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Journal article
Development and testing of an IoT spectroscopic nutrient monitoring system for use in micro indoor smart hydroponics
Horticulturae, Vol.9(2), Art. 185
2023
Abstract
Nutrient monitoring in Micro Indoor Smart Hydroponics (MISH) relies on measuring electrical conductivity or total dissolved solids to determine the amount of nutrients in a hydroponic solution. Neither method can distinguish concentrations of individual nutrients. This study presents the development and testing of a novel spectroscopic sensor system to monitor nitrogen changes in nutrient solutions for MISH systems. The design phase determined that using an inexpensive AS7265x Internet of Thing (IoT) sensor in a transflective spectroscopic application could effectively detect small fluctuations in nitrogen concentraation. Next, a novel transflective sensor apparatus was designed and constructed for use in a MISH system experiment, growing lettuce over 30 days. Two solution tanks of different sizes, 80 L and 40 L, were used in the deployment of the system. Samples from each tank were analyzed for nitrogen concentration in a laboratory, and multilinear regression was used to predict the nitrogen concentrations using the AS7265x 18 spectral channels recorded in the sensor system. Significant results were found for both tanks with an R-2 of 0.904 and 0.911 for the 80 and 40 L tanks, respectively. However, while the use of all wavelengths produced an accurate model, none of the individual wavelengths were indicative on their own. These findings indicate that the novel system presented in this study successfully and accurately monitors changes in nitrogen concentrations for MISH systems, using low cost IoT sensors.
Details
- Title
- Development and testing of an IoT spectroscopic nutrient monitoring system for use in micro indoor smart hydroponics
- Authors/Creators
- Joseph D. Stevens - Murdoch Univ, Sch Informat Technol, Dubai Campus Block 18 Dubai Knowledge Pk,POB 50070, Dubai, U Arab EmiratesDavid Murray - Murdoch Univ, Sch Informat Technol, Murdoch, WA 6150, AustraliaDean Diepeveen - Murdoch Univ, Coll Sci Hlth Engn & Educ, Murdoch, WA 6150, AustraliaDanny Toohey - Curtin University
- Publication Details
- Horticulturae, Vol.9(2), Art. 185
- Publisher
- MDPI
- Number of pages
- 22
- Identifiers
- 991005565369707891
- Copyright
- © 2023 by the authors.
- Murdoch Affiliation
- School of Information Technology
- Language
- English
- Resource Type
- Journal article
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- Collaboration types
- Domestic collaboration
- International collaboration
- Citation topics
- 2 Chemistry
- 2.59 Pigments, Sensors & Probes
- 2.59.684 Ion-Selective Electrodes
- Web Of Science research areas
- Horticulture
- ESI research areas
- Agricultural Sciences