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An Embedded System for Control of HydroponicNutrients

文献类型： 会议论文

第一作者： Woo Jae Cho

作者： Woo Jae Cho 1 ; Hak-Jin Kim 1 ; Dae Hyun Jung 1 ; Dong Wook Kim 1 ; Chang Ik Kang 2 ; Gyeong Lee Choi 3 ;

作者机构： 1.Dept. of Biosystems and Biomaterals Engineering, College of Agriculture and Life Sciences, Seoul National University, Seoul, Korea

2.Science Lab Center Co., ltd, Daejeon, Korea

3.Protected Horticulture Research Station, National Institute of Horticultural Herbal Science, Rural Development Administration, Gyeongsangnam-do, Korea

关键词： Ion-Selective Electrode;Greenhouse;Fertilizer;Nutrients;Automatic control

会议名称： Annual International Meeting of the American Society of Agricultural and Biological Enginners

主办单位：

页码： 2474-2481

摘要： For the efficiency of a closed hydroponic system used in greenhouses, an automated management system is needed for effectively supplying nutrients and controlling various environmental factors for plants. In this study, a WinCE-based embedded system consisting of an array of ion-selective electrodes (ISEs) and multiple metering pumps was developed to effectively manage concentrations of nutrients in recirculating hydroponic solution. An array of ion-selective electrodes (ISEs) based on PVC membraneswas fabricated to measure the concentrations of NO3; K+, and Ca2+ ions in recirculating hydroponic solution. A fertilizer dosing algorithm was developed to calculate the volumes of nutrient stock solutions to be supplied based on a comparison between thepreset and present concentrations of the three different nutrients. Prior to the cultivation of Kale crop, a stepwise spiking test was conducted using the developed embedded system programmed based on the dosing algorithm to see if the system could formulate different concentrations of the three different nutrients as desired. The results showed that there were highly linear relationships between the target concentrations and the prepared concentrations (coefficients of determinations >0.9). However, studies on the decreased concentrations of Ca ions prepared as compared to the target concentrations were needed.

分类号： S-532

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