Research on Temperature and Light Control System of Vertical Farm Based on PLC

Vertical agriculture has a distinctive feature of agricultural industrialization consortium. Because of its highly intensive, large-scale and industrialized operation, it has become a new agricultural planting mode. The normal operation of vertical farms cannot be supported by a single technology. It needs to integrate many factors such as buildings, facility agriculture, ecological restoration, agricultural Internet of Things and intelligent agricultural machinery. Then, the first thing to be solved is the problem of temperature and light. All of them adopt artificial light mode, which is difficult to realize in production due to the restriction of electric power. Therefore, it is necessary to develop an automatic temperature, humidity and illumination control system for vertical farms in order to detect temperature, humidity and illumination in real time. Therefore, this paper studies the temperature and light control system based on Programmable Logic Controller (PLC). By controlling the environmental factors affecting crop growth, such as temperature, light, humidity and CO2, the crops can obtain the best growth conditions, improve and optimize the crop quality and yield, and obtain the maximum ecological, social and economic benefits. The experimental results show that the temperature monitoring system can control the indoor temperature of the farm within the temperature range required for plant growth, and the maximum relative error of control is 3.17%.