Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/4860
Título: | On-chip integrated silicon bulk-micromachined soil moisture sensor with electronics and bus interface |
Autor(es): | Valente, A. Correia, J. H. Couto, Carlos |
Palavras-chave: | Soil moisture sensor Bus interface |
Data: | 4-Dez-2000 |
Editora: | IEEE |
Citação: | IEEE INTERNATIONAL SYMPOSIUM ON INDUSTRIAL ELECTRONICS, 2000, Puebla, Mexico – “ISIE'2000 : proceedings”. Piscataway : Institute of Electrical and Electronics Engineers, 2000. ISBN 0-7803-6606-9. vol.1. p. 576-579. |
Resumo(s): | This paper presents an on-chip silicon bulkmicromachined Soil Moisture Sensor (SMS) for irrigation control in greenhouses. The system-on-a-chip includes the SMS, readout electronics, self-test, calibration facilities and a digital bus interface for external data transmission. Moreover, this low-cost device can be applied in several locations (e. g. per each plant root), and networked together with the 1-wire bus. The heat-pulse technique is used (for measuring the maximum temperature on a distant point) to determine the volumetric heat capacity and hence the water content of a porous media, such as soil. In order to validate this method, experimental results were achieved with a macrosensor based on the heat-pulse and capacitance methods. The capacitance method relates the volumetric water content with the capacitance change (dielectric properties) of a probe, inserted in the soil. Several tests were performed for different type of soils and water contents. These results are compared with the measurements achieved using the conventional thermogravimetric method. |
Tipo: | Artigo em ata de conferência |
URI: | https://hdl.handle.net/1822/4860 |
ISBN: | 0-7803-6606-9 |
Acesso: | Acesso aberto |
Aparece nas coleções: | DEI - Artigos em atas de congressos internacionais |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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AV_ISIE00.pdf | Documento principal | 341,33 kB | Adobe PDF | Ver/Abrir |