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TitleA MCM-based microsystem for soil moisture measurements
Author(s)Valente, A.
Morais, Raul
Couto, Carlos
Correia, J. H.
KeywordsSoil moisture sensor
Integrated microsensor
Heat capacity sensor
Sigma-Delta converter
Issue date2002
PublisherCzech Technical University (CTU)
CitationSANEISTR, J., RIPKA, P., ed. lit. – “Eurosensors XVI : book of abstracts : European Conference on Solid-State Transducers, 16, Prague, Czech Republic, 2002”. Prague : Czech Technical University, 2002. ISBN 80-01-02576-4. p.780-781.
Abstract(s)This work presents a Multi-Chip-Module (MCM) based microsystem for irrigation control in agriculture. The proposed microsystem includes a soil moisture microsensor, an analog-to-digital converter, signal processing circuits (digital filtering and sensor interface) and a RF 433MHz transmitter. A heat--pulse technique is used to determine the volumetric heat capacity and hence the water content of a porous media, such as the soil. This method is based on the Joule effect (heater probe) and in Seebeck effect (temperature probe). By using CMOS standard processes (low-cost) a network could be implemented in order to achieve an accurate measurement of the soil moisture at the plant root level.
TypeConference paper
AccessOpen access
Appears in Collections:DEI - Artigos em atas de congressos internacionais

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