"Moon Palace No. 1" reveals the plant lighting technology in the cabin

On the morning of May 15th, the 370-day "Yuegong 1" experiment conducted by Beihang University and the world's longest "Yuegong 365" experiment was a complete success, once again setting a new world record for human beings to live in a closed space. CCTV's "News Network", CCTV News Channel and other authoritative media made special reports, which attracted worldwide attention.

"Moon Palace No. 1" consists of one comprehensive 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 room, personnel communication and working room, washing room, waste disposal room and insect room. Each plant compartment is divided into two plant rooms, which can independently control the environmental conditions according to the growth needs of different plants.

During the exit ceremony on the 15th, four volunteers walked out of the hatch with the carrots and tomatoes they had grown in the "Moon Palace" experimental cabin.

How to grow plants in the environment of outer space? In the absence of sunlight, it is necessary to fully use artificial light source systems to meet the growth needs of all these plants, and strictly limit energy consumption and heat release, which will affect the light quality, light intensity, light uniformity, lifespan, and waterproof of lamps. The level and safety level requirements are also very high, and it is also required to be able to work continuously and continuously for a long time, and can switch freely between intelligent control and manual control. Currently, only LED lighting has the potential to solve the above problems.

After many discussions and tests, the final plant growth light source engineering design plan in the cabin adopts 145 1-meter-long 100W intelligent 4-channel plant growth light sources (lamps), 162 1.2-meter 120W intelligent 4-channel plant growth light sources (lamps), 6 The wireless intelligent gateway adopts 2.4G6Lowpan wireless communication protocol, and two wireless routers are networked.

The plant growth light source project of the ground simulation space survival system of the "Moon Palace No. 1" Plant Cabin II is the first to create 4 channels of independent regulation and the combination of peak wavelengths in line with the plant photosynthesis absorption response curve. According to the photosynthesis characteristics of different crops, free regulation can be carried out on light quality, photoperiod and light quantum flux density, and a systematic foundation has been established for the research work of the light formula of different crops.

In addition, the intelligent control system of IOT-6lowpan was adopted for the first time, and a wireless Internet of Things including integrated intelligent sensors dedicated to agriculture was established, which established a system foundation for modern agriculture and artificial intelligence smart agriculture.

The lighting system provided light source support for the completion of the experiment, and the benefits brought by it ensured the light source required for the normal growth of 30 crops in the "Moon Palace 365" experiment, and provided vegetables, fruits and grains for the 370-day survival of four people. made a contribution.

With the application of LED lighting in the field of agriculture, humans can even produce crops in space, deserts, Gobi and other non-arable lands. Therefore, plant factories are internationally recognized as an advanced development stage of facility agriculture, and it is a measure of a country's agricultural high-tech level. One of the important signs of . In the "Moon Palace 365" experiment, the food, vegetables, and fruits eaten by the four people were all 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 aerospace deep space exploration technology, but also a major breakthrough in the application of semiconductor lighting in the agricultural field.