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dc.contributor.authorValente, A.-
dc.contributor.authorMorais, Raul-
dc.contributor.authorCouto, Carlos-
dc.contributor.authorCorreia, J. H.-
dc.identifier.citationINTERNATIONAL PORTUGUESE CONFERENCE ON AUTOMATIC CONTROL, 5, Aveiro, 2002 – “Portuguese Conference on Automatic Control : proceedings”. [S.l. : s.n., 2002]. p. 429-433.eng
dc.description.abstractThis paper presents a Multi-Chip-Module based (MCM) microsystem for irrigation management suitable for greenhouse environmental control. The proposed microsystem includes a soil moisture microsensor, analog interface and sigma-delta converter, and signal processing for digital filtering. A heat-pulse technique is used to determine the volumetric heat capacity and thus the water content of a porous media, such as the soil. This method is based on the Joule effect (heater probe) and on the Seebeck effect (temperature probe). By using CMOS standard processes (low-cost) and wireless capabilities, a wireless network architecture can be implemented for measuring the soil moisture at the plant root level.eng
dc.subjectSoil moisture probeeng
dc.subjectMixed-signal interfaceeng
dc.subjectSmart sensorseng
dc.titleA bulk-micromachined soil moisture probe with a mixed-signal interfaceeng
Appears in Collections:DEI - Artigos em atas de congressos internacionais

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