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Design and development of prototypes of fiber optic sensors for soil nutrients detection and ph for application in precision agriculture

Grant number: 19/22968-3
Support type:Research Grants - Innovative Research in Small Business - PIPE
Duration: May 01, 2022 - January 31, 2023
Field of knowledge:Physical Sciences and Mathematics - Physics - Condensed Matter Physics
Principal researcher:Jonas Fontes Garcia
Grantee:Jonas Fontes Garcia
Company:Luxtec Sistemas Ópticos Ltda
CNAE: Atividades de apoio à agricultura
Atividades de apoio à produção florestal
City: Campinas


In this project, we intend to develop a colorimeter based on multimode optical fibers to determine the values of N, P and K in soil samples as well as their pH, by performing the colorimetric measurement of the aqueous solution of the same. The color sensor is based on the principle of the selective absorption of certain wavelengths of light by the solution. The sensor probe along with signal processing circuits will be constructed to detect the amount of the deficient component in the soil and thus guide the fertilization with the required amount of fertilizer and pH correction. The cost of this colorimeter is two orders of magnitude less than that of a commercial. All these advantages allow a low-cost detection operation and good accuracy in a monitoring network. The colorimeter to be developed has excellent prospects for applications in precision, environmental and biological agriculture. (AU)

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