Design Of Auto-controlling System For The Orchard Environment Of Frost And High Temperature Resistance

With a vast territory, various types of climates, complicated natural conditions of hot summer and cold winter, what effects the growth of agricultural crops seriously. The thesis present and design a kind of auto-controlling system for the orchard environment of frost and high temperature resistance what is different from the traditional method auto-controlling system.According to the condition, control characteristics and control method of environment factors such as temperature, humidity which influence agricultural crops growing in orchard. The thesis put forward the project controlling these environment factors intelligently that was fit for this system. Considering different orchards, different areas, different request of different customers, the intelligent monitor and control system for environment was designed for the three kinds of constituting mode. According to actual demand, the customers can choose the fit mode.Adopting STC89C51 of strong anti-jamming and ultra-low-power consumption microcontroller as a core ,the intelligent temperature and humidity sensors were used to collect data in spot , infrared remote control techniques was used to facility consumer use. There were three displaying modes of calendar, parameter setting, temperature and humidity. RS-485 multiprocessor communication was designed in the thesis to establish communication in the different parts of orchard.With the receiving data being coped with the method of digital filter such as extreme value controlling, the control signal was set out. In the aspect of software, program block design was given. The multi-task clock by which different delay time was set was adopted when designed, and the reliability and expansibility of the system was improved.It is another emphasis that sprinkler irrigation system and frost fans were designed in the thesis. It put forward system general layout in orchard, the method of selecting pipelines and water sprayers and prospect of the application of frost fans.Based on the device, lots of experiments prove that the system was right and viable. Finally, the thesis was summarized, the main work that the thesis completed was introduced, the main work that characteristics and the significance was explained, at the same time, the shortage and the improved idea were pointed out and the preparation was made for the further research in future.