Development of Fuzzy Control Systems in Portable Cultivation Chambers to Improve the Quality of Oyster Mushrooms

摘要

Oyster mushroom(Pleurotus sp.)grows optimally at a temperature of 25-30 °C.To stimulate the growth of shoots and increase the growth, mushrooms need air humidity around 80-85%.Mushrooms that grow in environments with humidity below 80% will be affected by impaired absorption of nutrients, causing dryness and impaired growth or death.The purpose of this study was to design an automatic temperature and humidity control system based on fuzzy logic to improve the quality and productivity of oyster mushrooms in portable cultivation chamber.The design includes the control of temperature based on fuzzy logic to control the temperature actuator(fan), and on/off control system on the humidifier in the prototype chamber of mushroom cultivation.Performance testing includes the average mass and length of the oyster mushroom stems which then compared their effectiveness between(1)automatic control systems based on fuzzy logic;(2)on/off control system;(3)as well as cultivation methods with conventional systems.The results of performance testing of fuzzy based automatic temperature and humidity control systems produced a mean mass of 132.33 g and the average length of the stem was 6.23 cm.It can be concluded that the different treatments in the cultivation process(fuzzy, on/off, and conventional)have a very significant effect on the average mass and stem length results.Fuzzy control systems produce better mushroom productivity, more energy efficient and environmentally friendly.