| Title |
A Study on System Design for Tracking the Optimal Light Compensation Point of Plants |
| Authors |
Seung-Oh Ko ; Yung-Deug Son |
| DOI |
http://doi.org/10.5207/JIEIE.2022.36.2.001 |
| Keywords |
Horticulture LED; Illuminance compensation; LED control; Light compensation point; PPFD |
| Abstract |
This paper implemented the PWM(Pulse Width Modulation) dimming control method of LED lighting. The PPFD(Photosynthetic Photon Flux Density) value required for plant growth was recognized, the relationship between illuminance and PPFD was verified, and a light output control system using a illuminometer was finally designed. A smart greenhouse basically requires nutrient solution control, shading control, air conditioning control, and CO2 gas control, and there is a limit to natural light in areas with insufficient sunlight or at times. Therefore, an additional light beam is required. Currently, most of the beam light control systems use the on/off control method. However, if you control the light beam, you can control the plant's day length. Also, when used together with other control systems, it is excellent for creating an environment necessary for growth. As a result, in this paper, we tried to design and prove the performance of an optimal LED beam automatic control system that can track the optimal optical compensation point required for plant growth. |