Study On Intelligent Control System Of Edible Fungus Growth Environment

As edible fungus is more and more accepted by people dining habits, the daily demand of edible fungus also increase gradually, the traditional mode of production of small workshops has obviously can’t satisfy people’s demands, which also led to China’s edible fungus industry has been growing by leaps and bounds. Rapid development also brings the innovation of technology and production mode, edible fungus production automation, integration and information reflect the current development direction. In order to ensure the balance of edible fungus yield and quality, avoid the occurring of attend the heavy production of light quality, the measurement and control of environment for the growth of edible fungus is particularly important. Aiming at this problem, this thesis studies a set of edible fungus growth environment intelligent control system, the system is designed to improve the edible fungus growth environment, ensure the edible fungus growing in the most appropriate environment, so as to improve the yield and quality of edible fungus.This thesis uses Freescale 32-bit single-chip microcomputer K60 unit as the core of the control system, and the chips integrates sensor technology, wireless communication technology, signal processing technology, etc.as a bridge, and designs a PC interface which is convenient to inspect and control the system. The system spends low cost, low energy consumption, strong practicability, also can collect real-time parameters of environment and control effectively.Based on a large number of relevant materials preparation, it designs the control strategy and design scheme of software and hardware of this system after finishing analysis. Aiming at environment factors such as temperature, humidity, CO2 concentration and light, the relevant real-time data is collected and will be sent to PC through wireless communication module, is controlled by PC and send instructions. The fuzzy PID control technology is used as the core of the control algorithm of the system, through the collection and comparison and analysis of the preset quantity deviation, precise control of the corresponding control device to adjust to the environment, make the environment parameter continued to maintain in the edible fungus growth best conditions.Before practically applying in the culture room, the thesis establishes an edible fungus growth environment model according to the actual structure of the culture room, in the model of the control system has carried on the preliminary inspection and debugging, fuzzy PID control algorithm is reflected very well.This system is examined for the test of practical application in Jilin Agricultural University institute of fungus, with the culture room the curve of the existing product testing equipment to collect data, and using least squares curve fitting, and the temperature error of the system reduces from±0.5℃ to±0.3℃, relative humidity error from±2.5% to±1.5%. System accuracy is improved significantly. System studied in this thesis reduces the hardware cost and takes advantage of the software of the system response speed and control precision of a level at the same time; although it still needs to improve and upgrade, it still provides experiences for the subsequent development and research, then lays a foundation.