Weeding the grass in the afternoon, sweat dripping under the soil. It may be difficult for people who have not experienced the hard work of farming. With the development of science and technology, the workload of farmers can be reduced, and it is expected to realize automation completely. According to domestic media reports, recently, the rice unmanned farm of South China Agricultural University has produced the first batch of rice. The cultivation, planting, management and harvest of this batch of rice are completed by unmanned agricultural machinery, which is the first time in China < / P > < p > on May 3, the unmanned rotary tiller was used to complete the land tillage; on May 9, the unmanned rice dry direct seeding machine was used for rice sowing; and then the unmanned agricultural machinery was used for rice planting Highland gap sprayers and unmanned helicopters have been fertilized and applied. < p > < p > on August 30, the unmanned harvester and grain truck cooperated to complete the harvest operation. At the harvest site, the expert group used five point sampling method to measure the yield. The theoretical yield of rice in the unmanned farm was 558.6 kg. Luo Xiwen, academician of the Chinese Academy of engineering, Professor of South China Agricultural University and special commissioner for rural science and technology of Guangdong Province, said: “unmanned farms can liberate the operators from the heavy driving operation and greatly improve the operation efficiency.” < p > < p > unmanned farm is a way to realize smart agriculture, including five features: full coverage of farming, management and collection of production links, automatic field transfer operation of hangar, automatic obstacle avoidance and abnormal parking to ensure safety, real-time full monitoring of crop production process, and all unmanned intelligent decision-making operation. < / P > < p > in the unmanned farm, rotary tillers, tractors and other machinery, according to the designed procedures, drive from the hangar to the field operation, and then return to the hangar, so that the agricultural work can be easily completed and the whole process of unmanned production can be realized.

since 2004, the Luo Xiwen team has begun to study agricultural machinery navigation and automatic operation. It has broken through ten key technologies, and has developed unmanned rotary tiller, seeder, rice transplanter, high altitude gap sprayer and harvester. The realization of unmanned farm depends on three technologies, “biotechnology, intelligent agricultural machinery and information technology”. Luo Xiwen specially mentioned that “in terms of intelligent agricultural machinery and information technology, it mainly relies on Beidou navigation and positioning system and 5g communication system.” < / P > < p > Beidou navigation and positioning system mainly provides accurate positioning, 5g communication system processes a large amount of information in real time, and the information transmission speed is fast. At present, the straight-line walking accuracy of unmanned agricultural machinery can reach 2.5cm. For the question of when the unmanned farm can be popularized in a large scale, Luo Xiwen said that two conditions should be met: “first, the infrastructure should be good, and the water network, road network, power grid and communication signal of farmland should meet certain conditions; second, the land should be large, and the small and scattered land should be effectively integrated.” SpaceX beat blue origin and Northrop Grumman to win a $316 million air force contract