotating, the guests start to open the LED screen on the door of the Shanghai World Expo - new and unique ideas, to our ancient civilization and modern technology the perfect combination of wonderful display of Chinese and foreign guests in front of the 2010 Shanghai World Expo Park opening ceremony of the wonderful highlights.
Shanghai World Expo Park opening ceremony of this "golden key", embodies the advanced level of modern science and technology. "Golden Key" developer of the Chinese University of Science and Technology Engineering Science Associate Dean Professor Kong Fanrang, said, "Golden Key" in the air stability of suspension and automatic rotation, the secret is to use the adaptive control of magnetic levitation technology, which is the world's most advanced magnetic levitation rail, the core technology of magnetic bearings.
It turned out that the 60-centimeter-long "golden key" which is empty, the key is installed on top of a NdFeB magnetic, this is a special made with rare earth magnets, has a powerful magnetic force. In the "Golden Key" at the top, in the "celestial globe" within a fixed circle, then hide the two sets of advanced micro-magnetic control system.
A system control "golden key" of the suspension, high-precision sensors to thousands per second, the speed of auto-detection "golden key" floating position, and automatically increase or decrease in the magnetic field so that the key is always in the best position. Thus, despite the naked eye look "golden key" as if suspended in the air stand still, in fact, keep doing in the moment micron-level fluctuations. Another system is generated rotating magnetic field so that the "golden key" to automatically rotate every 9 seconds a week.
In such a small space, how to ensure that two different magnetic levitation control system for mutual interference, to overcome the mechanical rotation to bring the vibration of a complex electromagnetic environment in the field to overcome electromagnetic interference and maintain the stability of a long suspension and rotation, is a major technical difficulties. Fan to say, China University of Science and Technology of the technical use of long accumulation, succeeded in solving this problem.
Open Expo in the "Golden Key" slowly turning the occasion, abstract "armillary sphere" device, two gold rings also automatically rise, and around the "golden key" to do forward and reverse rotation stop , full of artistic beauty. Details behind this seemingly simple, in fact embodied the designer's creativity and mechanical intelligence.

According starter mechanical designer, China Shipbuilding Industry Corporation No. 704 Institute of home inspection engineers introduce Chang, "armillary sphere" on the two ring diameters up to 1.6 meters and 2 meters, in order to achieve the perfect visual effects without compromising control of the "Golden Key" of the magnetic levitation system, installation of mechanical design using a variety of new composite materials, sophisticated way to "golden key" mosaic in which the magnetic field control system.
How to make "armillary sphere" automatically rise two golden rings and do forward and reverse rotation, mechanical designers have taken great pains a few easy to program. Finally, the engineers had an idea to a kind of high-speed moving objects can serve as buffers "on the air damper" reverse use them. That prior to the air damper piston rod compression, when the device starts, "armillary sphere," the base of the disk starts to rotate when the body through a sophisticated, automatic air damper top of the piston rod, thereby pulling the hidden disk groove slowly rising within two rings, is the direction of movement of the disc is driven ring rotation, simple and ingenious.
"Civilization's heritage and technological innovation are the two human leads to a better future 'golden key'. Open the door to a small unit of Shanghai World Expo, the Expo is a lively interpretation of the heritage of human civilization, the pursuit of innovative flash the big stage. "Shanghai World Expo Park opening ceremony of the total, said director Li Xie Zhi.