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Andrey Tetyuev, Olfa Kanoun
Method of Soil Moisture Measurement by Impedance Spectroscopy with Soil Type Recognition for In-Situ Applications
Keywords: soil moisture measurement, impedance spectroscopy, compensation of influence effects, principal components analysis, k-nearest neighbour method
Soil moisture sensor systems need extensive calibration processes because of the dependence on soil properties. A novel measurement method is presented which is based on impedance spectroscopy. This method takes advantage of impedance spectroscopy for the characterization of soil type and measurement of soil moisture with improved accuracy. A comprehensive compensation of cross-sensitivity effects is carried out. The soil type characterization was carried out by a multivariate analysis based on elaborated experimental investigations of different natural soils. The results show that the new measurement method provides a measurement accuracy that fulfills the requirements of respective applications.
tm – Technisches Messen, Oldenbourg Wissenschaftsverlag
Print ISSN: 0171-8096
Volume: 73, 07/2006
Pages: 404 - 412