Energy saving of plant cultivation system using LED control system based on ultrasonic sensor

Abstract

For great economics and capable commercialization of fully controlled plant factory, various researches are required such as energy-efficient design of artificial light which is major of energy consumption and the best environmental controlling technology for plant photosynthesis and so on. To reduce energy consumption and promote the plant growth, appropriate combination of wave length and PPFD(Photosynthetic Photon Flux density) must be supplied according to the stages of plant growth and the sort of plants. Therefore, this paper suggests the architecture of LED control system based on ultrasonic sensor to promote plant growth by supplying appropriate PPFD. Using ultrasonic sensor, the distance between the light and plant according to the stages of plant is measured to supply proper PPFD and light equipment is moved directly. Using proposed system, it is verified that PPFD heavily influences the growth of plant and supplying of suitable PPFD according to the stages of growth promotes the plant growth. Promotion of plant growth reduces the periods of plant cultivation and leads to reduce energy consumption in plant factory. © 2011 Springer-Verlag.