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Probe characterisation, design and evaluation for the real-time quality Indication of milk

dc.contributor.advisorFourie, C. J.
dc.contributor.authorVan der Westhuyzen, Petrus Johannesen_ZA
dc.contributor.otherUniversity of Stellenbosch. Faculty of Engineering. Dept. of Electrical and Electronic Engineering.
dc.date.accessioned2008-01-17T12:53:27Zen_ZA
dc.date.accessioned2010-06-01T08:33:45Z
dc.date.available2008-01-17T12:53:27Zen_ZA
dc.date.available2010-06-01T08:33:45Z
dc.date.issued2006-12en_ZA
dc.identifier.urihttp://hdl.handle.net/10019.1/1804
dc.descriptionThesis (MScEng (Electrical and Electronic Engineering))--University of Stellenbosch, 2006.
dc.description.abstractIn order to rapidly detect, monitor and predict changes in milk as it ferments, sensors would need to be designed specifically for milk. To this end, invasive surgical stainless steel probes were investigated and the probe impedances were characterised according to measurements made in various saline concentrations. Based on these findings, specific probes were designed that were robust and easy to use in milk. To measure multiple probe sensors continuously and accurately, an automatic measurement device was designed and manufactured. The device was self-sustaining, portable and calculated and stored all probe impedance data internally, allowing experimental runs to take place in controlled laboratory environments. The probes designed in this thesis were consequently tested in various milk fermentation experiments and it was found that surgical stainless steel probes were effective at detecting and monitoring fermentation changes. The probe impedance changes also lead the pH changes in milk, giving it a predictive element. The probe sensor studies provided enough data so that studies could be done into potential non-invasive sensors. Therefore, capacitive sensors were investigated and a fringe field capacitor was presented as a potential non-invasive milk fermentation sensor.en_ZA
dc.format.extent1844364 bytesen_ZA
dc.format.mimetypeapplication/pdfen_ZA
dc.language.isoenen_ZA
dc.publisherStellenbosch : University of Stellenbosch
dc.subjectDetectorsen_ZA
dc.subjectCapacitance meters -- Design and constructionen_ZA
dc.subjectElectronic instruments -- Design and constructionen_ZA
dc.subjectDissertations -- Electronic engineeringen_ZA
dc.subjectTheses -- Electronic engineeringen_ZA
dc.subject.otherElectrical and Electronic Engineeringen_ZA
dc.titleProbe characterisation, design and evaluation for the real-time quality Indication of milken_ZA
dc.typeThesisen_ZA
dc.rights.holderUniversity of Stellenbosch


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