At 9:22 on June 17, the Shenzhou 12 manned spacecraft with three astronauts was launched from the Jiuquan Satellite Launch Center. The Shenzhou 12 manned spacecraft will rendezvous and dock with the space station, and the astronauts will enter the space station to live and work. Since the space station will periodically pass through the shadow area of the earth and experience a long period of darkness when flying in orbit, the lighting problem is very important in rendezvous and docking. The 510 Institute of the Fifth Academy of the Aerospace Science and Technology Group undertook the task of developing the lighting equipment in the manned spacecraft cabin and the rendezvous and docking lighting equipment. It not only provided the cabin work and life lighting for the astronauts, but also provided the rendezvous and docking between the manned spacecraft and the space station in the shadow area Auxiliary lighting for camera is provided.
In order to meet the requirements of the complex and harsh environment in space, the Shenzhou 12 manned spacecraft cabin lighting equipment (close-range flood lighting) and rendezvous and docking lighting equipment (long-distance light-transmitting lighting) adopt advanced solid-state lighting sources. The advantages of this light source are impact resistance, vibration resistance, low power consumption, and high stability. However, due to the performance of luminescent materials, solid-state lighting is more sensitive to high temperature and low temperature environments. For this reason, the 5th Academy of Aerospace Science and Technology Group 510 The research and development team carried out a large number of long-term technical research and finally solved the temperature problem. Regarding the problem of adaptability to the space environment, in order to reduce the impact of ultraviolet radiation, total dose radiation, atomic oxygen and other special space environments on product life and reliability, the development team has successively broken through the design of the space secondary optical system and the on-orbit resistance. Technical problems such as the design of special space environment and the design of sensitive devices against mechanical environment.
When the manned spacecraft enters the shadow area of the earth, the astronauts can still correctly interpret the instrument data and manual switch commands in the cabin, which adds a guarantee for the success of the rendezvous and docking.
