title: Using a Novel Wireless-Networked Decentralized Control Scheme under Unpredictable Environmental Conditions.
abstract: The direction of sunshine or the installation sites of environmental control facilities in the greenhouse result in different temperature and humidity levels in the various zones of the greenhouse, and thus, the production quality of crop is inconsistent. This study proposed a wireless-networked decentralized fuzzy control scheme to regulate the environmental parameters of various culture zones within a greenhouse. The proposed scheme can create different environmental conditions for cultivating different crops in various zones and achieve diversification or standardization of crop production. A star-type wireless sensor network is utilized to communicate with each sensing node, actuator node, and control node in various zones within the greenhouse. The fuzzy rule-based inference system is used to regulate the environmental parameters for temperature and humidity based on real-time data of plant growth response provided by a growth stage selector. The growth stage selector defines the control ranges of temperature and humidity of the various culture zones according to the leaf area of the plant, the number of leaves, and the cumulative amount of light. The experimental results show that the proposed scheme is stable and robust and provides basis for future greenhouse applications.
authors.affiliation: Department of Biomechatronics Engineering, National Pingtung University of Science and Technology, Pingtung County, 91201, Taiwan. chungliang@mail.npust.edu.tw.
authors.forename: Chung-Liang
authors.initials: CL
authors.lastname: Chang
authors.affiliation: Department of Biomechatronics Engineering, National Pingtung University of Science and Technology, Pingtung County, 91201, Taiwan. snake576@gmail.com.
authors.forename: Yi-Ming
authors.initials: YM
authors.lastname: Huang
authors.affiliation: Department of Biomechatronics Engineering, National Pingtung University of Science and Technology, Pingtung County, 91201, Taiwan. e9744043@yahoo.com.tw.
authors.forename: Guo-Fong
authors.initials: GF
authors.lastname: Hong
mesh_terms: D000383:Agriculture / Q000379:methods*; D018556:Crops, Agricultural; D004784:Environmental Monitoring / Q000295:instrumentation* / Q000379:methods*; D004867:Equipment Design; D017143:Fuzzy Logic; D018545:Lactuca / Q000254:growth & development; D008027:Light; D018515:Plant Leaves / Q000502:physiology; D013696:Temperature; D014584:User-Computer Interface; D059015:Wireless Technology
keywords: environment control; fuzzy logic inference; graphic user interface; wireless sensor network