On the morning of May 15, the 370-day, longest-running "Yuegong 365" experiment conducted by Beijing University of Aeronautics and Astronautics' "Yuegong No. 1" was a complete success, once again setting a new world record for human beings to live in a closed state. Special reports from authoritative media such as CCTV's "News Network" and CCTV News Channel have aroused world attention.
“Yuegong No.1†consists of one combined cabin and two plant cabins with a total area of ​​160 square meters and a total volume of 500 cubic meters. The integrated cabin includes living rooms, personnel exchanges and workshops, washrooms, waste disposal and insect rooms. Each plant compartment is divided into 2 plant spaces, which can be independently controlled according to different plant growth needs.
During the outing ceremony on the 15th, four volunteers walked out of the hatch with carrots, tomatoes, etc. they planted in the "Yuegong" experimental cabin.
How to grow plants in an outer space environment? In the absence of sunlight, it is necessary to fully use the artificial light source system to meet the growth needs of all these plants, and strictly limit the energy consumption, heat release, light quality, light intensity, light uniformity, life, and waterproof of the lamps. The level and safety level requirements are also very high. It also requires long-term continuous and uninterrupted work, and can be intelligently controlled and manually controlled to switch freely. Currently, only LEDs are likely to solve the above problems.
The plant growth light source project of the ground simulation space survival system of Yuegong No. 1 Plant Compartment II was provided by Professor Liu Hong of Beijing University of Aeronautics and Astronautics. Professor Liu Hong specially explained to the extreme wisdom: the technical standards and design requirements and design of the light source It is proposed by Beihang that the company processes and manufactures and installs light sources. The setting of light formula and light system in specific cultivation has nothing to do with the enterprise. And the plant successfully achieves high-efficiency cultivation, which is only one of many factors.) The lamps and lanterns are limited by Xiamen Tongyu Technology Co., Ltd. The company develops and produces, and Beijing Ou Si Design Co., Ltd. carries out engineering installation.
After many discussions and tests, the final plant growth light source engineering design in the cabin uses 145 1 meter long 100W intelligent 4-channel plant growth light source (lamp), 162 1.2 meters 120W intelligent 4-channel plant growth light source (lamp), 6 Wireless intelligent gateway using 2.4G6 Lowpan wireless communication protocol, two wireless routers.
According to Xu Hong, co-founder and chief technology officer of Xiamen Tongyu Technology Co., Ltd., it is necessary to plant dozens of food crops such as soybeans and oil peas in plant cabin II, as well as solanaceous crops such as pepper, eggplant and tomato. Leafy crops such as rapeseed, lettuce, and schizonepeta. Therefore, for different types of crops, different growth cycles, and different time periods, the scheme adopts an independent “multi-channel†wireless dimming method to ensure the light demand of various plants in the plant cabin II.
Figure: Design solution specific control system to build
The Plant Growth Light Source Project of the Ground Simulation Space Survival System of the "Yuegong No. 1" Plant Compartment II pioneered four channels of independent regulation and the combination of peak wavelengths conformed to the plant photosynthesis absorption response curve, which was first realized on a plant fixture (system). According to the photosynthesis characteristics of different crops, it can be freely regulated in light quality, photoperiod and photon flux density, which establishes a systematic basis for the research and development of light formulas of different crops.
In addition, IOT-6lowpan's intelligent control system was first used to establish a wireless Internet of Things, including integrated intelligent sensors for agriculture, which established a system foundation for modern agriculture and artificial intelligence smart agriculture.
The system provides light source support for the completion of the experiment, and the benefits brought by the "Yuegong 365" experiment to ensure the normal growth of 30 crops in the "Yuegong 365" experiment, to ensure the vegetables, fruits and food needed for the survival of 4 people for 370 days. Contributed.
With the application of LED in agriculture, humans can even produce crops in non-cultivable land such as space, desert, Gobi, etc. Therefore, plant factories are internationally recognized as a high-level development stage of facility agriculture, which is a measure of a country's high agricultural technology. One of the important signs. In the "Yuegong 365" experiment, all the food, vegetables and fruits eaten by the four people were recycled by the system using semiconductor light sources, achieving the world's highest food supply rate and the highest degree of closure. The success of the experiment not only promoted the development of China's space deep space exploration technology, but also made a major breakthrough in the application of semiconductor in agriculture.
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