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Wireless Control Network for Variable Environment Control in Greenhouse

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan

Citation:  Paper number  131588333,  2013 Kansas City, Missouri, July 21 - July 24, 2013. (doi: @2013
Authors:   Sin-Woo Kang, Sun-Ok Chung, Seung-Oh Hur
Keywords:   Wireless Control Network Greenhouse Variable environment Zone control

Abstract. Protected crop production in greenhouse or plant factory provides year-round crop production and controllable yield and quality, but requires sensing and control devices to manage the environment. Conventionally, most of the protected facilities have been managed uniformly with single control unit (e.g., air-conditioner), although the environmental variables may different at different spatial and vertical locations. In this study, concept of variable environmental control for greenhouse was demonstrated using wireless control network technology. First, small-sized experimental greenhouse was constructed with dimensions of 2.6 x 3.8 x 2.2 m (W x L x H). The greenhouse was virtually divided into 4 parts: left front, left back, right front, and right back. For each part, sensors and actuators to manage temperature, humidity, light intensity, and soil water content were prepared and the devices were monitored and managed through wireless communication. Second, performance of the variable environmental control was evaluated for temperature, humidity, light intensity, and soil water content. Response time to change each environment for each part was evaluated and the uniformity of the environment for entire greenhouse was investigated. Finally, the results of variable environmental control was compared with the results of uniform control, Results of the study would be useful to manage greenhouse with less energy input and better environmental control.

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