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dc.contributor.authorZhao, Michael
dc.date.accessioned2015-08-12T04:34:47Z
dc.date.available2015-08-12T04:34:47Z
dc.date.issued2014-12
dc.identifier.otherzhao_michael_201412_ms
dc.identifier.urihttp://purl.galileo.usg.edu/uga_etd/zhao_michael_201412_ms
dc.identifier.urihttp://hdl.handle.net/10724/31545
dc.description.abstractTo mitigate concerns of nutrient deficiencies in recirculating hydroponic systems, a novel ion- specific controller utilizing a Raspberry Pi provides continuous monitoring, and automated correction of individual ion concentrations in a liquid reservoir. For the proof of principle, a selection of four ion-specific electrodes carry voltage information regarding K+, NO3-, Ca2+, and H+ concentrations to a custom PCB where it undergoes filtering and amplification. Ion concentrations are detected in real time, and compared to a predefined concentration. If needed, an automated controller will precisely inject a liquid-ion solution into the main reservoir. This mechanism utilizes a linear slide with a stepper motor, and lead screw to cycle a syringe. Double-check valves connect this syringe with a high molarity stock ion solution, and the nutrient reservoir. Through this type of control system, ion concentrations are controlled to a grower set point.
dc.languageeng
dc.publisheruga
dc.rightsOn Campus Only Until 2016-12-01
dc.subjecthydroponics
dc.subjectIon-specific electrodes
dc.subjectISE
dc.subjectRaspberry Pi
dc.subjectRecirculation
dc.subjectSoilless culture
dc.subjectreservoir control
dc.subjection-control
dc.titleSinking sensors in solution
dc.title.alternativea novel hydroponic ion control system
dc.typeThesis
dc.description.degreeMS
dc.description.departmentBiological and Agricultural Engineering
dc.description.majorBiological Engineering
dc.description.advisorMark A. Haidekker
dc.description.committeeMark A. Haidekker
dc.description.committeeAnish Malladi
dc.description.committeeChangying Li


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