"God seven" spacecraft: the world's first application of LED light source, as a manned spacecraft lighting system

According to the Chinese Academy of Sciences, Shanghai Institute of Technical Physics was informed that the development of the "Shenzhou seven out of the cabin lights" will provide space for the astronauts to walk and space photography. This will be the world's first use of LED light source as a manned spacecraft lighting system, is also the first in mainland China for the outer space cabin lighting system.

It is understood that the "God seven" lighting will play a very important role in the spacewalk of astronauts. The "seven gods" into orbit, will be every 90 minutes a circle around the earth, one must have a period of time in the shadow, then very dark outside the cabin, the astronauts spacewalk must have light source lighting, camera system also needs lighting. "God seven" lighting uses the most advanced LED technology. China is also the world's first use of LED technology as a space capsule lighting outside the country, after the general use of foreign metal lamp outside the cabin lighting. "God seven" lighting research director Zhang Tao told researchers said, "the principle and the Beijing Olympic Games swimming pool water cube lighting is the same, however, because the lamp is used in the special space environment, must carry out all aspects of technology research. "

"God seven" lighting needs to overcome the difficulties mainly lies in: first, the outer space environment is very complex, to shadow temperature at sixty or seventy degrees below zero, the sunshine temperature is very high, a variety of space radiation and electrostatic lot, must withstand the harsh environment of these lights. Earlier, the Chinese Academy of Sciences, Shanghai Institute of physics and technology developed by the LED lighting has been used for some of the satellite's cabin lighting, but from the cabin to the cabin environment is very different. Secondly, there is no air in the outer space, the lighting source can not be the same as on the earth through the air convection heat dissipation, the need to make full use of metal conduction, thermal radiation cooling technology. Third, the aerospace lighting system needs to achieve high efficiency, low power consumption. At present, the luminous efficiency of LED, in the laboratory has been able to achieve more than and 100 lumens / watt. At the same time, "God seven" lighting system power consumption is very small, only 27 watts, saving valuable energy for the "God of the" other parts of the work of the seven. Researchers since 2003 to undertake the god seven lighting system project, to the delivery of the sample in May 2007, after years of research, one by one to solve the above problems. For example, the "seven gods" lighting surface is the selection of some inorganic coating in the sunshine can reflect sunlight out in shadow can put their heat radiation out. Zhang Tao pointed out that the "seven gods" lights on the whole looks like a square box, the light-emitting surface is provided with a certain radian polyhedron, the role of the concentrated light to want to take place, the lighting angle for about 160 degrees, 90 degrees below. "God seven" lamp contains 24 luminous sources, the total power consumption of 27 watts.

Such a high-tech lighting system, the scale is not large, is a width of about 20 cm, about 10 cm high, about 6 cm thick small box, weighing about 1.8 kg. Zhang Tao said, "don't it" small "misunderstanding, the total load of avionic equipment has strict requirements on the system requirements is minimal power consumption, minimal volume, light quality, the smaller the more high technology content. "

Map: the Shenzhou seven fully equipped for

Source: LEDinside