[ China Agricultural Machinery Industry News ] Now that the application of drones in the agricultural field is mentioned, many people think of the scene of spraying liquid medicine. It is true that spraying liquid has become a common and important function of agricultural drones, and the drones carrying the medicine boxes are expanding in the global agricultural field. However, with the advancement of smart agriculture and agriculture, agricultural remote sensing has become a very potential and “money†application for agricultural drones.
Agricultural UAVs Multi-directional Development of Agricultural Remote Sensing into Potential Applications
Remote sensing technology has the advantages of large amount of information, multi-platform and multi-resolution, fast and large coverage area. It is an important means to timely grasp the information of agricultural resources, crop growth and agricultural disasters.
Agricultural remote sensing monitoring mainly targets crops and soils, and their typical reflection spectrum curves are shown in the following figure. In the visible-near-infrared spectrum of crops, the reflectivity is mainly affected by crop pigment, cell structure and water content, especially in the visible red light band, which has a strong absorption band and strong reflection characteristics in the near-infrared band. It is used for monitoring crop growth, crop quality, crop pests and other aspects. The soil visible-near-infrared spectrum has a relatively low overall reflectivity, and is mainly affected by the coloring of soil organic matter and iron oxide in the visible spectrum. Therefore, the inherent reflection spectrum characteristics of soils, crops and other features are the basis of agricultural remote sensing.
Based on this, after decades of development research, agricultural remote sensing technology can now be used for agricultural land resource management, crop yield estimation, soil key attribute survey, soil erosion degradation survey, agricultural disaster monitoring, agricultural insurance damage, agricultural services. Among them, agriculture refers to the implementation of a set of modern agricultural operation technology and management system according to specific environment and requirements, positioning, timing and quantitative. Agriculture can adjust the input of crop elements in the process of crop growth according to soil traits. Low input achieves high output and utilizes various agricultural resources to improve the environment and achieve better economic and environmental benefits.
The traditional remote sensing technology is mainly satellite, but the satellite is susceptible to the weather environment, and the orbit period is long. It is often difficult to provide high-definition image data in time. The drone is flexible and easy to deploy. It can use the drone to obtain data information at any time. It can be used as a supplement to other remote sensing platforms such as satellites. Different platforms work together to become a more comprehensive agricultural monitoring network.
What PrecisionHawk, senseFly, Agribotix, and Sentera are doing is to promote the use of drones in agricultural remote sensing to achieve greater agricultural operations and benefits. However, the UAV agricultural remote sensing technology is still in its infancy, and there are problems such as insufficient data processing software and immature agricultural special load development. Unmanned aerial vehicles for the benefit of agriculture, but also need to overcome difficulties.
Central No. 1 Document: Developing Agricultural Remote Sensing Technology
In fact, agricultural remote sensing is not a new concept. As early as nearly half a century ago, the exploration of agricultural remote sensing technology began at home and abroad. Since the 1970s, the United States and European countries have used satellite remote sensing technology to establish a wide range of crop area monitoring and estimation systems.
China's agricultural remote sensing originated in the 1980s, relatively late. However, in recent years, the potential value of agricultural remote sensing has been increasingly recognized at the national level. In the year of 2017, the Central Committee of the Communist Party of China and the State Council publicly released the "Several Opinions on Deepening the Structural Reform of the Agricultural Supply Side and Accelerating the Cultivation of New Dynamics of Agricultural and Rural Development". This is the 14th consecutive guidance for the "three rural" work since the new century. Central No. 1 document.
This year's Central No. 1 Document pointed out that “actively promote agricultural informationization. Coordinate all kinds of big data platform resources, and establish a national agricultural data cloud platform that integrates data monitoring, analysis, release and service. Create a national modern agricultural demonstration zone. Approving the demonstration base for smart agriculture. Strengthening the construction of agricultural remote sensing infrastructure."
This is the first document of the Central Committee in 2016 that “promotes the promotion of 'Internet +' modern agriculture, applies modern information technologies such as Internet of Things, cloud computing, big data, mobile internet, etc., and promotes the transformation and upgrading of the entire industrial chain of agriculture. After the application of agricultural remote sensing technology, China has once again deployed agricultural informatization and agricultural remote sensing technology from the top design.
Agricultural development has always been the top priority of our government's work. From mechanization to modernization to wisdom and agriculture, China's agriculture has been moving towards a more scientific direction. It is foreseeable that the future of remote sensing technology, including drones, will play a vital role in China's smart agriculture and agricultural construction.
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