Abstract
This study proposes a fuzzy logic controller for adjusting the electrical conductivity (EC) and pH of the nutrient solution in a hydroponic system. The proposed control system detects the EC and pH of the solution through sensors and adjusts the working time of the solution pump through the fuzzy controller. Specifically, the EC and pH of the nutrient solution are maintained at specific values. A Raspberry Pi3 development board is used in the proposed control system to realize and solve the problem of adjusting the EC and pH of the solution. In the fuzzy controller, the inputs are EC and pH sensors, and the output is the operating time of the pump. Experimental results indicate that the proposed control system can effectively reduce the measurement burden and complex calculations of producers by adjusting nutrient solutions.
Highlights
Introduction and pH in Hydroponic CultivationHydroponics technology is used throughout the world
Most hydroponic nutrient solutions are prepared in a traditional manner, with their electrical conductivity (EC) and pH manually measured by producers, often daily
High EC nutrient solution, water, an acid, and an alkali were used for the initial nutrient solution
Summary
Introduction and pH in Hydroponic CultivationHydroponics technology is used throughout the world. Most hydroponic nutrient solutions are prepared in a traditional manner, with their electrical conductivity (EC) and pH manually measured by producers, often daily. The conditions to be controlled to promote plant growth include ambient temperature, light, water temperature, water oxygen concentration, humidity, water level, EC, pH, and nitrate level [1,2,3,4,5]. These conditions have been closely studied, and manufacturers exhibit equipment designed to address them at international exhibitions. The key to stable hydroponic growth remains the balance of the nutrient solution. The solution is formulated with the fertilizer required by the crop for optimal growth until harvest [6]
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