Design Of Automatic Observation System Of Farmland Climate Based On ARM

Because of the changeable environment and climate,it is a difficult problem to collect the information of farmland climate factors in real time.In order to solve the above problem,a set of farmland climate data acquisition system is designed.The purpose of this system is to realize the real-time sampling,real-time query and data storage of farmland climate factors,and to provide the field observation data for farm managers and agricultural researchers.The system is designed based on embedded technology,sensor technology,electronic circuit technology and wireless communication technology.The working environment of the system is agricultural field environment.The system consists of two main parts,namely,the farmland climate data collector and the PC software.The farmland climate data collector includes the main collector and the minor collector.The main collector takes the AT9263 as CPU.The chip,which is a high precision analog to digital conversion chip,is used to complete analog to digital conversion.At the same time,the main collector offers GPRS wireless transmission function and CF card interface,which ensures the uploading of data in real time and long-term storage.The minor collector takes the STM32 as CPU and uses some pieces of industrial grade IC in signal processing circuit.The minor collector sends the data to the main collector,when the minor collector receives the command from the main collector.PC software is designed on Labview platform.It realizes these functions,which includes the real-time data displaying and the command sending and so on.The software is easy to operate and looks organized.It is convenient for manager to monitor and grasp the data of farmland.