Automatic Variable Rate Fertilizer Control System Based On ARM

The step of changing from traditional agriculture to modern agriculture is accelerated, along with the development of technology and application of all kinds of high technology on agricultural. Precision Agriculture (PA) is considered as an efficient mode of the world agriculture's development. The contradiction of less ground while more people and the improper use of pesticide and fertilizer is increasingly rigorous. The urgent affairs in our country is to adopt precision agriculture technique, particularly the Variable Rate Fertilization (VRF) technology.There are main two methods to implement VRF technology. One is map-based application and another is real-time sensor-based and control-based application. Map-based VRF technology is the research hotspot. The flow of technology of map-based VRF technology can be done by applying GPS and GIS integration technology to obtain the farm electric map, and Making decision by plotting grids, naming cells, testing soil to get nutrient in soil, and build the nutrient databases. When exercising in farm, DGPS sign is got by CPU and adjust fertilization shaft rotate speed to realize VRF by identifying cell lying by applicator and transferring decision-making information.VRF technology is a rather reasonable and advanced technology by its thought of technology. But it is rather difficult to spread this technology all over our country. Actualizing VRF technology should adjust measures to local conditions and adapt to current situation of our country's development. Take located fertilization by GPS, there will be too much early devotion and the operation is complex. So it is incapable to realize in short time under the economic and civilization level of farmers in our country. Therefore the thesis brings forward a study scheme on control system of automatic variable rate fertilizer based on ARM which is located with speed sensor instead of GPS with the method of caltulation positioning.There are two main research parts in this thesis:(1) Design and empolder a controller of automatic variable rate fertilizer...